MTNA_POPTR
ID MTNA_POPTR Reviewed; 375 AA.
AC B9HCR2;
DT 30-NOV-2010, integrated into UniProtKB/Swiss-Prot.
DT 19-FEB-2014, sequence version 2.
DT 25-MAY-2022, entry version 77.
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 ORFNames=POPTRDRAFT_832064;
OS Populus trichocarpa (Western balsam poplar) (Populus balsamifera subsp.
OS trichocarpa).
OC Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC Spermatophyta; Magnoliopsida; eudicotyledons; Gunneridae; Pentapetalae;
OC rosids; fabids; Malpighiales; Salicaceae; Saliceae; Populus.
OX NCBI_TaxID=3694;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=cv. Nisqually;
RX PubMed=16973872; DOI=10.1126/science.1128691;
RA Tuskan G.A., Difazio S., Jansson S., Bohlmann J., Grigoriev I.,
RA Hellsten U., Putnam N., Ralph S., Rombauts S., Salamov A., Schein J.,
RA Sterck L., Aerts A., Bhalerao R.R., Bhalerao R.P., Blaudez D., Boerjan W.,
RA Brun A., Brunner A., Busov V., Campbell M., Carlson J., Chalot M.,
RA Chapman J., Chen G.-L., Cooper D., Coutinho P.M., Couturier J., Covert S.,
RA Cronk Q., Cunningham R., Davis J., Degroeve S., Dejardin A.,
RA dePamphilis C.W., Detter J., Dirks B., Dubchak I., Duplessis S.,
RA Ehlting J., Ellis B., Gendler K., Goodstein D., Gribskov M., Grimwood J.,
RA Groover A., Gunter L., Hamberger B., Heinze B., Helariutta Y.,
RA Henrissat B., Holligan D., Holt R., Huang W., Islam-Faridi N., Jones S.,
RA Jones-Rhoades M., Jorgensen R., Joshi C., Kangasjaervi J., Karlsson J.,
RA Kelleher C., Kirkpatrick R., Kirst M., Kohler A., Kalluri U., Larimer F.,
RA Leebens-Mack J., Leple J.-C., Locascio P., Lou Y., Lucas S., Martin F.,
RA Montanini B., Napoli C., Nelson D.R., Nelson C., Nieminen K., Nilsson O.,
RA Pereda V., Peter G., Philippe R., Pilate G., Poliakov A., Razumovskaya J.,
RA Richardson P., Rinaldi C., Ritland K., Rouze P., Ryaboy D., Schmutz J.,
RA Schrader J., Segerman B., Shin H., Siddiqui A., Sterky F., Terry A.,
RA Tsai C.-J., Uberbacher E., Unneberg P., Vahala J., Wall K., Wessler S.,
RA Yang G., Yin T., Douglas C., Marra M., Sandberg G., Van de Peer Y.,
RA Rokhsar D.S.;
RT "The genome of black cottonwood, Populus trichocarpa (Torr. & Gray).";
RL Science 313:1596-1604(2006).
RN [2]
RP GENOME REANNOTATION.
RC STRAIN=cv. Nisqually;
RG US DOE Joint Genome Institute (JGI-PGF);
RA Grigoriev I.V., Terry A., Salamov A.A., Otillar R., Lou Y., Lucas S.,
RA Hammon N., Glavina del Rio T., Detter J., Kalin E., Tice H., Pitluck S.,
RA Chapman J., Putnam N.H., Brunner A., Busov V., Campbell M., Chalot M.,
RA Covert S., Davis J., DiFazio S., Gribskov M., Gunter L., Hamberger B.,
RA Jansson S., Joshi C., Larimer F., Martin F., Napoli C., Nelson D.,
RA Ralph S., Rombauts S., Rouze P., Schrader J., Tsai C., Vahala J.,
RA Tuskan G., Rokhsar D.;
RL Submitted (DEC-2008) to the EMBL/GenBank/DDBJ databases.
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; CM009295; EEE92044.2; -; Genomic_DNA.
DR RefSeq; XP_002308521.2; XM_002308485.2.
DR AlphaFoldDB; B9HCR2; -.
DR SMR; B9HCR2; -.
DR STRING; 3694.POPTR_0006s23650.1; -.
DR EnsemblPlants; PNT32996; PNT32996; POPTR_006G219900v3.
DR Gramene; PNT32996; PNT32996; POPTR_006G219900v3.
DR eggNOG; KOG1468; Eukaryota.
DR HOGENOM; CLU_016218_1_3_1; -.
DR InParanoid; B9HCR2; -.
DR OMA; RLWVDET; -.
DR UniPathway; UPA00904; UER00874.
DR Proteomes; UP000006729; Chromosome 6.
DR ExpressionAtlas; B9HCR2; baseline and differential.
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..375
FT /note="Methylthioribose-1-phosphate isomerase"
FT /id="PRO_0000401995"
FT ACT_SITE 259
FT /note="Proton donor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03119"
FT SITE 179
FT /note="Transition state stabilizer"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03119"
SQ SEQUENCE 375 AA; 39471 MW; A302E656B59C3FAB CRC64;
MATNPSNGLE GDNTLQSICY HRGSLKLLDQ RKLPLETTYL DIKDASDGWL AIREMVVRGA
PAIAISAALS LAVEVSNLEN FNGTPVEAAS FLAGKLDYLV SSRPTAVNLS DAATKLKEVV
SKAAAAASNC QSVFQAYIEA AEIMLADDVA SNKAIGSYGA RFIQNQQKDP TKLSVLTHCN
TGSLATAGYG TALGVIRALH GEGVLQRAYC TETRPFNQGS RLTAFELVHE KIPATLIADS
AAAALMKDSK VSAVVVGADR VAANGDTANK IGTYSLALCA MHHNIPFYVA APLTSFDSSL
SSGKEIIIEE RSPKEMLNAR GGLGEQVAAS GISVWNPAFD VTPASLISGI ITEKGVITKT
GMDDFDIKDF INKAG
