ID   MTNA_ZYGRC              Reviewed;         414 AA.
AC   C5DU12;
DT   30-NOV-2010, integrated into UniProtKB/Swiss-Prot.
DT   28-JUL-2009, sequence version 1.
DT   25-MAY-2022, entry version 64.
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=ZYRO0C12936g;
OS   Zygosaccharomyces rouxii (strain ATCC 2623 / CBS 732 / NBRC 1130 / NCYC 568
OS   / NRRL Y-229) (Candida mogii).
OC   Eukaryota; Fungi; Dikarya; Ascomycota; Saccharomycotina; Saccharomycetes;
OC   Saccharomycetales; Saccharomycetaceae; Zygosaccharomyces.
OX   NCBI_TaxID=559307;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 2623 / CBS 732 / BCRC 21506 / NBRC 1130 / NCYC 568 / NRRL
RC   Y-229;
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; CU928175; CAR27273.1; -; Genomic_DNA.
DR   RefSeq; XP_002496206.1; XM_002496161.1.
DR   AlphaFoldDB; C5DU12; -.
DR   SMR; C5DU12; -.
DR   STRING; 559307.C5DU12; -.
DR   EnsemblFungi; CAR27273; CAR27273; ZYRO0C12936g.
DR   GeneID; 8203426; -.
DR   KEGG; zro:ZYRO0C12936g; -.
DR   HOGENOM; CLU_016218_1_3_1; -.
DR   InParanoid; C5DU12; -.
DR   UniPathway; UPA00904; UER00874.
DR   Proteomes; UP000008536; Chromosome C.
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..414
FT                   /note="Methylthioribose-1-phosphate isomerase"
FT                   /id="PRO_0000402060"
FT   REGION          205..224
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   ACT_SITE        283
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   414 AA;  45731 MW;  9B2655B9A4CAA020 CRC64;
     MSLEAIKFDR SEPRKVSVKV LDQLLLPYTT KYIPVHTIDD GYRVIKNMQV RGAPAIAIVG
     SLSILTEVQF LQLDSQKSTQ WFYDLSDWSN VNSKLLQRIE FLLSSRPTAV NLSNSLTEIR
     GILQNSSDLS DFDSKLFQYV CTLIDDDLAN NITMGNNGAE YLLESLVQDG FQGEFGVLTI
     CNTGSLATSG YGTALGVIRS LWAKSQSQGS ENPPSKKQKK DAAPTKMVQV FPLETRPYNQ
     GSRLTAYELV HDEIPATLIT DSMVSYKIKT SPIPIKAAFV GADRIVRNGD TANKIGTFQL
     AIVCKQFGIK FFVVAPKTTI DNVTPSGDQI VVEERKPSEF RLVTGTAVDY VNESPILNDS
     QEPQSAKVGI APPNVNVWNP AFDITPHEFI DGIVTEKGVF TKDDKGNFQL DKLF