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Human Metabolome Database Version 2.5

 

Showing metabocard for 5-Methyltetrahydrofolic acid (HMDB01396)

Legend: metabolite field enzyme field

Version 2.5
Creation Date 2005-11-16 15:48:42
Update Date 2009-05-05 20:58:45
Accession Number HMDB01396
Secondary Accession Numbers Not Available
Common Name 5-Methyltetrahydrofolic acid
Description 5 methyltetrahydrofolic acid (5-MTHF) is the most biologically active form of the B-vitamin folic acid, also known generically as folate. 5-MTHF functions, in concert with vitamin B12, as a methyl-group donor involved in the conversion of the amino acid homocysteine to methionine. Methyl (CH3) group donation is vital to many bodily processes, including serotonin, melatonin, and DNA synthesis. Therapeutically, 5-MTHF is instrumental in reducing homocysteine levels, preventing neural tube defects, and improving vascular endothelial function. Research on folate supplementation suggests it plays a key role in preventing cervical dysplasia and protecting against neoplasia in ulcerative colitis. Folic acid also shows promise as part of a nutritional protocol to treat vitiligo, and may reduce inflammation of the gingiva. Furthermore, certain neurological, cognitive, and psychiatric presentations may be secondary to folate deficiency. Such presentations include depression, peripheral neuropathy, myelopathy, restless legs syndrome, insomnia, dementia, forgetfulness, irritability, endogenous depression, organic psychosis, and schizophrenia-like syndromes. After ingestion, the process of conversion of folic acid to the metabolically active coenzyme forms is relatively complex. Synthesis of the active forms of folic acid requires several enzymes, adequate liver and intestinal function, and adequate supplies of riboflavin (B2), niacin (B3), pyridoxine (B6), zinc, vitamin C, and serine. After formation of the coenzyme forms of the vitamin in the liver, these metabolically active compounds are secreted into the small intestine with bile (the folate enterohepatic cycle), where they are reabsorbed and distributed to tissues throughout the body. Human pharmacokinetic studies indicate folic acid has high bioavailability, with large oral doses of folic acid substantially raising plasma levels in healthy subjects in a time and dose dependent manner. Red blood cells (RBCs) appear to be the storage depot for folic acid, as RBC levels remain elevated for periods in excess of 40 days following discontinuation of supplementation. Folic acid is poorly transported to the brain and rapidly cleared from the central nervous system. The primary methods of elimination of absorbed folic acid are fecal (through bile) and urinary. Despite the biochemical complexity of this process, evidence suggests oral supplementation with folic acid increases the body's pool of 5-MTHF in healthy individuals. However, enzyme defects, mal-absorption, digestive system pathology, and liver disease can result in impaired ability to activate folic acid. In fact, some individuals have a severe congenital deficiency of the enzyme Methyl tetrahydrofolate reductase (5-MTHFR), which is needed to convert folic acid to 5-MTHF. Milder forms of this enzyme defect likely interact with dietary folate status to determine risk for some disease conditions. In individuals with a genetic defect of this enzyme (whether mild or severe), supplementation with 5- MTHF might be preferable to folic acid supplementation. (PMID: 17176169)
Synonyms
  1. 5-Methyl tetrahydrofolate
  2. 5-Methyltetrahydropteroylglutamate
  3. 5-methyl-5,6,7,8-tetrahydrofolate
  4. 5-methyl-tetrahydrofolate
  5. Methyl folate
  6. N( 5)-Methyltetrahydrofolate
  7. N-(4-(((2-amino-1,4,5,6,7,8-hexahydro-5-methyl-4-oxo-6-pteridinyl)methyl)amino)benzoyl)-L-Glutamate
  8. N-(4-(((2-amino-1,4,5,6,7,8-hexahydro-5-methyl-4-oxo-6-pteridinyl)methyl)amino)benzoyl)-L-Glutamic acid
  9. N-(5-methyl-5,6,7,8-tetrahydropteroyl)-L-glutamate
  10. N-(5-methyl-5,6,7,8-tetrahydropteroyl)-L-glutamic acid
  11. N5-Methyl-tetrahydrofolate
  12. N5-Methyl-tetrahydrofolic acid
  13. N5-methyltetrahydropteroyl mono-L-glutamate
  14. [(6S)-5-methyl-5,6,7,8-tetrahydropteroyl]glutamate
  15. methyl-tetrahydrofolate
  16. 5-Methyltetrahydrofolate
  17. N5-methyltetrahydrofolate
Chemical IUPAC Name 2-[4-[(2-amino-5-methyl-4-oxo-1,6,7,8-tetrahydropteridin-6-yl)methylamino]benzoyl]aminopentanedioic acid
Chemical Formula C20H25N7O6
Chemical Structure Structure
Chemical Taxonomy
Kingdom
  • Organic
Super Class
  • Heterocyclic molecules
Class
  • Pterins
Sub Class
  • Tetrahydro-pterins
Family
  • Mammalian Metabolite
Species
  • primary amine
  • primary aromatic amine
  • secondary amine
  • secondary aliphatic/aromatic amine (alkylarylamine)
  • tertiary amine
  • tertiary aliphatic/aromatic amine (alkylarylamine)
  • carboxylic acid
  • secondary carboxylic acid amide
  • oxo(het)arene
  • aromatic compound
  • heterocyclic compound
Biofunction
  • Component of Methionine metabolism
Application
Source
  • Endogenous
Average Molecular Weight 459.456
Monoisotopic Molecular Weight 459.186646
Isomeric SMILES CN1C(CNC2=CC=C(C=C2)C(=O)N[C@H](CCC(O)=O)C(O)=O)CNC2=C1C(=O)NC(N)=N2
Canonical SMILES CN1C(CNC2=CC=C(C=C2)C(=O)NC(CCC(O)=O)C(O)=O)CNC2=C1C(=O)NC(N)=N2
KEGG Compound ID C00440 Link Image
BioCyc ID 5-METHYL-THF Link Image
BiGG ID 34988 Link Image
Wikipedia Link 5-Methyltetrahydrofolate Link Image
NuGOwiki Link HMDB01396 Link Image
Metagene Link HMDB01396 Link Image
METLIN ID 6215 Link Image
PubChem Compound 439234 Link Image
PubChem Substance 3729 Link Image
ChEBI ID 15641 Link Image
CAS Registry Number 134-35-0
InChI Identifier InChI=1/C20H25N7O6/c1-27-12(9-23-16-15(27)18(31)26-20(21)25-16)8-22-11-4-2-10(3-5-11)17(30)24-13(19(32)33)6-7-14(28)29/h2-5,12-13,22H,6-9H2,1H3,(H,24,30)(H,28,29)(H,32,33)(H4,21,23,25,26,31)/t12?,13-/m1/s1
Synthesis Reference Gennari, Federico. Process for producing 5-methyltetrahydrofolic acid and its salts. U.S. (1992), 6 pp.
Melting Point (Experimental) Not Available
Experimental Water Solubility Not Available Source: PhysProp
Predicted Water Solubility 0.34600002 mg/mL [Predicted by ALOGPS] Calculated using ALOGPS
Physiological Charge -2
State Solid
Experimental LogP/Hydrophobicity Not Available Source: PhysProp
Predicted LogP/Hydrophobicity -1.26 [Predicted by ALOGPS]; -2.1 [Predicted by PubChem via XLOGP] Calculated using ALOGPS
Material Safety Data Sheet (MSDS) Not Available
MOL File Show Link Image
SDF File Show Link Image
PDB File Show Link Image
2D Structure
3D Structure
Experimental PDB ID Not Available
Experimental 1H NMR Spectrum Not Available
Experimental 13C NMR Spectrum Not Available
Experimental 13C HSQC Spectrum Not Available
Predicted 1H NMR Spectrum Show Image
Show Peaklist
Predicted 13C NMR Spectrum Show Image
Show Peaklist
Mass Spectrum Not Available
Simplified TOCSY Spectrum Not Available
BMRB Spectrum Not Available
Cellular Location
  • Cytoplasm (Predicted from LogP)
  • Extracellular
Biofluid Location
  • Blood
  • Cerebrospinal Fluid
Tissue Location
Tissue References
Placenta
Concentrations (Normal)
Biofluid Blood
Value 0.3 (0.094-0.7) uM
Age Adult:>18 yrs old
Sex Both
Patient information Normal
Comments Not Available
References
  • Fazili Z, Pfeiffer CM, Zhang M, Jain RB, Koontz D: Influence of 5,10-methylenetetrahydrofolate reductase polymorphism on whole-blood folate concentrations measured by LC-MS/MS, microbiologic assay, and bio-rad radioassay. Clin Chem. 2008 Jan;54(1):197-201. [PubMed Link Image]
Biofluid CSF
Value 0.075 (0.045 - 0.13) uM
Age Adult:>18 yrs old
Sex N/A
Patient information Normal
Comments Not Available
References
  • Ormazabal A, Artuch R, Vilaseca MA, Aracil A, Pineda M: Cerebrospinal fluid concentrations of folate, biogenic amines and pterins in Rett syndrome: treatment with folinic acid. Neuropediatrics. 2005 Dec;36(6):380-5. [PubMed Link Image]
Biofluid CSF
Value 0.12 (0.04-0.20) uM
Age Adult:>18 yrs old
Sex Both
Patient information Normal
Comments Not Available
References
  • Van Hove JL, Lazeyras F, Zeisel SH, Bottiglieri T, Hyland K, Charles HC, Gray L, Jaeken J, Kahler SG: One-methyl group metabolism in non-ketotic hyperglycinaemia: mildly elevated cerebrospinal fluid homocysteine levels. J Inherit Metab Dis. 1998 Dec;21(8):799-811. [PubMed Link Image]
Concentrations (Abnormal)
Biofluid CSF
Value 0.053 (0.02 - 0.09) uM
Age Adult:>18 yrs old
Sex N/A
Condition Rett syndrome
Comments Not Available
References
  • Ormazabal A, Artuch R, Vilaseca MA, Aracil A, Pineda M: Cerebrospinal fluid concentrations of folate, biogenic amines and pterins in Rett syndrome: treatment with folinic acid. Neuropediatrics. 2005 Dec;36(6):380-5. [PubMed Link Image]
Biofluid CSF
Value 0.026 +/- 0.007 uM
Age Children:1-13 yrs old
Sex N/A
Condition AIDS
Comments Neurological complications of HIV infection
References
  • Surtees R, Hyland K, Smith I: Central-nervous-system methyl-group metabolism in children with neurological complications of HIV infection. Lancet. 1990 Mar 17;335(8690):619-21. [PubMed Link Image]
Associated Disorders
Condition References
AIDS
  • Surtees R, Hyland K, Smith I: Central-nervous-system methyl-group metabolism in children with neurological complications of HIV infection. Lancet. 1990 Mar 17;335(8690):619-21. [PubMed Link Image]
Rett syndrome
  • Ormazabal A, Artuch R, Vilaseca MA, Aracil A, Pineda M: Cerebrospinal fluid concentrations of folate, biogenic amines and pterins in Rett syndrome: treatment with folinic acid. Neuropediatrics. 2005 Dec;36(6):380-5. [PubMed Link Image]
OMIM ID
Pathways
Name SMPDB Link KEGG Link
Betaine Metabolism SMP00123 Link Image map00260 Link Image
Folate Metabolism SMP00053 Link Image map00670 Link Image
Methionine Metabolism SMP00033 Link Image map00270 Link Image
General References
  1. Garbis SD, Melse-Boonstra A, West CE, van Breemen RB: Determination of folates in human plasma using hydrophilic interaction chromatography-tandem mass spectrometry. Anal Chem. 2001 Nov 15;73(22):5358-64. [PubMed Link Image]
  2. Ormazabal A, Artuch R, Vilaseca MA, Aracil A, Pineda M: Cerebrospinal fluid concentrations of folate, biogenic amines and pterins in Rett syndrome: treatment with folinic acid. Neuropediatrics. 2005 Dec;36(6):380-5. [PubMed Link Image]
  3. Chladek J, Sispera L, Martinkova J: High-performance liquid chromatographic assay for the determination of 5-methyltetrahydrofolate in human plasma. J Chromatogr B Biomed Sci Appl. 2000 Jul 21;744(2):307-13. [PubMed Link Image]
  4. Prasad PD, Mahesh VB, Leibach FH, Ganapathy V: Functional coupling between a bafilomycin A1-sensitive proton pump and a probenecid-sensitive folate transporter in human placental choriocarcinoma cells. Biochim Biophys Acta. 1994 Jun 30;1222(2):309-14. [PubMed Link Image]
  5. Kim TH, Yang J, Darling PB, O'Connor DL: A large pool of available folate exists in the large intestine of human infants and piglets. J Nutr. 2004 Jun;134(6):1389-94. [PubMed Link Image]
  6. Camilo E, Zimmerman J, Mason JB, Golner B, Russell R, Selhub J, Rosenberg IH: Folate synthesized by bacteria in the human upper small intestine is assimilated by the host. Gastroenterology. 1996 Apr;110(4):991-8. [PubMed Link Image]
  7. Kamen BA, Smith AK: A review of folate receptor alpha cycling and 5-methyltetrahydrofolate accumulation with an emphasis on cell models in vitro. Adv Drug Deliv Rev. 2004 Apr 29;56(8):1085-97. [PubMed Link Image]
  8. Surtees R, Leonard J, Austin S: Association of demyelination with deficiency of cerebrospinal-fluid S-adenosylmethionine in inborn errors of methyl-transfer pathway. Lancet. 1991 Dec 21-28;338(8782-8783):1550-4. [PubMed Link Image]
  9. Surtees R, Hyland K, Smith I: Central-nervous-system methyl-group metabolism in children with neurological complications of HIV infection. Lancet. 1990 Mar 17;335(8690):619-21. [PubMed Link Image]
  10. Evans MI, Duquette DA, Rinaldo P, Bawle E, Rosenblatt DS, Whitty J, Quintero RA, Johnson MP: Modulation of B12 dosage and response in fetal treatment of methylmalonic aciduria (MMA): titration of treatment dose to serum and urine MMA. Fetal Diagn Ther. 1997 Jan-Feb;12(1):21-3. [PubMed Link Image]
  11. Kane MA, Roth E, Raptis G, Schreiber C, Waxman S: Effect of intracellular folate concentration on the modulation of 5-fluorouracil cytotoxicity by the elevation of phosphoribosylpyrophosphate in cultured human KB cells. Cancer Res. 1987 Dec 15;47(24 Pt 1):6444-50. [PubMed Link Image]
  12. Irizarry MC: Biomarkers of Alzheimer disease in plasma. NeuroRx. 2004 Apr;1(2):226-34. [PubMed Link Image]
  13. Van Hove JL, Lazeyras F, Zeisel SH, Bottiglieri T, Hyland K, Charles HC, Gray L, Jaeken J, Kahler SG: One-methyl group metabolism in non-ketotic hyperglycinaemia: mildly elevated cerebrospinal fluid homocysteine levels. J Inherit Metab Dis. 1998 Dec;21(8):799-811. [PubMed Link Image]
  14. Straw JA, Szapary D, Wynn WT: Pharmacokinetics of the diastereoisomers of leucovorin after intravenous and oral administration to normal subjects. Cancer Res. 1984 Jul;44(7):3114-9. [PubMed Link Image]
  15. Wikipedia Link Image
Metabolic Enzymes
  1. Methionine synthase
  2. Methylenetetrahydrofolate reductase
Enzyme 1 [top]
Enzyme 1 ID 5392
Enzyme 1 Name Methionine synthase
Enzyme 1 Synonyms
  1. 5-methyltetrahydrofolate--homocysteine methyltransferase
  2. Vitamin-B12 dependent methionine synthase
  3. MS
Enzyme 1 Gene Name MTR
Enzyme 1 Protein Sequence >Methionine synthase
MSPALQDLSQPEGLKKTLRDEINAILQKRIMVLDGGMGTMIQREKLNEEHFRGQEFKDHA
RPLKGNNDILSITQPDVIYQIHKEYLLAGADIIETNTFSSTSIAQADYGLEHLAYRMNMC
SAGVARKAAEEVTLQTGIKRFVAGALGPTNKTLSVSPSVERPDYRNITFDELVEAYQEQA
KGLLDGGVDILLIETIFDTANAKAALFALQNLFEEKYAPRPIFISGTIVDKSGRTLSGQT
GEGFVISVSHGEPLCIGLNCALGAAEMRPFIEIIGKCTTAYVLCYPNAGLPNTFGDYDET
PSMMAKHLKDFAMDGLVNIVGGCCGSTPDHIREIAEAVKNCKPRVPPATAFEGHMLLSGL
EPFRIGPYTNFVNIGERCNVAGSRKFAKLIMAGNYEEALCVAKVQVEMGAQVLDVNMDDG
MLDGPSAMTRFCNLIASEPDIAKVPLCIDSSNFAVIEAGLKCCQGKCIVNSISLKEGEDD
FLEKARKIKKYGAAMVVMAFDEEGQATETDTKIRVCTRAYHLLVKKLGFNPNDIIFDPNI
LTIGTGMEEHNLYAINFIHATKVIKETLPGARISGGLSNLSFSFRGMEAIREAMHGVFLY
HAIKSGMDMGIVNAGNLPVYDDIHKELLQLCEDLIWNKDPEATEKLLRYAQTQGTGGKKV
IQTDEWRNGPVEERLEYALVKGIEKHIIEDTEEARLNQKKYPRPLNIIEGPLMNGMKIVG
DLFGAGKMFLPQVIKSARVMKKAVGHLIPFMEKEREETRVLNGTVEEEDPYQGTIVLATV
KGDVHDIGKNIVGVVLGCNNFRVIDLGVMTPCDKILKAALDHKADIIGLSGLITPSLDEM
IFVAKEMERLAIRIPLLIGGATTSKTHTAVKIAPRYSAPVIHVLDASKSVVVCSQLLDEN
LKDEYFEEIMEEYEDIRQDHYESLKERRYLPLSQARKSGFQMDWLSEPHPVKPTFIGTQV
FEDYDLQKLVDYIDWKPFFDVWQLRGKYPNRGFPKIFNDKTVGGEARKVYDDAHNMLNTL
ISQKKLRARGVVGFWPAQSIQDDIHLYAEAAVPQAAEPIATFYGLRQQAEKDSASTEPYY
CLSDFIAPLHSGIRDYLGLFAVACFGVEELSKAYEDDGDDYSSIMVKALGDRLAEAFAEE
LHERVRRELWAYCGSEQLDVADLRRLRYKGIRPAPGYPSQPDHTEKLTMWRLADIEQSTG
IRLTESLAMAPASAVSGLYFSNLKSKYFAVGKISKDQVEDYALRKNISVAEVEKWLGPIL
GYDTD
Enzyme 1 Number of Residues 1265
Enzyme 1 Molecular Weight 140525.9
Enzyme 1 Theoretical pI 5.27
Enzyme 1 GO Classification
Function
  • S-methyltransferase activity
  • binding
  • catalytic activity
  • cation binding
  • cobalamin binding
  • homocysteine S-methyltransferase activity
  • ion binding
  • metal ion binding
  • methionine synthase activity
  • methyltransferase activity
  • transferase activity
  • transferase activity, transferring one-carbon groups
  • transition metal ion binding
  • vitamin binding
  • zinc ion binding
Process
  • cellular amino acid and derivative metabolic process
  • cellular amino acid metabolic process
  • cellular aromatic compound metabolic process
  • cellular metabolic process
  • metabolic process
  • methionine biosynthetic process
  • pteridine and derivative metabolic process
  • sulfur amino acid biosynthetic process
  • sulfur amino acid metabolic process
Component
  • cell part
  • intracellular
Enzyme 1 General Function Involved in cobalamin binding
Enzyme 1 Specific Function Catalyzes the transfer of a methyl group from methyl- cobalamin to homocysteine, yielding enzyme-bound cob(I)alamin and methionine. Subsequently, remethylates the cofactor using methyltetrahydrofolate
Enzyme 1 Pathways
Enzyme 1 Reactions
  • 5-methyltetrahydrofolate + L-homocysteine = tetrahydrofolate + L-methionine [RN:R00946]
Enzyme 1 Pfam Domain Function
Enzyme 1 Signals
  • None
Enzyme 1 Transmembrane Regions
  • None
Enzyme 1 Essentiality Not Available
Enzyme 1 GenBank ID Protein Not Available
Enzyme 1 UniProtKB/Swiss-Prot ID Q99707 Link Image
Enzyme 1 UniProtKB/Swiss-Prot Entry Name METH_HUMAN Link Image
Enzyme 1 PDB ID Not Available
Enzyme 1 Cellular Location Not Available
Enzyme 1 Gene Sequence >3798 bp
ATGTCACCCGCGCTCCAAGACCTGTCGCAACCCGAAGGTCTGAAGAAAACCCTGCGGGAT
GAGATCAATGCCATTCTGCAGAAGAGGATTATGGTGCTGGATGGAGGGATGGGGACCATG
ATCCAGCGGGAGAAGCTAAACGAAGAACACTTCCGAGGTCAGGAATTTAAAGATCATGCC
AGGCCGCTGAAAGGCAACAATGACATTTTAAGTATAACTCAGCCTGATGTCATTTACCAA
ATCCATAAGGAATACTTGCTGGCTGGGGCAGATATCATTGAAACAAATACTTTTAGCAGC
ACTAGTATTGCCCAAGCTGACTATGGCCTTGAACACTTGGCCTACCGGATGAACATGTGC
TCTGCAGGAGTGGCCAGAAAAGCTGCCGAGGAGGTAACTCTCCAGACAGGAATTAAGAGG
TTTGTGGCAGGGGCTCTGGGTCCGACTAATAAGACACTCTCTGTGTCCCCATCTGTGGAA
AGGCCGGATTATAGGAACATCACATTTGATGAGCTTGTTGAAGCATACCAAGAGCAGGCC
AAAGGACTTCTGGATGGCGGGGTTGATATCTTACTCATTGAAACTATTTTTGATACTGCC
AATGCCAAGGCAGCCTTGTTTGCACTCCAAAATCTTTTTGAGGAGAAATATGCTCCCCGG
CCTATCTTTATTTCAGGGACGATCGTTGATAAAAGTGGGCGGACTCTTTCCGGACAGACA
GGAGAGGGATTTGTCATCAGCGTGTCTCATGGAGAACCACTCTGCATTGGATTAAATTGT
GCTTTGGGTGCAGCTGAGATGAGACCTTTTATTGAAATAATTGGAAAATGTACAACAGCC
TATGTCCTCTGTTATCCCAATGCAGGTCTTCCCAACACCTTTGGTGACTATGATGAAACG
CCTTCTATGATGGCCAAGCACCTAAAGGATTTTGCTATGGATGGCTTGGTCAATATAGTT
GGAGGATGCTGTGGGTCAACACCAGATCATATCAGGGAAATTGCTGAAGCTGTGAAAAAT
TGTAAGCCTAGAGTTCCACCTGCCACTGCTTTTGAAGGACATATGTTACTGTCTGGTCTA
GAGCCCTTCAGGATTGGACCGTACACCAACTTTGTTAACATTGGAGAGCGCTGTAATGTT
GCAGGATCAAGGAAGTTTGCTAAACTCATCATGGCAGGAAACTATGAAGAAGCCTTGTGT
GTTGCCAAAGTGCAGGTGGAAATGGGAGCCCAGGTGTTGGATGTCAACATGGATGATGGC
ATGCTAGATGGTCCAAGTGCAATGACCAGATTTTGCAACTTAATTGCTTCCGAGCCAGAC
ATCGCAAAGGTACCTTTGTGCATCGACTCCTCCAATTTTGCTGTGATTGAAGCTGGGTTA
AAGTGCTGCCAAGGGAAGTGCATTGTCAATAGCATTAGTCTGAAGGAAGGAGAGGACGAC
TTCTTGGAGAAGGCCAGGAAGATTAAAAAGTATGGAGCTGCTATGGTGGTCATGGCTTTT
GATGAAGAAGGACAGGCAACAGAAACAGACACAAAAATCAGAGTGTGCACCCGGGCCTAC
CATCTGCTTGTGAAAAAACTGGGCTTTAATCCAAATGACATTATTTTTGACCCTAATATC
CTAACCATTGGGACTGGAATGGAGGAACACAACTTGTATGCCATTAATTTTATCCATGCA
ACAAAAGTCATTAAAGAAACATTACCTGGAGCCAGAATAAGTGGAGGTCTTTCCAACTTG
TCCTTCTCCTTCCGAGGAATGGAAGCCATTCGAGAAGCAATGCATGGGGTTTTCCTTTAC
CATGCAATCAAGTCTGGCATGGACATGGGGATAGTGAATGCTGGAAACCTCCCTGTGTAT
GATGATATCCATAAGGAACTTCTGCAGCTCTGTGAAGATCTCATCTGGAATAAAGACCCT
GAGGCCACTGAGAAGCTCTTACGTTATGCCCAGACTCAAGGCACAGGAGGGAAGAAAGTC
ATTCAGACTGATGAGTGGAGAAATGGCCCTGTCGAAGAACGCCTTGAGTATGCCCTTGTG
AAGGGCATTGAAAAACATATTATTGAGGATACTGAGGAAGCCAGGTTAAACCAAAAAAAA
TATCCCCGACCTCTCAATATAATTGAAGGACCCCTGATGAATGGAATGAAAATTGTTGGT
GATCTTTTTGGAGCTGGAAAAATGTTTCTACCTCAGGTTATAAAGTCAGCCCGGGTTATG
AAGAAGGCTGTTGGCCACCTTATCCCTTTCATGGAAAAAGAAAGAGAAGAAACCAGAGTG
CTTAACGGCACAGTAGAAGAAGAGGACCCTTACCAGGGCACCATCGTGCTGGCCACTGTT
AAAGGCGACGTGCACGACATAGGCAAGAACATAGTTGGAGTAGTCCTTGGCTGCAATAAT
TTCCGAGTTATTGATTTAGGAGTCATGACTCCATGTGATAAGATACTGAAAGCTGCTCTT
GACCACAAAGCAGATATAATTGGCCTGTCAGGACTCATCACTCCTTCCCTGGATGAAATG
ATTTTTGTTGCCAAGGAAATGGAGAGATTAGCTATAAGGATTCCATTGTTGATTGGAGGA
GCAACCACTTCAAAAACCCACACAGCAGTTAAAATAGCTCCGAGATACAGTGCACCTGTA
ATCCATGTCCTGGACGCGTCCAAGAGTGTGGTGGTGTGTTCCCAGCTGTTAGATGAAAAT
CTAAAGGATGAATACTTTGAGGAAATCATGGAAGAATATGAAGATATTAGACAGGACCAT
TATGAGTCTCTCAAGGAGAGGAGATACTTACCCTTAAGTCAAGCCAGAAAAAGTGGTTTC
CAAATGGATTGGCTGTCTGAACCTCACCCAGTGAAGCCCACGTTTATTGGGACCCAGGTC
TTTGAAGACTATGACCTGCAGAAGCTGGTGGACTACATTGACTGGAAGCCTTTCTTTGAT
GTCTGGCAGCTCCGGGGCAAGTACCCGAATCGAGGCTTCCCCAAGATATTTAACGACAAA
ACAGTAGGTGGAGAGGCCAGGAAGGTCTACGATGATGCCCACAATATGCTGAACACACTG
ATTAGTCAAAAGAAACTCCGGGCCCGGGGTGTGGTTGGGTTCTGGCCAGCACAGAGTATC
CAAGACGACATTCACCTGTACGCAGAGGCTGCTGTGCCCCAGGCTGCAGAGCCCATAGCC
ACTTTCTATGGGTTAAGGCAACAGGCTGAGAAGGACTCTGCCAGCACGGAGCCATACTAC
TGCCTCTCAGACTTCATCGCTCCCTTGCATTCTGGCATCCGTGACTACCTGGGCCTGTTT
GCCGTTGCCTGCTTTGGGGTAGAAGAGCTGAGCAAGGCCTATGAGGATGATGGTGACGAC
TACAGCAGCATCATGGTCAAGGCGCTGGGGGACCGGCTGGCAGAGGCCTTTGCAGAAGAG
CTCCATGAAAGAGTTCGCCGAGAACTGTGGGCCTACTGTGGCAGTGAGCAGCTGGACGTC
GCAGACCTGCGAAGGTTGCGGTACAAGGGCATCCGCCCGGCTCCTGGCTACCCCAGCCAG
CCCGACCACACCGAGAAGCTCACCATGTGGAGACTCGCAGACATCGAGCAGTCTACAGGC
ATTAGGTTAACAGAATCATTAGCAATGGCACCTGCTTCAGCAGTCTCAGGCCTCTACTTC
TCCAATTTGAAGTCCAAATATTTTGCTGTGGGGAAGATTTCCAAGGATCAGGTTGAGGAT
TATGCATTGAGGAAGAACATATCTGTGGCTGAGGTTGAGAAATGGCTTGGACCCATTTTG
GGATATGATACAGACTAA
Enzyme 1 GenBank Gene ID U71285 Link Image
Enzyme 1 GeneCard ID MTR Link Image
Enzyme 1 GenAtlas ID MTR Link Image
Enzyme 1 HGNC ID HGNC:7468 Link Image
Enzyme 1 Chromosome Location 1
Enzyme 1 Locus 1q43
Enzyme 1 SNPs SNPJam Report Link Image
Enzyme 1 General References
  1. Leclerc D, Campeau E, Goyette P, Adjalla CE, Christensen B, Ross M, Eydoux P, Rosenblatt DS, Rozen R, Gravel RA: Human methionine synthase: cDNA cloning and identification of mutations in patients of the cblG complementation group of folate/cobalamin disorders. Hum Mol Genet. 1996 Dec;5(12):1867-74. [PubMed Link Image]
  2. Li YN, Gulati S, Baker PJ, Brody LC, Banerjee R, Kruger WD: Cloning, mapping and RNA analysis of the human methionine synthase gene. Hum Mol Genet. 1996 Dec;5(12):1851-8. [PubMed Link Image]
  3. Chen LH, Liu ML, Hwang HY, Chen LS, Korenberg J, Shane B: Human methionine synthase. cDNA cloning, gene localization, and expression. J Biol Chem. 1997 Feb 7;272(6):3628-34. [PubMed Link Image]
  4. Gregory SG, Barlow KF, McLay KE, Kaul R, Swarbreck D, Dunham A, Scott CE, Howe KL, Woodfine K, Spencer CC, Jones MC, Gillson C, Searle S, Zhou Y, Kokocinski F, McDonald L, Evans R, Phillips K, Atkinson A, Cooper R, Jones C, Hall RE, Andrews TD, Lloyd C, Ainscough R, Almeida JP, Ambrose KD, Anderson F, Andrew RW, Ashwell RI, Aubin K, Babbage AK, Bagguley CL, Bailey J, Beasley H, Bethel G, Bird CP, Bray-Allen S, Brown JY, Brown AJ, Buckley D, Burton J, Bye J, Carder C, Chapman JC, Clark SY, Clarke G, Clee C, Cobley V, Collier RE, Corby N, Coville GJ, Davies J, Deadman R, Dunn M, Earthrowl M, Ellington AG, Errington H, Frankish A, Frankland J, French L, Garner P, Garnett J, Gay L, Ghori MR, Gibson R, Gilby LM, Gillett W, Glithero RJ, Grafham DV, Griffiths C, Griffiths-Jones S, Grocock R, Hammond S, Harrison ES, Hart E, Haugen E, Heath PD, Holmes S, Holt K, Howden PJ, Hunt AR, Hunt SE, Hunter G, Isherwood J, James R, Johnson C, Johnson D, Joy A, Kay M, Kershaw JK, Kibukawa M, Kimberley AM, King A, Knights AJ, Lad H, Laird G, Lawlor S, Leongamornlert DA, Lloyd DM, Loveland J, Lovell J, Lush MJ, Lyne R, Martin S, Mashreghi-Mohammadi M, Matthews L, Matthews NS, McLaren S, Milne S, Mistry S, Moore MJ, Nickerson T, O'Dell CN, Oliver K, Palmeiri A, Palmer SA, Parker A, Patel D, Pearce AV, Peck AI, Pelan S, Phelps K, Phillimore BJ, Plumb R, Rajan J, Raymond C, Rouse G, Saenphimmachak C, Sehra HK, Sheridan E, Shownkeen R, Sims S, Skuce CD, Smith M, Steward C, Subramanian S, Sycamore N, Tracey A, Tromans A, Van Helmond Z, Wall M, Wallis JM, White S, Whitehead SL, Wilkinson JE, Willey DL, Williams H, Wilming L, Wray PW, Wu Z, Coulson A, Vaudin M, Sulston JE, Durbin R, Hubbard T, Wooster R, Dunham I, Carter NP, McVean G, Ross MT, Harrow J, Olson MV, Beck S, Rogers J, Bentley DR, Banerjee R, Bryant SP, Burford DC, Burrill WD, Clegg SM, Dhami P, Dovey O, Faulkner LM, Gribble SM, Langford CF, Pandian RD, Porter KM, Prigmore E: The DNA sequence and biological annotation of human chromosome 1. Nature. 2006 May 18;441(7091):315-21. [PubMed Link Image]
  5. Gerhard DS, Wagner L, Feingold EA, Shenmen CM, Grouse LH, Schuler G, Klein SL, Old S, Rasooly R, Good P, Guyer M, Peck AM, Derge JG, Lipman D, Collins FS, Jang W, Sherry S, Feolo M, Misquitta L, Lee E, Rotmistrovsky K, Greenhut SF, Schaefer CF, Buetow K, Bonner TI, Haussler D, Kent J, Kiekhaus M, Furey T, Brent M, Prange C, Schreiber K, Shapiro N, Bhat NK, Hopkins RF, Hsie F, Driscoll T, Soares MB, Casavant TL, Scheetz TE, Brown-stein MJ, Usdin TB, Toshiyuki S, Carninci P, Piao Y, Dudekula DB, Ko MS, Kawakami K, Suzuki Y, Sugano S, Gruber CE, Smith MR, Simmons B, Moore T, Waterman R, Johnson SL, Ruan Y, Wei CL, Mathavan S, Gunaratne PH, Wu J, Garcia AM, Hulyk SW, Fuh E, Yuan Y, Sneed A, Kowis C, Hodgson A, Muzny DM, McPherson J, Gibbs RA, Fahey J, Helton E, Ketteman M, Madan A, Rodrigues S, Sanchez A, Whiting M, Madari A, Young AC, Wetherby KD, Granite SJ, Kwong PN, Brinkley CP, Pearson RL, Bouffard GG, Blakesly RW, Green ED, Dickson MC, Rodriguez AC, Grimwood J, Schmutz J, Myers RM, Butterfield YS, Griffith M, Griffith OL, Krzywinski MI, Liao N, Morin R, Palmquist D, Petrescu AS, Skalska U, Smailus DE, Stott JM, Schnerch A, Schein JE, Jones SJ, Holt RA, Baross A, Marra MA, Clifton S, Makowski KA, Bosak S, Malek J: The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC). Genome Res. 2004 Oct;14(10B):2121-7. [PubMed Link Image]
  6. Gulati S, Baker P, Li YN, Fowler B, Kruger W, Brody LC, Banerjee R: Defects in human methionine synthase in cblG patients. Hum Mol Genet. 1996 Dec;5(12):1859-65. [PubMed Link Image]
  7. Doolin MT, Barbaux S, McDonnell M, Hoess K, Whitehead AS, Mitchell LE: Maternal genetic effects, exerted by genes involved in homocysteine remethylation, influence the risk of spina bifida. Am J Hum Genet. 2002 Nov;71(5):1222-6. Epub 2002 Oct 9. [PubMed Link Image]
  8. O'Leary VB, Mills JL, Pangilinan F, Kirke PN, Cox C, Conley M, Weiler A, Peng K, Shane B, Scott JM, Parle-McDermott A, Molloy AM, Brody LC: Analysis of methionine synthase reductase polymorphisms for neural tube defects risk association. Mol Genet Metab. 2005 Jul;85(3):220-7. Epub 2005 Mar 17. [PubMed Link Image]
Enzyme 1 Metabolite References Not Available
Enzyme 2 [top]
Enzyme 2 ID 5420
Enzyme 2 Name Methylenetetrahydrofolate reductase
Enzyme 2 Synonyms Not Available
Enzyme 2 Gene Name MTHFR
Enzyme 2 Protein Sequence >Methylenetetrahydrofolate reductase
MVNEARGNSSLNPCLEGSASSGSESSKDSSRCSTPGLDPERHERLREKMRRRLESGDKWF
SLEFFPPRTAEGAVNLISRFDRMAAGGPLYIDVTWHPAGDPGSDKETSSMMIASTAVNYC
GLETILHMTCCRQRLEEITGHLHKAKQLGLKNIMALRGDPIGDQWEEEEGGFNYAVDLVK
HIRSEFGDYFDICVAGYPKGHPEAGSFEADLKHLKEKVSAGADFIITQLFFEADTFFRFV
KACTDMGITCPIVPGIFPIQGYHSLRQLVKLSKLEVPQEIKDVIEPIKDNDAAIRNYGIE
LAVSLCQELLASGLVPGLHFYTLNREMATTEVLKRLGMWTEDPRRPLPWALSAHPKRREE
DVRPIFWASRPKSYIYRTQEWDEFPNGRWGNSSSPAFGELKDYYLFYLKSKSPKEELLKM
WGEELTSEESVFEVFVLYLSGEPNRNGHKVTCLPWNDEPLAAETSLLKEELLRVNRQGIL
TINSQPNINGKPSSDPIVGWGPSGGYVFQKAYLEFFTSRETAEALLQVLKKYELRVNYHL
VNVKGENITNAPELQPNAVTWGIFPGREIIQPTVVDPVSFMFWKDEAFALWIERWGKLYE
EESPSRTIIQYIHDNYFLVNLVDNDFPLDNCLWQVVEDTLELLNRPTQNARETEAP
Enzyme 2 Number of Residues 656
Enzyme 2 Molecular Weight 74595.9
Enzyme 2 Theoretical pI 5.00
Enzyme 2 GO Classification
Function
  • catalytic activity
  • methylenetetrahydrofolate reductase (NADPH) activity
  • methylenetetrahydrofolate reductase (NADPH) activity
  • oxidoreductase activity
  • oxidoreductase activity, acting on the CH-NH group of donors
  • oxidoreductase activity, acting on the CH-NH group of donors, NAD or NADP as acceptor
Process
  • cellular amino acid and derivative metabolic process
  • cellular amino acid metabolic process
  • cellular metabolic process
  • metabolic process
  • methionine metabolic process
  • oxidation reduction
  • sulfur amino acid metabolic process
Component
Enzyme 2 General Function Involved in methylenetetrahydrofolate reductase (NADPH) activity
Enzyme 2 Specific Function Catalyzes the conversion of 5,10- methylenetetrahydrofolate to 5-methyltetrahydrofolate, a co- substrate for homocysteine remethylation to methionine
Enzyme 2 Pathways
Enzyme 2 Reactions
  • 5-methyltetrahydrofolate + NAD(P)+ = 5,10-methylenetetrahydrofolate + NAD(P)H + H+ [RN:R01224 R07168]
Enzyme 2 Pfam Domain Function
Enzyme 2 Signals
  • None
Enzyme 2 Transmembrane Regions
  • None
Enzyme 2 Essentiality Not Available
Enzyme 2 GenBank ID Protein 6139053 Link Image
Enzyme 2 UniProtKB/Swiss-Prot ID P42898 Link Image
Enzyme 2 UniProtKB/Swiss-Prot Entry Name MTHR_HUMAN Link Image
Enzyme 2 PDB ID Not Available
Enzyme 2 Cellular Location Not Available
Enzyme 2 Gene Sequence >1971 bp
ATGGTGAACGAAGCCAGAGGAAACAGCAGCCTCAACCCCTGCTTGGAGGGCAGTGCCAGC
AGTGGCAGTGAGAGCTCCAAAGATAGTTCGAGATGTTCCACCCCGGGCCTGGACCCTGAG
CGGCATGAGAGACTCCGGGAGAAGATGAGGCGGCGATTGGAATCTGGTGACAAGTGGTTC
TCCCTGGAATTCTTCCCTCCTCGAACTGCTGAGGGAGCTGTCAATCTCATCTCAAGGTTT
GACCGGATGGCAGCAGGTGGCCCCCTCTACATAGACGTGACCTGGCACCCAGCAGGTGAC
CCTGGCTCAGACAAGGAGACCTCCTCCATGATGATCGCCAGCACCGCCGTGAACTACTGT
GGCCTGGAGACCATCCTGCACATGACCTGCTGCCGTCAGCGCCTGGAGGAGATCACGGGC
CATCTGCACAAAGCTAAGCAGCTGGGCCTGAAGAACATCATGGCGCTGCGGGGAGACCCA
ATAGGTGACCAGTGGGAAGAGGAGGAGGGAGGCTTCAACTACGCAGTGGACCTGGTGAAG
CACATCCGAAGTGAGTTTGGTGACTACTTTGACATCTGTGTGGCAGGTTACCCCAAAGGC
CACCCCGAAGCAGGGAGCTTTGAGGCTGACCTGAAGCACTTGAAGGAGAAGGTGTCTGCG
GGAGCCGATTTCATCATCACGCAGCTTTTCTTTGAGGCTGACACATTCTTCCGCTTTGTG
AAGGCATGCACCGACATGGGCATCACTTGCCCCATCGTCCCCGGGATCTTTCCCATCCAG
GGCTACCACTCCCTTCGGCAGCTTGTGAAGCTGTCCAAGCTGGAGGTGCCACAGGAGATC
AAGGACGTGATTGAGCCAATCAAAGACAACGATGCTGCCATCCGCAACTATGGCATCGAG
CTGGCCGTGAGCCTGTGCCAGGAGCTTCTGGCCAGTGGCTTGGTGCCAGGCCTCCACTTC
TACACCCTCAACCGCGAGATGGCTACCACAGAGGTGCTGAAGCGCCTGGGGATGTGGACT
GAGGACCCCAGGCGTCCCCTACCCTGGGCTCTCAGTGCCCACCCCAAGCGCCGAGAGGAA
GATGTACGTCCCATCTTCTGGGCCTCCAGACCAAAGAGTTACATCTACCGTACCCAGGAG
TGGGACGAGTTCCCTAACGGCCGCTGGGGCAATTCCTCTTCCCCTGCCTTTGGGGAGCTG
AAGGACTACTACCTCTTCTACCTGAAGAGCAAGTCCCCCAAGGAGGAGCTGCTGAAGATG
TGGGGGGAGGAGCTGACCAGTGAAGCAAGTGTCTTTGAAGTCTTTGTTCTTTACCTCTCG
GGAGAACCAAACCGGAATGGTCACAAAGTGACTTGCCTGCCCTGGAACGATGAGCCCCTG
GCGGCTGAGACCAGCCTGCTGAAGGAGGAGCTGCTGCGGGTGAACCGCCAGGGCATCCTC
ACCATCAACTCACAGCCCAACATCAACGGGAAGCCGTCCTCCGACCCCATCGTGGGCTGG
GGCCCCAGCGGGGGCTATGTCTTCCAGAAGGCCTACTTAGAGTTTTTCACTTCCCGCGAG
ACAGCGGAAGCACTTCTGCAAGTGCTGAAGAAGTACGAGCTCCGGGTTAATTACCACCTT
GTCAATGTGAAGGGTGAAAACATCACCAATGCCCCTGAACTGCAGCCGAATGCTGTCACT
TGGGGCATCTTCCCTGGGCGAGAGATCATCCAGCCCACCGTAGTGGATCCCGTCAGCTTC
ATGTTCTGGAAGGACGAGGCCTTTGCCCTGTGGATTGAGCGGTGGGGAAAGCTGTATGAG
GAGGAGTCCCCGTCCCGCACCATCATCCAGTACATCCACGACAACTACTTCCTGGTCAAC
CTGGTGGACAATGACTTCCCACTGGACAACTGCCTCTGGCAGGTGGTGGAAGACACATTG
GAGCTTCTCAACAGGCCCACCCAGAATGCGAGAGAAACGGAGGCTCCATGA
Enzyme 2 GenBank Gene ID U09806 Link Image
Enzyme 2 GeneCard ID MTHFR Link Image
Enzyme 2 GenAtlas ID MTHFR Link Image
Enzyme 2 HGNC ID HGNC:7436 Link Image
Enzyme 2 Chromosome Location 1
Enzyme 2 Locus 1p36.3
Enzyme 2 SNPs SNPJam Report Link Image
Enzyme 2 General References
  1. Goyette P, Pai A, Milos R, Frosst P, Tran P, Chen Z, Chan M, Rozen R: Gene structure of human and mouse methylenetetrahydrofolate reductase (MTHFR) Mamm Genome. 1998 Aug;9(8):652-6. [PubMed Link Image]
  2. Ota T, Suzuki Y, Nishikawa T, Otsuki T, Sugiyama T, Irie R, Wakamatsu A, Hayashi K, Sato H, Nagai K, Kimura K, Makita H, Sekine M, Obayashi M, Nishi T, Shibahara T, Tanaka T, Ishii S, Yamamoto J, Saito K, Kawai Y, Isono Y, Nakamura Y, Nagahari K, Murakami K, Yasuda T, Iwayanagi T, Wagatsuma M, Shiratori A, Sudo H, Hosoiri T, Kaku Y, Kodaira H, Kondo H, Sugawara M, Takahashi M, Kanda K, Yokoi T, Furuya T, Kikkawa E, Omura Y, Abe K, Kamihara K, Katsuta N, Sato K, Tanikawa M, Yamazaki M, Ninomiya K, Ishibashi T, Yamashita H, Murakawa K, Fujimori K, Tanai H, Kimata M, Watanabe M, Hiraoka S, Chiba Y, Ishida S, Ono Y, Takiguchi S, Watanabe S, Yosida M, Hotuta T, Kusano J, Kanehori K, Takahashi-Fujii A, Hara H, Tanase TO, Nomura Y, Togiya S, Komai F, Hara R, Takeuchi K, Arita M, Imose N, Musashino K, Yuuki H, Oshima A, Sasaki N, Aotsuka S, Yoshikawa Y, Matsunawa H, Ichihara T, Shiohata N, Sano S, Moriya S, Momiyama H, Satoh N, Takami S, Terashima Y, Suzuki O, Nakagawa S, Senoh A, Mizoguchi H, Goto Y, Shimizu F, Wakebe H, Hishigaki H, Watanabe T, Sugiyama A, Takemoto M, Kawakami B, Yamazaki M, Watanabe K, Kumagai A, Itakura S, Fukuzumi Y, Fujimori Y, Komiyama M, Tashiro H, Tanigami A, Fujiwara T, Ono T, Yamada K, Fujii Y, Ozaki K, Hirao M, Ohmori Y, Kawabata A, Hikiji T, Kobatake N, Inagaki H, Ikema Y, Okamoto S, Okitani R, Kawakami T, Noguchi S, Itoh T, Shigeta K, Senba T, Matsumura K, Nakajima Y, Mizuno T, Morinaga M, Sasaki M, Togashi T, Oyama M, Hata H, Watanabe M, Komatsu T, Mizushima-Sugano J, Satoh T, Shirai Y, Takahashi Y, Nakagawa K, Okumura K, Nagase T, Nomura N, Kikuchi H, Masuho Y, Yamashita R, Nakai K, Yada T, Nakamura Y, Ohara O, Isogai T, Sugano S: Complete sequencing and characterization of 21,243 full-length human cDNAs. Nat Genet. 2004 Jan;36(1):40-5. Epub 2003 Dec 21. [PubMed Link Image]
  3. Gregory SG, Barlow KF, McLay KE, Kaul R, Swarbreck D, Dunham A, Scott CE, Howe KL, Woodfine K, Spencer CC, Jones MC, Gillson C, Searle S, Zhou Y, Kokocinski F, McDonald L, Evans R, Phillips K, Atkinson A, Cooper R, Jones C, Hall RE, Andrews TD, Lloyd C, Ainscough R, Almeida JP, Ambrose KD, Anderson F, Andrew RW, Ashwell RI, Aubin K, Babbage AK, Bagguley CL, Bailey J, Beasley H, Bethel G, Bird CP, Bray-Allen S, Brown JY, Brown AJ, Buckley D, Burton J, Bye J, Carder C, Chapman JC, Clark SY, Clarke G, Clee C, Cobley V, Collier RE, Corby N, Coville GJ, Davies J, Deadman R, Dunn M, Earthrowl M, Ellington AG, Errington H, Frankish A, Frankland J, French L, Garner P, Garnett J, Gay L, Ghori MR, Gibson R, Gilby LM, Gillett W, Glithero RJ, Grafham DV, Griffiths C, Griffiths-Jones S, Grocock R, Hammond S, Harrison ES, Hart E, Haugen E, Heath PD, Holmes S, Holt K, Howden PJ, Hunt AR, Hunt SE, Hunter G, Isherwood J, James R, Johnson C, Johnson D, Joy A, Kay M, Kershaw JK, Kibukawa M, Kimberley AM, King A, Knights AJ, Lad H, Laird G, Lawlor S, Leongamornlert DA, Lloyd DM, Loveland J, Lovell J, Lush MJ, Lyne R, Martin S, Mashreghi-Mohammadi M, Matthews L, Matthews NS, McLaren S, Milne S, Mistry S, Moore MJ, Nickerson T, O'Dell CN, Oliver K, Palmeiri A, Palmer SA, Parker A, Patel D, Pearce AV, Peck AI, Pelan S, Phelps K, Phillimore BJ, Plumb R, Rajan J, Raymond C, Rouse G, Saenphimmachak C, Sehra HK, Sheridan E, Shownkeen R, Sims S, Skuce CD, Smith M, Steward C, Subramanian S, Sycamore N, Tracey A, Tromans A, Van Helmond Z, Wall M, Wallis JM, White S, Whitehead SL, Wilkinson JE, Willey DL, Williams H, Wilming L, Wray PW, Wu Z, Coulson A, Vaudin M, Sulston JE, Durbin R, Hubbard T, Wooster R, Dunham I, Carter NP, McVean G, Ross MT, Harrow J, Olson MV, Beck S, Rogers J, Bentley DR, Banerjee R, Bryant SP, Burford DC, Burrill WD, Clegg SM, Dhami P, Dovey O, Faulkner LM, Gribble SM, Langford CF, Pandian RD, Porter KM, Prigmore E: The DNA sequence and biological annotation of human chromosome 1. Nature. 2006 May 18;441(7091):315-21. [PubMed Link Image]
  4. Gerhard DS, Wagner L, Feingold EA, Shenmen CM, Grouse LH, Schuler G, Klein SL, Old S, Rasooly R, Good P, Guyer M, Peck AM, Derge JG, Lipman D, Collins FS, Jang W, Sherry S, Feolo M, Misquitta L, Lee E, Rotmistrovsky K, Greenhut SF, Schaefer CF, Buetow K, Bonner TI, Haussler D, Kent J, Kiekhaus M, Furey T, Brent M, Prange C, Schreiber K, Shapiro N, Bhat NK, Hopkins RF, Hsie F, Driscoll T, Soares MB, Casavant TL, Scheetz TE, Brown-stein MJ, Usdin TB, Toshiyuki S, Carninci P, Piao Y, Dudekula DB, Ko MS, Kawakami K, Suzuki Y, Sugano S, Gruber CE, Smith MR, Simmons B, Moore T, Waterman R, Johnson SL, Ruan Y, Wei CL, Mathavan S, Gunaratne PH, Wu J, Garcia AM, Hulyk SW, Fuh E, Yuan Y, Sneed A, Kowis C, Hodgson A, Muzny DM, McPherson J, Gibbs RA, Fahey J, Helton E, Ketteman M, Madan A, Rodrigues S, Sanchez A, Whiting M, Madari A, Young AC, Wetherby KD, Granite SJ, Kwong PN, Brinkley CP, Pearson RL, Bouffard GG, Blakesly RW, Green ED, Dickson MC, Rodriguez AC, Grimwood J, Schmutz J, Myers RM, Butterfield YS, Griffith M, Griffith OL, Krzywinski MI, Liao N, Morin R, Palmquist D, Petrescu AS, Skalska U, Smailus DE, Stott JM, Schnerch A, Schein JE, Jones SJ, Holt RA, Baross A, Marra MA, Clifton S, Makowski KA, Bosak S, Malek J: The status, quality, and expansion of the NIH full-length cDNA project: the Mammalian Gene Collection (MGC). Genome Res. 2004 Oct;14(10B):2121-7. [PubMed Link Image]
  5. Goyette P, Sumner JS, Milos R, Duncan AM, Rosenblatt DS, Matthews RG, Rozen R: Human methylenetetrahydrofolate reductase: isolation of cDNA, mapping and mutation identification. Nat Genet. 1994 Jun;7(2):195-200. [PubMed Link Image]
  6. Goyette P, Sumner JS, Milos R, Duncan AM, Rosenblatt DS, Matthews RG, Rozen R: Human methylenetetrahydrofolate reductase: isolation of cDNA mapping and mutation identification. Nat Genet. 1994 Aug;7(4):551. [PubMed Link Image]
  7. Goyette P, Frosst P, Rosenblatt DS, Rozen R: Seven novel mutations in the methylenetetrahydrofolate reductase gene and genotype/phenotype correlations in severe methylenetetrahydrofolate reductase deficiency. Am J Hum Genet. 1995 May;56(5):1052-9. [PubMed Link Image]
  8. van der Put NM, Steegers-Theunissen RP, Frosst P, Trijbels FJ, Eskes TK, van den Heuvel LP, Mariman EC, den Heyer M, Rozen R, Blom HJ: Mutated methylenetetrahydrofolate reductase as a risk factor for spina bifida. Lancet. 1995 Oct 21;346(8982):1070-1. [PubMed Link Image]
  9. Frosst P, Blom HJ, Milos R, Goyette P, Sheppard CA, Matthews RG, Boers GJ, den Heijer M, Kluijtmans LA, van den Heuvel LP, et al.: A candidate genetic risk factor for vascular disease: a common mutation in methylenetetrahydrofolate reductase. Nat Genet. 1995 May;10(1):111-3. [PubMed Link Image]
  10. Ou CY, Stevenson RE, Brown VK, Schwartz CE, Allen WP, Khoury MJ, Rozen R, Oakley GP Jr, Adams MJ Jr: 5,10 Methylenetetrahydrofolate reductase genetic polymorphism as a risk factor for neural tube defects. Am J Med Genet. 1996 Jun 28;63(4):610-4. [PubMed Link Image]
  11. Goyette P, Christensen B, Rosenblatt DS, Rozen R: Severe and mild mutations in cis for the methylenetetrahydrofolate reductase (MTHFR) gene, and description of five novel mutations in MTHFR. Am J Hum Genet. 1996 Dec;59(6):1268-75. [PubMed Link Image]
  12. Chen J, Giovannucci E, Kelsey K, Rimm EB, Stampfer MJ, Colditz GA, Spiegelman D, Willett WC, Hunter DJ: A methylenetetrahydrofolate reductase polymorphism and the risk of colorectal cancer. Cancer Res. 1996 Nov 1;56(21):4862-4. [PubMed Link Image]
  13. Schneider JA, Rees DC, Liu YT, Clegg JB: Worldwide distribution of a common methylenetetrahydrofolate reductase mutation. Am J Hum Genet. 1998 May;62(5):1258-60. [PubMed Link Image]
  14. van der Put NM, Gabreels F, Stevens EM, Smeitink JA, Trijbels FJ, Eskes TK, van den Heuvel LP, Blom HJ: A second common mutation in the methylenetetrahydrofolate reductase gene: an additional risk factor for neural-tube defects? Am J Hum Genet. 1998 May;62(5):1044-51. [PubMed Link Image]
  15. Kluijtmans LA, Wendel U, Stevens EM, van den Heuvel LP, Trijbels FJ, Blom HJ: Identification of four novel mutations in severe methylenetetrahydrofolate reductase deficiency. Eur J Hum Genet. 1998 May-Jun;6(3):257-65. [PubMed Link Image]
  16. Weisberg I, Tran P, Christensen B, Sibani S, Rozen R: A second genetic polymorphism in methylenetetrahydrofolate reductase (MTHFR) associated with decreased enzyme activity. Mol Genet Metab. 1998 Jul;64(3):169-72. [PubMed Link Image]
  17. Christensen B, Arbour L, Tran P, Leclerc D, Sabbaghian N, Platt R, Gilfix BM, Rosenblatt DS, Gravel RA, Forbes P, Rozen R: Genetic polymorphisms in methylenetetrahydrofolate reductase and methionine synthase, folate levels in red blood cells, and risk of neural tube defects. Am J Med Genet. 1999 May 21;84(2):151-7. [PubMed Link Image]
  18. Skibola CF, Smith MT, Kane E, Roman E, Rollinson S, Cartwright RA, Morgan G: Polymorphisms in the methylenetetrahydrofolate reductase gene are associated with susceptibility to acute leukemia in adults. Proc Natl Acad Sci U S A. 1999 Oct 26;96(22):12810-5. [PubMed Link Image]
  19. Sibani S, Christensen B, O'Ferrall E, Saadi I, Hiou-Tim F, Rosenblatt DS, Rozen R: Characterization of six novel mutations in the methylenetetrahydrofolate reductase (MTHFR) gene in patients with homocystinuria. Hum Mutat. 2000;15(3):280-7. [PubMed Link Image]
  20. Casas JP, Hingorani AD, Bautista LE, Sharma P: Meta-analysis of genetic studies in ischemic stroke: thirty-two genes involving approximately 18,000 cases and 58,000 controls. Arch Neurol. 2004 Nov;61(11):1652-61. [PubMed Link Image]
  21. Ley TJ, Mardis ER, Ding L, Fulton B, McLellan MD, Chen K, Dooling D, Dunford-Shore BH, McGrath S, Hickenbotham M, Cook L, Abbott R, Larson DE, Koboldt DC, Pohl C, Smith S, Hawkins A, Abbott S, Locke D, Hillier LW, Miner T, Fulton L, Magrini V, Wylie T, Glasscock J, Conyers J, Sander N, Shi X, Osborne JR, Minx P, Gordon D, Chinwalla A, Zhao Y, Ries RE, Payton JE, Westervelt P, Tomasson MH, Watson M, Baty J, Ivanovich J, Heath S, Shannon WD, Nagarajan R, Walter MJ, Link DC, Graubert TA, DiPersio JF, Wilson RK: DNA sequencing of a cytogenetically normal acute myeloid leukaemia genome. Nature. 2008 Nov 6;456(7218):66-72. [PubMed Link Image]
Enzyme 2 Metabolite References Not Available