FEN1_MICCC
ID FEN1_MICCC Reviewed; 384 AA.
AC C1E3X9;
DT 11-JAN-2011, integrated into UniProtKB/Swiss-Prot.
DT 26-MAY-2009, sequence version 1.
DT 03-AUG-2022, entry version 56.
DE RecName: Full=Flap endonuclease 1 {ECO:0000255|HAMAP-Rule:MF_03140};
DE Short=FEN-1 {ECO:0000255|HAMAP-Rule:MF_03140};
DE EC=3.1.-.- {ECO:0000255|HAMAP-Rule:MF_03140};
DE AltName: Full=Flap structure-specific endonuclease 1 {ECO:0000255|HAMAP-Rule:MF_03140};
GN Name=FEN1 {ECO:0000255|HAMAP-Rule:MF_03140}; ORFNames=MICPUN_96332;
OS Micromonas commoda (strain RCC299 / NOUM17 / CCMP2709) (Picoplanktonic
OS green alga).
OC Eukaryota; Viridiplantae; Chlorophyta; Mamiellophyceae; Mamiellales;
OC Mamiellaceae; Micromonas.
OX NCBI_TaxID=296587;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=RCC299 / NOUM17;
RX PubMed=19359590; DOI=10.1126/science.1167222;
RA Worden A.Z., Lee J.H., Mock T., Rouze P., Simmons M.P., Aerts A.L.,
RA Allen A.E., Cuvelier M.L., Derelle E., Everett M.V., Foulon E.,
RA Grimwood J., Gundlach H., Henrissat B., Napoli C., McDonald S.M.,
RA Parker M.S., Rombauts S., Salamov A., Von Dassow P., Badger J.H.,
RA Coutinho P.M., Demir E., Dubchak I., Gentemann C., Eikrem W., Gready J.E.,
RA John U., Lanier W., Lindquist E.A., Lucas S., Mayer K.F., Moreau H.,
RA Not F., Otillar R., Panaud O., Pangilinan J., Paulsen I., Piegu B.,
RA Poliakov A., Robbens S., Schmutz J., Toulza E., Wyss T., Zelensky A.,
RA Zhou K., Armbrust E.V., Bhattacharya D., Goodenough U.W., Van de Peer Y.,
RA Grigoriev I.V.;
RT "Green evolution and dynamic adaptations revealed by genomes of the marine
RT picoeukaryotes Micromonas.";
RL Science 324:268-272(2009).
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. It enters the flap from
CC the 5'-end and then tracks to cleave the flap base, leaving a nick for
CC ligation. Also involved in the long patch base excision repair (LP-BER)
CC pathway, by cleaving within the apurinic/apyrimidinic (AP) site-
CC terminated flap. Acts as a genome stabilization factor that prevents
CC flaps from equilibrating into structures that lead to duplications and
CC deletions. Also possesses 5'-3' exonuclease activity on nicked or
CC gapped double-stranded DNA, and exhibits RNase H activity. Also
CC involved in replication and repair of rDNA and in repairing
CC mitochondrial DNA. {ECO:0000255|HAMAP-Rule:MF_03140}.
CC -!- COFACTOR:
CC Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_03140};
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_03140};
CC -!- SUBUNIT: Interacts with PCNA. Three molecules of FEN1 bind to one PCNA
CC trimer with each molecule binding to one PCNA monomer. PCNA stimulates
CC the nuclease activity without altering cleavage specificity.
CC {ECO:0000255|HAMAP-Rule:MF_03140}.
CC -!- SUBCELLULAR LOCATION: Nucleus, nucleolus {ECO:0000255|HAMAP-
CC Rule:MF_03140}. Nucleus, nucleoplasm {ECO:0000255|HAMAP-Rule:MF_03140}.
CC Mitochondrion {ECO:0000255|HAMAP-Rule:MF_03140}. Note=Resides mostly in
CC the nucleoli and relocalizes to the nucleoplasm upon DNA damage.
CC {ECO:0000255|HAMAP-Rule:MF_03140}.
CC -!- PTM: Phosphorylated. Phosphorylation upon DNA damage induces
CC relocalization to the nuclear plasma. {ECO:0000255|HAMAP-
CC Rule:MF_03140}.
CC -!- SIMILARITY: Belongs to the XPG/RAD2 endonuclease family. FEN1
CC subfamily. {ECO:0000255|HAMAP-Rule:MF_03140}.
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DR EMBL; CP001325; ACO63012.1; -; Genomic_DNA.
DR RefSeq; XP_002501754.1; XM_002501708.1.
DR AlphaFoldDB; C1E3X9; -.
DR SMR; C1E3X9; -.
DR STRING; 296587.XP_002501754.1; -.
DR GeneID; 8242661; -.
DR KEGG; mis:MICPUN_96332; -.
DR eggNOG; KOG2519; Eukaryota.
DR InParanoid; C1E3X9; -.
DR OMA; GSQDYDS; -.
DR OrthoDB; 1094524at2759; -.
DR Proteomes; UP000002009; Chromosome 4.
DR GO; GO:0005739; C:mitochondrion; IEA:UniProtKB-SubCell.
DR GO; GO:0005730; C:nucleolus; IEA:UniProtKB-SubCell.
DR GO; GO:0005654; C:nucleoplasm; IEA:UniProtKB-SubCell.
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:0006284; P:base-excision 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; 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 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 PROSITE; PS00841; XPG_1; 1.
PE 3: Inferred from homology;
KW DNA damage; DNA repair; DNA replication; Endonuclease; Exonuclease;
KW Hydrolase; Magnesium; Metal-binding; Mitochondrion; Nuclease; Nucleus;
KW Phosphoprotein; Reference proteome.
FT CHAIN 1..384
FT /note="Flap endonuclease 1"
FT /id="PRO_0000403521"
FT REGION 1..105
FT /note="N-domain"
FT REGION 123..254
FT /note="I-domain"
FT REGION 337..345
FT /note="Interaction with PCNA"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT REGION 353..384
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 355..369
FT /note="Basic and acidic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT BINDING 34
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT BINDING 71
FT /ligand="DNA"
FT /ligand_id="ChEBI:CHEBI:16991"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT BINDING 87
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT BINDING 159
FT /ligand="DNA"
FT /ligand_id="ChEBI:CHEBI:16991"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT BINDING 159
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT BINDING 161
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT BINDING 180
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT BINDING 182
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT BINDING 232
FT /ligand="DNA"
FT /ligand_id="ChEBI:CHEBI:16991"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT BINDING 234
FT /ligand="DNA"
FT /ligand_id="ChEBI:CHEBI:16991"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT BINDING 234
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
SQ SEQUENCE 384 AA; 42592 MW; C138226533436CDF CRC64;
MGIKGLTKLL SDYAPGCMRE QKFEGYLDRK VAIDASMHIY QFMMVVGRSG EQQLTNEAGE
VTSHLQGMFT RTLRMLKAGI KPVYVFDGKP PTMKGGELAK RKDKREAAES ALEKAKEAGD
QEEIEKLSKR TVRVSKVHSE EVMKLARFLG LPVFEAPCEA EATCAALCKA GLVYAAASED
MDTLCFSTPK LARNLMAPSS QEKPILEFDF DKLLAGLELT WDQFIDVCIL CGCDYCDSIK
GIGPVNALKY IKQYGNIEGL LEHLDKEKYP VPDDWPYKEA RVLFKNPEVV QTDGLTLKWT
APDEEAVVAF LCGEKSFNED RIRKQLADLK KARSQGGQNR LETFFGAATV KSSTVGKRKE
PEKGKGKFGA AGGKKSKGVT KRKF
