ID   MTNA_FERNB              Reviewed;         350 AA.
AC   A7HN79;
DT   16-DEC-2008, integrated into UniProtKB/Swiss-Prot.
DT   11-SEP-2007, sequence version 1.
DT   03-AUG-2022, entry version 82.
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=Fnod_1519;
OS   Fervidobacterium nodosum (strain ATCC 35602 / DSM 5306 / Rt17-B1).
OC   Bacteria; Thermotogae; Thermotogales; Fervidobacteriaceae;
OC   Fervidobacterium.
OX   NCBI_TaxID=381764;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 35602 / DSM 5306 / Rt17-B1;
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Barry K., Glavina del Rio T., Dalin E.,
RA   Tice H., Pitluck S., Saunders E., Brettin T., Bruce D., Detter J.C.,
RA   Han C., Schmutz J., Larimer F., Land M., Hauser L., Kyrpides N.,
RA   Mikhailova N., Nelson K., Gogarten J.P., Noll K., Richardson P.;
RT   "Complete sequence of Fervidobacterium nodosum Rt17-B1.";
RL   Submitted (JUL-2007) 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: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; CP000771; ABS61362.1; -; Genomic_DNA.
DR   RefSeq; WP_011994667.1; NC_009718.1.
DR   AlphaFoldDB; A7HN79; -.
DR   SMR; A7HN79; -.
DR   STRING; 381764.Fnod_1519; -.
DR   EnsemblBacteria; ABS61362; ABS61362; Fnod_1519.
DR   KEGG; fno:Fnod_1519; -.
DR   eggNOG; COG0182; Bacteria.
DR   HOGENOM; CLU_016218_1_2_0; -.
DR   OMA; RLWVDET; -.
DR   OrthoDB; 1290468at2; -.
DR   UniPathway; UPA00904; UER00874.
DR   Proteomes; UP000002415; 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; -; 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   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;
KW   Reference proteome.
FT   CHAIN           1..350
FT                   /note="Methylthioribose-1-phosphate isomerase"
FT                   /id="PRO_0000357184"
FT   ACT_SITE        239
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01678"
FT   BINDING         48..50
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01678"
FT   BINDING         93
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01678"
FT   BINDING         198
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01678"
FT   BINDING         249..250
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01678"
FT   SITE            159
FT                   /note="Transition state stabilizer"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01678"
SQ   SEQUENCE   350 AA;  38690 MW;  1314D992DE6D8B06 CRC64;
     MKLKTMTMEW TGDSLILIDQ RRLPFEEVYV TCADYRAVAL SIKEMVVRGA PAIGATAAFG
     YVLGAKEILK KSHNYEQVVM QMKNVKETLA KTRPTAVNLF WALERMEKRL IRHGKYEGLV
     KVLEDEALKI AKEDIEVNKA IGRNGAQLLQ DGFTVLTHCN AGALATVDYG TALGVLRAAK
     EQGKKIKVYA DETRPYLQGA RLTAWELMKD GFDVTLISDN MAGWVMKQGK INAVIVGADR
     IAANGDVANK IGTYMVAVLA NRHGIPFYVA APLSTIDMSI KSGKEIPIEE RSHEEVLTCG
     GKRVAPNNVN VYNPAFDVTD HELVTAIITE KGVVYPPYEE NIKKLFEEGI