ID A0A2K5APP6_9ARCH Unreviewed; 345 AA.
AC A0A2K5APP6;
DT 28-MAR-2018, integrated into UniProtKB/TrEMBL.
DT 28-MAR-2018, sequence version 1.
DT 24-JAN-2024, entry version 35.
DE RecName: Full=Flap endonuclease 1 {ECO:0000256|HAMAP-Rule:MF_00614};
DE Short=FEN-1 {ECO:0000256|HAMAP-Rule:MF_00614};
DE EC=3.1.-.- {ECO:0000256|HAMAP-Rule:MF_00614};
DE AltName: Full=Flap structure-specific endonuclease 1 {ECO:0000256|HAMAP-Rule:MF_00614};
GN Name=fen {ECO:0000256|HAMAP-Rule:MF_00614,
GN ECO:0000313|EMBL:SPC33621.1};
GN ORFNames=NCAV_0427 {ECO:0000313|EMBL:SPC33621.1};
OS Candidatus Nitrosocaldus cavascurensis.
OC Archaea; Nitrososphaerota; Nitrososphaeria; Candidatus Nitrosocaldales;
OC Candidatus Nitrosocaldaceae; Candidatus Nitrosocaldus.
OX NCBI_TaxID=2058097 {ECO:0000313|EMBL:SPC33621.1, ECO:0000313|Proteomes:UP000236248};
RN [1] {ECO:0000313|Proteomes:UP000236248}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=SCU2 {ECO:0000313|Proteomes:UP000236248};
RA Kerou L M.;
RL Submitted (JAN-2018) to the EMBL/GenBank/DDBJ databases.
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 structurs that lead to
CC duplications and deletions. Also possesses 5'-3' exonuclease activity
CC on nicked or gapped double-stranded DNA. {ECO:0000256|HAMAP-
CC Rule:MF_00614}.
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000256|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:0000256|HAMAP-
CC Rule:MF_00614};
CC -!- SUBUNIT: Interacts with PCNA. PCNA stimulates the nuclease activity
CC without altering cleavage specificity. {ECO:0000256|HAMAP-
CC Rule:MF_00614}.
CC -!- SIMILARITY: Belongs to the XPG/RAD2 endonuclease family. FEN1
CC subfamily. {ECO:0000256|HAMAP-Rule:MF_00614}.
CC -!- CAUTION: Lacks conserved residue(s) required for the propagation of
CC feature annotation. {ECO:0000256|HAMAP-Rule:MF_00614}.
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DR EMBL; LT981265; SPC33621.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A2K5APP6; -.
DR KEGG; ncv:NCAV_0427; -.
DR Proteomes; UP000236248; Chromosome ncav.
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 CDD; cd09903; H3TH_FEN1-Arc; 1.
DR CDD; cd09867; PIN_FEN1; 1.
DR Gene3D; 1.10.150.20; 5' to 3' exonuclease, C-terminal subdomain; 1.
DR Gene3D; 3.40.50.1010; 5'-nuclease; 1.
DR HAMAP; MF_00614; Fen; 1.
DR InterPro; IPR036279; 5-3_exonuclease_C_sf.
DR InterPro; IPR023426; Flap_endonuc.
DR InterPro; IPR019973; Flap_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; IPR019974; XPG_CS.
DR InterPro; IPR006085; XPG_DNA_repair_N.
DR NCBIfam; TIGR03674; fen_arch; 1.
DR PANTHER; PTHR11081:SF9; FLAP ENDONUCLEASE 1; 1.
DR PANTHER; PTHR11081; FLAP ENDONUCLEASE FAMILY MEMBER; 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; 5' to 3' exonuclease, C-terminal subdomain; 1.
DR SUPFAM; SSF88723; PIN domain-like; 1.
DR PROSITE; PS00841; XPG_1; 1.
PE 3: Inferred from homology;
KW DNA damage {ECO:0000256|ARBA:ARBA00022763, ECO:0000256|HAMAP-
KW Rule:MF_00614};
KW DNA repair {ECO:0000256|ARBA:ARBA00023204, ECO:0000256|HAMAP-
KW Rule:MF_00614};
KW DNA replication {ECO:0000256|ARBA:ARBA00022705, ECO:0000256|HAMAP-
KW Rule:MF_00614};
KW Endonuclease {ECO:0000256|ARBA:ARBA00022759, ECO:0000256|HAMAP-
KW Rule:MF_00614};
KW Exonuclease {ECO:0000256|ARBA:ARBA00022839, ECO:0000256|HAMAP-
KW Rule:MF_00614};
KW Hydrolase {ECO:0000256|ARBA:ARBA00022801, ECO:0000256|HAMAP-Rule:MF_00614};
KW Magnesium {ECO:0000256|ARBA:ARBA00022842, ECO:0000256|HAMAP-Rule:MF_00614};
KW Metal-binding {ECO:0000256|ARBA:ARBA00022723, ECO:0000256|HAMAP-
KW Rule:MF_00614};
KW Nuclease {ECO:0000256|ARBA:ARBA00022722, ECO:0000256|HAMAP-Rule:MF_00614}.
FT DOMAIN 1..101
FT /note="XPG N-terminal"
FT /evidence="ECO:0000259|SMART:SM00485"
FT DOMAIN 140..221
FT /note="XPG-I"
FT /evidence="ECO:0000259|SMART:SM00484"
FT REGION 1..98
FT /note="N-domain"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00614"
FT BINDING 27
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00614"
FT BINDING 80
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00614"
FT BINDING 152
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00614"
FT BINDING 154
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00614"
FT BINDING 173
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00614"
FT BINDING 175
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00614"
FT BINDING 236
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_00614"
SQ SEQUENCE 345 AA; 38737 MW; 6E8C3386ED91D6BD CRC64;
MGTDLKPLIK AKEIKLESLA GKVIAIDAYN ALYQFLATIR GYTGEPLMDA HGRVTSHLSG
LFYRSVNLLA AGIKPVYVFD GKPPALKHAE LESRRRSKEE ALAKYEEALQ EGRFEDARKY
AQATSMLKDY MLNDAKTLLT LMGIPYVEAP SEGEATAAYL TIIGLAYATA SQDYDSLLFG
SRRLVRNLTI SGRRKLPNKN VYVDVNPEII ELDELLRDLG ISREALVDVA ILIGTDFNPE
GFKGIGAKKA LQLIKKYGRL EDIDVEGLRD ELKMVDYNAI REIFLKPEVA EPSNVNIIFK
EVDEQGVTRF LCDEHNFSRE RVSNAIKRLN EAIRIRGSSL EQWFS
//
