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25-Hydroxyvitamin D 1-alpha-hydroxylase

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(Redirected from 1α-hydroxylase)
CYP27B1
Identifiers
AliasesCYP27B1, CP2B, CYP1, CYP1alpha, CYP27B, P450c1, PDDR, VDD1, VDDR, VDDRI, VDR, cytochrome P450 family 27 subfamily B member 1
External IDsOMIM: 609506; MGI: 1098274; HomoloGene: 37139; GeneCards: CYP27B1; OMA:CYP27B1 - orthologs
EC number1.14.15.18
Orthologs
SpeciesHumanMouse
Entrez
Ensembl
UniProt
RefSeq (mRNA)

NM_000785

NM_010009

RefSeq (protein)

NP_000776

NP_034139

Location (UCSC)Chr 12: 57.76 – 57.77 MbChr 10: 126.88 – 126.89 Mb
PubMed search[3][4]
Wikidata
View/Edit HumanView/Edit Mouse
calcidiol 1-monooxygenase
Identifiers
EC no.1.14.15.18
CAS no.9081-36-1
Databases
IntEnzIntEnz view
BRENDABRENDA entry
ExPASyNiceZyme view
KEGGKEGG entry
MetaCycmetabolic pathway
PRIAMprofile
PDB structuresRCSB PDB PDBe PDBsum
Gene OntologyAmiGO / QuickGO
Search
PMCarticles
PubMedarticles
NCBIproteins

25-Hydroxyvitamin D 1-alpha-hydroxylase (VD 1A hydroxylase) also known as calcidiol 1-monooxygenase [5] or cytochrome p450 27B1 (CYP27B1) or simply 1-alpha-hydroxylase is a cytochrome P450 enzyme that in humans is encoded by the CYP27B1 gene.[6][7][8]

VD 1A hydroxylase is located in the proximal tubule of the kidney and a variety of other tissues, including skin (keratinocytes), immune cells,[9] and bone (osteoblasts).[10]

Reactions

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The enzyme catalyzes the hydroxylation of calcifediol to calcitriol (the bioactive form of Vitamin D):[11]

calcidiol + 2 reduced adrenodoxin + 2 H+ + O2 ⇌ calcitriol + 2 oxidized adrenodoxin + H2O

The enzyme is also able to oxidize ercalcidiol (25-OH D2) to ercalcitriol, secalciferol to calcitetrol, and 25-hydroxy-24-oxocalciol to (1S)-1,25-dihydroxy-24-oxocalciol.[12]

Clinical significance

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Loss-of-function mutations in CYP27B1 cause Vitamin D-dependent rickets, type IA.[13]

Interactive pathway map

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Click on genes, proteins and metabolites below to link to respective articles. [§ 1]

[[File:
VitaminDSynthesis_WP1531Go to articleGo to articleGo to articleGo to articlego to articleGo to articleGo to articleGo to articlego to articlego to articlego to articlego to articleGo to articleGo to articlego to articleGo to articlego to articlego to articlego to articleGo to articlego to article
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VitaminDSynthesis_WP1531Go to articleGo to articleGo to articleGo to articlego to articleGo to articleGo to articleGo to articlego to articlego to articlego to articlego to articleGo to articleGo to articlego to articleGo to articlego to articlego to articlego to articleGo to articlego to article
|alt=Vitamin D Synthesis Pathway (view / edit)]]
Vitamin D Synthesis Pathway (view / edit)
  1. ^ The interactive pathway map can be edited at WikiPathways: "VitaminDSynthesis_WP1531".

References

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  1. ^ a b c GRCh38: Ensembl release 89: ENSG00000111012Ensembl, May 2017
  2. ^ a b c GRCm38: Ensembl release 89: ENSMUSG00000006724Ensembl, May 2017
  3. ^ "Human PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  4. ^ "Mouse PubMed Reference:". National Center for Biotechnology Information, U.S. National Library of Medicine.
  5. ^ "25-Hydroxyvitamin D3 1-Alpha-Hydroxylase - an overview | ScienceDirect Topics".
  6. ^ "Entrez Gene: cytochrome P450".
  7. ^ Takeyama K, Kitanaka S, Sato T, Kobori M, Yanagisawa J, Kato S (Sep 1997). "25-Hydroxyvitamin D3 1alpha-hydroxylase and vitamin D synthesis". Science. 277 (5333): 1827–30. doi:10.1126/science.277.5333.1827. PMID 9295274.
  8. ^ Monkawa T, Yoshida T, Wakino S, Shinki T, Anazawa H, Deluca HF, Suda T, Hayashi M, Saruta T (Oct 1997). "Molecular cloning of cDNA and genomic DNA for human 25-hydroxyvitamin D3 1 alpha-hydroxylase". Biochemical and Biophysical Research Communications. 239 (2): 527–33. doi:10.1006/bbrc.1997.7508. PMID 9344864.
  9. ^ Sigmundsdottir H, Pan J, Debes GF, Alt C, Habtezion A, Soler D, Butcher EC (Mar 2007). "DCs metabolize sunlight-induced vitamin D3 to 'program' T cell attraction to the epidermal chemokine CCL27" (PDF). Nature Immunology. 8 (3): 285–93. doi:10.1038/ni1433. PMID 17259988. S2CID 9540123.[permanent dead link]
  10. ^ Kogawa M, Findlay DM, Anderson PH, Ormsby R, Vincent C, Morris HA, Atkins GJ (Oct 2010). "Osteoclastic metabolism of 25(OH)-vitamin D3: a potential mechanism for optimization of bone resorption". Endocrinology. 151 (10): 4613–25. doi:10.1210/en.2010-0334. PMID 20739402.
  11. ^ Gray RW, Omdahl JL, Ghazarian JG, DeLuca HF (Dec 1972). "25-Hydroxycholecalciferol-1-hydroxylase. Subcellular location and properties". The Journal of Biological Chemistry. 247 (23): 7528–32. doi:10.1016/S0021-9258(19)44557-2. PMID 4404596.
  12. ^ Sawada, N; Sakaki, T; Kitanaka, S; Takeyama, K; Kato, S; Inouye, K (November 1999). "Enzymatic properties of human 25-hydroxyvitamin D3 1alpha-hydroxylase coexpression with adrenodoxin and NADPH-adrenodoxin reductase in Escherichia coli". European Journal of Biochemistry. 265 (3): 950–6. doi:10.1046/j.1432-1327.1999.00794.x. PMID 10518789.
  13. ^ "# 264700 - VITAMIN D HYDROXYLATION-DEFICIENT RICKETS, TYPE 1A; VDDR1A". www.omim.org.

Further reading

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