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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P16435: Variant p.Cys566Tyr

NADPH--cytochrome P450 reductase
Gene: POR
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Variant information Variant position: help 566 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help LP/P [Disclaimer] The variants are classified into three categories: LP/P, LB/B and US.
  • LP/P: likely pathogenic or pathogenic.
  • LB/B: likely benign or benign.
  • US: uncertain significance
Residue change: help From Cysteine (C) to Tyrosine (Y) at position 566 (C566Y, p.Cys566Tyr). Indicates the amino acid change of the variant. The one-letter and three-letter codes for amino acids used in UniProtKB/Swiss-Prot are those adopted by the commission on Biochemical Nomenclature of the IUPAC-IUB.
Physico-chemical properties: help Change from medium size and polar (C) to large size and aromatic (Y) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -2 The score within a Blosum matrix for the corresponding wild-type to variant amino acid change. The log-odds score measures the logarithm for the ratio of the likelihood of two amino acids appearing by chance. The Blosum62 substitution matrix is used. This substitution matrix contains scores for all possible exchanges of one amino acid with another:
  • Lowest score: -4 (low probability of substitution).
  • Highest score: 11 (high probability of substitution).
More information can be found on the following page
Variant description: help In DISPORD; significant reduction of activity. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 566 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 677 The length of the canonical sequence.
Location on the sequence: help ERAWLRQQGKEVGETLLYYG C RRSDEDYLYREELAQFHRDG The residue change on the sequence. Unless the variant is located at the beginning or at the end of the protein sequence, both residues upstream (20) and downstream (20) of the variant will be shown.
Residue conservation: help The multiple alignment of the region surrounding the variant against various orthologous sequences. 
Human                         ER-AWLRQQGK-----EVGETLLYYGCRRSDEDYLYREELAQFHR--DG

Mouse                         ER-AWLREQGK-----EVGETLLYYGCRRSDEDYLYREELA

Rat                           ER-AWLREQGK-----EVGETLLYYGCRRSDEDYLYREELA

Pig                           ER-AWLQEQGK-----EVGETLLYYGCRRSDEDYLYREELA

Bovine                        ER-AWLRQQGK-----EVGETLLYYGCRRSDEDYLYREELA

Rabbit                        ER-AWLRQQGK-----EVGETLLYYGCRRAAEDYLYREELA

Drosophila                    ER-QFLRDEGK-----TVGESILYFGCRKRSEDYIYESELE

Slime mold                    ELQHRNHSQQQ--------QSLLFFGCRSDTVDYIYREELE

Baker's yeast                 ERVAFLESQKKGGNNVSLGKHILFYGSRNTD-DFLYQDEWP

Fission yeast                 ER-ANLASKGV-----KVAKTLLFYGCQYSDKDFLYKEEWQ
Sequence annotation in neighborhood: help The regions or sites of interest surrounding the variant. In general the features listed are posttranslational modifications, binding sites, enzyme active sites, local secondary structure or other characteristics reported in the cited references. The "Sequence annotation in neighborhood" lines have a fixed format:
  • Type: the type of sequence feature.
  • Positions: endpoints of the sequence feature.
  • Description: contains additional information about the feature.
TypePositionsDescription
Chain 2 – 677 NADPH--cytochrome P450 reductase
Topological domain 43 – 677 Cytoplasmic
Beta strand 560 – 567



Literature citations
Congenital adrenal hyperplasia caused by mutant P450 oxidoreductase and human androgen synthesis: analytical study.
Arlt W.; Walker E.A.; Draper N.; Ivison H.E.; Ride J.P.; Hammer F.; Chalder S.M.; Borucka-Mankiewicz M.; Hauffa B.P.; Malunowicz E.M.; Stewart P.M.; Shackleton C.H.L.;
Lancet 363:2128-2135(2004)
Cited for: VARIANTS DISPORD ASP-178; PRO-284; HIS-454 AND TYR-566; CHARACTERIZATION OF VARIANTS DISPORD ASP-178; PRO-284; HIS-454 AND TYR-566; Mutant P450 oxidoreductase causes disordered steroidogenesis with and without Antley-Bixler syndrome.
Flueck C.E.; Tajima T.; Pandey A.V.; Arlt W.; Okuhara K.; Verge C.F.; Jabs E.W.; Mendonca B.B.; Fujieda K.; Miller W.L.;
Nat. Genet. 36:228-230(2004)
Cited for: VARIANTS ABS1 PRO-284; HIS-454 AND GLU-489; VARIANTS DISPORD TYR-566 AND PHE-605; CHARACTERIZATION OF VARIANTS ABS1 PRO-284; HIS-454 AND GLU-489; CHARACTERIZATION OF VARIANTS DISPORD TYR-566 AND PHE-605;
Disclaimer: Any medical or genetic information present in this entry is provided for research, educational and informational purposes only. They are not in any way intended to be used as a substitute for professional medical advice, diagnostic, treatment or care.