ID A0A285D3S1_9RHOB Unreviewed; 290 AA.
AC A0A285D3S1;
DT 22-NOV-2017, integrated into UniProtKB/TrEMBL.
DT 22-NOV-2017, sequence version 1.
DT 24-JAN-2024, entry version 18.
DE RecName: Full=S-methyl-5'-thioadenosine phosphorylase {ECO:0000256|HAMAP-Rule:MF_01963};
DE EC=2.4.2.28 {ECO:0000256|HAMAP-Rule:MF_01963};
DE AltName: Full=5'-methylthioadenosine phosphorylase {ECO:0000256|HAMAP-Rule:MF_01963};
DE Short=MTA phosphorylase {ECO:0000256|HAMAP-Rule:MF_01963};
DE Short=MTAP {ECO:0000256|HAMAP-Rule:MF_01963};
GN Name=mtnP {ECO:0000256|HAMAP-Rule:MF_01963};
GN ORFNames=SAMN05878503_11812 {ECO:0000313|EMBL:SNX73938.1};
OS Cereibacter ovatus.
OC Bacteria; Pseudomonadota; Alphaproteobacteria; Rhodobacterales;
OC Paracoccaceae; Cereibacter.
OX NCBI_TaxID=439529 {ECO:0000313|EMBL:SNX73938.1, ECO:0000313|Proteomes:UP000219467};
RN [1] {ECO:0000313|Proteomes:UP000219467}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=JA234 {ECO:0000313|Proteomes:UP000219467};
RA Varghese N., Submissions S.;
RL Submitted (AUG-2017) 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:0000256|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:0000256|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:0000256|HAMAP-
CC Rule:MF_01963}.
CC -!- SUBUNIT: Homohexamer. Dimer of a homotrimer. {ECO:0000256|HAMAP-
CC Rule:MF_01963}.
CC -!- SIMILARITY: Belongs to the PNP/MTAP phosphorylase family. MTAP
CC subfamily. {ECO:0000256|HAMAP-Rule:MF_01963}.
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DR EMBL; OAOQ01000018; SNX73938.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A285D3S1; -.
DR OrthoDB; 1523230at2; -.
DR UniPathway; UPA00904; UER00873.
DR Proteomes; UP000219467; Unassembled WGS sequence.
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 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.
PE 3: Inferred from homology;
KW Glycosyltransferase {ECO:0000256|HAMAP-Rule:MF_01963};
KW Purine salvage {ECO:0000256|HAMAP-Rule:MF_01963};
KW Reference proteome {ECO:0000313|Proteomes:UP000219467};
KW Transferase {ECO:0000256|HAMAP-Rule:MF_01963}.
FT DOMAIN 5..240
FT /note="Nucleoside phosphorylase"
FT /evidence="ECO:0000259|Pfam:PF01048"
FT BINDING 11
FT /ligand="phosphate"
FT /ligand_id="ChEBI:CHEBI:43474"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01963"
FT BINDING 53..54
FT /ligand="phosphate"
FT /ligand_id="ChEBI:CHEBI:43474"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01963"
FT BINDING 86..87
FT /ligand="phosphate"
FT /ligand_id="ChEBI:CHEBI:43474"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01963"
FT BINDING 184
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01963"
FT BINDING 185
FT /ligand="phosphate"
FT /ligand_id="ChEBI:CHEBI:43474"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01963"
FT BINDING 208..210
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01963"
FT SITE 166
FT /note="Important for substrate specificity"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01963"
FT SITE 221
FT /note="Important for substrate specificity"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01963"
SQ SEQUENCE 290 AA; 30947 MW; 768B3F07E0852681 CRC64;
MQTMIGVIGG SGVYEIDGLQ DAVWTKVETP WGTPSDEILV GKLDGVAMAF LPRHGRGHVH
SPTSVPYRAN IDALKRLGVT DVVSVSACGS LREEMAPGDF VIVDQFIDRS FAREKSFFGT
GCVAHVALGK PTCPRLSAAC ADAARATGVT VHDSGTYLCM EGPQFSTLAE SLLYKSWGCH
VIGMTNMPEA KLAREAELCY ASVAMVTDYD CWHPHHDEVD ISAIIATLTG NAQHARNLVA
GLPQRLGAER APCPHGCDRA LDHAIMTAPA KRDPELLAKL DAVAGRVLKG
//
