Molecular Profile Detail


Missing content? – Request curation!

Request curation for specific Genes, Variants, or PubMed publications.

Have questions, comments, or suggestions? - Let us know!

Email us at :

Profile Name FBXW7 R505C
Gene Variant Detail

FBXW7 R505C (loss of function)

Relevant Treatment Approaches mTORC1 Inhibitor


  • Case insensitive filtering will display rows if any text in any cell matches the filter term
  • Use simple literal full or partial string matches
  • Separate multiple filter terms with a space. Any order may be used (i. e. a b c and c b a are equivalent )
  • Filtering will only apply to rows that are already loaded on the page. Filtering has no impact on query parameters.
  • Use quotes to match on a longer phrase with spaces (i.e. "mtor c1483f")


  • Generally, the default sort order for tables is set to be first column ascending; however, specific tables may set a different default sort order.
  • Click on any column header arrows to sort by that column
  • Hold down the Shift key and click multiple columns to sort by more than one column. Be sure to set ascending or descending order for a given column before moving on to the next column.

Molecular Profile Indication/Tumor Type Response Type Relevant Treatment Approaches Therapy Name Approval Status Evidence Type Efficacy Evidence References
FBXW7 R505C T-cell adult acute lymphocytic leukemia resistant MRK-003 Preclinical Actionable In a preclinical study, FBXW7 R505C conferred resistance to gamma secretase inhibitor, MRK-003, by activation of the NOTCH pathway and stablization of MYC as demonstrated in T cell acute lymphoblastic leukemia (T-ALL) cell lines (PMID: 17646409). 17646409
FBXW7 R505C head and neck squamous cell carcinoma sensitive Vorinostat Preclinical Actionable In a preclinical study, Zolinza (vorinostat) inhibited growth of a head and neck squamous cell carcinoma cell line harboring FBXW7 R505C in culture (PMID: 23274910). 23274910
FBXW7 R505C colorectal cancer resistant Regorafenib Preclinical - Cell culture Actionable In a preclinical study, colorectal cell lines with FBXW7 R505C demonstrated acquired resistance in regorafenib (PMID: 27399335). 27399335
FBXW7 R505C melanoma predicted - resistant unspecified PD-1 antibody Preclinical Actionable In a preclinical study, a melanoma cell line expressing FBXW7 R505C in a mouse model conferred resistance to treatment with an unspecified PD-1 antibody, demonstrating increased tumor volume and decreased survival compared to models with wild-type FBXW7 (PMID: 32371478). 32371478
FBXW7 R505C melanoma predicted - resistant Pembrolizumab Case Reports/Case Series Actionable In a clinical case study, a melanoma patient treated with Keytruda (pembrolizumab) demonstrated a response in all lesions except one, which was found to harbor FBXW7 R505C (PMID: 32371478). 32371478