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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot Q15831: Variant p.Phe231Leu

Serine/threonine-protein kinase STK11
Gene: STK11
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Variant information Variant position: help 231 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 Phenylalanine (F) to Leucine (L) at position 231 (F231L, p.Phe231Leu). 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 aromatic (F) to medium size and hydrophobic (L) The physico-chemical property of the reference and variant residues and the change implicated.
BLOSUM score: help 0 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 cervical cancer; somatic mutation. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 231 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 433 The length of the canonical sequence.
Location on the sequence: help RTSQGSPAFQPPEIANGLDT F SGFKVDIWSAGVTLYNITTG 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                         RTSQGSPAFQPPEIANGLDTFSGFKVDIWSAGVTLYNITTG

Mouse                         RTSQGSPAFQPPEIANGLDTFSGFKVDIWSAGVTLYNITTG

Rat                           RTSQGSPAFQPPEIANGLDTFSGFKVDIWSAGVTLYNITTG

Chicken                       RTSQGSPAFQPPEIANGLDTFSGFKVDIWSAGVTLYNITTG

Xenopus laevis                RTSQGSPAFQPPEIANGLDTFSGFKVDIWSAGVTLYNITTG

Slime mold                    SRSYGSPAFQPPELTQFQTTFSPFKIDIWAMGVTLYLMTIG

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 – 430 Serine/threonine-protein kinase STK11
Domain 49 – 309 Protein kinase
Beta strand 231 – 233



Literature citations
Mutations in the STK11 gene characterize minimal deviation adenocarcinoma of the uterine cervix.
Kuragaki C.; Enomoto T.; Ueno Y.; Sun H.; Fujita M.; Nakashima R.; Ueda Y.; Wada H.; Murata Y.; Toki T.; Konishi I.; Fujii S.;
Lab. Invest. 83:35-45(2003)
Cited for: VARIANTS CERVICAL CANCER LYS-14; PRO-160 AND LEU-231; VARIANT CERVICAL CARCINOMA MET-66;
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.