ID   MTNA_AJECG              Reviewed;         392 AA.
AC   C0P108;
DT   30-NOV-2010, integrated into UniProtKB/Swiss-Prot.
DT   05-MAY-2009, sequence version 1.
DT   25-MAY-2022, entry version 47.
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}; ORFNames=HCBG_09088;
OS   Ajellomyces capsulatus (strain G186AR / H82 / ATCC MYA-2454 / RMSCC 2432)
OS   (Darling's disease fungus) (Histoplasma capsulatum).
OC   Eukaryota; Fungi; Dikarya; Ascomycota; Pezizomycotina; Eurotiomycetes;
OC   Eurotiomycetidae; Onygenales; Ajellomycetaceae; Histoplasma.
OX   NCBI_TaxID=447093;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=G186AR / H82 / ATCC MYA-2454 / RMSCC 2432;
RA   Champion M., Cuomo C.A., Ma L.-J., Henn M.R., Sil A., Goldman B.,
RA   Young S.K., Kodira C.D., Zeng Q., Koehrsen M., Alvarado L., Berlin A.,
RA   Borenstein D., Chen Z., Engels R., Freedman E., Gellesch M., Goldberg J.,
RA   Griggs A., Gujja S., Heiman D., Hepburn T., Howarth C., Jen D., Larson L.,
RA   Lewis B., Mehta T., Park D., Pearson M., Roberts A., Saif S., Shea T.,
RA   Shenoy N., Sisk P., Stolte C., Sykes S., Walk T., White J., Yandava C.,
RA   Klein B., McEwen J.G., Puccia R., Goldman G.H., Felipe M.S., Nino-Vega G.,
RA   San-Blas G., Taylor J., Mendoza L., Galagan J.E., Nusbaum C., Birren B.W.;
RT   "The genome sequence of Ajellomyces capsulatus strain G186AR.";
RL   Submitted (FEB-2009) 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_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; GG663383; EEH02644.1; -; Genomic_DNA.
DR   AlphaFoldDB; C0P108; -.
DR   SMR; C0P108; -.
DR   STRING; 447093.C0P108; -.
DR   EnsemblFungi; EEH02644; EEH02644; HCBG_09088.
DR   VEuPathDB; FungiDB:HCBG_09088; -.
DR   HOGENOM; CLU_016218_1_3_1; -.
DR   InParanoid; C0P108; -.
DR   OrthoDB; 1410886at2759; -.
DR   UniPathway; UPA00904; UER00874.
DR   Proteomes; UP000001631; Unassembled WGS sequence.
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.
DR   TIGRFAMs; TIGR00512; salvage_mtnA; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis; Cytoplasm; Isomerase; Methionine biosynthesis;
KW   Nucleus; Reference proteome.
FT   CHAIN           1..392
FT                   /note="Methylthioribose-1-phosphate isomerase"
FT                   /id="PRO_0000402007"
FT   ACT_SITE        268
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03119"
FT   SITE            180
FT                   /note="Transition state stabilizer"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03119"
SQ   SEQUENCE   392 AA;  41357 MW;  DFF72055624DDC9B CRC64;
     MTLVAITYTR GSLHILNQLL LPHQTTYDPL HSARDAWHAI HEMRVRGAPA IAIVAALSLA
     VELHTLATNN QLSAEPKDVE LLILEKLEFL VSSRPTAVNL AEAAGRLGRI VNGRAQVQGV
     GGNEVAEAYI EAAERMLEDD VRDNRAIGES GAKWVLEHAI TTKGSMSGTG QAKVAVLTHC
     NTGSLATAGY GTALGVIRSL HATGSLERAY CTETRPYNQG SRLTAFELVH DNIPATLITD
     NMAAALLARQ SAGPAQSVGV SAIIVGADRV AANGDTANKI GTYGLAVLAK YHGVKFLVAA
     PRTTIDMNTK TGADIVIEER PEKEVTKIRG PRVGEEGNGL GAMETITVAA DGIGVWNPAF
     DVTPAALVDG IITEVGVVEK DGSGVFHLER IF