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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P02452: Variant p.Gly266Glu

Collagen alpha-1(I) chain
Gene: COL1A1
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Variant information Variant position: help 266 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 Glutamate (E) at position 266 (G266E, p.Gly266Glu). 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 acidic (E) 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 OI1 and OIEDS1; affects collagen fibril organization; collagen dermal fibrils in patients have smaller diameters than in age-matched controls. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 266 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 PPGPQGARGLPGTAGLPGMK G HRGFSGLDGAKGDAGPAGPK 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                         PPGPQGARGLPGTAGLPGMKGHRGFSGLDGAKGDAGPAGPK

                              PPGPQGARGLPGTAGLPGMKGHRGFSGLDGAKGDAGPAGPK

Mouse                         PPGPQGARGLPGTAGLPGMKGHRGFSGLDGAKGDAGPAGPK

Rat                           PPGPQGARGLPGTAGLPGMKGHRGFSGLDGAKGDTGPAGPK

Bovine                        PPGPQGARGLPGTAGLPGMKGHRGFSGLDGAKGDAGPAGPK

Chicken                       PPGPQGARGLPGTAGLPGMKGHRGFSGLDGAKGQPGPAGPK

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
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
Beta strand 264 – 266



Literature citations
Mutations near amino end of alpha1(I) collagen cause combined osteogenesis imperfecta/Ehlers-Danlos syndrome by interference with N-propeptide processing.
Cabral W.A.; Makareeva E.; Colige A.; Letocha A.D.; Ty J.M.; Yeowell H.N.; Pals G.; Leikin S.; Marini J.C.;
J. Biol. Chem. 280:19259-19269(2005)
Cited for: INVOLVEMENT IN OIEDS1; VARIANTS OIEDS1 ASP-191; VAL-203; ARG-212; GLU-254 AND GLU-266; CHARACTERIZATION OF VARIANTS OIEDS1 ASP-191; VAL-203; ARG-212; GLU-254 AND GLU-266; Mutations in type I collagen genes in Japanese osteogenesis imperfecta patients.
Kataoka K.; Ogura E.; Hasegawa K.; Inoue M.; Seino Y.; Morishima T.; Tanaka H.;
Pediatr. Int. 49:564-569(2007)
Cited for: VARIANTS OI1 GLU-266 AND SER-287; VARIANT OI4 SER-353;
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.