ID   CDD_SHEHH               Reviewed;         296 AA.
AC   B0TQV3;
DT   20-MAY-2008, integrated into UniProtKB/Swiss-Prot.
DT   08-APR-2008, sequence version 1.
DT   03-AUG-2022, entry version 69.
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}; OrderedLocusNames=Shal_1783;
OS   Shewanella halifaxensis (strain HAW-EB4).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Alteromonadales;
OC   Shewanellaceae; Shewanella.
OX   NCBI_TaxID=458817;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=HAW-EB4;
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Glavina del Rio T., Dalin E., Tice H.,
RA   Bruce D., Goodwin L., Pitluck S., Sims D., Brettin T., Detter J.C., Han C.,
RA   Kuske C.R., Schmutz J., Larimer F., Land M., Hauser L., Kyrpides N.,
RA   Kim E., Zhao J.-S., Richardson P.;
RT   "Complete sequence of Shewanella halifaxensis HAW-EB4.";
RL   Submitted (JAN-2008) to the EMBL/GenBank/DDBJ databases.
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 + H(+) + H2O = NH4(+) + uridine;
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 + H(+) + H2O = 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;
CC         Evidence={ECO:0000255|HAMAP-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; CP000931; ABZ76348.1; -; Genomic_DNA.
DR   RefSeq; WP_012276882.1; NC_010334.1.
DR   AlphaFoldDB; B0TQV3; -.
DR   SMR; B0TQV3; -.
DR   STRING; 458817.Shal_1783; -.
DR   EnsemblBacteria; ABZ76348; ABZ76348; Shal_1783.
DR   KEGG; shl:Shal_1783; -.
DR   eggNOG; COG0295; Bacteria.
DR   HOGENOM; CLU_052424_0_0_6; -.
DR   OMA; NYSPCGH; -.
DR   OrthoDB; 959039at2; -.
DR   Proteomes; UP000001317; Chromosome.
DR   GO; GO:0004126; F:cytidine deaminase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0047844; F:deoxycytidine deaminase activity; IEA:RHEA.
DR   GO; GO:0008270; F:zinc ion binding; IEA:UniProtKB-UniRule.
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; IPR016193; Cytidine_deaminase-like.
DR   InterPro; IPR020797; Cytidine_deaminase_bacteria.
DR   Pfam; PF00383; dCMP_cyt_deam_1; 1.
DR   Pfam; PF08211; dCMP_cyt_deam_2; 1.
DR   SUPFAM; SSF53927; SSF53927; 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..296
FT                   /note="Cytidine deaminase"
FT                   /id="PRO_1000087798"
FT   DOMAIN          47..167
FT                   /note="CMP/dCMP-type deaminase 1"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01083"
FT   DOMAIN          186..296
FT                   /note="CMP/dCMP-type deaminase 2"
FT                   /evidence="ECO:0000255|PROSITE-ProRule:PRU01083"
FT   ACT_SITE        103
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01558"
FT   BINDING         88..90
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01558"
FT   BINDING         101
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="catalytic"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01558"
FT   BINDING         128
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="catalytic"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01558"
FT   BINDING         131
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="catalytic"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01558"
SQ   SEQUENCE   296 AA;  32144 MW;  BB0514870EB1ACBC CRC64;
     MQDRFLKSIA KLPEPLATAI VPLLDKDFAG HIDAQQLEVL QIASKMELNE LLLALLPIAA
     ALARPPISEF HVGAIAKGKS GDIYMGANIE LPGEALFHSV HAEQSAISHA WLSGESIIED
     IIVNASPCGH CRQFINELVD GSKVKIHLPA QKIEPLAHYL PYAFGPSDLN ITEPLLTKQQ
     HTLTLDSNDP MIIEALDHAG LSYAPYTKNY ASVVLETKDG ATYCGRYAEN AAFNPSMQPM
     QMALSTMARH NRDFSEINRA VLIESSKGVI SLVGAAMDAL HSVAVVELEH IVVEPE