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| Gene | NRAS |
| Variant | G12S |
| Impact List | missense |
| Protein Effect | unknown |
| Gene Variant Descriptions | NRAS G12S is a hotspot mutation that lies within a GTP-binding region of the Nras protein (UniProt.org). G12S results in increased Erk phosphorylation and cell proliferation (PMID: 17823240), increased Stat5 phosphorylation in culture (PMID: 35211470), is transforming in one study (PMID: 17823240), but is not transforming in another study (PMID: 35211470), and therefore, its effect on Nras protein function is unknown. |
| Associated Drug Resistance | |
| Category Variants Paths |
NRAS mutant NRAS exon2 NRAS G12X NRAS G12S |
| Transcript | NM_002524.5 |
| gDNA | chr1:g.114716127C>T |
| cDNA | c.34G>A |
| Protein | p.G12S |
| Source Database | RefSeq |
| Genome Build | GRCh38/hg38 |
| Transcript | gDNA | cDNA | Protein | Source Database | Genome Build |
|---|---|---|---|---|---|
| NM_002524.4 | chr1:g.114716127C>T | c.34G>A | p.G12S | RefSeq | GRCh38/hg38 |
| NM_002524.5 | chr1:g.114716127C>T | c.34G>A | p.G12S | RefSeq | GRCh38/hg38 |
| NM_002524 | chr1:g.114716127C>T | c.34G>A | p.G12S | RefSeq | GRCh38/hg38 |
| Molecular Profile | Indication/Tumor Type | Response Type | Therapy Name | Approval Status | Evidence Type | Efficacy Evidence | References |
|---|---|---|---|---|---|---|---|
| NRAS G12S | melanoma | predicted - sensitive | Tunlametinib | Case Reports/Case Series | Actionable | In a Phase I trial, Tunlametinib (HL-085) treatment demonstrated safety and preliminary efficacy in patients with advanced melanoma harboring NRAS mutations, resulting in a partial response in a patient harboring NRAS G12S who remained on treatment for 36 weeks (PMID: 36600247; NCT03973151). | 36600247 |
| NRAS G12S | melanoma | predicted - sensitive | BGB3245 | Case Reports/Case Series | Actionable | In a Phase I trial, BGB3245 treatment demonstrated manageable safety and resulted in a disease control rate of 48% (16/33,1 complete response, 5 confirmed partial responses (PR), 2 unconfirmed PR, and 8 stable disease > 24 weeks) in patients with advanced solid tumors harboring MAPK pathway alterations, including a partial response in a patient with melanoma harboring NRAS G12S (Cancer Res (2023) 83 (8_Supplement): CT031). | detail... |
| NRAS G12S | acute lymphoblastic leukemia | sensitive | IHMT-RAF-128 | Preclinical - Cell culture | Actionable | In a preclinical study, IHMT-RAF-128 inhibited proliferation in an acute lymphoblastic leukemia cell line harboring NRAS G12S in culture (PMID: 37164118). | 37164118 |