ID   MTNA_LEPBA              Reviewed;         357 AA.
AC   B0SFD6;
DT   16-DEC-2008, integrated into UniProtKB/Swiss-Prot.
DT   08-APR-2008, sequence version 1.
DT   03-AUG-2022, entry version 77.
DE   RecName: Full=Methylthioribose-1-phosphate isomerase {ECO:0000255|HAMAP-Rule:MF_01678};
DE            Short=M1Pi {ECO:0000255|HAMAP-Rule:MF_01678};
DE            Short=MTR-1-P isomerase {ECO:0000255|HAMAP-Rule:MF_01678};
DE            EC=5.3.1.23 {ECO:0000255|HAMAP-Rule:MF_01678};
DE   AltName: Full=S-methyl-5-thioribose-1-phosphate isomerase {ECO:0000255|HAMAP-Rule:MF_01678};
GN   Name=mtnA {ECO:0000255|HAMAP-Rule:MF_01678}; OrderedLocusNames=LBF_2827;
OS   Leptospira biflexa serovar Patoc (strain Patoc 1 / Ames).
OC   Bacteria; Spirochaetes; Leptospirales; Leptospiraceae; Leptospira.
OX   NCBI_TaxID=355278;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=Patoc 1 / Ames;
RX   PubMed=18270594; DOI=10.1371/journal.pone.0001607;
RA   Picardeau M., Bulach D.M., Bouchier C., Zuerner R.L., Zidane N.,
RA   Wilson P.J., Creno S., Kuczek E.S., Bommezzadri S., Davis J.C., McGrath A.,
RA   Johnson M.J., Boursaux-Eude C., Seemann T., Rouy Z., Coppel R.L.,
RA   Rood J.I., Lajus A., Davies J.K., Medigue C., Adler B.;
RT   "Genome sequence of the saprophyte Leptospira biflexa provides insights
RT   into the evolution of Leptospira and the pathogenesis of leptospirosis.";
RL   PLoS ONE 3:E1607-E1607(2008).
CC   -!- FUNCTION: Catalyzes the interconversion of methylthioribose-1-phosphate
CC       (MTR-1-P) into methylthioribulose-1-phosphate (MTRu-1-P).
CC       {ECO:0000255|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:0000255|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:0000255|HAMAP-Rule:MF_01678}.
CC   -!- SIMILARITY: Belongs to the eIF-2B alpha/beta/delta subunits family.
CC       MtnA subfamily. {ECO:0000305}.
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DR   EMBL; CP000777; ABZ95304.1; -; Genomic_DNA.
DR   RefSeq; WP_012389853.1; NC_010842.1.
DR   AlphaFoldDB; B0SFD6; -.
DR   SMR; B0SFD6; -.
DR   KEGG; lbf:LBF_2827; -.
DR   HOGENOM; CLU_016218_1_2_12; -.
DR   OMA; RLWVDET; -.
DR   BioCyc; LBIF355278:LBF_RS14375-MON; -.
DR   UniPathway; UPA00904; UER00874.
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; -; 1.
DR   Gene3D; 3.40.50.10470; -; 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   InterPro; IPR001763; Rhodanese-like_dom.
DR   Pfam; PF01008; IF-2B; 1.
DR   SUPFAM; SSF100950; SSF100950; 1.
DR   TIGRFAMs; TIGR00524; eIF-2B_rel; 1.
DR   TIGRFAMs; TIGR00512; salvage_mtnA; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis; Isomerase; Methionine biosynthesis.
FT   CHAIN           1..357
FT                   /note="Methylthioribose-1-phosphate isomerase"
FT                   /id="PRO_0000357198"
FT   ACT_SITE        238
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01678"
FT   BINDING         49..51
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01678"
FT   BINDING         89
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01678"
FT   BINDING         197
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01678"
FT   BINDING         248..249
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01678"
FT   SITE            158
FT                   /note="Transition state stabilizer"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01678"
SQ   SEQUENCE   357 AA;  39723 MW;  D855F2486A876D35 CRC64;
     MSQPEFLPIQ WKSTFLSLLD QRVLPGKKEF LQIQTMEETI VAIREMAVRG APAIAITGIF
     GITLGAKKKS GNSNPVDVDS LIKQVFESRP TAVNLSFALK EAKKRVEGVS HWDSIAKVWE
     SYALEMMVQD LKANQTLGKN GADLFPKNQN EFHIITHCNT GALATAGHGT ALGVIRSLRD
     QGKKVVVYAD ETRPFLQGSR LTAFEMMEEG IECYIITDGM SGWLMNHRKI DAVLVGCDRV
     ATNGDTANKI GTYNLAIVAY EHKVPFYVCA TKDSFDLKLK TGDEIPIEMR KESEVTQFDF
     LKNEEGNFLF PEGKTSPIGA RALNPSFDIT KAKFIKNFIT ELGCFVPEEI SFRLKNV