UniProtKB/Swiss-Prot O14949: Variant p.Ser45Phe

Cytochrome b-c1 complex subunit 8
Gene: UQCRQ
Chromosomal location: 5q31.1
Variant information

Variant position:  45
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Disease [Disclaimer]
The variants are classified into three categories: Disease, Polymorphism and Unclassified.
  • Disease: Variants have been found in patients and disease-association is reported in literature. However, this classification is not a definitive assessment of variant pathogenicity.
  • Polymorphism: No disease-association has been reported.
  • Unclassified: Variants have been found in patients but disease-association remains unclear.

Residue change:  From Serine (S) to Phenylalanine (F) at position 45 (S45F, p.Ser45Phe).
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 large size and aromatic (F)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -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:  In MC3DN4.
Any additional useful information about the variant.

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



Sequence information

Variant position:  45
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  82
The length of the canonical sequence.

Location on the sequence:   RAYPHVFTKGIPNVLRRIRE  S FFRVVPQFVVFYLIYTWGTE
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                         RAYPHVFTKGIPNVLRRIRESFFRVVPQFVVFYLIYTWGTE--

Mouse                         RAFPSYFSKGIPNVLRRTRERILRVAPPFVVVYLIYTWGNQ

Rat                           RAFPHYFSKGIPNVLRRTRERILRVAPPFVLFYLIYTWGNQ

Bovine                        RAFPHYFSKGIPNVLRRTRACILRVAPPFVAFYLVYTWGTQ

Slime mold                    KLFVNYFKNAIPHLRRGVKDNFFCSVPYFAALYITVNWANE

Baker's yeast                 KPLQGIFHNAVFNSFRRFKSQFLYVLIPAGIYWYWWKNGNE

Fission yeast                 RPMAGFFKTSTQNMFRRVMTEGLYVAIPFGIAYYIYCWGKE

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 – 82 Cytochrome b-c1 complex subunit 8
Modified residue 33 – 33 N6-acetyllysine; alternate
Modified residue 33 – 33 N6-succinyllysine; alternate
Cross 33 – 33 Glycyl lysine isopeptide (Lys-Gly) (interchain with G-Cter in ubiquitin); alternate


Literature citations

Mitochondrial complex III deficiency associated with a homozygous mutation in UQCRQ.
Barel O.; Shorer Z.; Flusser H.; Ofir R.; Narkis G.; Finer G.; Shalev H.; Nasasra A.; Saada A.; Birk O.S.;
Am. J. Hum. Genet. 82:1211-1216(2008)
Cited for: VARIANT MC3DN4 PHE-45;

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.