Home  |  Contact

UniProtKB/Swiss-Prot P25054: Variant p.Ile1307Lys

Adenomatous polyposis coli protein
Gene: APC
Chromosomal location: 5q21-q22
Variant information

Variant position:  1307
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Polymorphism
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 Isoleucine (I) to Lysine (K) at position 1307 (I1307K, p.Ile1307Lys).
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 medium size and hydrophobic (I) to large size and basic (K)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  -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:  In 6% of Ashkenazi Jews; associated with slightly increased risk of colon and breast cancer.
Any additional useful information about the variant.

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



Sequence information

Variant position:  1307
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  2843
The length of the canonical sequence.

Location on the sequence:   IGCNQTTQEADSANTLQIAE  I KEKIGTRSAEDPVSEVPAVS
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                         I-GCNQTTQEADSANTLQIAEIKEKIGTRSAEDPVSEVPAVS

Mouse                         I-GCDQTTQEADSANTLQTAEVKENDVTRSAEDPATEVPAV

Rat                           I-GCDQTTQEADSANTLQIAEIKENDVTRSAQDPASDVPAV

Xenopus laevis                IEGRERNSRGQESNNTLQITEPKE-ISAVSKDGAVNETRSS

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 2 – 2843 Adenomatous polyposis coli protein
Region 960 – 1337 Responsible for down-regulation through a process mediated by direct ubiquitination
Compositional bias 731 – 2832 Ser-rich


Literature citations

The APC I1307K allele and breast cancer risk.
Redston M.; Nathanson K.L.; Yuan Z.Q.; Neuhausen S.L.; Satagopan J.; Wong N.; Yang D.; Nafa D.; Abrahamson J.; Ozcelik H.; Antin-Ozerkis D.; Andrulis I.; Daly M.; Pinsky L.; Schrag D.; Gallinger S.; Kaback M.; King M.-C.; Woodage T.; Brody L.C.; Godwin A.; Warner E.; Weber B.; Foulkes W.; Offit K.;
Nat. Genet. 20:13-14(1998)
Cited for: VARIANT LYS-1307;

The APC variants I1307K and E1317Q are associated with colorectal tumors, but not always with a family history.
Frayling I.M.; Beck N.E.; Ilyas M.; Dove-Edwin I.; Goodman P.; Pack K.; Bell J.A.; Williams C.B.; Hodgson S.V.; Thomas H.J.W.; Talbot I.C.; Bodmer W.F.; Tomlinson I.P.M.;
Proc. Natl. Acad. Sci. U.S.A. 95:10722-10727(1998)
Cited for: VARIANTS LYS-1307 AND GLN-1317;

The APC I1307K allele and cancer risk in a community-based study of Ashkenazi Jews.
Woodage T.; King S.M.; Wacholder S.; Hartge P.; Struewing J.P.; McAdams M.; Laken S.J.; Tucker M.A.; Brody L.C.;
Nat. Genet. 20:62-65(1998)
Cited for: VARIANT LYS-1307;

Inherited colorectal polyposis and cancer risk of the APC I1307K polymorphism.
Gryfe R.; Di Nicola N.; Lal G.; Gallinger S.; Redston M.;
Am. J. Hum. Genet. 64:378-384(1999)
Cited for: VARIANT LYS-1307;

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.