ID   MTAD_NATPD              Reviewed;         431 AA.
AC   Q3ITF7;
DT   04-DEC-2007, integrated into UniProtKB/Swiss-Prot.
DT   08-NOV-2005, sequence version 1.
DT   03-AUG-2022, entry version 95.
DE   RecName: Full=5-methylthioadenosine/S-adenosylhomocysteine deaminase {ECO:0000255|HAMAP-Rule:MF_01281};
DE            Short=MTA/SAH deaminase {ECO:0000255|HAMAP-Rule:MF_01281};
DE            EC=3.5.4.28 {ECO:0000255|HAMAP-Rule:MF_01281};
DE            EC=3.5.4.31 {ECO:0000255|HAMAP-Rule:MF_01281};
GN   Name=mtaD {ECO:0000255|HAMAP-Rule:MF_01281}; OrderedLocusNames=NP_0972A;
OS   Natronomonas pharaonis (strain ATCC 35678 / DSM 2160 / CIP 103997 / JCM
OS   8858 / NBRC 14720 / NCIMB 2260 / Gabara) (Halobacterium pharaonis).
OC   Archaea; Euryarchaeota; Stenosarchaea group; Halobacteria; Halobacteriales;
OC   Haloarculaceae; Natronomonas.
OX   NCBI_TaxID=348780;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 35678 / DSM 2160 / CIP 103997 / JCM 8858 / NBRC 14720 / NCIMB
RC   2260 / Gabara;
RX   PubMed=16169924; DOI=10.1101/gr.3952905;
RA   Falb M., Pfeiffer F., Palm P., Rodewald K., Hickmann V., Tittor J.,
RA   Oesterhelt D.;
RT   "Living with two extremes: conclusions from the genome sequence of
RT   Natronomonas pharaonis.";
RL   Genome Res. 15:1336-1343(2005).
CC   -!- FUNCTION: Catalyzes the deamination of 5-methylthioadenosine and S-
CC       adenosyl-L-homocysteine into 5-methylthioinosine and S-inosyl-L-
CC       homocysteine, respectively. Is also able to deaminate adenosine.
CC       {ECO:0000255|HAMAP-Rule:MF_01281}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=H(+) + H2O + S-adenosyl-L-homocysteine = NH4(+) + S-inosyl-L-
CC         homocysteine; Xref=Rhea:RHEA:20716, ChEBI:CHEBI:15377,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:28938, ChEBI:CHEBI:57856,
CC         ChEBI:CHEBI:57985; EC=3.5.4.28; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01281};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=H(+) + H2O + S-methyl-5'-thioadenosine = NH4(+) + S-methyl-5'-
CC         thioinosine; Xref=Rhea:RHEA:25025, ChEBI:CHEBI:15377,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:17509, ChEBI:CHEBI:28938,
CC         ChEBI:CHEBI:48595; EC=3.5.4.31; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01281};
CC   -!- COFACTOR:
CC       Name=Zn(2+); Xref=ChEBI:CHEBI:29105;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01281};
CC       Note=Binds 1 zinc ion per subunit. {ECO:0000255|HAMAP-Rule:MF_01281};
CC   -!- SIMILARITY: Belongs to the metallo-dependent hydrolases superfamily.
CC       MTA/SAH deaminase family. {ECO:0000255|HAMAP-Rule:MF_01281}.
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DR   EMBL; CR936257; CAI48577.1; -; Genomic_DNA.
DR   RefSeq; WP_011322212.1; NC_007426.1.
DR   AlphaFoldDB; Q3ITF7; -.
DR   SMR; Q3ITF7; -.
DR   STRING; 348780.NP_0972A; -.
DR   PRIDE; Q3ITF7; -.
DR   EnsemblBacteria; CAI48577; CAI48577; NP_0972A.
DR   GeneID; 3702786; -.
DR   KEGG; nph:NP_0972A; -.
DR   eggNOG; arCOG00695; Archaea.
DR   HOGENOM; CLU_012358_2_1_2; -.
DR   OMA; FCPVERL; -.
DR   OrthoDB; 40873at2157; -.
DR   Proteomes; UP000002698; Chromosome.
DR   GO; GO:0090614; F:5'-methylthioadenosine deaminase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0050270; F:S-adenosylhomocysteine deaminase activity; IEA:UniProtKB-UniRule.
DR   Gene3D; 2.30.40.10; -; 1.
DR   HAMAP; MF_01281; MTA_SAH_deamin; 1.
DR   InterPro; IPR006680; Amidohydro-rel.
DR   InterPro; IPR023512; Deaminase_MtaD/DadD.
DR   InterPro; IPR011059; Metal-dep_hydrolase_composite.
DR   InterPro; IPR032466; Metal_Hydrolase.
DR   Pfam; PF01979; Amidohydro_1; 1.
DR   SUPFAM; SSF51338; SSF51338; 2.
DR   SUPFAM; SSF51556; SSF51556; 1.
PE   3: Inferred from homology;
KW   Hydrolase; Metal-binding; Reference proteome; Zinc.
FT   CHAIN           1..431
FT                   /note="5-methylthioadenosine/S-adenosylhomocysteine
FT                   deaminase"
FT                   /id="PRO_0000312484"
FT   BINDING         60
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01281"
FT   BINDING         62
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01281"
FT   BINDING         89
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01281"
FT   BINDING         182
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01281"
FT   BINDING         209
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01281"
FT   BINDING         212
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01281"
FT   BINDING         297
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01281"
FT   BINDING         297
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01281"
SQ   SEQUENCE   431 AA;  45106 MW;  C0F5F31585720A0D CRC64;
     MSTLQITGGQ VLTPELTVRT ADVLADSETG EILAVGDTAA GDRTLDAEGC LVVPGLVNTH
     CHAAMTLLRG YADDKPLDRW LQEDIWPVEA ELTPEDIRAG TRLGLVELLK NGVTAVGDMY
     FEVPEVAAAV EEAGIRARLG HGIVTVGKDE ADARADFEEG LAVARELDGA ADGRVRTALM
     PHSLTTADPD LIAEFVPRAR DAGVPIHYHA NETTDEVDPI VDERGVRPLE FADELGLLDE
     GDFIAHGVHV DETEIELLAE RGVGVAHCPA SNMKLASGIA PVQEFLDAGV TVGIGTDGPA
     SNNDLDVVDE MRDAAMVGKL GADDAAAVAA PDIVNAATAG GAETLGFDAG RVEAGALADL
     AIVDLDAPHL TPSHDLVSHL AYAVRGSDVR HTVVGGEVIV EDREVRTLDA GAVKREAERH
     AAELVSRAEG D