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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P02458: Variant p.Gly891Arg

Collagen alpha-1(II) chain
Gene: COL2A1
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Variant information Variant position: help 891 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 Arginine (R) at position 891 (G891R, p.Gly891Arg). 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 large size and basic (R) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -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: help In ACG2 and SEDC. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 891 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 1487 The length of the canonical sequence.
Location on the sequence: help APGPQGPTGVTGPKGARGAQ G PPGATGFPGAAGRVGPPGSN 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                         APGPQGPTGVTGPKGARGAQGPPGATGFPGAAGRVGPPGSN

Mouse                         APGPQGPTGVTGPKGARGAQGPPGATGFPGAAGRVGPPGAN

Rat                           APGPQGPTGVTGPKGARGAQGPPGATGFPGAAGRVGPPGSN

Bovine                        APGPQGPTGVTGPKGARGAQGPPGATGFPGAAGRVGPPGSN

Xenopus laevis                APGPQGPTGVFGPKGARGAQGPAGATGFPGAAGRVGTPGPN

Xenopus tropicalis            APGPQGPTGVNGPKGARGAQGPPGATGFPGAAGRVGPPGPN
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 182 – 1241 Collagen alpha-1(II) chain
Region 97 – 1237 Disordered
Region 201 – 1214 Triple-helical region
Modified residue 907 – 907 3-hydroxyproline
Modified residue 908 – 908 4-hydroxyproline
Alternative sequence 1 – 1219 Missing. In isoform 3.



Literature citations
A radiographic, morphologic, biochemical and molecular analysis of a case of achondrogenesis type II resulting from substitution for a glycine residue (Gly691-->Arg) in the type II collagen trimer.
Mortier G.R.; Wilkin D.J.; Wilcox W.R.; Rimoin D.L.; Lachman R.S.; Eyre D.R.; Cohn D.H.;
Hum. Mol. Genet. 4:285-288(1995)
Cited for: VARIANT ACG2 ARG-891; Three new point mutations in type II procollagen (COL2A1) and identification of a fourth family with the COL2A1 Arg519-->Cys base substitution using conformation sensitive gel electrophoresis.
Williams C.J.; Rock M.; Considine E.L.; McCarron S.; Gow P.; Ladda R.; McLain D.; Michels V.M.; Murphy W.; Prockop D.J.; Ganguly A.;
Hum. Mol. Genet. 4:309-312(1995)
Cited for: VARIANT CZECHD CYS-275; VARIANT SEDC SER-1176; VARIANT OSCDP CYS-719; VARIANT HYPOCHONDROGENESIS ARG-891; VARIANT ACG2 ARG-1188;
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.