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UniProtKB/Swiss-Prot P00387: Variant p.Ser66Pro

NADH-cytochrome b5 reductase 3
Gene: CYB5R3
Variant information

Variant position:  66
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Polymorphism
The variants are classified into three categories: Disease, Polymorphism and Unclassified.
  • Disease: Variants implicated in disease according to literature reports.
  • Polymorphism: Variants not reported to be implicated in disease.
  • Unclassified: Variants with uncertain implication in disease according to literature reports. Evidence against or in favor of a pathogenic role is limited and/or conflicting.

Residue change:  From Serine (S) to Proline (P) at position 66 (S66P, p.Ser66Pro).
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:  Change from small size and polar (S) to medium size and hydrophobic (P)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -1
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

Polymorphism:  Ser-117 seems to only be found in persons of African origin. The allele frequency is 0.23 in African Americans. It was not found in Caucasians, Asians, Indo-Aryans, or Arabs. There seems to be no effect on the enzyme activity.
Additional information on the polymorphism described.

Other resources:  
Links to websites of interest for the variant.



Sequence information

Variant position:  66
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  301
The length of the canonical sequence.

Location on the sequence:   RLIDREIISHDTRRFRFALP  S PQHILGLPVGQHIYLSARID
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: 
The multiple alignment of the region surrounding the variant against various orthologous sequences.

Human                         RLIDREIISHDTRRFRFALPSPQHILGLPVGQHIYLSARID

                              RLIDKEVINHDTRRFRFALPSPQHILGLPVGQHIYLSARID

Mouse                         RLIDKEVISPDTRRFRFALPSPQHILGLPIGQHIYLSTRID

Rat                           RLIDKEIISHDTRRFRFALPSPQHILGLPIGQHIYLSTRID

Bovine                        RLIDKEVISHDTRRFRFALPSPEHILGLPVGQHIYLSARID

Sequence annotation in neighborhood:  
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 – 301 NADH-cytochrome b5 reductase 3 membrane-bound form
Chain 27 – 301 NADH-cytochrome b5 reductase 3 soluble form
Domain 40 – 152 FAD-binding FR-type


Literature citations

The organization and the complete nucleotide sequence of the human NADH-cytochrome b5 reductase gene.
Tomatsu S.; Kobayashi Y.; Fukumaki Y.; Yubisui T.; Orii T.; Sakaki Y.;
Gene 80:353-361(1989)
Cited for: NUCLEOTIDE SEQUENCE [GENOMIC DNA]; VARIANT PRO-66;

Submission
Lan F.;
Cited for: NUCLEOTIDE SEQUENCE [MRNA] (ISOFORM 1); VARIANT PRO-66; VARIANTS HM GLN-58; PRO-73 AND TYR-204;

Molecular cloning of cDNAs of human liver and placenta NADH-cytochrome b5 reductase.
Yubisui T.; Naitoh Y.; Zenno S.; Tamura M.; Takeshita M.; Sakaki Y.;
Proc. Natl. Acad. Sci. U.S.A. 84:3609-3613(1987)
Cited for: NUCLEOTIDE SEQUENCE [MRNA] OF 8-301 (ISOFORM 1); VARIANT PRO-66;

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.