MTNA_THAPS
ID MTNA_THAPS Reviewed; 373 AA.
AC B8C6V3;
DT 30-NOV-2010, integrated into UniProtKB/Swiss-Prot.
DT 03-MAR-2009, sequence version 1.
DT 03-AUG-2022, entry version 58.
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=THAPSDRAFT_35896;
OS Thalassiosira pseudonana (Marine diatom) (Cyclotella nana).
OC Eukaryota; Sar; Stramenopiles; Ochrophyta; Bacillariophyta;
OC Coscinodiscophyceae; Thalassiosirophycidae; Thalassiosirales;
OC Thalassiosiraceae; Thalassiosira.
OX NCBI_TaxID=35128;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=CCMP1335 / NEPCC58 / CCAP 1085/12;
RX PubMed=15459382; DOI=10.1126/science.1101156;
RA Armbrust E.V., Berges J.A., Bowler C., Green B.R., Martinez D.,
RA Putnam N.H., Zhou S., Allen A.E., Apt K.E., Bechner M., Brzezinski M.A.,
RA Chaal B.K., Chiovitti A., Davis A.K., Demarest M.S., Detter J.C.,
RA Glavina T., Goodstein D., Hadi M.Z., Hellsten U., Hildebrand M.,
RA Jenkins B.D., Jurka J., Kapitonov V.V., Kroger N., Lau W.W., Lane T.W.,
RA Larimer F.W., Lippmeier J.C., Lucas S., Medina M., Montsant A., Obornik M.,
RA Parker M.S., Palenik B., Pazour G.J., Richardson P.M., Rynearson T.A.,
RA Saito M.A., Schwartz D.C., Thamatrakoln K., Valentin K., Vardi A.,
RA Wilkerson F.P., Rokhsar D.S.;
RT "The genome of the diatom Thalassiosira pseudonana: ecology, evolution, and
RT metabolism.";
RL Science 306:79-86(2004).
RN [2]
RP GENOME REANNOTATION.
RC STRAIN=CCMP1335 / NEPCC58 / CCAP 1085/12;
RG Diatom Consortium;
RA Grigoriev I., Grimwood J., Kuo A., Otillar R.P., Salamov A., Detter J.C.,
RA Schmutz J., Lindquist E., Shapiro H., Lucas S., Glavina del Rio T.,
RA Bruce D., Pitluck S., Rokhsar D., Armbrust V.;
RL Submitted (SEP-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; CM000644; EED90637.1; -; Genomic_DNA.
DR RefSeq; XP_002291786.1; XM_002291750.1.
DR AlphaFoldDB; B8C6V3; -.
DR SMR; B8C6V3; -.
DR STRING; 35128.Thaps35896; -.
DR EnsemblProtists; EED90637; EED90637; THAPSDRAFT_35896.
DR GeneID; 7445592; -.
DR KEGG; tps:THAPSDRAFT_35896; -.
DR eggNOG; KOG1468; Eukaryota.
DR InParanoid; B8C6V3; -.
DR OMA; RLWVDET; -.
DR UniPathway; UPA00904; UER00874.
DR Proteomes; UP000001449; Chromosome 8.
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..373
FT /note="Methylthioribose-1-phosphate isomerase"
FT /id="PRO_0000402006"
FT ACT_SITE 263
FT /note="Proton donor"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03119"
FT SITE 182
FT /note="Transition state stabilizer"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_03119"
SQ SEQUENCE 373 AA; 40403 MW; 71F018C216A6FBFF CRC64;
MTDPANTLRS LIFDVDSATN KATLSVLDQL RLPDETMYTK IVNVQDAWDA IRSMRIRGAP
LIAVVAVLGL AVDLSSNELT IGELDLISGI DEVKAFVTTK MEYLKTSRPT AVNLFNAMDE
LKSFIDDDAI KTREEVVSAI VQHAYLMLER DVSDNKAIGS HGADDLLSRH VHPEGVCVVT
ICNTGSLATA GWGTALGVAR ELQRRGKLRS IAALETRPYN QGSRLTAYEI MQEQMPNPIL
LCDSMAASYL KSKGADVCVV GADRVCANGD TANKIGTFQL SIIAKEMGVE FFVASPFTTL
DVELESGDMI EIEERPDGEM LESSGAPKGM KCWNPAFDVT PAKYISGIIT EKGVLKPSAD
GTFDVKGFVS MHS
