ID   MTNA_SCLS1              Reviewed;         445 AA.
AC   A7EGZ3;
DT   30-NOV-2010, integrated into UniProtKB/Swiss-Prot.
DT   11-SEP-2007, sequence version 1.
DT   25-MAY-2022, entry version 73.
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=SS1G_04585;
OS   Sclerotinia sclerotiorum (strain ATCC 18683 / 1980 / Ss-1) (White mold)
OS   (Whetzelinia sclerotiorum).
OC   Eukaryota; Fungi; Dikarya; Ascomycota; Pezizomycotina; Leotiomycetes;
OC   Helotiales; Sclerotiniaceae; Sclerotinia.
OX   NCBI_TaxID=665079;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 18683 / 1980 / Ss-1;
RX   PubMed=21876677; DOI=10.1371/journal.pgen.1002230;
RA   Amselem J., Cuomo C.A., van Kan J.A.L., Viaud M., Benito E.P., Couloux A.,
RA   Coutinho P.M., de Vries R.P., Dyer P.S., Fillinger S., Fournier E.,
RA   Gout L., Hahn M., Kohn L., Lapalu N., Plummer K.M., Pradier J.-M.,
RA   Quevillon E., Sharon A., Simon A., ten Have A., Tudzynski B., Tudzynski P.,
RA   Wincker P., Andrew M., Anthouard V., Beever R.E., Beffa R., Benoit I.,
RA   Bouzid O., Brault B., Chen Z., Choquer M., Collemare J., Cotton P.,
RA   Danchin E.G., Da Silva C., Gautier A., Giraud C., Giraud T., Gonzalez C.,
RA   Grossetete S., Gueldener U., Henrissat B., Howlett B.J., Kodira C.,
RA   Kretschmer M., Lappartient A., Leroch M., Levis C., Mauceli E.,
RA   Neuveglise C., Oeser B., Pearson M., Poulain J., Poussereau N.,
RA   Quesneville H., Rascle C., Schumacher J., Segurens B., Sexton A., Silva E.,
RA   Sirven C., Soanes D.M., Talbot N.J., Templeton M., Yandava C., Yarden O.,
RA   Zeng Q., Rollins J.A., Lebrun M.-H., Dickman M.;
RT   "Genomic analysis of the necrotrophic fungal pathogens Sclerotinia
RT   sclerotiorum and Botrytis cinerea.";
RL   PLoS Genet. 7:E1002230-E1002230(2011).
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; CH476625; EDO02109.1; -; Genomic_DNA.
DR   RefSeq; XP_001594777.1; XM_001594727.1.
DR   AlphaFoldDB; A7EGZ3; -.
DR   SMR; A7EGZ3; -.
DR   STRING; 665079.A7EGZ3; -.
DR   EnsemblFungi; EDO02109; EDO02109; SS1G_04585.
DR   GeneID; 5490914; -.
DR   KEGG; ssl:SS1G_04585; -.
DR   VEuPathDB; FungiDB:sscle_02g015640; -.
DR   eggNOG; KOG1468; Eukaryota.
DR   HOGENOM; CLU_016218_1_3_1; -.
DR   InParanoid; A7EGZ3; -.
DR   OMA; RLWVDET; -.
DR   UniPathway; UPA00904; UER00874.
DR   Proteomes; UP000001312; 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; IBA:GO_Central.
DR   GO; GO:0019509; P:L-methionine salvage from methylthioadenosine; IBA:GO_Central.
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..445
FT                   /note="Methylthioribose-1-phosphate isomerase"
FT                   /id="PRO_0000402053"
FT   ACT_SITE        286
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03119"
FT   SITE            202
FT                   /note="Transition state stabilizer"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03119"
SQ   SEQUENCE   445 AA;  48439 MW;  07A2DA600A39C45E CRC64;
     MAGLEAIKYG RGRLEVLDQL RLPHEFVYDN VSTCEEAFDS IKSMRVRGAP AIAIVAALAL
     AVELHHEKDG SKTKQEAVQY INKRLDYLLG SRPTAVDLSN AIKLLKRVSQ SAAEATNALD
     DSAACADVRK GYIDAAEKIL EDDLTTNLAI GRYGAEYLRR QQMPIGGEED DEDPSKFFTT
     SPPCTQGAPD RTYRKLSVLT HCNTGSLATS GHGTALGIIR SLHKMNYLDH AYCTETRPYN
     QGSRLTAFEL VYEKIPSTLI TDSMAGALFA RMKESKNISA VIVGADRVAR NGDTANKIGT
     YSLAVLAKAH NIKFIVAAPT TSIDLETVSG ADIKIEDRAP TELTQISGAV VGKDGHVDVN
     TTARVAIAHQ GIDVWNPSFD VTPSMYIDAV ITEKGEVVRS SKGTFDFKTI MPERWAQQVE
     GKELSAETNV KAHVDDGTQF PMENI