ID A0A1G0WB85_9BACT Unreviewed; 333 AA.
AC A0A1G0WB85;
DT 15-FEB-2017, integrated into UniProtKB/TrEMBL.
DT 15-FEB-2017, sequence version 1.
DT 24-JAN-2024, entry version 23.
DE RecName: Full=Methylthioribose-1-phosphate isomerase {ECO:0000256|HAMAP-Rule:MF_01678};
DE Short=M1Pi {ECO:0000256|HAMAP-Rule:MF_01678};
DE Short=MTR-1-P isomerase {ECO:0000256|HAMAP-Rule:MF_01678};
DE EC=5.3.1.23 {ECO:0000256|HAMAP-Rule:MF_01678};
DE AltName: Full=S-methyl-5-thioribose-1-phosphate isomerase {ECO:0000256|HAMAP-Rule:MF_01678};
GN Name=mtnA {ECO:0000256|HAMAP-Rule:MF_01678,
GN ECO:0000313|EMBL:OGV18673.1};
GN ORFNames=A2X47_07280 {ECO:0000313|EMBL:OGV18673.1};
OS Lentisphaerae bacterium GWF2_38_69.
OC Bacteria; Lentisphaerota.
OX NCBI_TaxID=1798570 {ECO:0000313|EMBL:OGV18673.1, ECO:0000313|Proteomes:UP000176746};
RN [1] {ECO:0000313|EMBL:OGV18673.1, ECO:0000313|Proteomes:UP000176746}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RX PubMed=27774985; DOI=10.1038/ncomms13219;
RA Anantharaman K., Brown C.T., Hug L.A., Sharon I., Castelle C.J.,
RA Probst A.J., Thomas B.C., Singh A., Wilkins M.J., Karaoz U., Brodie E.L.,
RA Williams K.H., Hubbard S.S., Banfield J.F.;
RT "Thousands of microbial genomes shed light on interconnected biogeochemical
RT processes in an aquifer system.";
RL Nat. Commun. 7:13219-13219(2016).
CC -!- FUNCTION: Catalyzes the interconversion of methylthioribose-1-phosphate
CC (MTR-1-P) into methylthioribulose-1-phosphate (MTRu-1-P).
CC {ECO:0000256|HAMAP-Rule:MF_01678}.
CC -!- CATALYTIC ACTIVITY:
CC Reaction=S-methyl-5-thio-alpha-D-ribose 1-phosphate = S-methyl-5-thio-
CC D-ribulose 1-phosphate; Xref=Rhea:RHEA:19989, ChEBI:CHEBI:58533,
CC ChEBI:CHEBI:58548; EC=5.3.1.23; Evidence={ECO:0000256|HAMAP-
CC Rule:MF_01678};
CC -!- PATHWAY: Amino-acid biosynthesis; L-methionine biosynthesis via salvage
CC pathway; L-methionine from S-methyl-5-thio-alpha-D-ribose 1-phosphate:
CC step 1/6. {ECO:0000256|HAMAP-Rule:MF_01678}.
CC -!- SIMILARITY: Belongs to the EIF-2B alpha/beta/delta subunits family.
CC MtnA subfamily. {ECO:0000256|HAMAP-Rule:MF_01678}.
CC -!- CAUTION: The sequence shown here is derived from an EMBL/GenBank/DDBJ
CC whole genome shotgun (WGS) entry which is preliminary data.
CC {ECO:0000313|EMBL:OGV18673.1}.
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DR EMBL; MHBE01000044; OGV18673.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A1G0WB85; -.
DR STRING; 1798570.A2X47_07280; -.
DR UniPathway; UPA00904; UER00874.
DR Proteomes; UP000176746; Unassembled WGS sequence.
DR GO; GO:0046523; F:S-methyl-5-thioribose-1-phosphate isomerase activity; IEA:UniProtKB-UniRule.
DR GO; GO:0019509; P:L-methionine salvage from methylthioadenosine; IEA:UniProtKB-UniPathway.
DR GO; GO:0019284; P:L-methionine salvage from S-adenosylmethionine; IEA:UniProtKB-UniRule.
DR Gene3D; 1.20.120.420; translation initiation factor eif-2b, domain 1; 1.
DR HAMAP; MF_01678; Salvage_MtnA; 1.
DR InterPro; IPR000649; IF-2B-related.
DR InterPro; IPR005251; IF-M1Pi.
DR InterPro; IPR042529; IF_2B-like_C.
DR InterPro; IPR011559; Initiation_fac_2B_a/b/d.
DR InterPro; IPR027363; M1Pi_N.
DR InterPro; IPR037171; NagB/RpiA_transferase-like.
DR NCBIfam; TIGR00524; eIF-2B_rel; 1.
DR NCBIfam; TIGR00512; salvage_mtnA; 1.
DR PANTHER; PTHR43475; METHYLTHIORIBOSE-1-PHOSPHATE ISOMERASE; 1.
DR PANTHER; PTHR43475:SF1; METHYLTHIORIBOSE-1-PHOSPHATE ISOMERASE; 1.
DR Pfam; PF01008; IF-2B; 1.
DR SUPFAM; SSF100950; NagB/RpiA/CoA transferase-like; 1.
PE 3: Inferred from homology;
KW Amino-acid biosynthesis {ECO:0000256|HAMAP-Rule:MF_01678};
KW Isomerase {ECO:0000256|ARBA:ARBA00023235, ECO:0000256|HAMAP-Rule:MF_01678};
KW Methionine biosynthesis {ECO:0000256|HAMAP-Rule:MF_01678}.
FT ACT_SITE 223
FT /note="Proton donor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT BINDING 32..34
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT BINDING 75
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT BINDING 182
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT BINDING 233..234
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT SITE 143
FT /note="Transition state stabilizer"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
SQ SEQUENCE 333 AA; 36412 MW; FA92BE6A0E3528C4 CRC64;
MIDQTRLPNE LTYIETDQAE EIYDAIKRLV VRGAPAIGCA AALGLGAVLQ NSKASNRKDF
VAELKRTSDY FSSSRPTAVN LFWALNRCVS KILESSEENI KRLKLILVNE GISILEEDIQ
MCRSIGEHGL SLIKDGFGIL THCNAGALAT GDFGTALSPI YLAHEKGLKV KVYSDETRPL
LQGSRLTAWE LHRAGIDVTT ICDNMAAQVM KEKKINLVIT GADRIAANGD SANKIGTYGV
AILAKYHDIP FYIAAPSSTI DMKTKEGSAI PIEQRNGDEI RKINNKYSAP EKVNVYNPAF
DVVPNDLISG IITEKGILRK PFLTSIENSL NNS
//