ID   MTAP_TUBMM              Reviewed;         309 AA.
AC   D5GFR0;
DT   25-JAN-2012, integrated into UniProtKB/Swiss-Prot.
DT   25-JAN-2012, sequence version 2.
DT   13-SEP-2023, entry version 55.
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=GSTUM_00007013001;
OS   Tuber melanosporum (strain Mel28) (Perigord black truffle).
OC   Eukaryota; Fungi; Dikarya; Ascomycota; Pezizomycotina; Pezizomycetes;
OC   Pezizales; Tuberaceae; Tuber.
OX   NCBI_TaxID=656061;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Mel28;
RX   PubMed=20348908; DOI=10.1038/nature08867;
RA   Martin F., Kohler A., Murat C., Balestrini R., Coutinho P.M., Jaillon O.,
RA   Montanini B., Morin E., Noel B., Percudani R., Porcel B., Rubini A.,
RA   Amicucci A., Amselem J., Anthouard V., Arcioni S., Artiguenave F.,
RA   Aury J.M., Ballario P., Bolchi A., Brenna A., Brun A., Buee M.,
RA   Cantarel B., Chevalier G., Couloux A., Da Silva C., Denoeud F.,
RA   Duplessis S., Ghignone S., Hilselberger B., Iotti M., Marcais B., Mello A.,
RA   Miranda M., Pacioni G., Quesneville H., Riccioni C., Ruotolo R.,
RA   Splivallo R., Stocchi V., Tisserant E., Viscomi A.R., Zambonelli A.,
RA   Zampieri E., Henrissat B., Lebrun M.H., Paolocci F., Bonfante P.,
RA   Ottonello S., Wincker P.;
RT   "Perigord black truffle genome uncovers evolutionary origins and mechanisms
RT   of symbiosis.";
RL   Nature 464:1033-1038(2010).
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}.
CC   -!- SEQUENCE CAUTION:
CC       Sequence=CAZ83353.1; Type=Erroneous initiation; Note=Extended N-terminus.; Evidence={ECO:0000305};
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DR   EMBL; FN430220; CAZ83353.1; ALT_INIT; Genomic_DNA.
DR   AlphaFoldDB; D5GFR0; -.
DR   SMR; D5GFR0; -.
DR   STRING; 656061.D5GFR0; -.
DR   eggNOG; KOG3985; Eukaryota.
DR   InParanoid; D5GFR0; -.
DR   OrthoDB; 168017at2759; -.
DR   UniPathway; UPA00904; UER00873.
DR   Proteomes; UP000006911; 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..309
FT                   /note="S-methyl-5'-thioadenosine phosphorylase"
FT                   /id="PRO_0000415136"
FT   BINDING         19
FT                   /ligand="phosphate"
FT                   /ligand_id="ChEBI:CHEBI:43474"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03155"
FT   BINDING         64..65
FT                   /ligand="phosphate"
FT                   /ligand_id="ChEBI:CHEBI:43474"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03155"
FT   BINDING         97..98
FT                   /ligand="phosphate"
FT                   /ligand_id="ChEBI:CHEBI:43474"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03155"
FT   BINDING         201
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03155"
FT   BINDING         202
FT                   /ligand="phosphate"
FT                   /ligand_id="ChEBI:CHEBI:43474"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03155"
FT   BINDING         225..227
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03155"
FT   SITE            183
FT                   /note="Important for substrate specificity"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03155"
FT   SITE            238
FT                   /note="Important for substrate specificity"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03155"
SQ   SEQUENCE   309 AA;  33148 MW;  0D3FA92C97BF9093 CRC64;
     MPLPDTFSES VRIAVIGGTG ISALEAEGFT AVASLDIQTP YGAPGSPLTI LKTPQNTPIA
     FLSRHGLHHE LTPTEIPNRA NIAALRSIGV RSIIAFSAVG SLQEHIRPRD FVVPSQIIDR
     TKGLRASTFF EGGLVGHVGF ADPFDSELSK VVFDIGSDGV LNGEGVKMHK DALLICMEGP
     QFSTRAESNL YRSWGGDVIN MSALPEAKLA KEAEIAYVMV CMSTDYDCWK TNEAAVTVET
     VMGNMHANGA NAKHLAAAIL KELAKEEHQD LVGAKHLEGL SKWACCTAPA GRKAEVVKKI
     EFMLPGYFS
//