UniProtKB/Swiss-Prot P16157: Variant p.Leu276Arg

Gene: ANK1
Chromosomal location: 8p11.2-p21.1
Variant information

Variant position:  276
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 Leucine (L) to Arginine (R) at position 276 (L276R, p.Leu276Arg).
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 (L) to large size and basic (R)
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:  Spherocytosis 1 (SPH1) [MIM:182900]: A form of spherocytosis, a hematologic disorder leading to chronic hemolytic anemia and characterized by numerous abnormally shaped erythrocytes which are generally spheroidal. SPH1 is characterized by severe hemolytic anemia. Inheritance can be autosomal dominant or autosomal recessive. Patients with homozygous mutations have a more severe disorder. {ECO:0000269|PubMed:11102985, ECO:0000269|PubMed:8640229}. 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 SPH1.
Any additional useful information about the variant.

Sequence information

Variant position:  276
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  1881
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 – 1881 Ankyrin-1
Repeat 271 – 300 ANK 8
Region 1 – 827 89 kDa domain
Alternative sequence 1 – 1725 Missing. In isoform Mu17, isoform Mu18, isoform Mu19, isoform Mu20, isoform 22 and isoform 23.

Literature citations

Low frequency of ankyrin mutations in hereditary spherocytosis: identification of three novel mutations.
Leite R.C.A.; Basseres D.S.; Ferreira J.S.; Alberto F.L.; Costa F.F.; Saad S.T.O.;
Hum. Mutat. 16:529-529(2000)
Cited for: VARIANTS SPH1 ARG-276 AND THR-1054;

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.