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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q9UIF7: Variant p.Asn235Ser

Adenine DNA glycosylase
Gene: MUTYH
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Variant information Variant position: help 235 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 Asparagine (N) to Serine (S) at position 235 (N235S, p.Asn235Ser). 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 (N) to small size and polar (S) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help 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: help In FAP2; loss of DNA glycosylase activity; loss of function in DNA repair. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 235 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 546 The length of the canonical sequence.
Location on the sequence: help YTAGAIASIAFGQATGVVDG N VARVLCRVRAIGADPSSTLV 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                         YTAGAIASIAFGQATGVVDGNVARVLCRVRAIGADPSSTLV

Mouse                         YTAGAIASIAFDQVTGVVDGNVLRVLCRVRAIGADPTSTLV

Rat                           YTAGAIASIAFDQVTGVVDGNVIRVLCRVRAIGADPTSSFV
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 – 546 Adenine DNA glycosylase
Site 233 – 233 Transition state stabilizer
Mutagenesis 233 – 233 D -> N. Loss of DNA glycosylase activity.
Helix 234 – 243



Literature citations
Inherited predisposition to colorectal adenomas caused by multiple rare alleles of MUTYH but not OGG1, NUDT1, NTH1 or NEIL 1, 2 or 3.
Dallosso A.R.; Dolwani S.; Jones N.; Jones S.; Colley J.; Maynard J.; Idziaszczyk S.; Humphreys V.; Arnold J.; Donaldson A.; Eccles D.; Ellis A.; Evans D.G.; Frayling I.M.; Hes F.J.; Houlston R.S.; Maher E.R.; Nielsen M.; Parry S.; Tyler E.; Moskvina V.; Cheadle J.P.; Sampson J.R.;
Gut 57:1252-1255(2008)
Cited for: VARIANTS FAP2 GLU-213; SER-235 AND MET-474; 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 VARIANTS ASN-102; MET-231; GLY-244; ASN-319; HIS-520 AND ALA-536; FUNCTION; MUTAGENESIS OF ASP-121;
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.