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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P54098: Variant p.His932Tyr

DNA polymerase subunit gamma-1
Gene: POLG
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Variant information Variant position: help 932 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 Histidine (H) to Tyrosine (Y) at position 932 (H932Y, p.His932Tyr). 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 medium size and polar (H) to large size and aromatic (Y) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help 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

Variant description: help In SANDO and PEOB1; sporadic case. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 932 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 1239 The length of the canonical sequence.
Location on the sequence: help GCTAFGWMTLQGRKSRGTDL H SKTATTVGISREHAKIFNYG 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                         GCTAFGWMTLQGRKSRGTDLHSKTATTVGISREHAKIFNYG

Mouse                         GCTAFGWMTLQGRKSRGTDLHSKTAATVGISREHAKIFNYG

Rat                           GCTAFGWMTLQGRKSRGTDLHSKTAATVGISREHAKVFNYG

Xenopus laevis                GCTAFGWMTLQGKKSSGTDLHSKTASTVGISREHAKVFNYG

Drosophila                    GATPLGWMTLSGSKSNGSDMHSITAKAVGISRDHAKVINYA

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 – 1239 DNA polymerase subunit gamma-1
Binding site 943 – 943
Binding site 947 – 947
Binding site 951 – 951
Helix 931 – 939



Literature citations
POLG mutations in sporadic mitochondrial disorders with multiple mtDNA deletions.
Di Fonzo A.; Bordoni A.; Crimi M.; Sara G.; Del Bo R.; Bresolin N.; Comi G.P.;
Hum. Mutat. 22:498-499(2003)
Cited for: VARIANTS PEOB1 ILE-251; ALA-268; ARG-312; THR-467; GLN-562; LEU-587; PRO-807 AND TYR-932; VARIANTS GLY-1143 AND HIS-1236; POLG mutations causing ophthalmoplegia, sensorimotor polyneuropathy, ataxia, and deafness.
Mancuso M.; Filosto M.; Bellan M.; Liguori R.; Montagna P.; Baruzzi A.; DiMauro S.; Carelli V.;
Neurology 62:316-318(2004)
Cited for: VARIANTS SANDO TYR-932 AND ARG-1051;
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.