ID   MTNA_ARTOC              Reviewed;         385 AA.
AC   C5FY68;
DT   30-NOV-2010, integrated into UniProtKB/Swiss-Prot.
DT   28-JUL-2009, sequence version 1.
DT   25-MAY-2022, entry version 56.
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=MCYG_07285;
OS   Arthroderma otae (strain ATCC MYA-4605 / CBS 113480) (Microsporum canis).
OC   Eukaryota; Fungi; Dikarya; Ascomycota; Pezizomycotina; Eurotiomycetes;
OC   Eurotiomycetidae; Onygenales; Arthrodermataceae; Microsporum.
OX   NCBI_TaxID=554155;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC MYA-4605 / CBS 113480;
RX   PubMed=22951933; DOI=10.1128/mbio.00259-12;
RA   Martinez D.A., Oliver B.G., Graeser Y., Goldberg J.M., Li W.,
RA   Martinez-Rossi N.M., Monod M., Shelest E., Barton R.C., Birch E.,
RA   Brakhage A.A., Chen Z., Gurr S.J., Heiman D., Heitman J., Kosti I.,
RA   Rossi A., Saif S., Samalova M., Saunders C.W., Shea T., Summerbell R.C.,
RA   Xu J., Young S., Zeng Q., Birren B.W., Cuomo C.A., White T.C.;
RT   "Comparative genome analysis of Trichophyton rubrum and related
RT   dermatophytes reveals candidate genes involved in infection.";
RL   MBio 3:E259-E259(2012).
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; DS995707; EEQ34466.1; -; Genomic_DNA.
DR   RefSeq; XP_002843502.1; XM_002843456.1.
DR   AlphaFoldDB; C5FY68; -.
DR   SMR; C5FY68; -.
DR   STRING; 63405.XP_002843502.1; -.
DR   EnsemblFungi; EEQ34466; EEQ34466; MCYG_07285.
DR   GeneID; 9226808; -.
DR   eggNOG; KOG1468; Eukaryota.
DR   HOGENOM; CLU_016218_1_3_1; -.
DR   OMA; RLWVDET; -.
DR   OrthoDB; 1410886at2759; -.
DR   UniPathway; UPA00904; UER00874.
DR   Proteomes; UP000002035; 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..385
FT                   /note="Methylthioribose-1-phosphate isomerase"
FT                   /id="PRO_0000402033"
FT   ACT_SITE        256
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03119"
FT   SITE            174
FT                   /note="Transition state stabilizer"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03119"
SQ   SEQUENCE   385 AA;  41809 MW;  6B8CE28A1111871C CRC64;
     MSLQSIRYKR GMLQVLDQLQ VPHVERYIPV STAKEGWHVI KEMHVRGAPA IAIVAVLSLS
     IELTELMDHE KLSTEADEVE AYILEKLDYL VTSRPTAVNL SDAAIKLKTL VQKRKQIGDP
     KGKDLAEAYV EAAEKMLIDD AMDNHRLGDF GATWIVNNTP VGKEGKKVGV LTHCNTGSLA
     TAGYGTALGV IRSLLASDKL EHAYCTETRP YNQGARLTAF ELVHDKIPAT LITDSMAASL
     LAQKGAGLAA IVVGADRVVA NGDTANKIGT YQLAVLAKYH GVKFIVAAPR TTIDLRTKEG
     EDIIIEERAK SEVTRITGPR ISDLGKNEEN ITLETVNIAA PGIDVWNPAF DVTPYDLIDA
     IVTEVGVAEK NADGLFQLEK LFGFP