MTNA_SCHJY
ID MTNA_SCHJY Reviewed; 356 AA.
AC B6K4Q2;
DT 30-NOV-2010, integrated into UniProtKB/Swiss-Prot.
DT 16-DEC-2008, sequence version 1.
DT 25-MAY-2022, entry version 52.
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=SJAG_03614;
OS Schizosaccharomyces japonicus (strain yFS275 / FY16936) (Fission yeast).
OC Eukaryota; Fungi; Dikarya; Ascomycota; Taphrinomycotina;
OC Schizosaccharomycetes; Schizosaccharomycetales; Schizosaccharomycetaceae;
OC Schizosaccharomyces.
OX NCBI_TaxID=402676;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=yFS275 / FY16936;
RX PubMed=21511999; DOI=10.1126/science.1203357;
RA Rhind N., Chen Z., Yassour M., Thompson D.A., Haas B.J., Habib N.,
RA Wapinski I., Roy S., Lin M.F., Heiman D.I., Young S.K., Furuya K., Guo Y.,
RA Pidoux A., Chen H.M., Robbertse B., Goldberg J.M., Aoki K., Bayne E.H.,
RA Berlin A.M., Desjardins C.A., Dobbs E., Dukaj L., Fan L., FitzGerald M.G.,
RA French C., Gujja S., Hansen K., Keifenheim D., Levin J.Z., Mosher R.A.,
RA Mueller C.A., Pfiffner J., Priest M., Russ C., Smialowska A., Swoboda P.,
RA Sykes S.M., Vaughn M., Vengrova S., Yoder R., Zeng Q., Allshire R.,
RA Baulcombe D., Birren B.W., Brown W., Ekwall K., Kellis M., Leatherwood J.,
RA Levin H., Margalit H., Martienssen R., Nieduszynski C.A., Spatafora J.W.,
RA Friedman N., Dalgaard J.Z., Baumann P., Niki H., Regev A., Nusbaum C.;
RT "Comparative functional genomics of the fission yeasts.";
RL Science 332:930-936(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; KE651167; EEB08459.1; -; Genomic_DNA.
DR RefSeq; XP_002174752.1; XM_002174716.2.
DR AlphaFoldDB; B6K4Q2; -.
DR SMR; B6K4Q2; -.
DR STRING; 4897.EEB08459; -.
DR EnsemblFungi; EEB08459; EEB08459; SJAG_03614.
DR GeneID; 7051322; -.
DR VEuPathDB; FungiDB:SJAG_03614; -.
DR eggNOG; KOG1468; Eukaryota.
DR HOGENOM; CLU_016218_1_3_1; -.
DR OMA; RLWVDET; -.
DR OrthoDB; 1410886at2759; -.
DR UniPathway; UPA00904; UER00874.
DR Proteomes; UP000001744; 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..356
FT /note="Methylthioribose-1-phosphate isomerase"
FT /id="PRO_0000402052"
FT ACT_SITE 234
FT /note="Proton donor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03119"
FT SITE 156
FT /note="Transition state stabilizer"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03119"
SQ SEQUENCE 356 AA; 39247 MW; 781F013421D1B5E6 CRC64;
MSLQAIVYED NKLSVLDQLL LPHEHKYIPI KSVEDAYSVI KNMQVRGAPA IAIVAALAVA
VSLVNVKTDD LRNYVIESFE RLKQSRPTAV NLFQIAYKMR KLAEAYEGEE IRVVVVKEAE
DLLARDLRDN HTIGELGSEY VLKLVNKPRL TILTHCNTGS LATSGYGTAL GIIRSLNEKG
AIERVYCTET RPNNQGSRLT AYELLYDNIA STLITDSTAA SIMPKIDAVI VGCDRVARNG
DTANKIGTLS LAILAKHFNV PFIVAGPSFS IDMTLPDGEQ TKIEERPSRE LVMVRGPVVR
DFTTHQFGAR ESVHIAPINV KAYCPVFDVT PADLISAVVT EKAVFTKGPN GYEFKW
