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FEN1_COPC7
ID   FEN1_COPC7              Reviewed;         458 AA.
AC   A8NQC2;
DT   11-JAN-2011, integrated into UniProtKB/Swiss-Prot.
DT   11-JAN-2011, sequence version 3.
DT   03-AUG-2022, entry version 79.
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=CC1G_08033;
OS   Coprinopsis cinerea (strain Okayama-7 / 130 / ATCC MYA-4618 / FGSC 9003)
OS   (Inky cap fungus) (Hormographiella aspergillata).
OC   Eukaryota; Fungi; Dikarya; Basidiomycota; Agaricomycotina; Agaricomycetes;
OC   Agaricomycetidae; Agaricales; Psathyrellaceae; Coprinopsis.
OX   NCBI_TaxID=240176;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Okayama-7 / 130 / ATCC MYA-4618 / FGSC 9003;
RX   PubMed=20547848; DOI=10.1073/pnas.1003391107;
RA   Stajich J.E., Wilke S.K., Ahren D., Au C.H., Birren B.W., Borodovsky M.,
RA   Burns C., Canbaeck B., Casselton L.A., Cheng C.K., Deng J., Dietrich F.S.,
RA   Fargo D.C., Farman M.L., Gathman A.C., Goldberg J., Guigo R., Hoegger P.J.,
RA   Hooker J.B., Huggins A., James T.Y., Kamada T., Kilaru S., Kodira C.,
RA   Kuees U., Kupfer D., Kwan H.S., Lomsadze A., Li W., Lilly W.W., Ma L.-J.,
RA   Mackey A.J., Manning G., Martin F., Muraguchi H., Natvig D.O.,
RA   Palmerini H., Ramesh M.A., Rehmeyer C.J., Roe B.A., Shenoy N., Stanke M.,
RA   Ter-Hovhannisyan V., Tunlid A., Velagapudi R., Vision T.J., Zeng Q.,
RA   Zolan M.E., Pukkila P.J.;
RT   "Insights into evolution of multicellular fungi from the assembled
RT   chromosomes of the mushroom Coprinopsis cinerea (Coprinus cinereus).";
RL   Proc. Natl. Acad. Sci. U.S.A. 107:11889-11894(2010).
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}.
CC   -!- SEQUENCE CAUTION:
CC       Sequence=EAU86309.2; Type=Erroneous initiation; Note=Truncated N-terminus.; Evidence={ECO:0000305};
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DR   EMBL; AACS02000008; EAU86309.2; ALT_INIT; Genomic_DNA.
DR   RefSeq; XP_001835524.2; XM_001835472.2.
DR   AlphaFoldDB; A8NQC2; -.
DR   SMR; A8NQC2; -.
DR   STRING; 5346.XP_001835524.2; -.
DR   EnsemblFungi; EAU86309; EAU86309; CC1G_08033.
DR   GeneID; 6012056; -.
DR   KEGG; cci:CC1G_08033; -.
DR   eggNOG; KOG2519; Eukaryota.
DR   HOGENOM; CLU_032444_1_1_1; -.
DR   InParanoid; A8NQC2; -.
DR   OrthoDB; 1094524at2759; -.
DR   Proteomes; UP000001861; Unassembled WGS sequence.
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.
DR   PROSITE; PS00842; XPG_2; 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..458
FT                   /note="Flap endonuclease 1"
FT                   /id="PRO_0000403573"
FT   REGION          1..105
FT                   /note="N-domain"
FT   REGION          123..254
FT                   /note="I-domain"
FT   REGION          268..347
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   REGION          410..418
FT                   /note="Interaction with PCNA"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT   REGION          416..458
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        275..306
FT                   /note="Acidic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        307..324
FT                   /note="Basic and acidic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        438..452
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         47
FT                   /ligand="DNA"
FT                   /ligand_id="ChEBI:CHEBI:16991"
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   458 AA;  50783 MW;  07A85DFC12844B86 CRC64;
     MGIKGLTGLL NEHAPNSIKE HDIKTLFGRK VAIDASMSIY QFLIAVRQRD GEMLTNDAGE
     TTSHLMGFFY RTIRIVENGI KPAYVFDGKP PELKKGVLSK RFEKREEAKE EGEEAKEIGT
     AEDVDRFSRR TVKVTKQHNE ECQKLLRLMG VPCVIAPSEA EAQCAELARG GKVYAAGSED
     MDTLTFNAPI LFRHLTFSEA KKQPISEINL EAALKGLDMD MSQFVDLCIL LGCDYLEPIK
     GVGPKSALKL IREFGGLKEV VEHLREKAAA RKAEAEEEDE EEAEEPAPTS DVEMPDDEDG
     EKDSDDEEEA ERRKKAEAAK KKKAQEKAKS AKKGKGKGKG GIQIPDEWPW EEAKQIFLKP
     DVIPADQVEL EWKNPDVEGL VQFLVTEKGF SEERVRKGAE KLTKFLNAKQ QGRLDGFFTV
     KPKQAPPPAA KGKGAASKGT KRKGEDKAEG SGKKAKKK
 
 
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