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Gene Symbol FGFR2
Synonyms BBDS | BEK | BFR-1 | CD332 | CEK3 | CFD1 | ECT1 | JWS | K-SAM | KGFR | TK14 | TK25
Gene Description FGFR2, fibroblast growth factor receptor 2, is a receptor tyrosine kinase activated upon binding of the FGF ligand, which activates RAS-MAPK and PI3K-AKT pathways (PMID: 22508544). Altered function of FGFR2 through activating mutations, fusions, and amplification increases cell proliferation and tumorigenesis (PMID: 22508544) and is observed in prostate (PMID: 30761180), breast, lung, uterine, and ovarian cancers (PMID: 29104507), while FGFR2 amplification (PMID: 31076567) and overexpression (PMID: 30662521) is commonly observed in gastric cancer.
NCBI Gene ID Chromosome Map Location Canonical Transcript Gene Role
2263 10 10q26.13 NM_000141 Oncogene (PMID: 30606230)

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Variant Impact Protein Effect Variant Description Associated with drug Resistance
act mut unknown gain of function FGFR2 act mut indicates that this variant results in a gain of function in the Fgfr2 protein. However, the specific amino acid change has not been identified.
exon 5 del deletion unknown FGFR2 exon 5 deletions are in-frame deletions within the extracellular domain of the Fgfr2 protein (PMID: 33926920).
exon 7 del deletion unknown FGFR2 exon 7 deletions are in-frame deletions within the extracellular domain of the Fgfr2 protein (PMID: 33926920).
exon5 unknown unknown FGFR2 exon 5 indicates an unspecified mutation has occurred in exon 5 of the FGFR2 gene.
exon7 unknown unknown FGFR2 exon 7 indicates an unspecified mutation has occurred in exon 7 of the FGFR2 gene.
fusion fusion unknown FGFR2 fusion indicates a fusion of the FGFR2 gene, but the fusion partner is unknown.
G183fs frameshift loss of function - predicted FGFR2 G183fs results in a change in the amino acid sequence of the Fgfr2 protein beginning at aa 183 of 821, likely resulting in premature truncation of the functional protein (UniProt.org). Due to the loss of the protein kinase domain (UniProt.org), G183fs is predicted to lead to a loss of Fgfr2 protein function.
inact mut unknown loss of function FGFR2 inact mut indicates that this variant results in a loss of function of the Fgfr2 protein. However, the specific amino acid change has not been identified.
mutant unknown unknown FGFR2 mutant indicates an unspecified mutation in the FGFR2 gene.
rearrange unknown unknown FGFR2 rearrangement indicates an unspecified rearrangement of the FGFR2 gene.
T764fs frameshift unknown FGFR2 T764fs results in a change in the amino acid sequence of the Fgfr2 protein beginning at aa 764 of 821, likely resulting in premature truncation of the functional protein (UniProt.org). T764fs has been identified in sequencing studies (PMID: 35280424), but has not been biochemically characterized and therefore, its effect on Fgfr2 protein function is unknown (PubMed, Dec 2023).