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UniProtKB/Swiss-Prot P02452: Variant p.Gly257Arg

Collagen alpha-1(I) chain
Gene: COL1A1
Variant information

Variant position:  257
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 257 (G257R, p.Gly257Arg).
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 OI4.
Any additional useful information about the variant.

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

Sequence information

Variant position:  257
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  1464
The length of the canonical sequence.

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.







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.

Chain 162 – 1218 Collagen alpha-1(I) chain
Region 179 – 1192 Triple-helical region
Modified residue 241 – 241 4-hydroxyproline
Modified residue 247 – 247 4-hydroxyproline
Modified residue 256 – 256 4-hydroxyproline
Modified residue 262 – 262 4-hydroxyproline
Modified residue 265 – 265 5-hydroxylysine; alternate
Modified residue 271 – 271 Phosphoserine
Glycosylation 265 – 265 O-linked (Gal...) hydroxylysine; alternate

Literature citations

Osteogenesis imperfecta: clinical, biochemical and molecular findings.
Venturi G.; Tedeschi E.; Mottes M.; Valli M.; Camilot M.; Viglio S.; Antoniazzi F.; Tato L.;
Clin. Genet. 70:131-139(2006)
Cited for: VARIANTS OI3 VAL-203 AND SER-821; VARIANTS OI4 ARG-257 AND SER-683;

Mutational spectrum of type I collagen genes in Korean patients with osteogenesis imperfecta.
Lee K.S.; Song H.R.; Cho T.J.; Kim H.J.; Lee T.M.; Jin H.S.; Park H.Y.; Kang S.; Jung S.C.; Koo S.K.;
Hum. Mutat. 27:599-599(2006)
Cited for: VARIANTS OI1/OI3/OI4 ARG-194; ASP-242; ARG-257; SER-722; SER-767; SER-821 AND SER-1058;

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.