ID FPG_HAEIN Reviewed; 271 AA. AC P44948; DT 01-NOV-1995, integrated into UniProtKB/Swiss-Prot. DT 23-JAN-2007, sequence version 3. DT 28-JAN-2026, entry version 160. 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=HI_0946; OS Haemophilus influenzae (strain ATCC 51907 / DSM 11121 / KW20 / Rd). OC Bacteria; Pseudomonadati; Pseudomonadota; Gammaproteobacteria; OC Pasteurellales; Pasteurellaceae; Haemophilus. OX NCBI_TaxID=71421; RN [1] RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA]. RC STRAIN=ATCC 51907 / DSM 11121 / KW20 / Rd; RX PubMed=7542800; DOI=10.1126/science.7542800; RA Fleischmann R.D., Adams M.D., White O., Clayton R.A., Kirkness E.F., RA Kerlavage A.R., Bult C.J., Tomb J.-F., Dougherty B.A., Merrick J.M., RA McKenney K., Sutton G.G., FitzHugh W., Fields C.A., Gocayne J.D., RA Scott J.D., Shirley R., Liu L.-I., Glodek A., Kelley J.M., Weidman J.F., RA Phillips C.A., Spriggs T., Hedblom E., Cotton M.D., Utterback T.R., RA Hanna M.C., Nguyen D.T., Saudek D.M., Brandon R.C., Fine L.D., RA Fritchman J.L., Fuhrmann J.L., Geoghagen N.S.M., Gnehm C.L., McDonald L.A., RA Small K.V., Fraser C.M., Smith H.O., Venter J.C.; RT "Whole-genome random sequencing and assembly of Haemophilus influenzae RT Rd."; RL Science 269:496-512(1995). CC -!- FUNCTION: Involved in base excision repair of DNA damaged by oxidation CC or by mutagenic agents. Acts as a 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'-phospho-2'- CC 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 --------------------------------------------------------------------------- CC Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms CC Distributed under the Creative Commons Attribution (CC BY 4.0) License CC --------------------------------------------------------------------------- DR EMBL; L42023; AAC22606.1; -; Genomic_DNA. DR PIR; A64104; A64104. DR AlphaFoldDB; P44948; -. DR SMR; P44948; -. DR STRING; 71421.HI_0946; -. DR EnsemblBacteria; AAC22606; AAC22606; HI_0946. DR KEGG; hin:HI_0946; -. DR PATRIC; fig|71421.8.peg.987; -. DR eggNOG; COG0266; Bacteria. DR HOGENOM; CLU_038423_1_1_6; -. DR OrthoDB; 9800855at2; -. DR PhylomeDB; P44948; -. DR BioCyc; HINF71421:G1GJ1-986-MONOMER; -. DR Proteomes; UP000000579; 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: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 CDD; cd08966; EcFpg-like_N; 1. DR FunFam; 1.10.8.50:FF:000003; Formamidopyrimidine-DNA glycosylase; 1. DR FunFam; 3.20.190.10:FF:000001; Formamidopyrimidine-DNA glycosylase; 1. DR Gene3D; 1.10.8.50; -; 1. DR Gene3D; 3.20.190.10; MutM-like, N-terminal; 1. DR HAMAP; MF_00103; Fapy_DNA_glycosyl; 1. DR InterPro; IPR015887; DNA_glyclase_Znf_dom_DNA_BS. DR InterPro; IPR012319; FPG_cat. DR InterPro; IPR020629; FPG_Glyclase. DR InterPro; IPR035937; FPG_N. DR InterPro; IPR015886; H2TH_FPG. DR InterPro; IPR010979; Ribosomal_uS13-like_H2TH. DR InterPro; IPR000214; Znf_DNA_glyclase/AP_lyase. DR InterPro; IPR010663; Znf_FPG/IleRS. DR NCBIfam; TIGR00577; fpg; 1. DR NCBIfam; NF002211; PRK01103.1; 1. DR PANTHER; PTHR22993; FORMAMIDOPYRIMIDINE-DNA GLYCOSYLASE; 1. DR PANTHER; PTHR22993:SF9; FORMAMIDOPYRIMIDINE-DNA GLYCOSYLASE; 1. 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; SSF57716; Glucocorticoid receptor-like (DNA-binding domain); 1. DR SUPFAM; SSF81624; N-terminal domain of MutM-like DNA repair proteins; 1. DR SUPFAM; SSF46946; S13-like H2TH domain; 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..271 FT /note="Formamidopyrimidine-DNA glycosylase" FT /id="PRO_0000170828" FT ZN_FING 235..269 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 57 FT /note="Proton donor; for beta-elimination activity" FT /evidence="ECO:0000250" FT ACT_SITE 259 FT /note="Proton donor; for delta-elimination activity" FT /evidence="ECO:0000250" FT BINDING 90 FT /ligand="DNA" FT /ligand_id="ChEBI:CHEBI:16991" FT /evidence="ECO:0000250" FT BINDING 109 FT /ligand="DNA" FT /ligand_id="ChEBI:CHEBI:16991" FT /evidence="ECO:0000250" FT BINDING 150 FT /ligand="DNA" FT /ligand_id="ChEBI:CHEBI:16991" FT /evidence="ECO:0000250" SQ SEQUENCE 271 AA; 30772 MW; 571E67EF1D0978E1 CRC64; MPELPEVETA LRGISPYLKN FTIEKVVVRQ PKLRWAVSEE LITLKNVKIV DLTRRAKYLI IHTEKGYIIG HLGMSGSVRI VPQDSAIDKH DHIDIVVNNG KLLRYNDPRR FGAWLWTENL DDFHLFLKLG PEPLSDEFNA EYLFKKSRQK STALKTFLMD NAVVVGVGNI YTNESLFICG IHPLKLAKNL TRNQCFSLVN TIKDVLRKAI IQGGTTLKDF LQPDGRPGYF AQELLVYGNK DKPCPKCGGK IESLIIGQRN SFFCPKCQKR G //