ID   MTNA_ASPFC              Reviewed;         387 AA.
AC   B0Y5C3;
DT   30-NOV-2010, integrated into UniProtKB/Swiss-Prot.
DT   08-APR-2008, sequence version 1.
DT   25-MAY-2022, entry version 57.
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; ORFNames=AFUB_062900;
OS   Neosartorya fumigata (strain CEA10 / CBS 144.89 / FGSC A1163) (Aspergillus
OS   fumigatus).
OC   Eukaryota; Fungi; Dikarya; Ascomycota; Pezizomycotina; Eurotiomycetes;
OC   Eurotiomycetidae; Eurotiales; Aspergillaceae; Aspergillus;
OC   Aspergillus subgen. Fumigati.
OX   NCBI_TaxID=451804;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=CEA10 / CBS 144.89 / FGSC A1163;
RX   PubMed=18404212; DOI=10.1371/journal.pgen.1000046;
RA   Fedorova N.D., Khaldi N., Joardar V.S., Maiti R., Amedeo P., Anderson M.J.,
RA   Crabtree J., Silva J.C., Badger J.H., Albarraq A., Angiuoli S., Bussey H.,
RA   Bowyer P., Cotty P.J., Dyer P.S., Egan A., Galens K., Fraser-Liggett C.M.,
RA   Haas B.J., Inman J.M., Kent R., Lemieux S., Malavazi I., Orvis J.,
RA   Roemer T., Ronning C.M., Sundaram J.P., Sutton G., Turner G., Venter J.C.,
RA   White O.R., Whitty B.R., Youngman P., Wolfe K.H., Goldman G.H.,
RA   Wortman J.R., Jiang B., Denning D.W., Nierman W.C.;
RT   "Genomic islands in the pathogenic filamentous fungus Aspergillus
RT   fumigatus.";
RL   PLoS Genet. 4:E1000046-E1000046(2008).
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; DS499598; EDP49958.1; -; Genomic_DNA.
DR   AlphaFoldDB; B0Y5C3; -.
DR   SMR; B0Y5C3; -.
DR   EnsemblFungi; EDP49958; EDP49958; AFUB_062900.
DR   VEuPathDB; FungiDB:AFUB_062900; -.
DR   HOGENOM; CLU_016218_1_3_1; -.
DR   PhylomeDB; B0Y5C3; -.
DR   UniPathway; UPA00904; UER00874.
DR   Proteomes; UP000001699; 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.
FT   CHAIN           1..387
FT                   /note="Methylthioribose-1-phosphate isomerase"
FT                   /id="PRO_0000402014"
FT   ACT_SITE        257
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03119"
FT   SITE            175
FT                   /note="Transition state stabilizer"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03119"
SQ   SEQUENCE   387 AA;  41591 MW;  90CBA2E3BDF0E6C2 CRC64;
     MASILQAIRY SHGKLAIIDQ LQLPYVEKFI TIRTSEDAWH AIKEMRVRGA PAIAIVAALA
     LASELNTLII HDKLSSRAEE VKLFIREKLD YLVSSRPTAV NLSDAARKLE STISGHADTP
     GATGRTVAEA FIRAAEEMMT KDLDDNMKIG QNGAEWIIKH ALARHKSTAT VLTHCNTGSL
     ATSGYGTALG VIRSLASKKA LEHAYCTETR PYNQGSRLTA FELVHDRLPA TLITDSMVAA
     LLASTKAEVD AIVVGADRVA ANGDTANKIG TYGLAVLAKY HGVKFLVAAP LTTIDLGTKS
     GEDIVIEERP SAEVTKIRGP VDGDHPADIV KLETVHIAAK GIDVWNPAFD VTPSTLIDGI
     ITEVGVIEKE ADGQFHLERL FIDNSAS