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| Gene | NRAS |
| Variant | G12A |
| Impact List | missense |
| Protein Effect | loss of function - predicted |
| Gene Variant Descriptions | NRAS G12A is hotspot mutation that lies within a GTP-binding region of the Nras protein (UniProt.org). G12A results in increased Erk1/2 and Stat5 phosphorylation and transformation in culture (PMID: 35211470), and can be predicted to confer a loss of function to the Nras protein based on the effects of HRAS G12A and KRAS G12A, which results in decreased GTPase activity, loss of response to GTPase-activating proteins, and transformation of cultured cells (PMID: 6092966, PMID: 26037647). |
| Associated Drug Resistance | |
| Category Variants Paths |
NRAS mutant NRAS act mut NRAS G12A NRAS mutant NRAS exon2 NRAS G12X NRAS G12A |
| Transcript | NM_002524.5 |
| gDNA | chr1:g.114716126C>G |
| cDNA | c.35G>C |
| Protein | p.G12A |
| Source Database | RefSeq |
| Genome Build | GRCh38/hg38 |
| Transcript | gDNA | cDNA | Protein | Source Database | Genome Build |
|---|---|---|---|---|---|
| NM_002524.5 | chr1:g.114716126C>G | c.35G>C | p.G12A | RefSeq | GRCh38/hg38 |
| NM_002524.4 | chr1:g.114716126C>G | c.35G>C | p.G12A | RefSeq | GRCh38/hg38 |
| NM_002524 | chr1:g.114716126C>G | c.35G>C | p.G12A | RefSeq | GRCh38/hg38 |
| Molecular Profile | Indication/Tumor Type | Response Type | Therapy Name | Approval Status | Evidence Type | Efficacy Evidence | References |
|---|---|---|---|---|---|---|---|
| NRAS G12A | melanoma | predicted - sensitive | Belvarafenib | Case Reports/Case Series | Actionable | In a clinical case study, Belvarafenib (HM95573) treatment resulted in a partial response with a progression-free survival of 4.2 months in a melanoma patient harboring NRAS G12A (PMID: 38470950). | 38470950 |