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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot P25054: Variant p.Arg1348Trp

Adenomatous polyposis coli protein
Gene: APC
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Variant information Variant position: help 1348 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 Arginine (R) to Tryptophan (W) at position 1348 (R1348W, p.Arg1348Trp). 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 large size and basic (R) to large size and aromatic (W) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help -3 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 FAP1. Any additional useful information about the variant.


Sequence information Variant position: help 1348 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 2843 The length of the canonical sequence.
Location on the sequence: help QHPRTKSSRLQGSSLSSESA R HKAVEFSSGAKSPSKSGAQT 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                         QHPRTKSSRLQGSSLS-SESARH-KAVEFSSGAKSPSKSGAQT

Mouse                         QNARAKPSRLQASGLS-SESTRHNKAVEFSSGAKSPSKSGA

Rat                           QSTRTKPSRLQASGLA-SESARH-KAVEFSSGAKSPSKSGA

Xenopus laevis                HHTRTKNNRLQTSNISPSDSSRH-KSVEFSSGAKSPSKSGA
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 2 – 2843 Adenomatous polyposis coli protein
Region 1311 – 1376 Disordered
Compositional bias 1327 – 1350 Polar residues
Modified residue 1360 – 1360 Phosphoserine



Literature citations
Screening for germ-line mutations in familial adenomatous polyposis patients: 61 new patients and a summary of 150 unrelated patients.
Nagase H.; Miyoshi Y.; Horii A.; Aoki T.; Petersen G.M.; Vogelstein B.; Maher E.; Ogawa M.; Maruyama M.; Utsunomiya J.; Baba S.; Nakamura Y.;
Hum. Mutat. 1:467-473(1992)
Cited for: VARIANTS FAP1 MET-1292 AND TRP-1348; VARIANTS ASP-1118; VAL-1304 AND SER-2502;
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.