FEN_METAR
ID FEN_METAR Reviewed; 340 AA.
AC Q0W6I0;
DT 05-FEB-2008, integrated into UniProtKB/Swiss-Prot.
DT 05-SEP-2006, sequence version 1.
DT 03-AUG-2022, entry version 90.
DE RecName: Full=Flap endonuclease 1 {ECO:0000255|HAMAP-Rule:MF_00614};
DE Short=FEN-1 {ECO:0000255|HAMAP-Rule:MF_00614};
DE EC=3.1.-.- {ECO:0000255|HAMAP-Rule:MF_00614};
DE AltName: Full=Flap structure-specific endonuclease 1 {ECO:0000255|HAMAP-Rule:MF_00614};
GN Name=fen {ECO:0000255|HAMAP-Rule:MF_00614}; OrderedLocusNames=UNCMA_21720;
GN ORFNames=RCIX607;
OS Methanocella arvoryzae (strain DSM 22066 / NBRC 105507 / MRE50).
OC Archaea; Euryarchaeota; Stenosarchaea group; Methanomicrobia;
OC Methanocellales; Methanocellaceae; Methanocella.
OX NCBI_TaxID=351160;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=DSM 22066 / NBRC 105507 / MRE50;
RX PubMed=16857943; DOI=10.1126/science.1127062;
RA Erkel C., Kube M., Reinhardt R., Liesack W.;
RT "Genome of rice cluster I archaea -- the key methane producers in the rice
RT rhizosphere.";
RL Science 313:370-372(2006).
CC -!- FUNCTION: Structure-specific nuclease with 5'-flap endonuclease and 5'-
CC 3' exonuclease activities involved in DNA replication and repair.
CC During DNA replication, cleaves the 5'-overhanging flap structure that
CC is generated by displacement synthesis when DNA polymerase encounters
CC the 5'-end of a downstream Okazaki fragment. Binds the unpaired 3'-DNA
CC end and kinks the DNA to facilitate 5' cleavage specificity. Cleaves
CC one nucleotide into the double-stranded DNA from the junction in flap
CC DNA, leaving a nick for ligation. Also involved in the base excision
CC repair (BER) pathway. Acts as a genome stabilization factor that
CC prevents flaps from equilibrating into structures that lead to
CC duplications and deletions. Also possesses 5'-3' exonuclease activity
CC on nicked or gapped double-stranded DNA (By similarity). {ECO:0000250}.
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_00614};
CC Note=Binds 2 magnesium ions per subunit. They probably participate in
CC the reaction catalyzed by the enzyme. May bind an additional third
CC magnesium ion after substrate binding. {ECO:0000255|HAMAP-
CC Rule:MF_00614};
CC -!- SUBUNIT: Interacts with PCNA. PCNA stimulates the nuclease activity
CC without altering cleavage specificity. {ECO:0000255|HAMAP-
CC Rule:MF_00614}.
CC -!- SIMILARITY: Belongs to the XPG/RAD2 endonuclease family. FEN1
CC subfamily. {ECO:0000255|HAMAP-Rule:MF_00614}.
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DR EMBL; AM114193; CAJ36013.1; -; Genomic_DNA.
DR RefSeq; WP_012036494.1; NC_009464.1.
DR AlphaFoldDB; Q0W6I0; -.
DR SMR; Q0W6I0; -.
DR STRING; 351160.RCIX607; -.
DR PRIDE; Q0W6I0; -.
DR EnsemblBacteria; CAJ36013; CAJ36013; RCIX607.
DR GeneID; 5144142; -.
DR KEGG; rci:RCIX607; -.
DR PATRIC; fig|351160.9.peg.2223; -.
DR eggNOG; arCOG04050; Archaea.
DR OMA; GSQDYDS; -.
DR OrthoDB; 41214at2157; -.
DR Proteomes; UP000000663; Chromosome.
DR GO; GO:0008409; F:5'-3' exonuclease activity; IEA:UniProtKB-UniRule.
DR GO; GO:0017108; F:5'-flap endonuclease activity; IEA:UniProtKB-UniRule.
DR GO; GO:0003677; F:DNA binding; IEA:UniProtKB-UniRule.
DR GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR GO; GO:0006281; P:DNA repair; IEA:UniProtKB-UniRule.
DR GO; GO:0043137; P:DNA replication, removal of RNA primer; IEA:UniProtKB-UniRule.
DR HAMAP; MF_00614; Fen; 1.
DR InterPro; IPR036279; 5-3_exonuclease_C_sf.
DR InterPro; IPR023426; Flap_endonuc.
DR InterPro; IPR019973; Flap_structure-sp_endonuc_arc.
DR InterPro; IPR008918; HhH2.
DR InterPro; IPR029060; PIN-like_dom_sf.
DR InterPro; IPR006086; XPG-I_dom.
DR InterPro; IPR006084; XPG/Rad2.
DR InterPro; IPR006085; XPG_DNA_repair_N.
DR PANTHER; PTHR11081; PTHR11081; 1.
DR Pfam; PF00867; XPG_I; 1.
DR Pfam; PF00752; XPG_N; 1.
DR PRINTS; PR00853; XPGRADSUPER.
DR SMART; SM00279; HhH2; 1.
DR SMART; SM00484; XPGI; 1.
DR SMART; SM00485; XPGN; 1.
DR SUPFAM; SSF47807; SSF47807; 1.
DR SUPFAM; SSF88723; SSF88723; 1.
DR TIGRFAMs; TIGR03674; fen_arch; 1.
PE 3: Inferred from homology;
KW DNA damage; DNA repair; DNA replication; Endonuclease; Exonuclease;
KW Hydrolase; Magnesium; Metal-binding; Nuclease; Reference proteome.
FT CHAIN 1..340
FT /note="Flap endonuclease 1"
FT /id="PRO_1000061335"
FT REGION 1..98
FT /note="N-domain"
FT REGION 115..256
FT /note="I-domain"
FT REGION 332..340
FT /note="Interaction with PCNA"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00614"
FT BINDING 27
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00614"
FT BINDING 80
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00614"
FT BINDING 151
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00614"
FT BINDING 153
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00614"
FT BINDING 172
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00614"
FT BINDING 174
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00614"
FT BINDING 235
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_00614"
SQ SEQUENCE 340 AA; 37779 MW; CC11A82F741FBE3B CRC64;
MGVDLGGLVE PREIELKELN NRTVAVDAYN TLYQFLSIIR QQDGAPLADD RGNVTSHLSG
IIYRVTNLVE EGMKPVFVFD GKPPSFKAET IKARAEVREA ARQMYEAAKA AGSAEAYKYA
QASTSINRQI VDDAKVLLGY MGIPFIVAPS EGEAQAAYMV SRGAADYVGS QDYDSLLFGA
PRVVRNIAIT GKRKVPRKNI YMDVKPEVIE LQEVLATLGL TREELIDMAI LVGTDYNPGI
FKVGPKTALK LVKKHGDNMP AILDELGQTI ENWEAIKEFF LHPTVTDDYQ VKWGKPEPAK
IKEFLCEEHS FSVDRVDKVL ERLTTAVSET TKQKTLSSWF
