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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P05106: Variant p.Leu222Pro

Integrin beta-3
Gene: ITGB3
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Variant information Variant position: help 222 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 Leucine (L) to Proline (P) at position 222 (L222P, p.Leu222Pro). 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 Similar physico-chemical property. Both residues are medium size and hydrophobic. The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -3 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 GT2; variant form. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 222 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 788 The length of the canonical sequence.
Location on the sequence: help PCYDMKTTCLPMFGYKHVLT L TDQVTRFNEEVKKQSVSRNR 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                         PCYDMKTTCLPMFGYKHVLTLTDQVTRFNEEVKKQSVSRNR

Mouse                         PCYNMKNACLPMFGYKHVLTLTDQVSRFNEEVKKQSVSRNR

Rat                           PCYTMKSTCLPMFGYKHVLTLTDQVTRFNDEVKKQSVSRNR

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 27 – 788 Integrin beta-3
Topological domain 27 – 718 Extracellular
Domain 135 – 377 VWFA
Binding site 241 – 241 in LIMBS binding site
Disulfide bond 39 – 461
Beta strand 215 – 224



Literature citations
A novel 196Leu to Pro substitution in the beta3 subunit of the alphaIIbbeta3 integrin in a patient with a variant form of Glanzmann thrombasthenia.
Nurden A.T.; Ruan J.; Pasquet J.-M.; Gauthier B.; Combrie R.; Kunicki T.; Nurden P.;
Platelets 13:101-111(2002)
Cited for: VARIANT GT2 PRO-222; 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 GT2 TYR-64; ARG-144; PRO-222; ASP-247 AND MET-279; CHARACTERIZATION OF VARIANTS TYR-64; PRO-222; ASP-247 AND MET-279; SUBCELLULAR LOCATION;
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.