Home  |  Contact

UniProtKB/Swiss-Prot Q9H5I5: Variant p.Ile802Phe

Piezo-type mechanosensitive ion channel component 2
Gene: PIEZO2
Variant information

Variant position:  802
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 Phenylalanine (F) at position 802 (I802F, p.Ile802Phe).
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 large size and aromatic (F)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  0
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

Involvement in disease:  Arthrogryposis, distal, 5 (DA5) [MIM:108145]: A form of distal arthrogryposis, a disease characterized by congenital joint contractures that mainly involve two or more distal parts of the limbs, in the absence of a primary neurological or muscle disease. DA5 features include ocular abnormalities, typically ptosis, ophthalmoplegia and/or strabismus, in addition to contractures of the skeletal muscles. Some patients have pulmonary hypertension as a result of restrictive lung disease. {ECO:0000269|PubMed:23487782, ECO:0000269|PubMed:24726473}. Note=The disease is caused by mutations affecting the gene represented in this entry.
The name and a short description of the disease associated with the variant. For more information about the disease, the user can refer to OMIM, following the link provided after the disease acronym.

Variant description:  In DA5; recovers faster from inactivation.
Any additional useful information about the variant.

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



Sequence information

Variant position:  802
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  2752
The length of the canonical sequence.

Location on the sequence:   FTVAELFTRIFIPTSFLLVC  I LHLHYFHDRFLELTDLKSIP
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                         FTVAELFTRIFIPTSFLLVCILHLHYFHDRFLELTDLKSIP

Mouse                         FTVAELFTRIFIPTSFLLVCILHLHYFHDRFLELTDLKSIP

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 1 – 2752 Piezo-type mechanosensitive ion channel component 2
Transmembrane 782 – 802 Helical
Alternative sequence 1 – 2043 Missing. In isoform 3.


Literature citations

Gain-of-function mutations in the mechanically activated ion channel PIEZO2 cause a subtype of distal arthrogryposis.
Coste B.; Houge G.; Murray M.F.; Stitziel N.; Bandell M.; Giovanni M.A.; Philippakis A.; Hoischen A.; Riemer G.; Steen U.; Steen V.M.; Mathur J.; Cox J.; Lebo M.; Rehm H.; Weiss S.T.; Wood J.N.; Maas R.L.; Sunyaev S.R.; Patapoutian A.;
Proc. Natl. Acad. Sci. U.S.A. 110:4667-4672(2013)
Cited for: VARIANTS DA5 PHE-802 AND GLU-2727 DEL; CHARACTERIZATION OF VARIANTS DA5 PHE-802 AND GLU-2727 DEL;

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.