UniProtKB/Swiss-Prot Q9UIF7: Variant p.Val231Met

Adenine DNA glycosylase
Gene: MUTYH
Chromosomal location: 1p32.1-p34.3
Variant information

Variant position:  231
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 Valine (V) to Methionine (M) at position 231 (V231M, p.Val231Met).
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:  Similar physico-chemical property. Both residues are medium size and hydrophobic.
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  1
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:  Probable disease-associated mutation found in a case of familial colorectal cancer; no significant effect on DNA glycosylase activity; slightly decreased function in DNA repair.
Any additional useful information about the variant.

Other resources:  
Links to websites of interest for the variant.



Sequence information

Variant position:  231
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  546
The length of the canonical sequence.

Location on the sequence:   GVGRYTAGAIASIAFGQATG  V VDGNVARVLCRVRAIGADPS
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                         GVGRYTAGAIASIAFGQATGVVDGNVARVLCRVRAIGADPS

Mouse                         GVGRYTAGAIASIAFDQVTGVVDGNVLRVLCRVRAIGADPT

Rat                           GVGRYTAGAIASIAFDQVTGVVDGNVIRVLCRVRAIGADPT

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 – 546 Adenine DNA glycosylase
Site 233 – 233 Transition state stabilizer
Mutagenesis 233 – 233 D -> N. Loss of DNA glycosylase activity.


Literature citations

Functional complementation assay for 47 MUTYH variants in a MutY-disrupted Escherichia coli strain.
Komine K.; Shimodaira H.; Takao M.; Soeda H.; Zhang X.; Takahashi M.; Ishioka C.;
Hum. Mutat. 36:704-711(2015)
Cited for: CHARACTERIZATION OF VARIANTS FAP2 LEU-18; HIS-125; ARG-128; LEU-154; CYS-176; CYS-179; HIS-179; GLN-182; GLU-186; VAL-220; TRP-238; HIS-242; TRP-271; GLU-283; LEU-292; CYS-306; THR-377; PRO-385; ASP-393; LEU-402; MET-417; CYS-423; ASP-470; THR-470; GLU-477 DEL; THR-486 AND PHE-490; CHARACTERIZATION OF VARIANTS GASC SER-402 AND ARG-411; CHARACTERIZATION OF VARIANTS MET-22; ASP-25; ARG-100; ASN-102; VAL-224; MET-231; CYS-242; PHE-243; TRP-287; HIS-335; ARG-335; GLN-434; PRO-434; GLU-500; PHE-512; LEU-513; MET-526 AND GLN-531; FUNCTION; SUBCELLULAR LOCATION;

Functional evaluation of nine missense-type variants of the human DNA glycosylase enzyme MUTYH in the Japanese population.
Shinmura K.; Kato H.; Goto M.; Yamada H.; Tao H.; Nakamura S.; Sugimura H.;
Hum. Mutat. 37:350-353(2016)
Cited for: CHARACTERIZATION OF VARIANT FAP2 SER-235; CHARACTERIZATION OF VARIANT ASN-102; GLY-121; MET-231; GLY-244; ASN-319; HIS-520 AND ALA-536; FUNCTION;

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.