FEN1_TRYCC
ID FEN1_TRYCC Reviewed; 393 AA.
AC Q4DKQ5;
DT 11-JAN-2011, integrated into UniProtKB/Swiss-Prot.
DT 13-SEP-2005, sequence version 1.
DT 03-AUG-2022, entry version 73.
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};
GN ORFNames=Tc00.1047053511867.110;
OS Trypanosoma cruzi (strain CL Brener).
OC Eukaryota; Discoba; Euglenozoa; Kinetoplastea; Metakinetoplastina;
OC Trypanosomatida; Trypanosomatidae; Trypanosoma; Schizotrypanum.
OX NCBI_TaxID=353153;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=CL Brener;
RX PubMed=16020725; DOI=10.1126/science.1112631;
RA El-Sayed N.M.A., Myler P.J., Bartholomeu D.C., Nilsson D., Aggarwal G.,
RA Tran A.-N., Ghedin E., Worthey E.A., Delcher A.L., Blandin G.,
RA Westenberger S.J., Caler E., Cerqueira G.C., Branche C., Haas B.,
RA Anupama A., Arner E., Aslund L., Attipoe P., Bontempi E., Bringaud F.,
RA Burton P., Cadag E., Campbell D.A., Carrington M., Crabtree J., Darban H.,
RA da Silveira J.F., de Jong P., Edwards K., Englund P.T., Fazelina G.,
RA Feldblyum T., Ferella M., Frasch A.C., Gull K., Horn D., Hou L., Huang Y.,
RA Kindlund E., Klingbeil M., Kluge S., Koo H., Lacerda D., Levin M.J.,
RA Lorenzi H., Louie T., Machado C.R., McCulloch R., McKenna A., Mizuno Y.,
RA Mottram J.C., Nelson S., Ochaya S., Osoegawa K., Pai G., Parsons M.,
RA Pentony M., Pettersson U., Pop M., Ramirez J.L., Rinta J., Robertson L.,
RA Salzberg S.L., Sanchez D.O., Seyler A., Sharma R., Shetty J., Simpson A.J.,
RA Sisk E., Tammi M.T., Tarleton R., Teixeira S., Van Aken S., Vogt C.,
RA Ward P.N., Wickstead B., Wortman J., White O., Fraser C.M., Stuart K.D.,
RA Andersson B.;
RT "The genome sequence of Trypanosoma cruzi, etiologic agent of Chagas
RT disease.";
RL Science 309:409-415(2005).
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; AAHK01000375; EAN93107.1; -; Genomic_DNA.
DR RefSeq; XP_814958.1; XM_809865.1.
DR AlphaFoldDB; Q4DKQ5; -.
DR SMR; Q4DKQ5; -.
DR STRING; 5693.XP_814958.1; -.
DR PaxDb; Q4DKQ5; -.
DR EnsemblProtists; EAN93107; EAN93107; Tc00.1047053511867.110.
DR GeneID; 3546599; -.
DR KEGG; tcr:511867.110; -.
DR eggNOG; KOG2519; Eukaryota.
DR OMA; GSQDYDS; -.
DR OrthoDB; 1094524at2759; -.
DR Proteomes; UP000002296; 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..393
FT /note="Flap endonuclease 1"
FT /id="PRO_0000403551"
FT REGION 1..108
FT /note="N-domain"
FT REGION 126..257
FT /note="I-domain"
FT REGION 340..348
FT /note="Interaction with PCNA"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
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 74
FT /ligand="DNA"
FT /ligand_id="ChEBI:CHEBI:16991"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT BINDING 90
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT BINDING 162
FT /ligand="DNA"
FT /ligand_id="ChEBI:CHEBI:16991"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT BINDING 162
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT BINDING 164
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT BINDING 183
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT BINDING 185
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT BINDING 235
FT /ligand="DNA"
FT /ligand_id="ChEBI:CHEBI:16991"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT BINDING 237
FT /ligand="DNA"
FT /ligand_id="ChEBI:CHEBI:16991"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT BINDING 237
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="2"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
SQ SEQUENCE 393 AA; 44266 MW; 6069731AC9AFD842 CRC64;
MGILGLSKLL YDRSPAAIRE RELKNYFGRR IAIDASMTIY QFIIAMKGFQ DGQGMELTNE
AGEVTSHLNG LFARTLRMVD EGLRPIYVFD GKPPTLKASE LQERRQRAEE AQQLFDTAKE
EGNDELMEKM SKRTVRVSRE QLEEAKKLLQ LMGIPVVQAP SEAEAQCAEL VKKKKAWAVA
TEDMDALTFG APVMLRHLTY SEAKKRPIAE FHLDEILGIT GLTMTQFIDL CILLGCDYVP
KIPGIGPQKA WEGIKKHGDI ETLLQSLDAG RHSVPEGFHY EEARQFFLKP EVTPAEEIEI
QFREPDEEGL VKFLVEEKLF NKDRVLKGIQ RLRNALTRKT QGRLDQFFTI TRPVTKPNTC
DAKAGVKRGH SAIALSGTLQ QKGSSGHKKV VKK
