MTNA_ALKEH
ID MTNA_ALKEH Reviewed; 346 AA.
AC Q0AA70;
DT 16-DEC-2008, integrated into UniProtKB/Swiss-Prot.
DT 17-OCT-2006, sequence version 1.
DT 03-AUG-2022, entry version 89.
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=Mlg_0913;
OS Alkalilimnicola ehrlichii (strain ATCC BAA-1101 / DSM 17681 / MLHE-1).
OC Bacteria; Proteobacteria; Gammaproteobacteria; Chromatiales;
OC Ectothiorhodospiraceae; Alkalilimnicola.
OX NCBI_TaxID=187272;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC BAA-1101 / DSM 17681 / MLHE-1;
RA Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C.,
RA Glavina del Rio T., Hammon N., Israni S., Dalin E., Tice H., Pitluck S.,
RA Sims D., Brettin T., Bruce D., Han C., Tapia R., Gilna P., Schmutz J.,
RA Larimer F., Land M., Hauser L., Kyrpides N., Mikhailova N., Oremland R.S.,
RA Hoeft S.E., Switzer-Blum J., Kulp T., King G., Tabita R., Witte B.,
RA Santini J.M., Basu P., Hollibaugh J.T., Xie G., Stolz J.F., Richardson P.;
RT "Complete sequence of Alkalilimnicola ehrilichei MLHE-1.";
RL Submitted (AUG-2006) 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; CP000453; ABI56267.1; -; Genomic_DNA.
DR RefSeq; WP_011628662.1; NC_008340.1.
DR AlphaFoldDB; Q0AA70; -.
DR SMR; Q0AA70; -.
DR EnsemblBacteria; ABI56267; ABI56267; Mlg_0913.
DR KEGG; aeh:Mlg_0913; -.
DR eggNOG; COG0182; Bacteria.
DR HOGENOM; CLU_016218_1_2_6; -.
DR OMA; RLWVDET; -.
DR OrthoDB; 1290468at2; -.
DR UniPathway; UPA00904; UER00874.
DR Proteomes; UP000001962; 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..346
FT /note="Methylthioribose-1-phosphate isomerase"
FT /id="PRO_0000357134"
FT ACT_SITE 237
FT /note="Proton donor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01678"
FT BINDING 50..52
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 196
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01678"
FT BINDING 247..248
FT /ligand="substrate"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01678"
FT SITE 157
FT /note="Transition state stabilizer"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01678"
SQ SEQUENCE 346 AA; 36473 MW; 25B33798A0EE7E17 CRC64;
MPRNDTVRAL DWQGDHLKLL DQRRLPAETV WLDCHSAADT ADAIRDMVVR GAPAIGIAAA
YGVVLAARAA MARRPADWPA AMAADLARLR SARPTAVNLF WALDRMQQVV DSDPADPLAA
LEAAAVAIHE DDLTANRRMG ELGAHLIPAG AGVLTHCNTG SLATGGYGTA LGVIRSAWSG
KGLSAVYADE TRPWLQGARL TAWELVADGI PVRLIAEGAA PLLMQRGRVD WVIVGADRVA
ANGDTANKIG TYALALACKA HGVKFMVVAP SSTIDLDCPG GDRIPIEERP PEELLWLGDR
RVAAEGAGAW NPVFDVTPAE LIDVLVTERG VVTDFGGAGV RALING
