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UniProtKB/Swiss-Prot variant pages

UniProtKB/Swiss-Prot O60674: Variant p.Val617Phe

Tyrosine-protein kinase JAK2
Gene: JAK2
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Variant information Variant position: help 617 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 Valine (V) to Phenylalanine (F) at position 617 (V617F, p.Val617Phe). 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 hydrophobic (V) to large size and aromatic (F) 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 PV, THCYT3 and AML; risk factor for Budd-Chiari syndrome; somatic mutation in a high percentage of patients with essential thrombocythemia or myelofibrosis; leads to constitutive tyrosine phosphorylation activity that promotes cytokine hypersensitivity; no effect on its ability to up-regulate potassium voltage-gated channel activity of KCNA3. Any additional useful information about the variant.
Other resources: help Links to websites of interest for the variant.


Sequence information Variant position: help 617 The position of the amino-acid change on the UniProtKB canonical protein sequence.
Protein sequence length: help 1132 The length of the canonical sequence.
Location on the sequence: help AASMMSKLSHKHLVLNYGVC V CGDENILVQEFVKFGSLDTY 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                         AASMMSKLSHKHLVLNYGVCVCGDENILVQEFVKFGSLDTY

Mouse                         AASMMSQLSHKHLVLNYGVCVCGEENILVQEFVKFGSLDTY

Rat                           AASMMSQLSHKHLVLNYGVCVCGEENILVQEFVKFGSLDTY

Pig                           AASMMSQLSHKHLVLNYGVCVCGEENILVQEFVKFGSLDTY

Chicken                       AASMMSQLSYKHLVLNYGVCVCGEENILVQEYVKFGSLDTY
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 – 1132 Tyrosine-protein kinase JAK2
Domain 545 – 809 Protein kinase 1



Literature citations
Acquired mutation of the tyrosine kinase JAK2 in human myeloproliferative disorders.
Baxter E.J.; Scott L.M.; Campbell P.J.; East C.; Fourouclas N.; Swanton S.; Vassiliou G.S.; Bench A.J.; Boyd E.M.; Curtin N.; Scott M.A.; Erber W.N.; Green A.R.;
Lancet 365:1054-1061(2005)
Cited for: VARIANT PV PHE-617; Definition of subtypes of essential thrombocythaemia and relation to polycythaemia vera based on JAK2 V617F mutation status: a prospective study.
Campbell P.J.; Scott L.M.; Buck G.; Wheatley K.; East C.L.; Marsden J.T.; Duffy A.; Boyd E.M.; Bench A.J.; Scott M.A.; Vassiliou G.S.; Milligan D.W.; Smith S.R.; Erber W.N.; Bareford D.; Wilkins B.S.; Reilly J.T.; Harrison C.N.; Green A.R.;
Lancet 366:1945-1953(2005)
Cited for: VARIANT THCYT3 PHE-617; A unique clonal JAK2 mutation leading to constitutive signalling causes polycythaemia vera.
James C.; Ugo V.; Le Couedic J.-P.; Staerk J.; Delhommeau F.; Lacout C.; Garcon L.; Raslova H.; Berger R.; Bennaceur-Griscelli A.; Villeval J.L.; Constantinescu S.N.; Casadevall N.; Vainchenker W.;
Nature 434:1144-1148(2005)
Cited for: VARIANT PV PHE-617; CHARACTERIZATION OF VARIANT PV PHE-617; A gain-of-function mutation of JAK2 in myeloproliferative disorders.
Kralovics R.; Passamonti F.; Buser A.S.; Teo S.-S.; Tiedt R.; Passweg J.R.; Tichelli A.; Cazzola M.; Skoda R.C.;
N. Engl. J. Med. 352:1779-1790(2005)
Cited for: VARIANT PV PHE-617; Case records of the Massachusetts General Hospital. Case 15-2006: a 46-year-old woman with sudden onset of abdominal distention.
Chung R.T.; Iafrate A.J.; Amrein P.C.; Sahani D.V.; Misdraji J.;
N. Engl. J. Med. 354:2166-2175(2006)
Cited for: ASSOCIATION OF VARIANT PHE-617 WITH SUSCEPTIBILITY BUDD-CHIARI SYNDROME; The JAK2 V617F mutation in de novo acute myelogenous leukemias.
Lee J.W.; Kim Y.G.; Soung Y.H.; Han K.J.; Kim S.Y.; Rhim H.S.; Min W.S.; Nam S.W.; Park W.S.; Lee J.Y.; Yoo N.J.; Lee S.H.;
Oncogene 25:1434-1436(2006)
Cited for: VARIANTS AML ASN-607 AND PHE-617; The JAK2 V617F mutation occurs in hematopoietic stem cells in polycythemia vera and predisposes toward erythroid differentiation.
Jamieson C.H.M.; Gotlib J.; Durocher J.A.; Chao M.P.; Mariappan M.R.; Lay M.; Jones C.; Zehnder J.L.; Lilleberg S.L.; Weissman I.L.;
Proc. Natl. Acad. Sci. U.S.A. 103:6224-6229(2006)
Cited for: VARIANT PV PHE-617; Up-regulation of Kv1.3 channels by janus kinase 2.
Hosseinzadeh Z.; Warsi J.; Elvira B.; Almilaji A.; Shumilina E.; Lang F.;
J. Membr. Biol. 248:309-317(2015)
Cited for: CHARACTERIZATION OF VARIANT PV PHE-617; FUNCTION; MUTAGENESIS OF LYS-882;
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.