MTAP_SYNY3
ID MTAP_SYNY3 Reviewed; 326 AA.
AC P0DJF8; P74469;
DT 21-MAR-2012, integrated into UniProtKB/Swiss-Prot.
DT 21-MAR-2012, sequence version 1.
DT 03-AUG-2022, entry version 54.
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=sll0135;
OS Synechocystis sp. (strain PCC 6803 / Kazusa).
OC Bacteria; Cyanobacteria; Synechococcales; Merismopediaceae; Synechocystis;
OC unclassified Synechocystis.
OX NCBI_TaxID=1111708;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=PCC 6803 / Kazusa;
RX PubMed=8905231; DOI=10.1093/dnares/3.3.109;
RA Kaneko T., Sato S., Kotani H., Tanaka A., Asamizu E., Nakamura Y.,
RA Miyajima N., Hirosawa M., Sugiura M., Sasamoto S., Kimura T., Hosouchi T.,
RA Matsuno A., Muraki A., Nakazaki N., Naruo K., Okumura S., Shimpo S.,
RA Takeuchi C., Wada T., Watanabe A., Yamada M., Yasuda M., Tabata S.;
RT "Sequence analysis of the genome of the unicellular cyanobacterium
RT Synechocystis sp. strain PCC6803. II. Sequence determination of the entire
RT genome and assignment of potential protein-coding regions.";
RL DNA Res. 3:109-136(1996).
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; BA000022; BAA18570.1; -; Genomic_DNA.
DR PIR; S76441; S76441.
DR AlphaFoldDB; P0DJF8; -.
DR SMR; P0DJF8; -.
DR IntAct; P0DJF8; 1.
DR STRING; 1148.1653658; -.
DR PaxDb; P0DJF8; -.
DR EnsemblBacteria; BAA18570; BAA18570; BAA18570.
DR KEGG; syn:sll0135; -.
DR eggNOG; COG0005; Bacteria.
DR InParanoid; P0DJF8; -.
DR OMA; ADPFCPE; -.
DR PhylomeDB; P0DJF8; -.
DR UniPathway; UPA00904; UER00873.
DR Proteomes; UP000001425; 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 PANTHER; PTHR42679; PTHR42679; 1.
DR Pfam; PF01048; PNP_UDP_1; 1.
DR SUPFAM; SSF53167; SSF53167; 1.
DR TIGRFAMs; TIGR01694; MTAP; 1.
PE 3: Inferred from homology;
KW Glycosyltransferase; Purine salvage; Reference proteome; Transferase.
FT CHAIN 1..326
FT /note="S-methyl-5'-thioadenosine phosphorylase"
FT /id="PRO_0000415100"
FT BINDING 44
FT /ligand="phosphate"
FT /ligand_id="ChEBI:CHEBI:43474"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01963"
FT BINDING 86..87
FT /ligand="phosphate"
FT /ligand_id="ChEBI:CHEBI:43474"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01963"
FT BINDING 119..120
FT /ligand="phosphate"
FT /ligand_id="ChEBI:CHEBI:43474"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01963"
FT BINDING 220
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01963"
FT BINDING 221
FT /ligand="phosphate"
FT /ligand_id="ChEBI:CHEBI:43474"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01963"
FT BINDING 244..246
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01963"
FT SITE 202
FT /note="Important for substrate specificity"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01963"
FT SITE 257
FT /note="Important for substrate specificity"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01963"
SQ SEQUENCE 326 AA; 35319 MW; 06F7D98E67A7BCD8 CRC64;
MGMIISMAMT AVTIWTKTKP GRVSCFIRKN STMVNAPIGI IGGSGLYQME ALKNVEEVTL
DTPFGAPSDS FIVGELAGVR VAFLARHGRG HHLLPSEIPF RANIHGMKQL GVKYLISASA
VGSLQAEAKP LDMVVPDQFI DRTRQRISTF FGEGIVAHIG FGNPICPQLA QCLSTAIAGL
ELEGVTLHDR GTYVSMEGPA FSTIAESNLY RSWGGTVIGM TNLPEAKLAR EAEIAYATLA
LVTDYDCWHP DHDHVTVEMV IGNLQKNAVN AQQVILETVK QLAANPFESI AHRALQYAVL
TPPDKFPAAT YEKLSLLLGK YYPPAP
