ID A0A2P1PP96_9GAMM Unreviewed; 341 AA.
AC A0A2P1PP96;
DT 23-MAY-2018, integrated into UniProtKB/TrEMBL.
DT 23-MAY-2018, sequence version 1.
DT 24-JAN-2024, entry version 20.
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:AVP96664.1};
GN ORFNames=C7S18_05355 {ECO:0000313|EMBL:AVP96664.1};
OS Ahniella affigens.
OC Bacteria; Pseudomonadota; Gammaproteobacteria; Xanthomonadales;
OC Rhodanobacteraceae; Ahniella.
OX NCBI_TaxID=2021234 {ECO:0000313|EMBL:AVP96664.1, ECO:0000313|Proteomes:UP000241074};
RN [1] {ECO:0000313|EMBL:AVP96664.1, ECO:0000313|Proteomes:UP000241074}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=D13 {ECO:0000313|EMBL:AVP96664.1,
RC ECO:0000313|Proteomes:UP000241074};
RA Ko Y., Kim J.-H.;
RT "Ahniella affigens gen. nov., sp. nov., a gammaproteobacterium isolated
RT from sandy soil near a stream.";
RL Submitted (MAR-2018) to the EMBL/GenBank/DDBJ databases.
RN [2] {ECO:0000313|EMBL:AVP96664.1, ECO:0000313|Proteomes:UP000241074}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=D13 {ECO:0000313|EMBL:AVP96664.1,
RC ECO:0000313|Proteomes:UP000241074};
RA Keele B.F.;
RL Submitted (MAR-2018) to the EMBL/GenBank/DDBJ databases.
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}.
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DR EMBL; CP027860; AVP96664.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A2P1PP96; -.
DR KEGG; xba:C7S18_05355; -.
DR OrthoDB; 9803436at2; -.
DR UniPathway; UPA00904; UER00874.
DR Proteomes; UP000241074; Chromosome.
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};
KW Reference proteome {ECO:0000313|Proteomes:UP000241074}.
FT ACT_SITE 240
FT /note="Proton donor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT BINDING 55..57
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT BINDING 98
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT BINDING 199
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT BINDING 250..251
FT /ligand="substrate"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
FT SITE 160
FT /note="Transition state stabilizer"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_01678"
SQ SEQUENCE 341 AA; 35818 MW; 344A59BA39C745A1 CRC64;
MQDVDYARYD RIRAVTWTGQ SLRLIDQRLL PMQQLWTTCS TAAEVAAAIQ NLTVRGAPAI
GISAAYGVVL AAQAAAGADG VVSAAALAEP IATLAASRPT AVNLFWALAR MQRVLGSAAS
VARLEEEAVA IEREDLAANR HMGQLGASLI AKGSGVLTHC NTGSLATAGF GTALGVIRAA
YAEGRVAAVF NTETRPWGQG TRLTAWELLE DGIPAKLIAD SAAAHLMKTG QVQWVIVGAD
RIARNGDTAN KIGTYQLAIA ARHHGVKFMV VAPSSTVDLS MASGEHIEIE LREARELLEA
GGQRIAANGV QTWNPVFDVT PGALIDAIIT EQGVFKAPFF A
//
