Gene Variant Detail

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Gene BRAF
Variant L597R
Impact List missense
Protein Effect gain of function
Gene Variant Descriptions BRAF L597R lies within the protein kinase domain of the Braf protein (UniProt.org). L597R results in activation of Braf as indicated by increased phosphorylation of Mek and Erk in cell culture (PMID: 22798288, PMID: 26343582), is associated with Erk activation in a patient tumor sample (PMID: 23715574), and in one of two cell lines, increased cell proliferation and cell viability compared to wild-type Braf (PMID: 29533785).
Associated Drug Resistance
Category Variants Paths

BRAF mutant BRAF act mut BRAF L597R

BRAF mutant BRAF L597X BRAF L597R

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Transcript NM_004333.6
gDNA chr7:g.140753345A>C
cDNA c.1790T>G
Protein p.L597R
Source Database RefSeq
Genome Build GRCh38/hg38
Transcript gDNA cDNA Protein Source Database Genome Build
NM_001378474.1 chr7:g.140753345A>C c.1790T>G p.L597R RefSeq GRCh38/hg38
NM_004333.6 chr7:g.140753345A>C c.1790T>G p.L597R RefSeq GRCh38/hg38
NM_001378468.1 chr7:g.140753345A>C c.1790T>G p.L597R RefSeq GRCh38/hg38
XM_005250045 chr7:g.140753345A>C c.1790T>G p.L597R RefSeq GRCh38/hg38
NM_001378472.1 chr7:g.140749333_140749334delTTinsAG c.1789_1790delTTinsAG p.L597R RefSeq GRCh38/hg38
NM_004333.5 chr7:g.140753345A>C c.1790T>G p.L597R RefSeq GRCh38/hg38
NM_004333 chr7:g.140753345A>C c.1790T>G p.L597R RefSeq GRCh38/hg38
NM_001378473.1 chr7:g.140749333_140749334delTTinsAG c.1789_1790delTTinsAG p.L597R RefSeq GRCh38/hg38
NM_001354609.1 chr7:g.140753345A>C c.1790T>G p.L597R RefSeq GRCh38/hg38
NM_001354609.2 chr7:g.140753345A>C c.1790T>G p.L597R RefSeq GRCh38/hg38

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Molecular Profile Indication/Tumor Type Response Type Therapy Name Approval Status Evidence Type Efficacy Evidence References
BRAF L597R Advanced Solid Tumor sensitive Trametinib Preclinical Actionable Preclinical studies demonstrated the MEK inhibitor, Mekinist (trametinib) caused decreased activation of MEK and ERK in cells expressing BRAF L597R (PMID: 22798288). 22798288
BRAF L597R melanoma predicted - sensitive Dabrafenib Preclinical - Patient cell culture Actionable In a preclinical study, Tafinlar (dabrafenib) treatment inhibited Erk activation and reduced viability of patient-derived melanoma cells harboring BRAF L597R in culture (PMID: 23715574). 23715574
BRAF L597R melanoma predicted - sensitive Vemurafenib Case Reports/Case Series Actionable In a clinical case study, Zelboraf (vemurafenib) treatment inhibited growth of skin and lung nodules by 30% and resulted in a duration of response of over 4 months in a melanoma patient harboring BRAF L597R, and inhibited Erk activation and reduced viability of melanoma cells derived from the patient in culture (PMID: 23715574). 23715574
BRAF L597R Advanced Solid Tumor sensitive Vemurafenib Preclinical Actionable In a preclinical study, treatment of cells expressing BRAF L597R with the BRAF inhibitor, Zelboraf (vemurafenib), decreased activation of MEK and ERK (PMID: 22798288). 22798288
BRAF L597R melanoma predicted - sensitive Sorafenib Preclinical - Patient cell culture Actionable In a preclinical study, Nexavar (sorafenib) treatment inhibited viability of patient-derived melanoma cells harboring BRAF L597R in culture (PMID: 23715574). 23715574
BRAF L597R prostate cancer sensitive PLX8394 Preclinical - Cell culture Actionable In a preclinical study, PLX8394 treatment inhibited Erk signaling and reduced proliferation of prostate cancer cells harboring BRAF L597R in culture (PMID: 30559419). 30559419
BRAF L597R lung adenocarcinoma predicted - sensitive Dabrafenib + Trametinib Case Reports/Case Series Actionable In a clinical case study, a patient with lung adenocarcinoma harboring BRAF L597R demonstrated clinical improvement and a tumor response at 13 weeks with resolution of hepatic metastasis and mediastinal lymphadenopathy when treated with the combination of Tafinlar (dabrafenib) and Mekinist (trametinib), and at the 12 month follow up remained on treatment, showing no disease progression (PMID: 32540409). 32540409
BRAF L597R colorectal cancer not predictive Fluorouracil + Irinotecan + Leucovorin + Panitumumab Case Reports/Case Series Actionable In a clinical study, the combination of Vectibix (panitumumab) with FOLFIRI as a second-line therapy resulted in stable disease with a PFS of 16.5 months in a patient with metastatic colorectal cancer harboring BRAF L597R (PMID: 31515458). 31515458
BRAF L597R prostate cancer predicted - sensitive PF-07799933 Preclinical - Biochemical Actionable In a preclinical study, PF-07799933 inhibited Erk phosphorylation in prostate cancer cells harboring BRAF L597R in culture (PMID: 38691346). 38691346