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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P26006: Variant p.Arg274Gln

Integrin alpha-3
Gene: ITGA3
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Variant information Variant position: help 274 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 Arginine (R) to Glutamine (Q) at position 274 (R274Q, p.Arg274Gln). 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 large size and basic (R) to medium size and polar (Q) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help 1 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 JEB7. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 274 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 1051 The length of the canonical sequence.
Location on the sequence: help MQVGSFILHPKNITIVTGAP R HRHMGAVFLLSQEAGGDLRR 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                         MQVGSF-ILHPKN-ITIVTGAPRHRHMGAVFLLSQEAGGDLRR

Mouse                         VQVGNA-ILHPTDIITVVTGAPRHQHMGAVFLLKQESGGDL

Bovine                        MQVGSA-ILHPTN-ITIVTGAPRHQHVGAVFLLSQEAGGDL

Drosophila                    VSSGFFDSSNPTKLLYVATAPQANKQSGEAYIFDVR-GKSI
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 33 – 1051 Integrin alpha-3
Chain 33 – 872 Integrin alpha-3 heavy chain
Topological domain 33 – 991 Extracellular
Repeat 236 – 292 FG-GAP 4
Glycosylation 265 – 265 N-linked (GlcNAc...) asparagine



Literature citations
Viable phenotype of ILNEB syndrome without nephrotic impairment in siblings heterozygous for unreported integrin alpha3 mutations.
Colombo E.A.; Spaccini L.; Volpi L.; Negri G.; Cittaro D.; Lazarevic D.; Zirpoli S.; Farolfi A.; Gervasini C.; Cubellis M.V.; Larizza L.;
Orphanet J. Rare Dis. 11:136-136(2016)
Cited for: VARIANTS JEB7 ARG-125 AND GLN-274;
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.