MTNA_LACTC
ID MTNA_LACTC Reviewed; 417 AA.
AC C5DHL1;
DT 30-NOV-2010, integrated into UniProtKB/Swiss-Prot.
DT 28-JUL-2009, sequence version 1.
DT 25-MAY-2022, entry version 63.
DE RecName: Full=Methylthioribose-1-phosphate isomerase {ECO:0000255|HAMAP-Rule:MF_03119};
DE Short=M1Pi {ECO:0000255|HAMAP-Rule:MF_03119};
DE Short=MTR-1-P isomerase {ECO:0000255|HAMAP-Rule:MF_03119};
DE EC=5.3.1.23 {ECO:0000255|HAMAP-Rule:MF_03119};
DE AltName: Full=S-methyl-5-thioribose-1-phosphate isomerase {ECO:0000255|HAMAP-Rule:MF_03119};
DE AltName: Full=Translation initiation factor eIF-2B subunit alpha/beta/delta-like protein {ECO:0000255|HAMAP-Rule:MF_03119};
GN Name=MRI1 {ECO:0000255|HAMAP-Rule:MF_03119};
GN OrderedLocusNames=KLTH0E05236g;
OS Lachancea thermotolerans (strain ATCC 56472 / CBS 6340 / NRRL Y-8284)
OS (Yeast) (Kluyveromyces thermotolerans).
OC Eukaryota; Fungi; Dikarya; Ascomycota; Saccharomycotina; Saccharomycetes;
OC Saccharomycetales; Saccharomycetaceae; Lachancea.
OX NCBI_TaxID=559295;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC 56472 / CBS 6340 / NRRL Y-8284;
RX PubMed=19525356; DOI=10.1101/gr.091546.109;
RG The Genolevures Consortium;
RA Souciet J.-L., Dujon B., Gaillardin C., Johnston M., Baret P.V.,
RA Cliften P., Sherman D.J., Weissenbach J., Westhof E., Wincker P., Jubin C.,
RA Poulain J., Barbe V., Segurens B., Artiguenave F., Anthouard V.,
RA Vacherie B., Val M.-E., Fulton R.S., Minx P., Wilson R., Durrens P.,
RA Jean G., Marck C., Martin T., Nikolski M., Rolland T., Seret M.-L.,
RA Casaregola S., Despons L., Fairhead C., Fischer G., Lafontaine I., Leh V.,
RA Lemaire M., de Montigny J., Neuveglise C., Thierry A., Blanc-Lenfle I.,
RA Bleykasten C., Diffels J., Fritsch E., Frangeul L., Goeffon A.,
RA Jauniaux N., Kachouri-Lafond R., Payen C., Potier S., Pribylova L.,
RA Ozanne C., Richard G.-F., Sacerdot C., Straub M.-L., Talla E.;
RT "Comparative genomics of protoploid Saccharomycetaceae.";
RL Genome Res. 19:1696-1709(2009).
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_03119}.
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_03119};
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_03119}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_03119}.
CC Nucleus {ECO:0000255|HAMAP-Rule:MF_03119}.
CC -!- SIMILARITY: Belongs to the eIF-2B alpha/beta/delta subunits family.
CC MtnA subfamily. {ECO:0000255|HAMAP-Rule:MF_03119}.
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DR EMBL; CU928169; CAR23272.1; -; Genomic_DNA.
DR RefSeq; XP_002553709.1; XM_002553663.1.
DR AlphaFoldDB; C5DHL1; -.
DR SMR; C5DHL1; -.
DR STRING; 559295.C5DHL1; -.
DR EnsemblFungi; CAR23272; CAR23272; KLTH0E05236g.
DR GeneID; 8291861; -.
DR KEGG; lth:KLTH0E05236g; -.
DR eggNOG; KOG1468; Eukaryota.
DR HOGENOM; CLU_016218_1_3_1; -.
DR InParanoid; C5DHL1; -.
DR OMA; RLWVDET; -.
DR OrthoDB; 1410886at2759; -.
DR UniPathway; UPA00904; UER00874.
DR Proteomes; UP000002036; Chromosome E.
DR GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR GO; GO:0005634; C:nucleus; IEA:UniProtKB-SubCell.
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.
PE 3: Inferred from homology;
KW Amino-acid biosynthesis; Cytoplasm; Isomerase; Methionine biosynthesis;
KW Nucleus; Reference proteome.
FT CHAIN 1..417
FT /note="Methylthioribose-1-phosphate isomerase"
FT /id="PRO_0000402031"
FT ACT_SITE 285
FT /note="Proton donor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03119"
FT SITE 181
FT /note="Transition state stabilizer"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03119"
SQ SEQUENCE 417 AA; 45195 MW; 66B0C2D63056DFB1 CRC64;
MSLEAIQFDR SHRDDISVRV LDQLLLPYTT KYVPIYTIDD GYTVINTMQV RGAPAIAIVG
ALAVLMEIQL LQNDGFARTQ TFYDISSFEL TRSALSQRLD FLLSSRPTAV NLSNALREIR
VLLAQSAGLA AFGNGVYDFV CRLIDEDLTN NVKMGDNGAA FLLDALQQEG FDEDFAVLTI
CNTGSLATSG YGTALGVVRS LWNDSLAKSQ APGDGSAKKR KLNQGRAKMV QVYPLETRPY
NQGARLTAYE LVHDQIPATL IPDSSIAYRI ATSPVPIKAA FVGADRIVRN GDTANKIGTY
QLALVCKHFG IKFFVTAPKT TIDSKTETGA GIVVEERKPN EFKHVSGTLI DSQTGLPCVD
NQDKPVSASV GVAPSEIDVW NPAFDITPHE LIDGIVTEDG VFTKSASGSF DLTNLFA
