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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q8N4T0: Variant p.Ala270Val

Carboxypeptidase A6
Gene: CPA6
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Variant information Variant position: help 270 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 Alanine (A) to Valine (V) at position 270 (A270V, p.Ala270Val). 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 Change from small size and hydrophobic (A) to medium size and hydrophobic (V) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help 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

Variant description: help In FEB11; affects protein secretion presumably by altering protein folding or stability. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 270 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 437 The length of the canonical sequence.
Location on the sequence: help DRFWRKTRSRNSRFRCRGVD A NRNWKVKWCDEGASMHPCDD 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                         DRFWRKTRSRNSRFRCRGVDANRNWKVKWCDEGASMHPCDD

Mouse                         DRFWRKTRSRDSKFRCRGVDANRNWKVKWCDEGASAHPCDD

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 130 – 437 Carboxypeptidase A6
Domain 138 – 432 Peptidase M14
Binding site 254 – 254
Disulfide bond 265 – 288
Alternative sequence 93 – 437 Missing. In isoform 3.



Literature citations
Carboxypeptidase A6 gene (CPA6) mutations in a recessive familial form of febrile seizures and temporal lobe epilepsy and in sporadic temporal lobe epilepsy.
Salzmann A.; Guipponi M.; Lyons P.J.; Fricker L.D.; Sapio M.; Lambercy C.; Buresi C.; Bencheikh B.O.; Lahjouji F.; Ouazzani R.; Crespel A.; Chaigne D.; Malafosse A.;
Hum. Mutat. 33:124-135(2012)
Cited for: TISSUE SPECIFICITY; VARIANT ETL5 ARG-267; VARIANT FEB11 VAL-270; CHARACTERIZATION OF VARIANT ETL5 ARG-267; CHARACTERIZATION OF VARIANT FEB11 VAL-270;
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.