ID   AC4CH_ECO7I             Reviewed;         103 AA.
AC   B7NHW2;
DT   14-APR-2009, integrated into UniProtKB/Swiss-Prot.
DT   24-MAR-2009, sequence version 1.
DT   25-MAY-2022, entry version 57.
DE   RecName: Full=N(4)-acetylcytidine amidohydrolase {ECO:0000255|HAMAP-Rule:MF_00684};
DE            Short=ac4C amidohydrolase {ECO:0000255|HAMAP-Rule:MF_00684};
DE            EC=3.5.1.135 {ECO:0000255|HAMAP-Rule:MF_00684};
GN   Name=yqfB; OrderedLocusNames=ECIAI39_3316;
OS   Escherichia coli O7:K1 (strain IAI39 / ExPEC).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Enterobacterales;
OC   Enterobacteriaceae; Escherichia.
OX   NCBI_TaxID=585057;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=IAI39 / ExPEC;
RX   PubMed=19165319; DOI=10.1371/journal.pgen.1000344;
RA   Touchon M., Hoede C., Tenaillon O., Barbe V., Baeriswyl S., Bidet P.,
RA   Bingen E., Bonacorsi S., Bouchier C., Bouvet O., Calteau A., Chiapello H.,
RA   Clermont O., Cruveiller S., Danchin A., Diard M., Dossat C., Karoui M.E.,
RA   Frapy E., Garry L., Ghigo J.M., Gilles A.M., Johnson J., Le Bouguenec C.,
RA   Lescat M., Mangenot S., Martinez-Jehanne V., Matic I., Nassif X., Oztas S.,
RA   Petit M.A., Pichon C., Rouy Z., Ruf C.S., Schneider D., Tourret J.,
RA   Vacherie B., Vallenet D., Medigue C., Rocha E.P.C., Denamur E.;
RT   "Organised genome dynamics in the Escherichia coli species results in
RT   highly diverse adaptive paths.";
RL   PLoS Genet. 5:E1000344-E1000344(2009).
CC   -!- FUNCTION: Catalyzes the hydrolysis of N(4)-acetylcytidine (ac4C).
CC       {ECO:0000255|HAMAP-Rule:MF_00684}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=H2O + N(4)-acetylcytidine = acetate + cytidine + H(+);
CC         Xref=Rhea:RHEA:62932, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:17562, ChEBI:CHEBI:30089, ChEBI:CHEBI:70989;
CC         EC=3.5.1.135; Evidence={ECO:0000255|HAMAP-Rule:MF_00684};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=H2O + N(4)-acetyl-2'-deoxycytidine = 2'-deoxycytidine +
CC         acetate + H(+); Xref=Rhea:RHEA:62936, ChEBI:CHEBI:15377,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:15698, ChEBI:CHEBI:30089,
CC         ChEBI:CHEBI:146133; EC=3.5.1.135; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_00684};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=H2O + N(4)-acetylcytosine = acetate + cytosine + H(+);
CC         Xref=Rhea:RHEA:62940, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:16040, ChEBI:CHEBI:30089, ChEBI:CHEBI:146134;
CC         EC=3.5.1.135; Evidence={ECO:0000255|HAMAP-Rule:MF_00684};
CC   -!- SIMILARITY: Belongs to the N(4)-acetylcytidine amidohydrolase family.
CC       {ECO:0000255|HAMAP-Rule:MF_00684}.
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DR   EMBL; CU928164; CAR19434.1; -; Genomic_DNA.
DR   RefSeq; WP_001182956.1; NC_011750.1.
DR   RefSeq; YP_002409238.1; NC_011750.1.
DR   AlphaFoldDB; B7NHW2; -.
DR   SMR; B7NHW2; -.
DR   STRING; 585057.ECIAI39_3316; -.
DR   EnsemblBacteria; CAR19434; CAR19434; ECIAI39_3316.
DR   KEGG; ect:ECIAI39_3316; -.
DR   PATRIC; fig|585057.6.peg.3440; -.
DR   HOGENOM; CLU_152586_0_0_6; -.
DR   OMA; HARQENM; -.
DR   Proteomes; UP000000749; Chromosome.
DR   GO; GO:0016813; F:hydrolase activity, acting on carbon-nitrogen (but not peptide) bonds, in linear amidines; IEA:UniProtKB-UniRule.
DR   GO; GO:0106251; F:N4-acetylcytidine amidohydrolase activity; IEA:RHEA.
DR   HAMAP; MF_00684; ac4C_amidohydr; 1.
DR   InterPro; IPR008314; AC4CH.
DR   InterPro; IPR007374; ASCH_domain.
DR   InterPro; IPR015947; PUA-like_sf.
DR   PANTHER; PTHR38088; PTHR38088; 1.
DR   Pfam; PF04266; ASCH; 1.
DR   PIRSF; PIRSF029143; UCP029143; 1.
DR   SMART; SM01022; ASCH; 1.
DR   SUPFAM; SSF88697; SSF88697; 1.
PE   3: Inferred from homology;
KW   Hydrolase.
FT   CHAIN           1..103
FT                   /note="N(4)-acetylcytidine amidohydrolase"
FT                   /id="PRO_1000131784"
FT   DOMAIN          6..101
FT                   /note="ASCH"
FT                   /evidence="ECO:0000255"
FT   ACT_SITE        21
FT                   /note="Proton acceptor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00684"
FT   ACT_SITE        24
FT                   /note="Nucleophile"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00684"
FT   ACT_SITE        74
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00684"
SQ   SEQUENCE   103 AA;  11963 MW;  BBC4E2AA8419F2CE CRC64;
     MQPNDITFFQ RFQDDILAGR KTITIRDESE SHFKTGDVLR VGRFEDDGYF CTIEVTATST
     VTLDTLTEKH AEQENMTLTE LKKVIADIYP DQTQFYVIEF KCL