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Gene JAK2
Variant V617I
Impact List missense
Protein Effect gain of function
Gene Variant Descriptions JAK2 V617I lies within the protein kinase domain 1 of the Jak2 protein (UniProt.org). V617I results in increased kinase activity through Jak2 autophosphorylation (PMID: 19638629) and increased proliferation of myeloid progenitors and increased ligand-dependent phosphorylation of Stat5 in a mouse model (PMID: 26458983).
Associated Drug Resistance
Category Variants Paths

JAK2 mutant JAK2 act mut JAK2 V617I

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Transcript NM_004972.4
gDNA chr9:g.5073770G>A
cDNA c.1849G>A
Protein p.V617I
Source Database RefSeq
Genome Build GRCh38/hg38
Transcript gDNA cDNA Protein Source Database Genome Build
NM_004972 chr9:g.5073770G>A c.1849G>A p.V617I RefSeq GRCh38/hg38
NM_001322196 chr9:g.5073770G>A c.1849G>A p.V617I RefSeq GRCh38/hg38
NM_001322194 chr9:g.5073770G>A c.1849G>A p.V617I RefSeq GRCh38/hg38
NM_004972.3 chr9:g.5073770G>A c.1849G>A p.V617I RefSeq GRCh38/hg38
NM_001322196.2 chr9:g.5073770G>A c.1849G>A p.V617I RefSeq GRCh38/hg38
NM_001322194.1 chr9:g.5073770G>A c.1849G>A p.V617I RefSeq GRCh38/hg38
NM_001322194.2 chr9:g.5073770G>A c.1849G>A p.V617I RefSeq GRCh38/hg38
NM_001322195.2 chr9:g.5073770G>A c.1849G>A p.V617I RefSeq GRCh38/hg38
NM_001322195 chr9:g.5073770G>A c.1849G>A p.V617I RefSeq GRCh38/hg38
NM_001322195.1 chr9:g.5073770G>A c.1849G>A p.V617I RefSeq GRCh38/hg38
NM_004972.4 chr9:g.5073770G>A c.1849G>A p.V617I RefSeq GRCh38/hg38
NM_001322196.1 chr9:g.5073770G>A c.1849G>A p.V617I RefSeq GRCh38/hg38

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Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
JAK2 mutant essential thrombocythemia not applicable N/A Guideline Diagnostic JAK2 mutations aid in the diagnosis of essential thrombocythemia (NCCN.org). detail...
JAK2 mutant childhood B-cell acute lymphoblastic leukemia not applicable N/A Guideline Prognostic JAK2 mutations are associated with a poor prognosis in pediatric patients with B-cell acute lymphoblastic leukemia (NCCN.org). detail...
JAK2 mutant myelofibrosis not applicable N/A Guideline Diagnostic JAK2 mutations aid in the diagnosis of primary myelofibrosis (NCCN.org). detail...
JAK2 mutant B-cell acute lymphoblastic leukemia not applicable N/A Guideline Prognostic JAK2 mutations are associated with a poor prognosis in patients with B-cell acute lymphoblastic leukemia (NCCN.org). detail...