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UniProtKB/Swiss-Prot Q9HBA0: Variant p.Arg271Pro

Transient receptor potential cation channel subfamily V member 4
Gene: TRPV4
Chromosomal location: 12q24.1
Variant information

Variant position:  271
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 Arginine (R) to Proline (P) at position 271 (R271P, p.Arg271Pro).
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 large size and basic (R) to medium size and hydrophobic (P)
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

Involvement in disease:  Digital arthropathy-brachydactyly, familial (FDAB) [MIM:606835]: A disorder characterized by irregularities in the proximal articular surfaces of the distal interphalangeal joints of the hand. Individuals appear normal at birth, with no clinical or radiographic evidence of a developmental skeletal dysplasia. The earliest changes appear during the first decade of life. By adulthood, all interphalangeal, metacarpophalangeal, and metatarsophalangeal joints are affected by a deforming, painful osteoarthritis. The remainder of the skeleton is clinically and radiographically unaffected. {ECO:0000269|PubMed:21964574}. 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 FDAB; poorly expressed on the cell surface; mutant channels show a significantly reduced response to agonists.
Any additional useful information about the variant.

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

Sequence information

Variant position:  271
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  871
The length of the canonical sequence.

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.





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.

Chain 1 – 871 Transient receptor potential cation channel subfamily V member 4
Topological domain 1 – 469 Cytoplasmic
Modified residue 253 – 253 Phosphotyrosine
Alternative sequence 239 – 285 Missing. In isoform 4 and isoform 6.
Mutagenesis 251 – 251 K -> E. No effect on channel activity. No effect on interaction with membranes enriched in phosphatidylinositol-2,4-bisphosphate.
Helix 271 – 273

Literature citations

Mutations in TRPV4 cause an inherited arthropathy of hands and feet.
Lamande S.R.; Yuan Y.; Gresshoff I.L.; Rowley L.; Belluoccio D.; Kaluarachchi K.; Little C.B.; Botzenhart E.; Zerres K.; Amor D.J.; Cole W.G.; Savarirayan R.; McIntyre P.; Bateman J.F.;
Nat. Genet. 43:1142-1146(2011)

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.