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UniProtKB/Swiss-Prot O95786: Variant p.Cys268Phe

Antiviral innate immune response receptor RIG-I
Gene: DDX58
Variant information

Variant position:  268
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 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 Cysteine (C) to Phenylalanine (F) at position 268 (C268F, p.Cys268Phe).
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 medium size and polar (C) 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 SGMRT2; results in constitutive activation and enhanced interferon-mediated signaling.
Any additional useful information about the variant.

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



Sequence information

Variant position:  268
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  925
The length of the canonical sequence.

Location on the sequence:   LELALPAMKGKNTIICAPTG  C GKTFVSLLICEHHLKKFPQG
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                         LELALPAMKGKNTIICAPTGCGKTFVSLLICEHHLKKFPQG

Mouse                         LELALPAKKGKNTIICAPTGCGKTFVSLLICEHHLKKFPCG

Pig                           LELALPAQNGKNTIICAPTGCGKTFVSLLICEHHLKKFPRG

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 1 – 925 Antiviral innate immune response receptor RIG-I
Domain 251 – 430 Helicase ATP-binding
Nucleotide binding 264 – 271 ATP
Region 218 – 925 Interaction with ZC3HAV1
Mutagenesis 270 – 270 K -> A. No IRF3 signaling activity.


Literature citations

Mutations in DDX58, which encodes RIG-I, cause atypical Singleton-Merten syndrome.
Jang M.A.; Kim E.K.; Now H.; Nguyen N.T.; Kim W.J.; Yoo J.Y.; Lee J.; Jeong Y.M.; Kim C.H.; Kim O.H.; Sohn S.; Nam S.H.; Hong Y.; Lee Y.S.; Chang S.A.; Jang S.Y.; Kim J.W.; Lee M.S.; Lim S.Y.; Sung K.S.; Park K.T.; Kim B.J.; Lee J.H.; Kim D.K.; Kee C.; Ki C.S.;
Am. J. Hum. Genet. 96:266-274(2015)
Cited for: INVOLVEMENT IN SGMRT2; VARIANTS SGMRT2 PHE-268 AND ALA-373; CHARACTERIZATION OF VARIANTS SGMRT2 PHE-268 AND ALA-373;

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.