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FPG_SYNY3
ID   FPG_SYNY3               Reviewed;         287 AA.
AC   P74290; Q55328;
DT   01-NOV-1997, integrated into UniProtKB/Swiss-Prot.
DT   23-JAN-2007, sequence version 3.
DT   03-AUG-2022, entry version 150.
DE   RecName: Full=Formamidopyrimidine-DNA glycosylase;
DE            Short=Fapy-DNA glycosylase;
DE            EC=3.2.2.23;
DE   AltName: Full=DNA-(apurinic or apyrimidinic site) lyase MutM;
DE            Short=AP lyase MutM;
DE            EC=4.2.99.18;
GN   Name=mutM; Synonyms=fpg; OrderedLocusNames=slr1689;
OS   Synechocystis sp. (strain PCC 6803 / Kazusa).
OC   Bacteria; Cyanobacteria; Synechococcales; Merismopediaceae; Synechocystis;
OC   unclassified Synechocystis.
OX   NCBI_TaxID=1111708;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=PCC 6803 / Kazusa;
RX   PubMed=8905231; DOI=10.1093/dnares/3.3.109;
RA   Kaneko T., Sato S., Kotani H., Tanaka A., Asamizu E., Nakamura Y.,
RA   Miyajima N., Hirosawa M., Sugiura M., Sasamoto S., Kimura T., Hosouchi T.,
RA   Matsuno A., Muraki A., Nakazaki N., Naruo K., Okumura S., Shimpo S.,
RA   Takeuchi C., Wada T., Watanabe A., Yamada M., Yasuda M., Tabata S.;
RT   "Sequence analysis of the genome of the unicellular cyanobacterium
RT   Synechocystis sp. strain PCC6803. II. Sequence determination of the entire
RT   genome and assignment of potential protein-coding regions.";
RL   DNA Res. 3:109-136(1996).
RN   [2]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA] OF 1-169.
RX   PubMed=2509456; DOI=10.1016/s0021-9258(18)51474-5;
RA   Chitnis P.R., Reilly P.A., Miedel M.C., Nelson N.;
RT   "Structure and targeted mutagenesis of the gene encoding 8-kDa subunit of
RT   photosystem I from the cyanobacterium Synechocystis sp. PCC 6803.";
RL   J. Biol. Chem. 264:18374-18380(1989).
CC   -!- FUNCTION: Involved in base excision repair of DNA damaged by oxidation
CC       or by mutagenic agents. Acts as DNA glycosylase that recognizes and
CC       removes damaged bases. Has a preference for oxidized purines, such as
CC       7,8-dihydro-8-oxoguanine (8-oxoG). Has AP (apurinic/apyrimidinic) lyase
CC       activity and introduces nicks in the DNA strand. Cleaves the DNA
CC       backbone by beta-delta elimination to generate a single-strand break at
CC       the site of the removed base with both 3'- and 5'-phosphates (By
CC       similarity). {ECO:0000250}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=Hydrolysis of DNA containing ring-opened 7-methylguanine
CC         residues, releasing 2,6-diamino-4-hydroxy-5-(N-
CC         methyl)formamidopyrimidine.; EC=3.2.2.23;
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;
CC   -!- COFACTOR:
CC       Name=Zn(2+); Xref=ChEBI:CHEBI:29105; Evidence={ECO:0000250};
CC       Note=Binds 1 zinc ion per subunit. {ECO:0000250};
CC   -!- SUBUNIT: Monomer. {ECO:0000250}.
CC   -!- SIMILARITY: Belongs to the FPG family. {ECO:0000305}.
CC   -!- SEQUENCE CAUTION:
CC       Sequence=AAA88630.1; Type=Frameshift; Evidence={ECO:0000305};
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DR   EMBL; BA000022; BAA18384.1; -; Genomic_DNA.
DR   EMBL; J05079; AAA88630.1; ALT_FRAME; Genomic_DNA.
DR   PIR; S75925; S75925.
DR   AlphaFoldDB; P74290; -.
DR   SMR; P74290; -.
DR   STRING; 1148.1653470; -.
DR   PaxDb; P74290; -.
DR   EnsemblBacteria; BAA18384; BAA18384; BAA18384.
DR   KEGG; syn:slr1689; -.
DR   eggNOG; COG0266; Bacteria.
DR   InParanoid; P74290; -.
DR   OMA; GVHLRMT; -.
DR   PhylomeDB; P74290; -.
DR   Proteomes; UP000001425; Chromosome.
DR   GO; GO:0034039; F:8-oxo-7,8-dihydroguanine DNA N-glycosylase activity; IBA:GO_Central.
DR   GO; GO:0140078; F:class I DNA-(apurinic or apyrimidinic site) endonuclease activity; IEA:UniProtKB-EC.
DR   GO; GO:0003684; F:damaged DNA binding; IEA:InterPro.
DR   GO; GO:0019104; F:DNA N-glycosylase activity; IBA:GO_Central.
DR   GO; GO:0003906; F:DNA-(apurinic or apyrimidinic site) endonuclease activity; IBA:GO_Central.
DR   GO; GO:0008270; F:zinc ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0006284; P:base-excision repair; IBA:GO_Central.
DR   Gene3D; 3.20.190.10; -; 1.
DR   HAMAP; MF_00103; Fapy_DNA_glycosyl; 1.
DR   InterPro; IPR015886; DNA_glyclase/AP_lyase_DNA-bd.
DR   InterPro; IPR015887; DNA_glyclase_Znf_dom_DNA_BS.
DR   InterPro; IPR020629; Formamido-pyr_DNA_Glyclase.
DR   InterPro; IPR012319; FPG_cat.
DR   InterPro; IPR035937; MutM-like_N-ter.
DR   InterPro; IPR010979; Ribosomal_S13-like_H2TH.
DR   InterPro; IPR000214; Znf_DNA_glyclase/AP_lyase.
DR   InterPro; IPR010663; Znf_FPG/IleRS.
DR   Pfam; PF01149; Fapy_DNA_glyco; 1.
DR   Pfam; PF06831; H2TH; 1.
DR   Pfam; PF06827; zf-FPG_IleRS; 1.
DR   SMART; SM00898; Fapy_DNA_glyco; 1.
DR   SMART; SM01232; H2TH; 1.
DR   SUPFAM; SSF46946; SSF46946; 1.
DR   SUPFAM; SSF81624; SSF81624; 1.
DR   TIGRFAMs; TIGR00577; fpg; 1.
DR   PROSITE; PS51068; FPG_CAT; 1.
DR   PROSITE; PS01242; ZF_FPG_1; 1.
DR   PROSITE; PS51066; ZF_FPG_2; 1.
PE   3: Inferred from homology;
KW   DNA damage; DNA repair; DNA-binding; Glycosidase; Hydrolase; Lyase;
KW   Metal-binding; Multifunctional enzyme; Reference proteome; Zinc;
KW   Zinc-finger.
FT   INIT_MET        1
FT                   /note="Removed"
FT                   /evidence="ECO:0000250"
FT   CHAIN           2..287
FT                   /note="Formamidopyrimidine-DNA glycosylase"
FT                   /id="PRO_0000170879"
FT   ZN_FING         249..283
FT                   /note="FPG-type"
FT   ACT_SITE        2
FT                   /note="Schiff-base intermediate with DNA"
FT                   /evidence="ECO:0000250"
FT   ACT_SITE        3
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000250"
FT   ACT_SITE        60
FT                   /note="Proton donor; for beta-elimination activity"
FT                   /evidence="ECO:0000250"
FT   ACT_SITE        273
FT                   /note="Proton donor; for delta-elimination activity"
FT                   /evidence="ECO:0000250"
FT   BINDING         100
FT                   /ligand="DNA"
FT                   /ligand_id="ChEBI:CHEBI:16991"
FT                   /evidence="ECO:0000250"
FT   BINDING         119
FT                   /ligand="DNA"
FT                   /ligand_id="ChEBI:CHEBI:16991"
FT                   /evidence="ECO:0000250"
FT   CONFLICT        129..130
FT                   /note="GD -> AI (in Ref. 2; AAA88630)"
FT                   /evidence="ECO:0000305"
SQ   SEQUENCE   287 AA;  32062 MW;  FB9B4FE65916CC08 CRC64;
     MPELPEVETV CRGLNRLTLE QTIGGGEVLL DRSLAYPVSV EDFQKQITGC RLVGWQRRGK
     YLLGELRSNQ APGPAGWLGC HLRMTGQLLW TERDQQRPRH TRVVLHFEGG WELRFVDTRT
     FGKVWLLPGD RPWAEVMTGL GQLGPEPFGA DFTAEYLYEK LKSSRRPLKN ALLDQRLVAG
     LGNIYADEVL FFCGFHPTMA SNQVSLQDCE LIHQQIQATL TAAIEAGGTS FSDYRQVTGI
     NGNYGGMAQV YGREGEPCRH CGTVIAKIKL GGRSAHFCPQ CQPKLER
 
 
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