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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P21549: Variant p.Ala280Val

Alanine--glyoxylate aminotransferase
Gene: AGXT
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Variant information Variant position: help 280 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help LB/B 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 280 (A280V, p.Ala280Val). 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

Polymorphism: help Variant p.Pro11Leu acts synergistically with other variants in AGXT producing specific enzymatic phenotypes in HP1 patients. The combined presence of variants p.Pro11Leu and p.Ile340Met defines the minor AGXT allele, whereas their absence defines the major allele. The minor allele has frequencies of 20% in normal European and North American populations, and 50% in HP1 patients. Additional information on the polymorphism described.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 280 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 392 The length of the canonical sequence.
Location on the sequence: help YHHTIPVISLYSLRESLALI A EQGLENSWRQHREAAAYLHG 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.
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 1 – 392 Alanine--glyoxylate aminotransferase
Helix 266 – 282



Literature citations
The major allele of the alanine:glyoxylate aminotransferase gene: nine novel mutations and polymorphisms associated with primary hyperoxaluria type 1.
Coulter-Mackie M.B.; Lian Q.; Applegarth D.; Toone J.;
Mol. Genet. Metab. 86:172-178(2005)
Cited for: VARIANTS HP1 ARG-161 AND LEU-218; VARIANTS THR-279 AND VAL-280;
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.