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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P02452: Variant p.Gly896Cys

Collagen alpha-1(I) chain
Gene: COL1A1
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Variant information Variant position: help 896 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help 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: help From Glycine (G) to Cysteine (C) at position 896 (G896C, p.Gly896Cys). 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: help Change from glycine (G) to medium size and polar (C) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -3 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: help In OI2; results in slow procollagen cleavage by N-proteinase. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 896 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 1464 The length of the canonical sequence.
Location on the sequence: help FPGAAGRVGPPGPSGNAGPP G PPGPAGKEGGKGPRGETGPA 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: help The multiple alignment of the region surrounding the variant against various orthologous sequences. 
Human                         FPGAAGRVGPPGPSGNAGPPGPPGPAGKEGGKGPRGETGPA

                              FPGAAGRVGPPGPSGNAGPPGPPGPAGKEGGKGARGETGPA

Mouse                         FPGAAGRVGPPGPSGNAGPPGPPGPVGKEGGKGPRGETGPA

Rat                           FPGAAGRVGPPGPSGNAGPPGPPGPVGKEGGKGPRGETGPA

Bovine                        FPGAAGRVGPPGPSGNAGPPGPPGPAGKEGSKGPRGETGPA

Chicken                       FPGAAGRVGPPGPSGNIGLPGPPGPAGKZGSKGPRGETGPA
Sequence annotation in neighborhood: help 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 162 – 1218 Collagen alpha-1(I) chain
Region 98 – 1214 Disordered
Region 179 – 1192 Triple-helical region
Compositional bias 888 – 902 Pro residues
Modified residue 877 – 877 4-hydroxyproline
Modified residue 885 – 885 3-hydroxyproline
Modified residue 886 – 886 4-hydroxyproline
Modified residue 895 – 895 4-hydroxyproline
Modified residue 898 – 898 4-hydroxyproline



Literature citations
Osteogenesis imperfecta. The position of substitution for glycine by cysteine in the triple helical domain of the pro alpha 1(I) chains of type I collagen determines the clinical phenotype.
Starman B.J.; Eyre D.R.; Charbonneau H.; Harrylock M.; Weis M.A.; Weiss L.; Graham J.M. Jr.; Byers P.H.;
J. Clin. Invest. 84:1206-1214(1989)
Cited for: VARIANT OI1 CYS-272; VARIANT OI3 CYS-704; VARIANT OI2 CYS-896; Type I procollagens containing substitutions of aspartate, arginine, and cysteine for glycine in the pro alpha 1 (I) chain are cleaved slowly by N-proteinase, but only the cysteine substitution introduces a kink in the molecule.
Lightfoot S.J.; Holmes D.F.; Brass A.; Grant M.E.; Byers P.H.; Kadler K.E.;
J. Biol. Chem. 267:25521-25528(1992)
Cited for: VARIANTS OI2 ASP-275; ARG-728; CYS-896 AND ASP-1061; CHARACTERIZATION OF VARIANTS OI2 ASP-275; ARG-728; CYS-896 AND ASP-1061;
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.