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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot O96017: Variant p.Thr59Lys

Serine/threonine-protein kinase Chk2
Gene: CHEK2
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Variant information Variant position: help 59 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Type of variant: help US 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 Threonine (T) to Lysine (K) at position 59 (T59K, p.Thr59Lys). 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 (T) to large size and basic (K) 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 multiple cancers. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 59 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 543 The length of the canonical sequence.
Location on the sequence: help SSSSTSTMPNSSQSSHSSSG T LSSLETVSTQELYSIPEDQE 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                         SSSSTSTMPNSSQSSHSSSGTLSSLETVSTQELYSIPEDQE

Mouse                         SSSSTGTVPSSSQSSHSSSGTLSSLETVSTQELCSI-----

Caenorhabditis elegans        AEKPIVVVPVTRD------------DTMPVDEDLVV-----

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 – 543 Serine/threonine-protein kinase Chk2
Region 1 – 66 Disordered
Compositional bias 7 – 66 Polar residues
Modified residue 62 – 62 Phosphoserine; by PLK3
Modified residue 68 – 68 Phosphothreonine; by ATM and MAP3K20
Modified residue 73 – 73 Phosphoserine; by PLK3
Alternative sequence 1 – 221 Missing. In isoform 13.
Mutagenesis 68 – 68 T -> A. Loss of activation and phosphorylation.
Mutagenesis 73 – 73 S -> A. Impaired activation, phosphorylation by ATM and G2/M transition checkpoint.



Literature citations
Mutation analysis of the CHK2 gene in breast carcinoma and other cancers.
Ingvarsson S.; Sigbjornsdottir B.I.; Huiping C.; Hafsteinsdottir S.H.; Ragnarsson G.; Barkardottir R.B.; Arason A.; Egilsson V.; Bergthorsson J.T.;
Breast Cancer Res. 4:R4-R4(2002)
Cited for: VARIANT MULTIPLE CANCERS LYS-59;
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.