ID   ADE_HAHCH               Reviewed;         334 AA.
AC   Q2SLW3;
DT   15-JAN-2008, integrated into UniProtKB/Swiss-Prot.
DT   24-JAN-2006, sequence version 1.
DT   04-NOV-2026, entry version 101.
DE   RecName: Full=Adenine deaminase {ECO:0000255|HAMAP-Rule:MF_01962};
DE            Short=ADE {ECO:0000255|HAMAP-Rule:MF_01962};
DE            EC=3.5.4.2 {ECO:0000255|HAMAP-Rule:MF_01962};
DE   AltName: Full=Adenine aminohydrolase {ECO:0000255|HAMAP-Rule:MF_01962};
DE            Short=AAH {ECO:0000255|HAMAP-Rule:MF_01962};
GN   OrderedLocusNames=HCH_01503;
OS   Hahella chejuensis (strain KCTC 2396).
OC   Bacteria; Pseudomonadati; Pseudomonadota; Gammaproteobacteria;
OC   Oceanospirillales; Hahellaceae; Hahella.
OX   NCBI_TaxID=349521;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=KCTC 2396;
RX   PubMed=16352867; DOI=10.1093/nar/gki1016;
RA   Jeong H., Yim J.H., Lee C., Choi S.-H., Park Y.K., Yoon S.H., Hur C.-G.,
RA   Kang H.-Y., Kim D., Lee H.H., Park K.H., Park S.-H., Park H.-S., Lee H.K.,
RA   Oh T.K., Kim J.F.;
RT   "Genomic blueprint of Hahella chejuensis, a marine microbe producing an
RT   algicidal agent.";
RL   Nucleic Acids Res. 33:7066-7073(2005).
CC   -!- FUNCTION: Catalyzes the hydrolytic deamination of adenine to
CC       hypoxanthine. Plays an important role in the purine salvage pathway and
CC       in nitrogen catabolism. {ECO:0000255|HAMAP-Rule:MF_01962}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=adenine + H2O + H(+) = hypoxanthine + NH4(+);
CC         Xref=Rhea:RHEA:23688, ChEBI:CHEBI:15377, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:16708, ChEBI:CHEBI:17368, ChEBI:CHEBI:28938; EC=3.5.4.2;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01962};
CC   -!- COFACTOR:
CC       Name=Zn(2+); Xref=ChEBI:CHEBI:29105; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01962};
CC       Note=Binds 1 zinc ion per subunit. {ECO:0000255|HAMAP-Rule:MF_01962};
CC   -!- SIMILARITY: Belongs to the metallo-dependent hydrolases superfamily.
CC       Adenosine and AMP deaminases family. Adenine deaminase type 2
CC       subfamily. {ECO:0000255|HAMAP-Rule:MF_01962}.
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DR   EMBL; CP000155; ABC28361.1; -; Genomic_DNA.
DR   RefSeq; WP_011395434.1; NC_007645.1.
DR   AlphaFoldDB; Q2SLW3; -.
DR   SMR; Q2SLW3; -.
DR   STRING; 349521.HCH_01503; -.
DR   KEGG; hch:HCH_01503; -.
DR   eggNOG; COG1816; Bacteria.
DR   HOGENOM; CLU_039228_7_0_6; -.
DR   OMA; AAFCTDQ; -.
DR   OrthoDB; 105475at2; -.
DR   Proteomes; UP000000238; Chromosome.
DR   GO; GO:0005829; C:cytosol; IEA:TreeGrafter.
DR   GO; GO:0000034; F:adenine deaminase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0008270; F:zinc ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0006146; P:adenine catabolic process; IEA:UniProtKB-UniRule.
DR   GO; GO:0043103; P:hypoxanthine salvage; IEA:UniProtKB-UniRule.
DR   CDD; cd01320; ADA; 1.
DR   FunFam; 3.20.20.140:FF:000039; Adenine deaminase; 1.
DR   Gene3D; 3.20.20.140; Metal-dependent hydrolases; 1.
DR   HAMAP; MF_01962; Adenine_deaminase; 1.
DR   InterPro; IPR001365; A_deaminase_dom.
DR   InterPro; IPR028892; ADE.
DR   InterPro; IPR006330; Ado/ade_deaminase.
DR   InterPro; IPR032466; Metal_Hydrolase.
DR   NCBIfam; TIGR01430; aden_deam; 1.
DR   NCBIfam; NF006850; PRK09358.1-6; 1.
DR   PANTHER; PTHR43114; ADENINE DEAMINASE; 1.
DR   PANTHER; PTHR43114:SF6; ADENINE DEAMINASE; 1.
DR   Pfam; PF00962; A_deaminase; 1.
DR   SUPFAM; SSF51556; Metallo-dependent hydrolases; 1.
PE   3: Inferred from homology;
KW   Hydrolase; Metal-binding; Nucleotide metabolism; Reference proteome; Zinc.
FT   CHAIN           1..334
FT                   /note="Adenine deaminase"
FT                   /id="PRO_1000017663"
FT   ACT_SITE        197
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01962"
FT   BINDING         14
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="catalytic"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01962"
FT   BINDING         16
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="catalytic"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01962"
FT   BINDING         194
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="catalytic"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01962"
FT   BINDING         275
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /ligand_note="catalytic"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01962"
FT   BINDING         276
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01962"
FT   SITE            218
FT                   /note="Important for catalytic activity"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01962"
SQ   SEQUENCE   334 AA;  38111 MW;  C4379DD26145913A CRC64;
     MQDFLKGLPK AELHLHIEGS LEPELMFEIG RRNGVALPFA NVEEVRAAYE FNNLQEFLDI
     YYQGAQVLLH EQDFYDMTFA YLQRCREQNV IHAEMFFDPQ THTDRGVDIG VVIRGLTRAM
     EDAEIQWGQS SKLILCFLRH LSEDAAIETL RQALPYKQHF VGVGLDSSEV GHPPEKFQRV
     FEQAQNAGLL TVAHAGEEGP PEYIWQALDL LKVKRIDHGV RCIEDAALMQ RLIDEQIPLT
     VCPLSNIKLC VFDSMSEHNI LRLLEKGLKV TVNSDDPAYF GGYMNENFIA MQEALPMSKE
     QAAQLARNSF EASFLTSEEK ARLLARLDQY LQNH
//