Cytochrome P450 7A1

Details

Name
Cytochrome P450 7A1
Synonyms
  • 24-hydroxycholesterol 7-alpha-hydroxylase
  • Cholesterol 7-alpha-hydroxylase
  • Cholesterol 7-alpha-monooxygenase
  • CYP7
  • CYPVII
Gene Name
CYP7A1
Organism
Humans
Amino acid sequence
>lcl|BSEQ0052768|Cytochrome P450 7A1
MMTTSLIWGIAIAACCCLWLILGIRRRQTGEPPLENGLIPYLGCALQFGANPLEFLRANQ
RKHGHVFTCKLMGKYVHFITNPLSYHKVLCHGKYFDWKKFHFATSAKAFGHRSIDPMDGN
TTENINDTFIKTLQGHALNSLTESMMENLQRIMRPPVSSNSKTAAWVTEGMYSFCYRVMF
EAGYLTIFGRDLTRRDTQKAHILNNLDNFKQFDKVFPALVAGLPIHMFRTAHNAREKLAE
SLRHENLQKRESISELISLRMFLNDTLSTFDDLEKAKTHLVVLWASQANTIPATFWSLFQ
MIRNPEAMKAATEEVKRTLENAGQKVSLEGNPICLSQAELNDLPVLDSIIKESLRLSSAS
LNIRTAKEDFTLHLEDGSYNIRKDDIIALYPQLMHLDPEIYPDPLTFKYDRYLDENGKTK
TTFYCNGLKLKYYYMPFGSGATICPGRLFAIHEIKQFLILMLSYFELELIEGQAKCPPLD
QSRAGLGILPPLNDIEFKYKFKHL
Number of residues
504
Molecular Weight
57660.155
Theoretical pI
Not Available
GO Classification
Functions
24-hydroxycholesterol 7alpha-hydroxylase activity / cholesterol 7-alpha-monooxygenase activity / heme binding / iron ion binding / steroid hydroxylase activity
Processes
bile acid and bile salt transport / bile acid biosynthetic process / bile acid signaling pathway / cellular response to cholesterol / cellular response to glucose stimulus / cholesterol catabolic process / cholesterol homeostasis / negative regulation of collagen biosynthetic process / negative regulation of fatty acid biosynthetic process / positive regulation of cholesterol biosynthetic process / regulation of bile acid biosynthetic process / regulation of gene expression / response to ethanol / sterol metabolic process
Components
endoplasmic reticulum membrane / integral component of membrane / intracellular membrane-bounded organelle
General Function
A cytochrome P450 monooxygenase involved in the metabolism of endogenous cholesterol and its oxygenated derivatives (oxysterols) (PubMed:11013305, PubMed:12077124, PubMed:19965590, PubMed:2384150, PubMed:21813643). Mechanistically, uses molecular oxygen inserting one oxygen atom into a substrate, and reducing the second into a water molecule, with two electrons provided by NADPH via cytochrome P450 reductase (CPR; NADPH-ferrihemoprotein reductase) (PubMed:2384150, PubMed:11013305, PubMed:12077124, PubMed:19965590, PubMed:21813643). Functions as a critical regulatory enzyme of bile acid biosynthesis and cholesterol homeostasis. Catalyzes the hydroxylation of carbon hydrogen bond at 7-alpha position of cholesterol, a rate-limiting step in cholesterol catabolism and bile acid biosynthesis (PubMed:12077124, PubMed:19965590, PubMed:2384150). 7-alpha hydroxylates several oxysterols, including 4beta-hydroxycholesterol and 24-hydroxycholesterol (PubMed:11013305, PubMed:12077124). Catalyzes the oxidation of the 7,8 double bond of 7-dehydrocholesterol and lathosterol with direct and predominant formation of the 7-keto derivatives (PubMed:21813643).
Specific Function
24-hydroxycholesterol 7alpha-hydroxylase activity
Pfam Domain Function
Transmembrane Regions
4-24
Cellular Location
Endoplasmic reticulum membrane
Gene sequence
>lcl|BSEQ0052769|Cytochrome P450 7A1 (CYP7A1)
ATGATGACCACATCTTTGATTTGGGGGATTGCTATAGCAGCATGCTGTTGTCTATGGCTT
ATTCTTGGAATTAGGAGAAGGCAAACGGGTGAACCACCTCTAGAGAATGGATTAATTCCA
TACCTGGGCTGTGCTCTGCAATTTGGTGCCAATCCTCTTGAGTTCCTCAGAGCAAATCAA
AGGAAACATGGTCATGTTTTTACCTGCAAACTAATGGGAAAATATGTCCATTTCATCACA
AATCCCTTGTCATACCATAAGGTGTTGTGCCACGGAAAATATTTTGATTGGAAAAAATTT
CACTTTGCTACTTCTGCGAAGGCATTTGGGCACAGAAGCATTGACCCGATGGATGGAAAT
ACCACTGAAAACATAAACGACACTTTCATCAAAACCCTGCAGGGCCATGCCTTGAATTCC
CTCACGGAAAGCATGATGGAAAACCTCCAACGTATCATGAGACCTCCAGTCTCCTCTAAC
TCAAAGACCGCTGCCTGGGTGACAGAAGGGATGTATTCTTTCTGCTACCGAGTGATGTTT
GAAGCTGGGTATTTAACTATCTTTGGCAGAGATCTTACAAGGCGGGACACACAGAAAGCA
CATATTCTAAACAATCTTGACAACTTCAAGCAATTCGACAAAGTCTTTCCAGCCCTGGTA
GCAGGCCTCCCCATTCACATGTTCAGGACTGCGCACAATGCCCGGGAGAAACTGGCAGAG
AGCTTGAGGCACGAGAACCTCCAAAAGAGGGAAAGCATCTCAGAACTGATCAGCCTGCGC
ATGTTTCTCAATGACACTTTGTCCACCTTTGATGATCTGGAGAAGGCCAAGACACACCTC
GTGGTCCTCTGGGCATCGCAAGCAAACACCATTCCAGCGACTTTCTGGAGTTTATTTCAA
ATGATTAGGAACCCAGAAGCAATGAAAGCAGCTACTGAAGAAGTGAAAAGAACATTAGAG
AATGCTGGTCAAAAAGTCAGCTTGGAAGGCAATCCTATTTGTTTGAGTCAAGCAGAACTG
AATGACCTGCCAGTATTAGATAGTATAATCAAGGAATCGCTGAGGCTTTCCAGTGCCTCC
CTCAACATCCGGACAGCTAAGGAGGATTTCACTTTGCACCTTGAGGACGGTTCCTACAAC
ATCCGAAAAGATGACATCATAGCTCTTTACCCACAGTTAATGCACTTAGATCCAGAAATC
TACCCAGACCCTTTGACTTTTAAATATGATAGGTATCTTGATGAAAACGGGAAGACAAAG
ACTACCTTCTATTGTAATGGACTCAAGTTAAAGTATTACTACATGCCCTTTGGATCGGGA
GCTACAATATGTCCTGGAAGATTGTTCGCTATCCACGAAATCAAGCAATTTTTGATTCTG
ATGCTTTCTTATTTTGAATTGGAGCTTATAGAGGGCCAAGCTAAATGTCCACCTTTGGAC
CAGTCCCGGGCAGGCTTGGGCATTTTGCCGCCATTGAATGATATTGAATTTAAATATAAA
TTCAAGCATTTGTGA
Chromosome Location
8
Locus
8q12.1
External Identifiers
ResourceLink
UniProtKB IDP22680
UniProtKB Entry NameCP7A1_HUMAN
HGNC IDHGNC:2651
General References
  1. Nishimoto M, Noshiro M, Okuda K: Structure of the gene encoding human liver cholesterol 7 alpha-hydroxylase. Biochim Biophys Acta. 1993 Feb 20;1172(1-2):147-50. doi: 10.1016/0167-4781(93)90281-h. [Article]
  2. Noshiro M, Okuda K: Molecular cloning and sequence analysis of cDNA encoding human cholesterol 7 alpha-hydroxylase. FEBS Lett. 1990 Jul 30;268(1):137-40. doi: 10.1016/0014-5793(90)80992-r. [Article]
  3. Karam WG, Chiang JY: Polymorphisms of human cholesterol 7 alpha-hydroxylase. Biochem Biophys Res Commun. 1992 Jun 15;185(2):588-95. doi: 10.1016/0006-291x(92)91665-d. [Article]
  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. [Article]
  5. Wang DP, Chiang JY: Structure and nucleotide sequences of the human cholesterol 7 alpha-hydroxylase gene (CYP7). Genomics. 1994 Mar 15;20(2):320-3. doi: 10.1006/geno.1994.1177. [Article]
  6. Molowa DT, Chen WS, Cimis GM, Tan CP: Transcriptional regulation of the human cholesterol 7 alpha-hydroxylase gene. Biochemistry. 1992 Mar 10;31(9):2539-44. doi: 10.1021/bi00124a014. [Article]
  7. Norlin M, Toll A, Bjorkhem I, Wikvall K: 24-hydroxycholesterol is a substrate for hepatic cholesterol 7alpha-hydroxylase (CYP7A). J Lipid Res. 2000 Oct;41(10):1629-39. [Article]
  8. Bodin K, Andersson U, Rystedt E, Ellis E, Norlin M, Pikuleva I, Eggertsen G, Bjorkhem I, Diczfalusy U: Metabolism of 4 beta -hydroxycholesterol in humans. J Biol Chem. 2002 Aug 30;277(35):31534-40. doi: 10.1074/jbc.M201712200. Epub 2002 Jun 20. [Article]
  9. Abrahamsson A, Gustafsson U, Ellis E, Nilsson LM, Sahlin S, Bjorkhem I, Einarsson C: Feedback regulation of bile acid synthesis in human liver: importance of HNF-4alpha for regulation of CYP7A1. Biochem Biophys Res Commun. 2005 May 6;330(2):395-9. doi: 10.1016/j.bbrc.2005.02.170. [Article]
  10. Li T, Chanda D, Zhang Y, Choi HS, Chiang JY: Glucose stimulates cholesterol 7alpha-hydroxylase gene transcription in human hepatocytes. J Lipid Res. 2010 Apr;51(4):832-42. doi: 10.1194/jlr.M002782. Epub 2009 Oct 28. [Article]
  11. Shinkyo R, Xu L, Tallman KA, Cheng Q, Porter NA, Guengerich FP: Conversion of 7-dehydrocholesterol to 7-ketocholesterol is catalyzed by human cytochrome P450 7A1 and occurs by direct oxidation without an epoxide intermediate. J Biol Chem. 2011 Sep 23;286(38):33021-8. doi: 10.1074/jbc.M111.282434. Epub 2011 Aug 3. [Article]
  12. 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. [Article]

Drug Relations

Drug Relations
DrugBank IDNameDrug groupPharmacological action?ActionsDetails
DB05667Levoketoconazoleapproved, investigationalnoinhibitorDetails