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Gene IDH2
Variant A347T
Impact List missense
Protein Effect no effect - predicted
Gene Variant Descriptions IDH2 A347T does not lie within any known functional domains of the Idh2 protein (UniProt.org). A347T confers resistance to an IDH2 inhibitor in the presence of IDH2 R140Q, but does not lead to increased production of the oncometabolite 2HG (R(-)-2-hydroxyglutarate) in cell culture (PMID: 36222845), and therefore, is predicted to have no effect on Idh2 protein function.
Associated Drug Resistance Y
Category Variants Paths

IDH2 mutant IDH2 A347T

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Transcript NM_002168.4
gDNA chr15:g.90085316C>T
cDNA c.1039G>A
Protein p.A347T
Source Database RefSeq
Genome Build GRCh38/hg38
Transcript gDNA cDNA Protein Source Database Genome Build
NM_002168.4 chr15:g.90085316C>T c.1039G>A p.A347T RefSeq GRCh38/hg38
NM_002168.3 chr15:g.90085316C>T c.1039G>A p.A347T RefSeq GRCh38/hg38

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Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
IDH2 mutant angioimmunoblastic T-cell lymphoma not applicable N/A Guideline Diagnostic IDH2 mutations aid in the diagnosis of angioimmunoblastic T-cell lymphoma (NCCN.org). detail...
IDH2 mutant acute myeloid leukemia sensitive Decitabine Guideline Actionable Dacogen (decitabine) is included in guidelines for adult patients with acute myeloid leukemia harboring an IDH2 mutation (NCCN.org). detail...
IDH2 mutant myelofibrosis not applicable N/A Guideline Prognostic IDH2 mutations are associated with inferior leukemia-free survival in patients with myelofibrosis (NCCN.org). detail...
IDH2 mutant myelofibrosis not applicable N/A Guideline Diagnostic IDH2 mutations aid in the diagnosis of primary myelofibrosis in the absence of JAK2, CALR, or MPL mutations (NCCN.org). detail...
IDH2 mutant malignant astrocytoma not applicable N/A Guideline Diagnostic IDH2 mutations aid in the diagnosis of grade II and grade III astrocytomas (NCCN.org). detail...
IDH2 mutant acute myeloid leukemia predicted - sensitive Talazoparib Preclinical - Patient cell culture Actionable In a preclinical study, cells from a patient with acute myeloid leukemia harboring an IDH2 mutation were sensitive to treatment with Talzenna (talazoparib) in culture, demonstrating decreased colony formation (PMID: 29339439). 29339439
IDH2 mutant polycythemia vera not applicable N/A Guideline Prognostic IDH2 mutations are associated with inferior overall survival and leukemia-free survival in patients with polycythemia vera (NCCN.org). detail...
IDH2 mutant acute myeloid leukemia predicted - sensitive Venetoclax Phase II Actionable In a Phase II trial, 33% (4/12) of acute myeloid leukemia patients harboring either IDH1 or IDH2 mutations responded to treatment with Venclexta (venetoclax), demonstrating a complete response or complete response with incomplete blood count recovery (PMID: 27520294). 27520294
IDH2 mutant acute myeloid leukemia sensitive Decitabine + Venetoclax Guideline Actionable Venclexta (venetoclax) in combination with Dacogen (decitabine) is included in guidelines for adult patients with acute myeloid leukemia harboring an IDH2 mutation (NCCN.org). detail...
IDH2 mutant oligodendroglioma not applicable N/A Guideline Diagnostic IDH2 mutations aid in the diagnosis of oligodendrogliomas (NCCN.org). detail...
IDH2 mutant acute myeloid leukemia sensitive Azacitidine + Enasidenib Guideline Actionable Idhifa (enasidenib) in combination with Vidaza (azacitidine) is included in guidelines (category 2B) for patients with acute myeloid leukemia harboring an IDH2 mutation (NCCN.org). detail...
IDH2 mutant acute myeloid leukemia sensitive Azacitidine Guideline Actionable Vidaza (azacitidine) is included in guidelines for adult patients with acute myeloid leukemia harboring an IDH2 mutation (NCCN.org). detail...
IDH2 mutant acute myeloid leukemia predicted - sensitive Olaparib Preclinical - Patient cell culture Actionable In a preclinical study, cells from a patient with acute myeloid leukemia harboring an IDH2 mutation were sensitive to treatment with Lynparza (olaparib) in culture, demonstrating decreased colony formation (PMID: 29339439). 29339439
IDH2 mutant anaplastic astrocytoma not applicable N/A Guideline Diagnostic IDH2 mutations aid in the diagnosis of grade III astrocytomas (NCCN.org). detail...
IDH2 mutant acute myeloid leukemia sensitive Cytarabine + Venetoclax Phase Ib/II Actionable In a Phase I/II trial, Venclexta (venetoclax) in combination with low-dose cytarabine resulted in complete remission or complete remission with incomplete count recovery in 72% (13/18) of patients with acute myeloid leukemia harboring IDH1 or IDH2 mutations who were ineligible for intensive chemotherapy (ASH Annual Meeting, Dec 2018, Abstract 284; NCT02287233). detail...
IDH2 mutant acute myeloid leukemia sensitive Cytarabine + Venetoclax Guideline Actionable Venclexta (venetoclax) in combination with Cytosar-U (cytarabine) is included in guidelines for adult patients with acute myeloid leukemia harboring an IDH2 mutation (NCCN.org). detail...
IDH2 mutant acute myeloid leukemia predicted - sensitive Daunorubicin + Olaparib Preclinical - Patient cell culture Actionable In a preclinical study, the combination therapy of Lynparza (olaparib) and Cerubidine (daunoruibicin) resulted in an additive effect in cells from a patient with acute myeloid leukemia harboring an IDH2 mutation, demonstrating decreased colony formation in culture (PMID: 29339439). 29339439
IDH2 mutant hematologic cancer sensitive Enasidenib Phase I Actionable In a Phase I study, Enasidenib (AG-221) demonstrated safety and efficacy in patients with hematological cancer harboring IDH2 mutations and included 8 CR, 1 CRp, 3 CRi, and 8 PR (ASH Meeting, Dec 2014, abstract #115). detail...
IDH2 mutant high grade glioma not applicable N/A Guideline Prognostic IDH2 mutations are associated with a favorable prognosis in patients with glioma, and are associated with a survival benefit for patients treated with radiation or alkylator therapy (NCCN.org). detail...
IDH2 mutant high grade glioma not applicable N/A Guideline Diagnostic IDH2 mutations aid in the diagnosis of gliomas (NCCN.org). detail...
IDH2 mutant acute myeloid leukemia sensitive Enasidenib FDA approved - Has Companion Diagnostic Actionable In a Phase I/II trial that supported FDA approval, Idhifa (enasidenib) treatment resulted in an overall response rate of 40.3% (71/176) with a median response duration of 5.8 months, complete remission in 19.3% (34/176), and stable disease in 48.3% (85/176) of acute myeloid leukemia patients harboring IDH2 mutations (R140Q/L/G/W, R172K/M/G/S/W) (PMID: 28588020; NCT01915498). 28588020 detail... detail...
IDH2 mutant acute myeloid leukemia sensitive Enasidenib Guideline Actionable Idhifa (enasidenib) is included in guidelines for patients with relapsed or refractory acute myeloid leukemia harboring an IDH2 mutation (NCCN.org). detail...
IDH2 mutant low grade glioma predicted - sensitive Vorasidenib Case Reports/Case Series Actionable In a Phase I trial, Voranigo (vorasidenib) treatment resulted in an objective response in 13.6% (3/22, 1 partial response, 2 minor response) and stable disease in 72.7% (16/22) of patients with non-enhancing low-grade glioma harboring mutations in IDH1 (n=20) or IDH2 (n=1), with a median progression-free survival of 36.8 months, and resulted in stable disease as best response in 56.7% (17/30) of patients with enhancing tumors harboring mutations in IDH1 (n=28) or IDH2 (n=2) (PMID: 34078652; NCT02481154). 34078652
IDH2 mutant acute myeloid leukemia sensitive Azacitidine + Venetoclax Guideline Actionable Venclexta (venetoclax) in combination with Vidaza (azacitidine) is included in guidelines for adult patients with acute myeloid leukemia harboring an IDH2 mutation (NCCN.org). detail...
IDH2 mutant acute myeloid leukemia predicted - sensitive Daunorubicin + Talazoparib Preclinical - Patient cell culture Actionable In a preclinical study, the combination therapy of Talzenna (talazoparib) and Cerubidine (daunoruibicin) resulted in an additive effect in cells from a patient with acute myeloid leukemia harboring an IDH2 mutation, demonstrating decreased colony formation in culture (PMID: 29339439). 29339439
IDH2 mutant essential thrombocythemia not applicable N/A Guideline Prognostic The presence of at least one mutation in either SH2B3, IDH2, U2AF1, SRSF2, SF3B1, EZH2, TP53, or RUNX1 is associated with inferior overall survival in patients with essential thrombocythemia (NCCN.org). detail...