NTH_ENCCU
ID NTH_ENCCU Reviewed; 238 AA.
AC Q8SRB8;
DT 01-SEP-2009, integrated into UniProtKB/Swiss-Prot.
DT 01-JUN-2002, sequence version 1.
DT 03-AUG-2022, entry version 104.
DE RecName: Full=Endonuclease III homolog {ECO:0000255|HAMAP-Rule:MF_03183};
DE EC=3.2.2.- {ECO:0000255|HAMAP-Rule:MF_03183};
DE EC=4.2.99.18 {ECO:0000255|HAMAP-Rule:MF_03183};
DE AltName: Full=Bifunctional DNA N-glycosylase/DNA-(apurinic or apyrimidinic site) lyase {ECO:0000255|HAMAP-Rule:MF_03183};
DE Short=DNA glycosylase/AP lyase {ECO:0000255|HAMAP-Rule:MF_03183};
GN Name=NTH1 {ECO:0000255|HAMAP-Rule:MF_03183}; OrderedLocusNames=ECU08_0880;
OS Encephalitozoon cuniculi (strain GB-M1) (Microsporidian parasite).
OC Eukaryota; Fungi; Fungi incertae sedis; Microsporidia; Unikaryonidae;
OC Encephalitozoon.
OX NCBI_TaxID=284813;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=GB-M1;
RX PubMed=11719806; DOI=10.1038/35106579;
RA Katinka M.D., Duprat S., Cornillot E., Metenier G., Thomarat F.,
RA Prensier G., Barbe V., Peyretaillade E., Brottier P., Wincker P.,
RA Delbac F., El Alaoui H., Peyret P., Saurin W., Gouy M., Weissenbach J.,
RA Vivares C.P.;
RT "Genome sequence and gene compaction of the eukaryote parasite
RT Encephalitozoon cuniculi.";
RL Nature 414:450-453(2001).
RN [2]
RP IDENTIFICATION BY MASS SPECTROMETRY [LARGE SCALE ANALYSIS], DEVELOPMENTAL
RP STAGE, AND SUBCELLULAR LOCATION.
RX PubMed=16691553; DOI=10.1002/pmic.200500796;
RA Brosson D., Kuhn L., Delbac F., Garin J., Vivares C.P., Texier C.;
RT "Proteomic analysis of the eukaryotic parasite Encephalitozoon cuniculi
RT (microsporidia): a reference map for proteins expressed in late sporogonial
RT stages.";
RL Proteomics 6:3625-3635(2006).
CC -!- FUNCTION: Bifunctional DNA N-glycosylase with associated
CC apurinic/apyrimidinic (AP) lyase function that catalyzes the first step
CC in base excision repair (BER), the primary repair pathway for the
CC repair of oxidative DNA damage. The DNA N-glycosylase activity releases
CC the damaged DNA base from DNA by cleaving the N-glycosidic bond,
CC leaving an AP site. The AP lyase activity cleaves the phosphodiester
CC bond 3' to the AP site by a beta-elimination. Primarily recognizes and
CC repairs oxidative base damage of pyrimidines. {ECO:0000255|HAMAP-
CC Rule:MF_03183}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=2'-deoxyribonucleotide-(2'-deoxyribose 5'-phosphate)-2'-
CC deoxyribonucleotide-DNA = a 3'-end 2'-deoxyribonucleotide-(2,3-
CC dehydro-2,3-deoxyribose 5'-phosphate)-DNA + a 5'-end 5'-monophospho-
CC 2'-deoxyribonucleoside-DNA + H(+); Xref=Rhea:RHEA:66592, Rhea:RHEA-
CC COMP:13180, Rhea:RHEA-COMP:16897, Rhea:RHEA-COMP:17067,
CC ChEBI:CHEBI:15378, ChEBI:CHEBI:136412, ChEBI:CHEBI:157695,
CC ChEBI:CHEBI:167181; EC=4.2.99.18; Evidence={ECO:0000255|HAMAP-
CC Rule:MF_03183};
CC -!- COFACTOR:
CC Name=[4Fe-4S] cluster; Xref=ChEBI:CHEBI:49883;
CC Evidence={ECO:0000255|HAMAP-Rule:MF_03183};
CC Note=Binds 1 [4Fe-4S] cluster. The cluster does not appear to play a
CC role in catalysis, but is probably involved in the proper positioning
CC of the enzyme along the DNA strand. {ECO:0000255|HAMAP-Rule:MF_03183};
CC -!- SUBCELLULAR LOCATION: Nucleus {ECO:0000255|HAMAP-Rule:MF_03183}.
CC Mitochondrion {ECO:0000255|HAMAP-Rule:MF_03183}.
CC -!- DEVELOPMENTAL STAGE: Expressed in late sporogonial stages.
CC {ECO:0000269|PubMed:16691553}.
CC -!- SIMILARITY: Belongs to the Nth/MutY family. {ECO:0000255|HAMAP-
CC Rule:MF_03183}.
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DR EMBL; AL590448; CAD26394.1; -; Genomic_DNA.
DR RefSeq; NP_597218.1; NM_001041827.1.
DR AlphaFoldDB; Q8SRB8; -.
DR SMR; Q8SRB8; -.
DR STRING; 284813.Q8SRB8; -.
DR GeneID; 859640; -.
DR KEGG; ecu:ECU08_0880; -.
DR VEuPathDB; MicrosporidiaDB:ECU08_0880; -.
DR HOGENOM; CLU_012862_3_4_1; -.
DR InParanoid; Q8SRB8; -.
DR OMA; WQQFTHL; -.
DR OrthoDB; 1322642at2759; -.
DR Proteomes; UP000000819; Chromosome VIII.
DR GO; GO:0005739; C:mitochondrion; IEA:UniProtKB-SubCell.
DR GO; GO:0005634; C:nucleus; IEA:UniProtKB-SubCell.
DR GO; GO:0051539; F:4 iron, 4 sulfur cluster binding; IEA:UniProtKB-UniRule.
DR GO; GO:0140078; F:class I DNA-(apurinic or apyrimidinic site) endonuclease activity; IEA:UniProtKB-EC.
DR GO; GO:0003677; F:DNA binding; IEA:UniProtKB-UniRule.
DR GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR GO; GO:0000703; F:oxidized pyrimidine nucleobase lesion DNA N-glycosylase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0006285; P:base-excision repair, AP site formation; IEA:UniProtKB-UniRule.
DR CDD; cd00056; ENDO3c; 1.
DR Gene3D; 1.10.1670.10; -; 1.
DR HAMAP; MF_03183; Endonuclease_III_Nth; 1.
DR InterPro; IPR011257; DNA_glycosylase.
DR InterPro; IPR003651; Endonuclease3_FeS-loop_motif.
DR InterPro; IPR004035; Endouclease-III_FeS-bd_BS.
DR InterPro; IPR003265; HhH-GPD_domain.
DR InterPro; IPR023170; HhH_base_excis_C.
DR InterPro; IPR030841; NTH1.
DR Pfam; PF00730; HhH-GPD; 1.
DR SMART; SM00478; ENDO3c; 1.
DR SMART; SM00525; FES; 1.
DR SUPFAM; SSF48150; SSF48150; 1.
DR PROSITE; PS00764; ENDONUCLEASE_III_1; 1.
PE 1: Evidence at protein level;
KW 4Fe-4S; DNA damage; DNA repair; Glycosidase; Hydrolase; Iron; Iron-sulfur;
KW Lyase; Metal-binding; Mitochondrion; Nucleus; Reference proteome;
KW Transit peptide.
FT CHAIN 1..238
FT /note="Endonuclease III homolog"
FT /id="PRO_0000382919"
FT DOMAIN 129..155
FT /note="HhH"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03183"
FT ACT_SITE 149
FT /note="Nucleophile; for N-glycosylase activity"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03183"
FT BINDING 217
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03183"
FT BINDING 224
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03183"
FT BINDING 227
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03183"
FT BINDING 233
FT /ligand="[4Fe-4S] cluster"
FT /ligand_id="ChEBI:CHEBI:49883"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03183"
FT SITE 168
FT /note="Important for catalytic activity"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03183"
SQ SEQUENCE 238 AA; 26755 MW; 3D9D7B774187F35B CRC64;
MGSASGEERE GPLGLYLEIK MQRKDIVSPV DTMGCSITPS CRTEEERRFH ILVSLLLSSQ
TKDEVTYEAM ARLRKLLPES AATDGEARGG LTIERVANSD VKHINECIKK VGFHNRKAAN
LKKIAEILRE KGLPREMKDL ISLPGIGNKM ALLYMSHACN RTVGISVDTH VHRISNRIGL
VRTRDVESTR RELERVVPRK EWKTINNILV GFGQTICVAK RPRCEECCIR GRCPSSLF
