ID   CDD_SHEAM               Reviewed;         296 AA.
AC   A1S723;
DT   05-FEB-2008, integrated into UniProtKB/Swiss-Prot.
DT   06-FEB-2007, sequence version 1.
DT   27-MAR-2024, entry version 83.
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=Sama_1974;
OS   Shewanella amazonensis (strain ATCC BAA-1098 / SB2B).
OC   Bacteria; Pseudomonadota; Gammaproteobacteria; Alteromonadales;
OC   Shewanellaceae; Shewanella.
OX   NCBI_TaxID=326297;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC BAA-1098 / SB2B;
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C.,
RA   Glavina del Rio T., Hammon N., Israni S., Dalin E., Tice H., Pitluck S.,
RA   Munk A.C., Brettin T., Bruce D., Han C., Tapia R., Gilna P., Schmutz J.,
RA   Larimer F., Land M., Hauser L., Kyrpides N., Mikhailova N., Fredrickson J.,
RA   Richardson P.;
RT   "Complete sequence of Shewanella amazonensis SB2B.";
RL   Submitted (DEC-2006) 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; 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; CP000507; ABM00180.1; -; Genomic_DNA.
DR   RefSeq; WP_011760087.1; NC_008700.1.
DR   AlphaFoldDB; A1S723; -.
DR   SMR; A1S723; -.
DR   STRING; 326297.Sama_1974; -.
DR   KEGG; saz:Sama_1974; -.
DR   eggNOG; COG0295; Bacteria.
DR   HOGENOM; CLU_052424_0_0_6; -.
DR   OrthoDB; 9795347at2; -.
DR   Proteomes; UP000009175; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProt.
DR   GO; GO:0004126; F:cytidine deaminase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0047844; F:deoxycytidine deaminase activity; IEA:RHEA.
DR   GO; GO:0042802; F:identical protein binding; IEA:UniProt.
DR   GO; GO:0008270; F:zinc ion binding; IEA:UniProtKB-UniRule.
DR   CDD; cd01283; 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; IPR016193; Cytidine_deaminase-like.
DR   InterPro; IPR020797; Cytidine_deaminase_bacteria.
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; Reference proteome; Zinc.
FT   CHAIN           1..296
FT                   /note="Cytidine deaminase"
FT                   /id="PRO_1000068959"
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;  31802 MW;  BF1B6BF257D052F8 CRC64;
     MQDRFVRRIN ELPKALADEL LPMLGEQFCG HLDAQQVKQL CAVSAMDSHE LGLALLPIAA
     ALAKPPVSNF YVGAIAVGSG GDFYMGANLE LQGEALFHSV HAEQSAISHA WLSGETQISD
     IIVNASPCGH CRQFMNELVQ GQAIRIHLPG QDTAPLSHYL PYAFGPADLN VTAPLLSKQQ
     TELVLESDDP LLIEALDHAG LSYAPYSQCH AAVVLETEDG ASFCGRYAEN AAFNPSMLPM
     QMALSALVRH NRSFSDIKRA VLLESSQGKI SLVGATMDAL HAVAVVELEH LVVDPV
//