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UniProtKB/Swiss-Prot P08514: Variant p.Ile405Thr

Integrin alpha-IIb
Gene: ITGA2B
Variant information

Variant position:  405
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Disease [Disclaimer]
The variants are classified into three categories: Disease, Polymorphism and Unclassified.
  • Disease: Variants implicated in disease according to literature reports.
  • Polymorphism: Variants not reported to be implicated in disease.
  • Unclassified: Variants with uncertain implication in disease according to literature reports. Evidence against or in favor of a pathogenic role is limited and/or conflicting.

Residue change:  From Isoleucine (I) to Threonine (T) at position 405 (I405T, p.Ile405Thr).
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 medium size and hydrophobic (I) to medium size and polar (T)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -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:  In GT; expression of mutant subunit alpha-IIb/bet-3 is 11% of control; mutant pro-alpha-IIb subunit is retained in the endoplasmic reticulum.
Any additional useful information about the variant.

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



Sequence information

Variant position:  405
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  1039
The length of the canonical sequence.

Location on the sequence:   GRFGSAIAPLGDLDRDGYND  I AVAAPYGGPSGRGQVLVFLG
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                         GRFGSAIAPLGDLDRDGYNDIAVAAPYGGPSGRGQVLVFLG

Mouse                         GRFGSAIAPLGDLNRDGYNDIAVAAPYGGPSGQGQVLIFLG

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 32 – 1039 Integrin alpha-IIb
Chain 32 – 887 Integrin alpha-IIb heavy chain
Topological domain 32 – 993 Extracellular
Repeat 373 – 432 FG-GAP 6
Beta strand 404 – 409


Literature citations

Glanzmann's thrombasthenia: identification of 19 new mutations in 30 patients.
D'Andrea G.; Colaizzo D.; Vecchione G.; Grandone E.; Di Minno G.; Margaglione M.;
Thromb. Haemost. 87:1034-1042(2002)
Cited for: VARIANTS GT VAL-139; ALA-176; GLU-267; ASP-380; THR-405; ASP-581; ARG-705; VAL-752 AND PRO-755;

Two novel mutations in the alpha IIb calcium-binding domains identify hydrophobic regions essential for alpha IIbbeta 3 biogenesis.
Mitchell W.B.; Li J.H.; Singh F.; Michelson A.D.; Bussel J.; Coller B.S.; French D.L.;
Blood 101:2268-2276(2003)
Cited for: VARIANTS GT PHE-329 AND THR-405; CHARACTERIZATION OF VARIANTS GT PHE-329 AND THR-405;

AlphaIIbbeta3 integrin: new allelic variants in Glanzmann thrombasthenia, effects on ITGA2B and ITGB3 mRNA splicing, expression, and structure-function.
Jallu V.; Dusseaux M.; Panzer S.; Torchet M.F.; Hezard N.; Goudemand J.; de Brevern A.G.; Kaplan C.;
Hum. Mutat. 31:237-246(2010)
Cited for: VARIANTS GT THR-405; THR-596; ARG-705; PRO-778; PHE-934; LEU-957; MET-982 AND THR-989; CHARACTERIZATION OF VARIANTS GT PHE-934 AND LEU-957;

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.