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Identification
HMDB Protein ID HMDBP01553
Secondary Accession Numbers
  • 6849
Name Cytochrome P450 2B6
Synonyms
  1. CYPIIB6
  2. Cytochrome P450 IIB1
  3. 1,4-cineole 2-exo-monooxygenase
Gene Name CYP2B6
Protein Type Unknown
Biological Properties
General Function Involved in monooxygenase activity
Specific Function Cytochromes P450 are a group of heme-thiolate monooxygenases. In liver microsomes, this enzyme is involved in an NADPH-dependent electron transport pathway. It oxidizes a variety of structurally unrelated compounds, including steroids, fatty acids, and xenobiotics. Acts as a 1,4-cineole 2-exo-monooxygenase.
Pathways
  • Acetaminophen Action Pathway
  • Acetylsalicylic Acid Action Pathway
  • Antipyrine Action Pathway
  • Antrafenine Action Pathway
  • Arachidonic acid metabolism
  • Arachidonic Acid Metabolism
  • Bromfenac Action Pathway
  • Carbamazepine Metabolism Pathway
  • Carprofen Action Pathway
  • Celecoxib Action Pathway
  • Chemical carcinogenesis
  • Clopidogrel Action Pathway
  • Clopidogrel Metabolism Pathway
  • Cyclophosphamide Action Pathway
  • Cyclophosphamide Metabolism Pathway
  • Diclofenac Action Pathway
  • Diflunisal Action Pathway
  • Drug metabolism - cytochrome P450
  • Etodolac Action Pathway
  • Etoricoxib Action Pathway
  • Fenoprofen Action Pathway
  • Flurbiprofen Action Pathway
  • Ibuprofen Action Pathway
  • Ifosfamide Action Pathway
  • Ifosfamide Metabolism Pathway
  • Indomethacin Action Pathway
  • Ketoprofen Action Pathway
  • Ketorolac Action Pathway
  • Leukotriene C4 Synthesis Deficiency
  • Lornoxicam Action Pathway
  • Lumiracoxib Action Pathway
  • Magnesium salicylate Action Pathway
  • Mefenamic Acid Action Pathway
  • Meloxicam Action Pathway
  • Metabolism of xenobiotics by cytochrome P450
  • Methadone Action Pathway
  • Methadone Metabolism Pathway
  • Nabumetone Action Pathway
  • Naproxen Action Pathway
  • Nepafenac Action Pathway
  • Nevirapine Metabolism Pathway
  • Nicotine Action Pathway
  • Nicotine Metabolism Pathway
  • Oxaprozin Action Pathway
  • Phenylbutazone Action Pathway
  • Piroxicam Action Pathway
  • Retinol metabolism
  • Retinol Metabolism
  • Rofecoxib Action Pathway
  • Salicylate-sodium Action Pathway
  • Salicylic Acid Action Pathway
  • Salsalate Action Pathway
  • Sorafenib Metabolism Pathway
  • Sulindac Action Pathway
  • Suprofen Action Pathway
  • Tamoxifen Action Pathway
  • Tamoxifen Metabolism Pathway
  • Tenoxicam Action Pathway
  • Tiaprofenic Acid Action Pathway
  • Tolmetin Action Pathway
  • Tramadol Metabolism Pathway
  • Trisalicylate-choline Action Pathway
  • Valdecoxib Action Pathway
  • Valproic Acid Metabolism Pathway
  • Vitamin A Deficiency
Reactions
1,4-cineole + NADPH + Oxygen → 2-exo-hydroxy-1,4-cineole + NADP + Water details
GO Classification
Biological Process
exogenous drug catabolic process
steroid metabolic process
xenobiotic metabolic process
cellular ketone metabolic process
Cellular Component
endoplasmic reticulum membrane
Function
ion binding
cation binding
metal ion binding
binding
catalytic activity
transition metal ion binding
electron carrier activity
iron ion binding
monooxygenase activity
heme binding
oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen, reduced flavin or flavoprotein as one donor, and incorporation of one atom of oxygen
oxidoreductase activity
Molecular Function
electron carrier activity
monooxygenase activity
oxidoreductase activity, acting on paired donors, with incorporation or reduction of molecular oxygen, reduced flavin or flavoprotein as one donor, and incorporation of one atom of oxygen
iron ion binding
heme binding
Process
metabolic process
oxidation reduction
Cellular Location
  1. Peripheral membrane protein
  2. Peripheral membrane protein
  3. Endoplasmic reticulum membrane
  4. Microsome membrane
Gene Properties
Chromosome Location 19
Locus 19q13.2
SNPs CYP2B6
Gene Sequence
>1476 bp
ATGGAACTCAGCGTCCTCCTCTTCCTTGCACTCCTCACAGGACTCTTGCTACTCCTGGTT
CAGCGCCACCCTAACACCCATGACCGCCTCCCACCAGGGCCCCGCCCTCTGCCCCTTTTG
GGAAACCTTCTGCAGATGGATAGAAGAGGCCTACTCAAATCCTTTCTGAGGTTCCGAGAG
AAATATGGGGACGTCTTCACGGTACACCTGGGACCGAGGCCCGTGGTCATGCTGTGTGGA
GTAGAGGCCATACGGGAGGCCCTTGTGGACAAGGCTGAGGCCTTCTCTGGCCGGGGAAAA
ATCGCCATGGTCGACCCATTCTTCCGGGGATATGGTGTGATCTTTGCCAATGGAAACCGC
TGGAAGGTGCTTCGGCGATTCTCTGTGACCACTATGAGGGACTTCGGGATGGGAAAGCGG
AGTGTGGAGGAGCGGATTCAGGAGGAGGCTCAGTGTCTGATAGAGGAGCTTCGGAAATCC
AAGGGGGCCCTCATGGACCCCACCTTCCTCTTCCAGTCCATTACCGCCAACATCATCTGC
TCCATCGTCTTTGGAAAACGATTCCACTACCAAGATCAAGAGTTCCTGAAGATGCTGAAC
TTGTTCTACCAGACTTTTTCACTCATCAGCTCTGTATTCGGCCAGCTGTTTGAGCTCTTC
TCTGGCTTCTTGAAATACTTTCCTGGGGCACACAGGCAAGTTTACAAAAACCTGCAGGAA
ATCAATGCTTACATTGGCCACAGTGTGGAGAAGCACCGTGAAACCCTGGACCCCAGCGCC
CCCAAGGACCTCATCGACACCTACCTGCTCCACATGGAAAAAGAGAAATCCAACGCACAC
AGTGAATTCAGCCACCAGAACCTCAACCTCAACACGCTCTCGCTCTTCTTTGCTGGCACT
GAGACCACCAGCACCACTCTCCGCTACGGCTTCCTGCTCATGCTCAAATACCCTCATGTT
GCAGAGAGAGTCTACAGGGAGATTGAACAGGTGATTGGCCCACATCGCCCTCCAGAGCTT
CATGACCGAGCCAAAATGCCATACACAGAGGCAGTCATCTATGAGATTCAGAGATTTTCC
GACCTTCTCCCCATGGGTGTGCCCCACATTGTCACCCAACACACCAGCTTCCGAGGGTAC
ATCATCCCCAAGGACACAGAAGTATTTCTCATCCTGAGCACTGCTCTCCATGACCCACAC
TACTTTGAAAAACCAGACGCCTTCAATCCTGACCACTTTCTGGATGCCAATGGGGCACTG
AAAAAGACTGAAGCTTTTATCCCCTTCTCCTTAGGGAAGCGGATTTGTCTTGGTGAAGGC
ATCGCCCGTGCGGAATTGTTCCTCTTCTTCACCACCATCCTCCAGAACTTCTCCATGGCC
AGCCCCGTGGCCCCAGAAGACATCGATCTGACACCCCAGGAGTGTGGTGTGGGCAAAATA
CCCCCAACATACCAGATCCGCTTCCTGCCCCGCTGA
Protein Properties
Number of Residues 491
Molecular Weight 56277.81
Theoretical pI 8.282
Pfam Domain Function
Signals Not Available
Transmembrane Regions Not Available
Protein Sequence
>Cytochrome P450 2B6
MELSVLLFLALLTGLLLLLVQRHPNTHDRLPPGPRPLPLLGNLLQMDRRGLLKSFLRFRE
KYGDVFTVHLGPRPVVMLCGVEAIREALVDKAEAFSGRGKIAMVDPFFRGYGVIFANGNR
WKVLRRFSVTTMRDFGMGKRSVEERIQEEAQCLIEELRKSKGALMDPTFLFQSITANIIC
SIVFGKRFHYQDQEFLKMLNLFYQTFSLISSVFGQLFELFSGFLKYFPGAHRQVYKNLQE
INAYIGHSVEKHRETLDPSAPKDLIDTYLLHMEKEKSNAHSEFSHQNLNLNTLSLFFAGT
ETTSTTLRYGFLLMLKYPHVAERVYREIEQVIGPHRPPELHDRAKMPYTEAVIYEIQRFS
DLLPMGVPHIVTQHTSFRGYIIPKDTEVFLILSTALHDPHYFEKPDAFNPDHFLDANGAL
KKTEAFIPFSLGKRICLGEGIARAELFLFFTTILQNFSMASPVAPEDIDLTPQECGVGKI
PPTYQIRFLPR
GenBank ID Protein Not Available
UniProtKB/Swiss-Prot ID P20813
UniProtKB/Swiss-Prot Entry Name CP2B6_HUMAN
PDB IDs
GenBank Gene ID M29874
GeneCard ID CYP2B6
GenAtlas ID CYP2B6
HGNC ID HGNC:2615
References
General References
  1. Grimwood J, Gordon LA, Olsen A, Terry A, Schmutz J, Lamerdin J, Hellsten U, Goodstein D, Couronne O, Tran-Gyamfi M, Aerts A, Altherr M, Ashworth L, Bajorek E, Black S, Branscomb E, Caenepeel S, Carrano A, Caoile C, Chan YM, Christensen M, Cleland CA, Copeland A, Dalin E, Dehal P, Denys M, Detter JC, Escobar J, Flowers D, Fotopulos D, Garcia C, Georgescu AM, Glavina T, Gomez M, Gonzales E, Groza M, Hammon N, Hawkins T, Haydu L, Ho I, Huang W, Israni S, Jett J, Kadner K, Kimball H, Kobayashi A, Larionov V, Leem SH, Lopez F, Lou Y, Lowry S, Malfatti S, Martinez D, McCready P, Medina C, Morgan J, Nelson K, Nolan M, Ovcharenko I, Pitluck S, Pollard M, Popkie AP, Predki P, Quan G, Ramirez L, Rash S, Retterer J, Rodriguez A, Rogers S, Salamov A, Salazar A, She X, Smith D, Slezak T, Solovyev V, Thayer N, Tice H, Tsai M, Ustaszewska A, Vo N, Wagner M, Wheeler J, Wu K, Xie G, Yang J, Dubchak I, Furey TS, DeJong P, Dickson M, Gordon D, Eichler EE, Pennacchio LA, Richardson P, Stubbs L, Rokhsar DS, Myers RM, Rubin EM, Lucas SM: The DNA sequence and biology of human chromosome 19. Nature. 2004 Apr 1;428(6982):529-35. [PubMed:15057824 ]
  2. Saito S, Iida A, Sekine A, Kawauchi S, Higuchi S, Ogawa C, Nakamura Y: Catalog of 680 variations among eight cytochrome p450 ( CYP) genes, nine esterase genes, and two other genes in the Japanese population. J Hum Genet. 2003;48(5):249-70. Epub 2003 Apr 29. [PubMed:12721789 ]
  3. Solus JF, Arietta BJ, Harris JR, Sexton DP, Steward JQ, McMunn C, Ihrie P, Mehall JM, Edwards TL, Dawson EP: Genetic variation in eleven phase I drug metabolism genes in an ethnically diverse population. Pharmacogenomics. 2004 Oct;5(7):895-931. [PubMed:15469410 ]
  4. Yamano S, Nhamburo PT, Aoyama T, Meyer UA, Inaba T, Kalow W, Gelboin HV, McBride OW, Gonzalez FJ: cDNA cloning and sequence and cDNA-directed expression of human P450 IIB1: identification of a normal and two variant cDNAs derived from the CYP2B locus on chromosome 19 and differential expression of the IIB mRNAs in human liver. Biochemistry. 1989 Sep 5;28(18):7340-8. [PubMed:2573390 ]
  5. Miles JS, McLaren AW, Wolf CR: Alternative splicing in the human cytochrome P450IIB6 gene generates a high level of aberrant messages. Nucleic Acids Res. 1989 Oct 25;17(20):8241-55. [PubMed:2813061 ]
  6. Thum T, Borlak J: Gene expression in distinct regions of the heart. Lancet. 2000 Mar 18;355(9208):979-83. [PubMed:10768437 ]
  7. Ariyoshi N, Miyazaki M, Toide K, Sawamura Yi, Kamataki T: A single nucleotide polymorphism of CYP2b6 found in Japanese enhances catalytic activity by autoactivation. Biochem Biophys Res Commun. 2001 Mar;281(5):1256-60. [PubMed:11243870 ]
  8. Lang T, Klein K, Fischer J, Nussler AK, Neuhaus P, Hofmann U, Eichelbaum M, Schwab M, Zanger UM: Extensive genetic polymorphism in the human CYP2B6 gene with impact on expression and function in human liver. Pharmacogenetics. 2001 Jul;11(5):399-415. [PubMed:11470993 ]
  9. Jinno H, Tanaka-Kagawa T, Ohno A, Makino Y, Matsushima E, Hanioka N, Ando M: Functional characterization of cytochrome P450 2B6 allelic variants. Drug Metab Dispos. 2003 Apr;31(4):398-403. [PubMed:12642465 ]
  10. Lamba V, Lamba J, Yasuda K, Strom S, Davila J, Hancock ML, Fackenthal JD, Rogan PK, Ring B, Wrighton SA, Schuetz EG: Hepatic CYP2B6 expression: gender and ethnic differences and relationship to CYP2B6 genotype and CAR (constitutive androstane receptor) expression. J Pharmacol Exp Ther. 2003 Dec;307(3):906-22. Epub 2003 Oct 9. [PubMed:14551287 ]
  11. Lang T, Klein K, Richter T, Zibat A, Kerb R, Eichelbaum M, Schwab M, Zanger UM: Multiple novel nonsynonymous CYP2B6 gene polymorphisms in Caucasians: demonstration of phenotypic null alleles. J Pharmacol Exp Ther. 2004 Oct;311(1):34-43. Epub 2004 Jun 9. [PubMed:15190123 ]