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UniProtKB/Swiss-Prot P02458: Variant p.Gly318Arg

Collagen alpha-1(II) chain
Gene: COL2A1
Variant information

Variant position:  318
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  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:  From Glycine (G) to Arginine (R) at position 318 (G318R, p.Gly318Arg).
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 glycine (G) to large size and basic (R)
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 DRRD.
Any additional useful information about the variant.

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



Sequence information

Variant position:  318
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  1487
The length of the canonical sequence.

Location on the sequence:   AKGEAGAPGVKGESGSPGEN  G SPGPMGPRGLPGERGRTGPA
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                         AKGEAGAPGVKGESGSPGENGSPGPMGPRGLPGERGRTGPA

Mouse                         AKGEAGAPGVKGESGSPGENGSPGPMGPRGLPGERGRTGPA

Rat                           AKGEAGAPGVKGESGSPGENGSPGPMGPRGLPGERGRTGPA

Bovine                        AKGEAGAPGVKGESGSPGENGSPGPMGPRGLPGERGRTGPA

Xenopus laevis                AKGEAGAAGAKGEGGATGEAGSPGPMGPRGLPGERGRPGSS

Xenopus tropicalis            SKGEAGAAGAKGEGGATGEAGSPGPMGPRGLPGERGRPGAS

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 182 – 1241 Collagen alpha-1(II) chain
Region 97 – 1237 Disordered
Region 201 – 1214 Triple-helical region
Modified residue 299 – 299 5-hydroxylysine
Modified residue 308 – 308 5-hydroxylysine
Glycosylation 299 – 299 O-linked (Gal...) hydroxylysine
Glycosylation 308 – 308 O-linked (Gal...) hydroxylysine
Alternative sequence 1 – 1219 Missing. In isoform 3.


Literature citations

A novel mutation of COL2A1 resulting in dominantly inherited rhegmatogenous retinal detachment.
Richards A.J.; Meredith S.; Poulson A.; Bearcroft P.; Crossland G.; Baguley D.M.; Scott J.D.; Snead M.P.;
Invest. Ophthalmol. Vis. Sci. 46:663-668(2005)
Cited for: VARIANTS DRRD ARG-318 AND PHE-667;

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.