ID   MTNA2_PSELT             Reviewed;         345 AA.
AC   A8F7V1;
DT   16-DEC-2008, integrated into UniProtKB/Swiss-Prot.
DT   13-NOV-2007, sequence version 1.
DT   03-AUG-2022, entry version 80.
DE   RecName: Full=Methylthioribose-1-phosphate isomerase 2 {ECO:0000255|HAMAP-Rule:MF_01678};
DE            Short=M1Pi 2 {ECO:0000255|HAMAP-Rule:MF_01678};
DE            Short=MTR-1-P isomerase 2 {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 2 {ECO:0000255|HAMAP-Rule:MF_01678};
GN   Name=mtnA2 {ECO:0000255|HAMAP-Rule:MF_01678}; OrderedLocusNames=Tlet_1681;
OS   Pseudothermotoga lettingae (strain ATCC BAA-301 / DSM 14385 / NBRC 107922 /
OS   TMO) (Thermotoga lettingae).
OC   Bacteria; Thermotogae; Thermotogales; Thermotogaceae; Pseudothermotoga.
OX   NCBI_TaxID=416591;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC BAA-301 / DSM 14385 / NBRC 107922 / TMO;
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., Foster B., Bruce D., Schmutz J., Larimer F., Land M.,
RA   Hauser L., Kyrpides N., Mikhailova N., Nelson K., Gogarten J.P., Noll K.,
RA   Richardson P.;
RT   "Complete sequence of Thermotoga lettingae TMO.";
RL   Submitted (AUG-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}.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; CP000812; ABV34235.1; -; Genomic_DNA.
DR   RefSeq; WP_012003711.1; NC_009828.1.
DR   AlphaFoldDB; A8F7V1; -.
DR   SMR; A8F7V1; -.
DR   STRING; 416591.Tlet_1681; -.
DR   EnsemblBacteria; ABV34235; ABV34235; Tlet_1681.
DR   KEGG; tle:Tlet_1681; -.
DR   eggNOG; COG0182; Bacteria.
DR   HOGENOM; CLU_016218_1_2_0; -.
DR   OMA; GDVIMTH; -.
DR   OrthoDB; 1290468at2; -.
DR   UniPathway; UPA00904; UER00874.
DR   Proteomes; UP000002016; 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..345
FT                   /note="Methylthioribose-1-phosphate isomerase 2"
FT                   /id="PRO_0000357261"
FT   ACT_SITE        235
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01678"
FT   BINDING         47..49
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01678"
FT   BINDING         88
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01678"
FT   BINDING         194
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01678"
FT   BINDING         245..246
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01678"
FT   SITE            155
FT                   /note="Transition state stabilizer"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01678"
SQ   SEQUENCE   345 AA;  38250 MW;  9F128C3DF03F895E CRC64;
     MSTFRSIEWK KDKLVLLDQR YLPEKTLYLE LKTVDEVARA IKEMTVRGAP AIGVAAAYGM
     VLCVQKLSKN DDLIRELQKA DDLLRASRPT AVNLFWALDR MKKIWQGFNG SLEDLKMILE
     KEATDIERED VEINKQIAKN GVELVPFGAK IIHHCNTGSL ATVDYGTALG VIRYAHEIGK
     KIHVFLDETR PRLQGARLSA WEMKELGIPH TIIVDGASGL VMKKFKIDLA LVGADRIAAN
     GDTANKIGTY NLAIVAKYHN VPLYVVAPTS TIDLKTPAGQ DIPIEERSAD EIRCVGNSQV
     APQESPVFNP AFDVTPAELI SGIITEKGIV YPPFKENLRK LFESA