FEN12_LACBS
ID FEN12_LACBS Reviewed; 469 AA.
AC B0E412;
DT 11-JAN-2011, integrated into UniProtKB/Swiss-Prot.
DT 26-FEB-2008, sequence version 1.
DT 03-AUG-2022, entry version 70.
DE RecName: Full=Flap endonuclease 1-B {ECO:0000255|HAMAP-Rule:MF_03140};
DE Short=FEN-1-B {ECO:0000255|HAMAP-Rule:MF_03140};
DE EC=3.1.-.- {ECO:0000255|HAMAP-Rule:MF_03140};
DE AltName: Full=Flap structure-specific endonuclease 1-B {ECO:0000255|HAMAP-Rule:MF_03140};
GN Name=FEN12 {ECO:0000255|HAMAP-Rule:MF_03140}; ORFNames=LACBIDRAFT_192371;
OS Laccaria bicolor (strain S238N-H82 / ATCC MYA-4686) (Bicoloured deceiver)
OS (Laccaria laccata var. bicolor).
OC Eukaryota; Fungi; Dikarya; Basidiomycota; Agaricomycotina; Agaricomycetes;
OC Agaricomycetidae; Agaricales; Tricholomataceae; Laccaria.
OX NCBI_TaxID=486041;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=S238N-H82 / ATCC MYA-4686;
RX PubMed=18322534; DOI=10.1038/nature06556;
RA Martin F., Aerts A., Ahren D., Brun A., Danchin E.G.J., Duchaussoy F.,
RA Gibon J., Kohler A., Lindquist E., Pereda V., Salamov A., Shapiro H.J.,
RA Wuyts J., Blaudez D., Buee M., Brokstein P., Canbaeck B., Cohen D.,
RA Courty P.E., Coutinho P.M., Delaruelle C., Detter J.C., Deveau A.,
RA DiFazio S., Duplessis S., Fraissinet-Tachet L., Lucic E., Frey-Klett P.,
RA Fourrey C., Feussner I., Gay G., Grimwood J., Hoegger P.J., Jain P.,
RA Kilaru S., Labbe J., Lin Y.C., Legue V., Le Tacon F., Marmeisse R.,
RA Melayah D., Montanini B., Muratet M., Nehls U., Niculita-Hirzel H.,
RA Oudot-Le Secq M.P., Peter M., Quesneville H., Rajashekar B., Reich M.,
RA Rouhier N., Schmutz J., Yin T., Chalot M., Henrissat B., Kuees U.,
RA Lucas S., Van de Peer Y., Podila G.K., Polle A., Pukkila P.J.,
RA Richardson P.M., Rouze P., Sanders I.R., Stajich J.E., Tunlid A.,
RA Tuskan G., Grigoriev I.V.;
RT "The genome of Laccaria bicolor provides insights into mycorrhizal
RT symbiosis.";
RL Nature 452:88-92(2008).
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; DS547292; EDQ98419.1; -; Genomic_DNA.
DR RefSeq; XP_001890929.1; XM_001890894.1.
DR AlphaFoldDB; B0E412; -.
DR SMR; B0E412; -.
DR STRING; 486041.B0E412; -.
DR EnsemblFungi; EDQ98419; EDQ98419; LACBIDRAFT_192371.
DR GeneID; 6086585; -.
DR KEGG; lbc:LACBIDRAFT_192371; -.
DR HOGENOM; CLU_032444_1_1_1; -.
DR InParanoid; B0E412; -.
DR OrthoDB; 1094524at2759; -.
DR Proteomes; UP000001194; 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..469
FT /note="Flap endonuclease 1-B"
FT /id="PRO_0000403581"
FT REGION 1..103
FT /note="N-domain"
FT REGION 121..257
FT /note="I-domain"
FT REGION 274..354
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT REGION 412..420
FT /note="Interaction with PCNA"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT REGION 424..469
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 284..316
FT /note="Acidic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT COMPBIAS 439..463
FT /note="Basic and acidic residues"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT BINDING 32
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT BINDING 45
FT /ligand="DNA"
FT /ligand_id="ChEBI:CHEBI:16991"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT BINDING 69
FT /ligand="DNA"
FT /ligand_id="ChEBI:CHEBI:16991"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT BINDING 85
FT /ligand="Mg(2+)"
FT /ligand_id="ChEBI:CHEBI:18420"
FT /ligand_label="1"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT BINDING 157
FT /ligand="DNA"
FT /ligand_id="ChEBI:CHEBI:16991"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03140"
FT BINDING 157
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="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 469 AA; 52202 MW; 0619EBFB42CFBF13 CRC64;
MGIKGLTGLL SQHAPKAIKE IKTLFGRKVA IDASMSIYQF LIAVRQKDGE LLTNDAGETT
RYLMGLFYRT LRIVENGIKP AYIFDGKPPE LKKGVLSKRL ERREEAKEEG EEAKETGTVE
DVDRFSRRTV KVTREHNQEC QRLLRLMGIP VVIAPSEAEA QCAELARGGK VYIALYYAAG
SEDMDTLTFN APILFRHLTF SEAKKQPISE INLKEALEGP LYSFPTFIDL CILLGCDYLE
PIKGVGPKSA LKLIREYGGL KGVVKHLREK AATQKAAQAA VESDEESEHE EEDEPAPTSD
VEMPDPVEED QDGEEEAEPK SSQATPKKKK ASSKTKEKRK GKGGGGMQIP EEWPWEEAKK
IFKRPSHVHR DLEWTNPDVD GLVQFLVNEK GFNEDRVRKG AEKLQKFLNS KQQGRLDGFF
SVKPKEKAAA PAPVGKAKGK GKIDAKAKGT KRKVDEKAES SAGKKPRKK
