ID   MTAP_AJECG              Reviewed;         313 AA.
AC   C0NRX4;
DT   25-JAN-2012, integrated into UniProtKB/Swiss-Prot.
DT   05-MAY-2009, sequence version 1.
DT   24-JAN-2024, entry version 58.
DE   RecName: Full=S-methyl-5'-thioadenosine phosphorylase {ECO:0000255|HAMAP-Rule:MF_03155};
DE            EC=2.4.2.28 {ECO:0000255|HAMAP-Rule:MF_03155};
DE   AltName: Full=5'-methylthioadenosine phosphorylase {ECO:0000255|HAMAP-Rule:MF_03155};
DE            Short=MTA phosphorylase {ECO:0000255|HAMAP-Rule:MF_03155};
DE            Short=MTAP {ECO:0000255|HAMAP-Rule:MF_03155};
DE            Short=MTAPase {ECO:0000255|HAMAP-Rule:MF_03155};
GN   ORFNames=HCBG_05904;
OS   Ajellomyces capsulatus (strain G186AR / H82 / ATCC MYA-2454 / RMSCC 2432)
OS   (Darling's disease fungus) (Histoplasma capsulatum).
OC   Eukaryota; Fungi; Dikarya; Ascomycota; Pezizomycotina; Eurotiomycetes;
OC   Eurotiomycetidae; Onygenales; Ajellomycetaceae; Histoplasma.
OX   NCBI_TaxID=447093;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=G186AR / H82 / ATCC MYA-2454 / RMSCC 2432;
RA   Champion M., Cuomo C.A., Ma L.-J., Henn M.R., Sil A., Goldman B.,
RA   Young S.K., Kodira C.D., Zeng Q., Koehrsen M., Alvarado L., Berlin A.,
RA   Borenstein D., Chen Z., Engels R., Freedman E., Gellesch M., Goldberg J.,
RA   Griggs A., Gujja S., Heiman D., Hepburn T., Howarth C., Jen D., Larson L.,
RA   Lewis B., Mehta T., Park D., Pearson M., Roberts A., Saif S., Shea T.,
RA   Shenoy N., Sisk P., Stolte C., Sykes S., Walk T., White J., Yandava C.,
RA   Klein B., McEwen J.G., Puccia R., Goldman G.H., Felipe M.S., Nino-Vega G.,
RA   San-Blas G., Taylor J., Mendoza L., Galagan J.E., Nusbaum C., Birren B.W.;
RT   "The genome sequence of Ajellomyces capsulatus strain G186AR.";
RL   Submitted (FEB-2009) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Catalyzes the reversible phosphorylation of S-methyl-5'-
CC       thioadenosine (MTA) to adenine and 5-methylthioribose-1-phosphate.
CC       Involved in the breakdown of MTA, a major by-product of polyamine
CC       biosynthesis. Responsible for the first step in the methionine salvage
CC       pathway after MTA has been generated from S-adenosylmethionine. Has
CC       broad substrate specificity with 6-aminopurine nucleosides as preferred
CC       substrates. {ECO:0000255|HAMAP-Rule:MF_03155}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=phosphate + S-methyl-5'-thioadenosine = adenine + S-methyl-5-
CC         thio-alpha-D-ribose 1-phosphate; Xref=Rhea:RHEA:11852,
CC         ChEBI:CHEBI:16708, ChEBI:CHEBI:17509, ChEBI:CHEBI:43474,
CC         ChEBI:CHEBI:58533; EC=2.4.2.28; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_03155};
CC   -!- PATHWAY: Amino-acid biosynthesis; L-methionine biosynthesis via salvage
CC       pathway; S-methyl-5-thio-alpha-D-ribose 1-phosphate from S-methyl-5'-
CC       thioadenosine (phosphorylase route): step 1/1. {ECO:0000255|HAMAP-
CC       Rule:MF_03155}.
CC   -!- SUBUNIT: Homotrimer. {ECO:0000255|HAMAP-Rule:MF_03155}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_03155}.
CC       Nucleus {ECO:0000255|HAMAP-Rule:MF_03155}.
CC   -!- SIMILARITY: Belongs to the PNP/MTAP phosphorylase family. MTAP
CC       subfamily. {ECO:0000255|HAMAP-Rule:MF_03155}.
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DR   EMBL; GG663370; EEH05640.1; -; Genomic_DNA.
DR   AlphaFoldDB; C0NRX4; -.
DR   SMR; C0NRX4; -.
DR   STRING; 447093.C0NRX4; -.
DR   VEuPathDB; FungiDB:I7I50_06159; -.
DR   HOGENOM; CLU_054456_0_1_1; -.
DR   InParanoid; C0NRX4; -.
DR   OrthoDB; 168017at2759; -.
DR   UniPathway; UPA00904; UER00873.
DR   Proteomes; UP000001631; Unassembled WGS sequence.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0005634; C:nucleus; IEA:UniProtKB-SubCell.
DR   GO; GO:0017061; F:S-methyl-5-thioadenosine phosphorylase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0019509; P:L-methionine salvage from methylthioadenosine; IEA:UniProtKB-UniRule.
DR   GO; GO:0006166; P:purine ribonucleoside salvage; IEA:UniProtKB-KW.
DR   CDD; cd09010; MTAP_SsMTAPII_like_MTIP; 1.
DR   Gene3D; 3.40.50.1580; Nucleoside phosphorylase domain; 1.
DR   HAMAP; MF_01963; MTAP; 1.
DR   InterPro; IPR010044; MTAP.
DR   InterPro; IPR000845; Nucleoside_phosphorylase_d.
DR   InterPro; IPR035994; Nucleoside_phosphorylase_sf.
DR   InterPro; IPR018099; Purine_phosphorylase-2_CS.
DR   NCBIfam; TIGR01694; MTAP; 1.
DR   PANTHER; PTHR42679; S-METHYL-5'-THIOADENOSINE PHOSPHORYLASE; 1.
DR   PANTHER; PTHR42679:SF2; S-METHYL-5'-THIOADENOSINE PHOSPHORYLASE; 1.
DR   Pfam; PF01048; PNP_UDP_1; 1.
DR   SUPFAM; SSF53167; Purine and uridine phosphorylases; 1.
DR   PROSITE; PS01240; PNP_MTAP_2; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Glycosyltransferase; Nucleus; Purine salvage;
KW   Reference proteome; Transferase.
FT   CHAIN           1..313
FT                   /note="S-methyl-5'-thioadenosine phosphorylase"
FT                   /id="PRO_0000415123"
FT   BINDING         20
FT                   /ligand="phosphate"
FT                   /ligand_id="ChEBI:CHEBI:43474"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03155"
FT   BINDING         68..69
FT                   /ligand="phosphate"
FT                   /ligand_id="ChEBI:CHEBI:43474"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03155"
FT   BINDING         101..102
FT                   /ligand="phosphate"
FT                   /ligand_id="ChEBI:CHEBI:43474"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03155"
FT   BINDING         203
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03155"
FT   BINDING         204
FT                   /ligand="phosphate"
FT                   /ligand_id="ChEBI:CHEBI:43474"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03155"
FT   BINDING         227..229
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03155"
FT   SITE            185
FT                   /note="Important for substrate specificity"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03155"
FT   SITE            240
FT                   /note="Important for substrate specificity"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03155"
SQ   SEQUENCE   313 AA;  34036 MW;  CAE309E63FE7494B CRC64;
     MAALRDTYND PVHIAVIGGT GLRELPHFTQ VASLNITTPW GPPSSPITIL HHTCSTSGKV
     VPVAFLSRHG LHHEYAPHEV PARANIAALR SIGVRSIVAF SAVGSLQEAI KPRDFVVPDQ
     VIDRTKGVRP WTFFEGGAVA HVGFADPFDE QMAKVVRACG HSLEGDGVVL HDRGTLICME
     GPQFSTRAES NLYRSWGGSI INMSCIPEAK LAREAEIAYQ MICMSTDYDC WHSEAADVTV
     DMVMANMKMN SVNARNFIGA VLDELTKDEH AALVQAKHLE GTCKFGLSTS PGYLSAEALT
     KLSWLFPGYF SNN
//