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3qe2

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Revision as of 18:31, 5 August 2016

Crystal Structure of Human NADPH-Cytochrome P450 Reductase

Structural highlights

3qe2 is a 2 chain structure with sequence from Human. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	, , ,
Related:	3qfc, 3qfr, 3qfs, 3qft
Gene:	POR, CYPOR (HUMAN)
Activity:	NADPH--hemoprotein reductase, with EC number 1.6.2.4
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Disease

[NCPR_HUMAN] Defects in POR are the cause of Antley-Bixler syndrome with genital anomalies and disordered steroidogenesis (ABS1) [MIM:201750]. A disease characterized by the association of Antley-Bixler syndrome with steroidogenesis defects and abnormal genitalia. Antley-Bixler syndrome is characterized by craniosynostosis, radiohumeral synostosis present from the perinatal period, midface hypoplasia, choanal stenosis or atresia, femoral bowing and multiple joint contractures.^[1] ^[2] ^[3] Defects in POR are the cause of disordered steroidogenesis due to cytochrome P450 oxidoreductase deficiency (DISPORD) [MIM:613571]. A disorder resulting in a rare variant of congenital adrenal hyperplasia, with apparent combined P450C17 and P450C21 deficiency and accumulation of steroid metabolites. Affected girls are born with ambiguous genitalia, but their circulating androgens are low and virilization does not progress. Conversely, affected boys are sometimes born undermasculinized. Boys and girls can present with bone malformations, in some cases resembling the pattern seen in patients with Antley-Bixler syndrome.^[4] ^[5]

Function

[NCPR_HUMAN] This enzyme is required for electron transfer from NADP to cytochrome P450 in microsomes. It can also provide electron transfer to heme oxygenase and cytochrome B5.

Publication Abstract from PubMed

NADPH-cytochrome P450 oxidoreductase (CYPOR) is essential for electron donation to microsomal cytochrome P450-mediated monooxygenation in such diverse physiological processes as drug metabolism (approximately 85-90% of therapeutic drugs), steroid biosynthesis, and bioactive metabolite production (vitamin D and retinoic acid metabolites). Expressed by a single gene, CYPOR's role with these multiple redox partners renders it a model for understanding protein-protein interactions at the structural level. Polymorphisms in human CYPOR have been shown to lead to defects in bone development and steroidogenesis, resulting in sexual dimorphisms, the severity of which differs significantly depending on the degree of CYPOR impairment. The atomic structure of human CYPOR is presented, with structures of two naturally occurring missense mutations, V492E and R457H. The overall structures of these CYPOR variants are similar to wild type. However, in both variants, local disruption of H bonding and salt bridging, involving the FAD pyrophosphate moiety, leads to weaker FAD binding, unstable protein, and loss of catalytic activity, which can be rescued by cofactor addition. The modes of polypeptide unfolding in these two variants differ significantly, as revealed by limited trypsin digestion: V492E is less stable but unfolds locally and gradually, whereas R457H is more stable but unfolds globally. FAD addition to either variant prevents trypsin digestion, supporting the role of the cofactor in conferring stability to CYPOR structure. Thus, CYPOR dysfunction in patients harboring these particular mutations may possibly be prevented by riboflavin therapy in utero, if predicted prenatally, or rescued postnatally in less severe cases.

Structural basis for human NADPH-cytochrome P450 oxidoreductase deficiency.,Xia C, Panda SP, Marohnic CC, Martasek P, Masters BS, Kim JJ Proc Natl Acad Sci U S A. 2011 Aug 16;108(33):13486-91. Epub 2011 Aug 1. PMID:21808038^[6]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Adachi M, Tachibana K, Asakura Y, Yamamoto T, Hanaki K, Oka A. Compound heterozygous mutations of cytochrome P450 oxidoreductase gene (POR) in two patients with Antley-Bixler syndrome. Am J Med Genet A. 2004 Aug 1;128A(4):333-9. PMID:15264278 doi:10.1002/ajmg.a.30169
↑ Fukami M, Horikawa R, Nagai T, Tanaka T, Naiki Y, Sato N, Okuyama T, Nakai H, Soneda S, Tachibana K, Matsuo N, Sato S, Homma K, Nishimura G, Hasegawa T, Ogata T. Cytochrome P450 oxidoreductase gene mutations and Antley-Bixler syndrome with abnormal genitalia and/or impaired steroidogenesis: molecular and clinical studies in 10 patients. J Clin Endocrinol Metab. 2005 Jan;90(1):414-26. Epub 2004 Oct 13. PMID:15483095 doi:jc.2004-0810
↑ Fluck CE, Tajima T, Pandey AV, Arlt W, Okuhara K, Verge CF, Jabs EW, Mendonca BB, Fujieda K, Miller WL. Mutant P450 oxidoreductase causes disordered steroidogenesis with and without Antley-Bixler syndrome. Nat Genet. 2004 Mar;36(3):228-30. Epub 2004 Feb 1. PMID:14758361 doi:10.1038/ng1300
↑ Fluck CE, Tajima T, Pandey AV, Arlt W, Okuhara K, Verge CF, Jabs EW, Mendonca BB, Fujieda K, Miller WL. Mutant P450 oxidoreductase causes disordered steroidogenesis with and without Antley-Bixler syndrome. Nat Genet. 2004 Mar;36(3):228-30. Epub 2004 Feb 1. PMID:14758361 doi:10.1038/ng1300
↑ Arlt W, Walker EA, Draper N, Ivison HE, Ride JP, Hammer F, Chalder SM, Borucka-Mankiewicz M, Hauffa BP, Malunowicz EM, Stewart PM, Shackleton CH. Congenital adrenal hyperplasia caused by mutant P450 oxidoreductase and human androgen synthesis: analytical study. Lancet. 2004 Jun 26;363(9427):2128-35. PMID:15220035 doi:10.1016/S0140-6736(04)16503-3
↑ Xia C, Panda SP, Marohnic CC, Martasek P, Masters BS, Kim JJ. Structural basis for human NADPH-cytochrome P450 oxidoreductase deficiency. Proc Natl Acad Sci U S A. 2011 Aug 16;108(33):13486-91. Epub 2011 Aug 1. PMID:21808038 doi:10.1073/pnas.1106632108

1 Structural highlights
2 Disease
3 Function
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3qe2"

@@ Line 1: / Line 1: @@
 ==Crystal Structure of Human NADPH-Cytochrome P450 Reductase==
 <StructureSection load='3qe2' size='340' side='right' caption='[[3qe2]], [[Resolution|resolution]] 1.75&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[3qe2]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3QE2 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3QE2 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[3qe2]] is a 2 chain structure with sequence from [http://en.wikipedia.org/wiki/Human Human]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=3QE2 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3QE2 FirstGlance]. <br>
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene>, <scene name='pdbligand=FAD:FLAVIN-ADENINE+DINUCLEOTIDE'>FAD</scene>, <scene name='pdbligand=FMN:FLAVIN+MONONUCLEOTIDE'>FMN</scene>, <scene name='pdbligand=NAP:NADP+NICOTINAMIDE-ADENINE-DINUCLEOTIDE+PHOSPHATE'>NAP</scene></td></tr>
 <tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[3qfc|3qfc]], [[3qfr|3qfr]], [[3qfs|3qfs]], [[3qft|3qft]]</td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">POR, CYPOR ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 Homo sapiens])</td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">POR, CYPOR ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9606 HUMAN])</td></tr>
 <tr id='activity'><td class="sblockLbl"><b>Activity:</b></td><td class="sblockDat"><span class='plainlinks'>[http://en.wikipedia.org/wiki/NADPH--hemoprotein_reductase NADPH--hemoprotein reductase], with EC number [http://www.brenda-enzymes.info/php/result_flat.php4?ecno=1.6.2.4 1.6.2.4] </span></td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3qe2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3qe2 OCA], [http://www.rcsb.org/pdb/explore.do?structureId=3qe2 RCSB], [http://www.ebi.ac.uk/pdbsum/3qe2 PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3qe2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3qe2 OCA], [http://pdbe.org/3qe2 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3qe2 RCSB], [http://www.ebi.ac.uk/pdbsum/3qe2 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3qe2 ProSAT]</span></td></tr>
 </table>
 == Disease ==
@@ Line 21: / Line 22: @@
 From MEDLINE&reg;/PubMed&reg;, a database of the U.S. National Library of Medicine.<br>
 </div>
+<div class="pdbe-citations 3qe2" style="background-color:#fffaf0;"></div>
 ==See Also==
@@ Line 28: / Line 30: @@
 __TOC__
 </StructureSection>
-[[Category: Homo sapiens]]
+[[Category: Human]]
 [[Category: NADPH--hemoprotein reductase]]
 [[Category: Kim, J J.P]]

3qe2

From Proteopedia

Revision as of 18:31, 5 August 2016

Crystal Structure of Human NADPH-Cytochrome P450 Reductase

Structural highlights

Disease

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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