ID G8YB58_PICSO Unreviewed; 402 AA.
AC G8YB58;
DT 22-FEB-2012, integrated into UniProtKB/TrEMBL.
DT 22-FEB-2012, sequence version 1.
DT 27-MAR-2024, entry version 57.
DE RecName: Full=Methylthioribose-1-phosphate isomerase {ECO:0000256|HAMAP-Rule:MF_03119};
DE Short=M1Pi {ECO:0000256|HAMAP-Rule:MF_03119};
DE Short=MTR-1-P isomerase {ECO:0000256|HAMAP-Rule:MF_03119};
DE EC=5.3.1.23 {ECO:0000256|HAMAP-Rule:MF_03119};
DE AltName: Full=S-methyl-5-thioribose-1-phosphate isomerase {ECO:0000256|HAMAP-Rule:MF_03119};
DE AltName: Full=Translation initiation factor eIF-2B subunit alpha/beta/delta-like protein {ECO:0000256|HAMAP-Rule:MF_03119};
GN Name=Piso0_001902 {ECO:0000313|EMBL:CCE82189.1};
GN Synonyms=MRI1 {ECO:0000256|HAMAP-Rule:MF_03119};
GN ORFNames=GNLVRS01_PISO0J00383g {ECO:0000313|EMBL:CCE82189.1};
OS Pichia sorbitophila (strain ATCC MYA-4447 / BCRC 22081 / CBS 7064 / NBRC
OS 10061 / NRRL Y-12695) (Hybrid yeast).
OC Eukaryota; Fungi; Dikarya; Ascomycota; Saccharomycotina; Saccharomycetes;
OC Saccharomycetales; Debaryomycetaceae; Millerozyma.
OX NCBI_TaxID=559304 {ECO:0000313|EMBL:CCE82189.1, ECO:0000313|Proteomes:UP000005222};
RN [1] {ECO:0000313|Proteomes:UP000005222}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=ATCC MYA-4447 / BCRC 22081 / CBS 7064 / NBRC 10061 / NRRL
RC Y-12695 {ECO:0000313|Proteomes:UP000005222};
RX DOI=10.1534/g3.111.000745;
RA Leh Louis V., Despons L., Friedrich A., Martin T., Durrens P.,
RA Casaregola S., Neuveglise C., Fairhead C., Marck C., Cruz J.A.,
RA Straub M.L., Kugler V., Sacerdot C., Uzunov Z., Thierry A., Weiss S.,
RA Bleykasten C., De Montigny J., Jacques N., Jung P., Lemaire M., Mallet S.,
RA Morel G., Richard G.F., Sarkar A., Savel G., Schacherer J., Seret M.L.,
RA Talla E., Samson G., Jubin C., Poulain J., Vacherie B., Barbe V.,
RA Pelletier E., Sherman D.J., Westhof E., Weissenbach J., Baret P.V.,
RA Wincker P., Gaillardin C., Dujon B., Souciet J.L.;
RT "Pichia sorbitophila, an interspecies yeast hybrid reveals early steps of
RT genome resolution following polyploidization.";
RL G3 (Bethesda) 2:299-311(2012).
CC -!- FUNCTION: Catalyzes the interconversion of methylthioribose-1-phosphate
CC (MTR-1-P) into methylthioribulose-1-phosphate (MTRu-1-P).
CC {ECO:0000256|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:0000256|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:0000256|HAMAP-Rule:MF_03119}.
CC -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000256|HAMAP-Rule:MF_03119}.
CC Nucleus {ECO:0000256|HAMAP-Rule:MF_03119}.
CC -!- SIMILARITY: Belongs to the eIF-2B alpha/beta/delta subunits family.
CC MtnA subfamily. {ECO:0000256|HAMAP-Rule:MF_03119}.
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DR EMBL; FO082050; CCE82189.1; -; Genomic_DNA.
DR AlphaFoldDB; G8YB58; -.
DR STRING; 559304.G8YB58; -.
DR eggNOG; KOG1468; Eukaryota.
DR HOGENOM; CLU_016218_1_3_1; -.
DR InParanoid; G8YB58; -.
DR OMA; RLWVDET; -.
DR UniPathway; UPA00904; UER00874.
DR Proteomes; UP000005222; Chromosome J.
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; translation initiation factor eif-2b, domain 1; 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 NCBIfam; TIGR00524; eIF-2B_rel; 1.
DR NCBIfam; TIGR00512; salvage_mtnA; 1.
DR PANTHER; PTHR43475; METHYLTHIORIBOSE-1-PHOSPHATE ISOMERASE; 1.
DR PANTHER; PTHR43475:SF1; METHYLTHIORIBOSE-1-PHOSPHATE ISOMERASE; 1.
DR Pfam; PF01008; IF-2B; 1.
DR SUPFAM; SSF100950; NagB/RpiA/CoA transferase-like; 1.
PE 3: Inferred from homology;
KW Amino-acid biosynthesis {ECO:0000256|ARBA:ARBA00022605, ECO:0000256|HAMAP-
KW Rule:MF_03119}; Cytoplasm {ECO:0000256|HAMAP-Rule:MF_03119};
KW Isomerase {ECO:0000256|ARBA:ARBA00023235, ECO:0000256|HAMAP-Rule:MF_03119};
KW Methionine biosynthesis {ECO:0000256|ARBA:ARBA00023167, ECO:0000256|HAMAP-
KW Rule:MF_03119}; Nucleus {ECO:0000256|HAMAP-Rule:MF_03119};
KW Reference proteome {ECO:0000313|Proteomes:UP000005222}.
FT ACT_SITE 274
FT /note="Proton donor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03119"
FT SITE 175
FT /note="Transition state stabilizer"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03119"
SQ SEQUENCE 402 AA; 44791 MW; 4E31E86A7CEE289A CRC64;
MGATGALEAI KFDKDAIRLE ILDQLCIPYQ TKYVRINGIE DAYQAIKKMQ VRGAPAIAIV
GAFAILVEAS EAIKQKRCLY LTEFLKSIEY LITSRPTAVN LSKACNEITE MISNRFDTKQ
QIDLNVLNDI KNYAISLYED DLRNNYSIGE NGVNYIKKTL KEENFRGPFS IITICNTGSL
ATSGHGTALG IVRTAFSDLS KDAGEDFWVD HVYPCETRPY NQGSRLTTFE LKFEKIPFTL
ICDNMVASLL RTLKKGKSVG KETAPVKFII AGADRVVFNG DTANKIGTFQ LAAIANHFNS
LAEKSNLKFM IAAPRTTVDL SLKTGEEIVI EQRPARELTT VKGPLVENDK VLEQKTVSIA
TPDINVWNPA FDVTPHELID AIVTEEKTYE KVDGKFKLHD FK
//
