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UniProtKB/Swiss-Prot Q02388: Variant p.Gly2028Arg

Collagen alpha-1(VII) chain
Gene: COL7A1
Variant information

Variant position:  2028
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 2028 (G2028R, p.Gly2028Arg).
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 DDEB and EBP.
Any additional useful information about the variant.

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



Sequence information

Variant position:  2028
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  2944
The length of the canonical sequence.

Location on the sequence:   RGDPGPQGPPGLALGERGPP  G PSGLAGEPGKPGIPGLPGRA
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                         RGDPGPQGPPGLALGERGPPGPSGLAGEPGKPGIPGLPGRA

Mouse                         RGDPGPQGPPGLALGERGPPGPPGLAGEPGKPGIPGLPGRA

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 17 – 2944 Collagen alpha-1(VII) chain
Region 1254 – 2784 Triple-helical region
Region 1963 – 2782 Disordered
Modified residue 2036 – 2036 4-hydroxyproline
Modified residue 2039 – 2039 4-hydroxyproline


Literature citations

A de novo glycine substitution mutation in the collagenous domain of COL7A1 in dominant dystrophic epidermolysis bullosa.
Lee J.Y.-Y.; Li C.; Chao S.-C.; Pulkkinen L.; Uitto J.;
Arch. Dermatol. Res. 292:159-163(2000)
Cited for: VARIANT DDEB ARG-2028;

Glycine substitution mutations by different amino acids in the same codon of COL7A1 lead to heterogeneous clinical phenotypes of dominant dystrophic epidermolysis bullosa.
Murata T.; Masunaga T.; Shimizu H.; Takizawa Y.; Ishiko A.; Hatta N.; Nishikawa T.;
Arch. Dermatol. Res. 292:477-481(2000)
Cited for: VARIANT DDEB ALA-2028; VARIANT EBP ARG-2028;

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.