MTAP_CHLAA
ID MTAP_CHLAA Reviewed; 288 AA.
AC A9WAL0;
DT 25-JAN-2012, integrated into UniProtKB/Swiss-Prot.
DT 05-FEB-2008, sequence version 1.
DT 03-AUG-2022, entry version 70.
DE RecName: Full=S-methyl-5'-thioadenosine phosphorylase {ECO:0000255|HAMAP-Rule:MF_01963};
DE EC=2.4.2.28 {ECO:0000255|HAMAP-Rule:MF_01963};
DE AltName: Full=5'-methylthioadenosine phosphorylase {ECO:0000255|HAMAP-Rule:MF_01963};
DE Short=MTA phosphorylase {ECO:0000255|HAMAP-Rule:MF_01963};
DE Short=MTAP {ECO:0000255|HAMAP-Rule:MF_01963};
GN Name=mtnP {ECO:0000255|HAMAP-Rule:MF_01963}; OrderedLocusNames=Caur_3616;
OS Chloroflexus aurantiacus (strain ATCC 29366 / DSM 635 / J-10-fl).
OC Bacteria; Chloroflexi; Chloroflexia; Chloroflexales; Chloroflexineae;
OC Chloroflexaceae; Chloroflexus.
OX NCBI_TaxID=324602;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 29366 / DSM 635 / J-10-fl;
RX PubMed=21714912; DOI=10.1186/1471-2164-12-334;
RA Tang K.H., Barry K., Chertkov O., Dalin E., Han C.S., Hauser L.J.,
RA Honchak B.M., Karbach L.E., Land M.L., Lapidus A., Larimer F.W.,
RA Mikhailova N., Pitluck S., Pierson B.K., Blankenship R.E.;
RT "Complete genome sequence of the filamentous anoxygenic phototrophic
RT bacterium Chloroflexus aurantiacus.";
RL BMC Genomics 12:334-334(2011).
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_01963}.
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_01963};
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_01963}.
CC -!- SUBUNIT: Homohexamer. Dimer of a homotrimer. {ECO:0000255|HAMAP-
CC Rule:MF_01963}.
CC -!- SIMILARITY: Belongs to the PNP/MTAP phosphorylase family. MTAP
CC subfamily. {ECO:0000255|HAMAP-Rule:MF_01963}.
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DR EMBL; CP000909; ABY36800.1; -; Genomic_DNA.
DR RefSeq; WP_012259453.1; NC_010175.1.
DR RefSeq; YP_001637189.1; NC_010175.1.
DR AlphaFoldDB; A9WAL0; -.
DR SMR; A9WAL0; -.
DR STRING; 324602.Caur_3616; -.
DR EnsemblBacteria; ABY36800; ABY36800; Caur_3616.
DR KEGG; cau:Caur_3616; -.
DR PATRIC; fig|324602.8.peg.4071; -.
DR eggNOG; COG0005; Bacteria.
DR HOGENOM; CLU_054456_0_2_0; -.
DR InParanoid; A9WAL0; -.
DR OMA; ADPFCPE; -.
DR UniPathway; UPA00904; UER00873.
DR Proteomes; UP000002008; Chromosome.
DR GO; GO:0005829; C:cytosol; IBA:GO_Central.
DR GO; GO:0017061; F:S-methyl-5-thioadenosine phosphorylase activity; IBA:GO_Central.
DR GO; GO:0019509; P:L-methionine salvage from methylthioadenosine; IBA:GO_Central.
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; -; 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 PANTHER; PTHR42679; PTHR42679; 1.
DR Pfam; PF01048; PNP_UDP_1; 1.
DR SUPFAM; SSF53167; SSF53167; 1.
DR TIGRFAMs; TIGR01694; MTAP; 1.
DR PROSITE; PS01240; PNP_MTAP_2; 1.
PE 3: Inferred from homology;
KW Glycosyltransferase; Purine salvage; Reference proteome; Transferase.
FT CHAIN 1..288
FT /note="S-methyl-5'-thioadenosine phosphorylase"
FT /id="PRO_0000415091"
FT BINDING 12
FT /ligand="phosphate"
FT /ligand_id="ChEBI:CHEBI:43474"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01963"
FT BINDING 54..55
FT /ligand="phosphate"
FT /ligand_id="ChEBI:CHEBI:43474"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01963"
FT BINDING 87..88
FT /ligand="phosphate"
FT /ligand_id="ChEBI:CHEBI:43474"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01963"
FT BINDING 186
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01963"
FT BINDING 187
FT /ligand="phosphate"
FT /ligand_id="ChEBI:CHEBI:43474"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01963"
FT BINDING 210..212
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01963"
FT SITE 168
FT /note="Important for substrate specificity"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01963"
FT SITE 223
FT /note="Important for substrate specificity"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01963"
SQ SEQUENCE 288 AA; 31271 MW; 114F997E0A557003 CRC64;
MHSATIGVIG GSGLYAMPDL KNPEEVRLTT PFGDPSDAFI IGELEGRRVA FLPRHGRGHR
LNPSEVPARA NIYAFKLLGV RALISVSAVG SLREDYAPGH AVIPDQIFDR TKGIRPATFF
EGGVVAHVAF DRPFCPYLSN ILLHAAQAAG AVVHQGGTLV VMEGPQFSTK AESEENRRRG
HSLIGMTALP EAKLAREAEI AYATLAMVTD YDVWHPEHDA VTAEQVIKVL SANVNLSQQI
VRHAVAQIDE NFTSPAHDAL RYAIVTHPDH IPAAVKERLA PIAGRYWS
