NCBI Accession #
NP_001242313.1
NCBI GenBank Nucleotide #
NM_001255384.2
NCBI Official Full Name
flap endonuclease 1
NCBI Official Symbol
LOC100808044
NCBI Official Synonym Symbols
FEN1; FEN-1
NCBI Protein Information
flap endonuclease 1
UniProt Synonym Gene Names
FEN-1
UniProt Protein Name
Flap endonuclease 1
UniProt Synonym Protein Names
Flap structure-specific endonuclease 1
UniProt Primary Accession #
C6TEX6
UniProt Related Accession #
C6TEX6
UniProt Comments
Structure-specific nuclease with 5'-flap endonuclease and 5'-3' exonuclease activities involved in DNA replication and repair. During DNA replication, cleaves the 5'-overhanging flap structure that is generated by displacement synthesis when DNA polymerase encounters the 5'-end of a downstream Okazaki fragment. It enters the flap from the 5'-end and then tracks to cleave the flap base, leaving a nick for ligation. Also involved in the long patch base excision repair (LP-BER) pathway, by cleaving within the apurinic/apyrimidinic (AP) site-terminated flap. Acts as a genome stabilization factor that prevents flaps from equilibrating into structurs that lead to duplications and deletions. Also possesses 5'-3' exonuclease activity on nicked or gapped double-stranded DNA, and exhibits RNase H activity. Also involved in replication and repair of rDNA and in repairing mitochondrial DNA.