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UniProtKB/Swiss-Prot P26367: Variant p.Ala321Thr

Paired box protein Pax-6
Gene: PAX6
Variant information

Variant position:  321
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  US
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:  From Alanine (A) to Threonine (T) at position 321 (A321T, p.Ala321Thr).
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 small size and hydrophobic (A) to medium size and polar (T)
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

Variant description:  Shows about two-fold higher binding efficiency than the normal wild-type protein; transcriptional activation ability is about 89% of that of the wild-type protein.
Any additional useful information about the variant.



Sequence information

Variant position:  321
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  422
The length of the canonical sequence.

Location on the sequence:   QPTTPVSSFTSGSMLGRTDT  A LTNTYSALPPMPSFTMANNL
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                         QPTTPVSSFTSGSM------LGRTDTALTNTYSALPPMPSFTMANNL

Mouse                         QPTTPVSSFTSGSM------LGRTDTALTNTYSALPPMPSF

Rat                           QPTTPVSSFTSGSM------LGRTDTALTNTYSALPPMPSF

Bovine                        QPTTPVSSFTSGSM------LGRTDTALTNTYSALPPMPSF

Xenopus laevis                QPTTPVSSFTSGSM------LGRTDTALTNSYSALPPMPSF

Zebrafish                     QPTTPV-SFTSGSM------LGRSDTALTNTYSALPPMPSF

Drosophila                    PAISPRLNFNSGSFGAMYSNMHHTALSMSDSYGAVTPIPSF

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 – 422 Paired box protein Pax-6


Literature citations

Missense mutations in the DNA-binding region and termination codon in PAX6.
Chao L.-Y.; Mishra R.; Strong L.C.; Saunders G.F.;
Hum. Mutat. 21:138-145(2003)
Cited for: VARIANTS AN1 ARG-46; ARG-52; THR-56; ASP-73 AND LYS-87; VARIANT THR-321; CHARACTERIZATION OF VARIANTS AN1 ARG-46; ARG-52; LEU-53; THR-56 AND ASP-73; CHARACTERIZATION OF VARIANT THR-321;

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.