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| Gene | RET |
| Variant | C609W |
| Impact List | missense |
| Protein Effect | unknown |
| Gene Variant Descriptions | RET C609W lies within the extracellular domain of the Ret protein (UniProt.org). The functional effect of C609W is conflicting as it reduces cell surface Ret expression, results in a loss of response to GDNF-regulated apoptosis, but also induces Ret dimerization, leads to increased phosphorylation of Shc, and transformation of cultured cells (PMID: 9502784, PMID: 10921886), and therefore, its effect on Ret protein function is unknown. |
| Associated Drug Resistance | |
| Category Variants Paths |
RET mutant RET C609X RET C609W |
| Transcript | NM_020975.6 |
| gDNA | chr10:g.43113623C>G |
| cDNA | c.1827C>G |
| Protein | p.C609W |
| Source Database | RefSeq |
| Genome Build | GRCh38/hg38 |
| Transcript | gDNA | cDNA | Protein | Source Database | Genome Build |
|---|---|---|---|---|---|
| NM_020975.5 | chr10:g.43113623C>G | c.1827C>G | p.C609W | RefSeq | GRCh38/hg38 |
| NM_001406743.1 | chr10:g.43113623C>G | c.1827C>G | p.C609W | RefSeq | GRCh38/hg38 |
| NM_020630.5 | chr10:g.43113623C>G | c.1827C>G | p.C609W | RefSeq | GRCh38/hg38 |
| NM_001406765.1 | chr10:g.43113623C>G | c.1827C>G | p.C609W | RefSeq | GRCh38/hg38 |
| NM_001406763.1 | chr10:g.43113623C>G | c.1827C>G | p.C609W | RefSeq | GRCh38/hg38 |
| NM_001406759.1 | chr10:g.43113623C>G | c.1827C>G | p.C609W | RefSeq | GRCh38/hg38 |
| NM_020975 | chr10:g.43113623C>G | c.1827C>G | p.C609W | RefSeq | GRCh38/hg38 |
| NM_020975.6 | chr10:g.43113623C>G | c.1827C>G | p.C609W | RefSeq | GRCh38/hg38 |
| NM_020630.7 | chr10:g.43113623C>G | c.1827C>G | p.C609W | RefSeq | GRCh38/hg38 |
| NM_020630 | chr10:g.43113623C>G | c.1827C>G | p.C609W | RefSeq | GRCh38/hg38 |
| NM_001406744.1 | chr10:g.43113623C>G | c.1827C>G | p.C609W | RefSeq | GRCh38/hg38 |
| NM_001406760.1 | chr10:g.43113623C>G | c.1827C>G | p.C609W | RefSeq | GRCh38/hg38 |
| Molecular Profile | Indication/Tumor Type | Response Type | Therapy Name | Approval Status | Evidence Type | Efficacy Evidence | References |
|---|---|---|---|---|---|---|---|
| RET C609W | medullary thyroid carcinoma | sensitive | Selpercatinib | FDA approved - On Companion Diagnostic | Actionable | In a Phase I/II trial (LIBRETTO-001) that supported FDA approval, Retevmo (selpercatinib) treatment resulted in an objective response rate (ORR) of 69% (38/55, 5 complete and 33 partial responses) in previously treated adult and pediatric patients of 12 years and older with medullary thyroid cancer harboring RET mutations as detected by an approved test, including RET C609W; ORR was 73% (64/88) in treatment naive patients (PMID: 32846061; NCT03157128). | 32846061 detail... detail... |