UniProtKB/Swiss-Prot P12931: Variant p.Glu527Lys

Proto-oncogene tyrosine-protein kinase Src
Gene: SRC
Chromosomal location: 20q11.2
Variant information

Variant position:  527
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Type of variant:  Disease [Disclaimer]
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 Glutamate (E) to Lysine (K) at position 527 (E527K, p.Glu527Lys).
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 acidic (E) to large size and basic (K)
The physico-chemical property of the reference and variant residues and the change implicated.

BLOSUM score:  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

Involvement in disease:  Thrombocytopenia 6 (THC6) [MIM:616937]: A form of thrombocytopenia, a hematologic disorder defined by a decrease in the number of platelets in circulating blood, resulting in the potential for increased bleeding and decreased ability for clotting. THC6 is an autosomal dominant form. Affected individuals may also have bone abnormalities and an increased risk for myelofibrosis. {ECO:0000269|PubMed:26936507}. Note=The disease is caused by mutations affecting the gene represented in this entry.
The name and a short description of the disease associated with the variant. For more information about the disease, the user can refer to OMIM, following the link provided after the disease acronym.

Variant description:  In THC6; increased protein tyrosine kinase activity; increased autophosphorylation at Y-419; causes defective megakaryopoiesis associated with increased overall tyrosine phosphorylation in megakaryocytes.
Any additional useful information about the variant.

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



Sequence information

Variant position:  527
The position of the amino-acid change on the UniProtKB canonical protein sequence.

Protein sequence length:  536
The length of the canonical sequence.

Location on the sequence:   EERPTFEYLQAFLEDYFTST  E PQYQPGENL
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                         EERPTFEYLQAFLEDYFTSTEPQYQPGENL

Mouse                         EERPTFEYLQAFLEDYFTSTEPQYQPGENL

Rat                           EERPTFEYLQAFLEDYFTSTEPQYQPGENL

Chicken                       EERPTFEYLQAFLEDYFTSTEPQYQPGENL

Zebrafish                     EERPTFEYLQGFLEDYFTSTEPQYQPGENL

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 – 536 Proto-oncogene tyrosine-protein kinase Src
Modified residue 511 – 511 Phosphothreonine
Modified residue 522 – 522 Phosphotyrosine
Modified residue 530 – 530 Phosphotyrosine; by CSK


Literature citations

A dominant gain-of-function mutation in universal tyrosine kinase SRC causes thrombocytopenia, myelofibrosis, bleeding, and bone pathologies.
Turro E.; Greene D.; Wijgaerts A.; Thys C.; Lentaigne C.; Bariana T.K.; Westbury S.K.; Kelly A.M.; Selleslag D.; Stephens J.C.; Papadia S.; Simeoni I.; Penkett C.J.; Ashford S.; Attwood A.; Austin S.; Bakchoul T.; Collins P.; Deevi S.V.; Favier R.; Kostadima M.; Lambert M.P.; Mathias M.; Millar C.M.; Peerlinck K.; Perry D.J.; Schulman S.; Whitehorn D.; Wittevrongel C.; De Maeyer M.; Rendon A.; Gomez K.; Erber W.N.; Mumford A.D.; Nurden P.; Stirrups K.; Bradley J.R.; Raymond F.L.; Laffan M.A.; Van Geet C.; Richardson S.; Freson K.; Ouwehand W.H.;
Sci. Transl. Med. 8:328RA30-328RA30(2016)
Cited for: PHOSPHORYLATION AT TYR-419 AND TYR-530; INVOLVEMENT IN THC6; VARIANT THC6 LYS-527; CHARACTERIZATION OF VARIANT THC6 LYS-527;

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.