ID   CDD_SERP5               Reviewed;         294 AA.
AC   A8GC32;
DT   05-FEB-2008, integrated into UniProtKB/Swiss-Prot.
DT   13-NOV-2007, sequence version 1.
DT   02-SEP-2026, entry version 93.
DE   RecName: Full=Cytidine deaminase {ECO:0000255|HAMAP-Rule:MF_01558};
DE            EC=3.5.4.5 {ECO:0000255|HAMAP-Rule:MF_01558};
DE   AltName: Full=Cytidine aminohydrolase {ECO:0000255|HAMAP-Rule:MF_01558};
DE            Short=CDA {ECO:0000255|HAMAP-Rule:MF_01558};
GN   Name=cdd {ECO:0000255|HAMAP-Rule:MF_01558};
GN   OrderedLocusNames=Spro_1568;
OS   Serratia proteamaculans (strain 568).
OC   Bacteria; Pseudomonadati; Pseudomonadota; Gammaproteobacteria;
OC   Enterobacterales; Yersiniaceae; Serratia.
OX   NCBI_TaxID=399741;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=568;
RX   PubMed=19060168; DOI=10.1128/aem.02239-08;
RA   Taghavi S., Garafola C., Monchy S., Newman L., Hoffman A., Weyens N.,
RA   Barac T., Vangronsveld J., van der Lelie D.;
RT   "Genome survey and characterization of endophytic bacteria exhibiting a
RT   beneficial effect on growth and development of poplar trees.";
RL   Appl. Environ. Microbiol. 75:748-757(2009).
CC   -!- FUNCTION: This enzyme scavenges exogenous and endogenous cytidine and
CC       2'-deoxycytidine for UMP synthesis. {ECO:0000255|HAMAP-Rule:MF_01558}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=cytidine + H2O + H(+) = uridine + NH4(+);
CC         Xref=Rhea:RHEA:16069, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:16704, ChEBI:CHEBI:17562, ChEBI:CHEBI:28938; EC=3.5.4.5;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01558};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=2'-deoxycytidine + H2O + H(+) = 2'-deoxyuridine + NH4(+);
CC         Xref=Rhea:RHEA:13433, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:15698, ChEBI:CHEBI:16450, ChEBI:CHEBI:28938; EC=3.5.4.5;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01558};
CC   -!- COFACTOR:
CC       Name=Zn(2+); Xref=ChEBI:CHEBI:29105; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01558};
CC       Note=Binds 1 zinc ion. {ECO:0000255|HAMAP-Rule:MF_01558};
CC   -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_01558}.
CC   -!- SIMILARITY: Belongs to the cytidine and deoxycytidylate deaminase
CC       family. {ECO:0000255|HAMAP-Rule:MF_01558}.
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DR   EMBL; CP000826; ABV40672.1; -; Genomic_DNA.
DR   AlphaFoldDB; A8GC32; -.
DR   SMR; A8GC32; -.
DR   STRING; 399741.Spro_1568; -.
DR   PaxDb; 399741-Spro_1568; -.
DR   KEGG; spe:Spro_1568; -.
DR   eggNOG; COG0295; Bacteria.
DR   HOGENOM; CLU_052424_0_0_6; -.
DR   OrthoDB; 9795347at2; -.
DR   GO; GO:0005829; C:cytosol; IEA:TreeGrafter.
DR   GO; GO:0004126; F:cytidine deaminase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0042803; F:protein homodimerization activity; IEA:UniProtKB-ARBA.
DR   GO; GO:0008270; F:zinc ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0046135; P:pyrimidine nucleoside catabolic process; IEA:UniProtKB-ARBA.
DR   CDD; cd01283; cytidine_deaminase; 2.
DR   FunFam; 3.40.140.10:FF:000006; Cytidine deaminase; 1.
DR   FunFam; 3.40.140.10:FF:000007; Cytidine deaminase; 1.
DR   Gene3D; 3.40.140.10; Cytidine Deaminase, domain 2; 2.
DR   HAMAP; MF_01558; Cyt_deam; 1.
DR   InterPro; IPR016192; APOBEC/CMP_deaminase_Zn-bd.
DR   InterPro; IPR002125; CMP_dCMP_dom.
DR   InterPro; IPR013171; Cyd/dCyd_deaminase_Zn-bd.
DR   InterPro; IPR050202; Cyt/Deoxycyt_deaminase.
DR   InterPro; IPR006263; Cyt_deam_dimer.
DR   InterPro; IPR016193; Cytidine_deaminase-like.
DR   InterPro; IPR020797; Cytidine_deaminase_bacteria.
DR   NCBIfam; TIGR01355; cyt_deam_dimer; 1.
DR   NCBIfam; NF006537; PRK09027.1; 1.
DR   PANTHER; PTHR11644; CYTIDINE DEAMINASE; 1.
DR   PANTHER; PTHR11644:SF2; CYTIDINE DEAMINASE; 1.
DR   Pfam; PF00383; dCMP_cyt_deam_1; 1.
DR   Pfam; PF08211; dCMP_cyt_deam_2; 1.
DR   PIRSF; PIRSF006334; Cdd_plus_pseudo; 1.
DR   SUPFAM; SSF53927; Cytidine deaminase-like; 2.
DR   PROSITE; PS00903; CYT_DCMP_DEAMINASES_1; 1.
DR   PROSITE; PS51747; CYT_DCMP_DEAMINASES_2; 2.
PE   3: Inferred from homology;
KW   Hydrolase; Metal-binding; Zinc.
FT   CHAIN           1..294
FT                   /note="Cytidine deaminase"
FT                   /id="PRO_1000068958"
FT   DOMAIN          48..168
FT                   /note="CMP/dCMP-type deaminase 1"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01083"
FT   DOMAIN          187..294
FT                   /note="CMP/dCMP-type deaminase 2"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01083"
FT   ACT_SITE        104
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01558"
FT   BINDING         89..91
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01558"
FT   BINDING         102
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="catalytic"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01558"
FT   BINDING         129
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="catalytic"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01558"
FT   BINDING         132
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="catalytic"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01558"
SQ   SEQUENCE   294 AA;  31458 MW;  5B39F777114A759C CRC64;
     MHPRFQTAFG ELPATLQSAL QSYIDAPDFP AMLKAEQVDA ITQRCGLDDD ALAFALLPLA
     AACSLAPISQ FYVGAIARGQ SGNLYFGANM EFSGAPMQQT IHAEQCAVTH AWLRGEPALA
     SITVNYTPCG HCRQFMNELN SGVSLKIRLP GREPATLGDY LPDSFGPKDL DITTLLMDQV
     DHGFQLALTD ELEKAALAAA NQSHAPYSNA HSGVALEAED GTVYTGRYAE NAAFNPSLPP
     LQAALILMNV SGDDCQKVKR AVLAEPESAI LTQWDATRAT LAALGCQNVS RITF
//