ID A0A2I0ANV3_9ASPA Unreviewed; 407 AA.
AC A0A2I0ANV3;
DT 28-FEB-2018, integrated into UniProtKB/TrEMBL.
DT 28-FEB-2018, sequence version 1.
DT 13-SEP-2023, entry version 19.
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 ORFNames=AXF42_Ash002450 {ECO:0000313|EMBL:PKA57146.1};
OS Apostasia shenzhenica.
OC Eukaryota; Viridiplantae; Streptophyta; Embryophyta; Tracheophyta;
OC Spermatophyta; Magnoliopsida; Liliopsida; Asparagales; Orchidaceae;
OC Apostasioideae; Apostasia.
OX NCBI_TaxID=1088818 {ECO:0000313|EMBL:PKA57146.1, ECO:0000313|Proteomes:UP000236161};
RN [1] {ECO:0000313|EMBL:PKA57146.1, ECO:0000313|Proteomes:UP000236161}
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=cv. Shenzhen {ECO:0000313|Proteomes:UP000236161};
RC TISSUE=Stem {ECO:0000313|EMBL:PKA57146.1};
RX PubMed=28902843; DOI=10.1038/nature23897;
RA Zhang G.Q., Liu K.W., Li Z., Lohaus R., Hsiao Y.Y., Niu S.C., Wang J.Y.,
RA Lin Y.C., Xu Q., Chen L.J., Yoshida K., Fujiwara S., Wang Z.W., Zhang Y.Q.,
RA Mitsuda N., Wang M., Liu G.H., Pecoraro L., Huang H.X., Xiao X.J., Lin M.,
RA Wu X.Y., Wu W.L., Chen Y.Y., Chang S.B., Sakamoto S., Ohme-Takagi M.,
RA Yagi M., Zeng S.J., Shen C.Y., Yeh C.M., Luo Y.B., Tsai W.C.,
RA Van de Peer Y., Liu Z.J.;
RT "The Apostasia genome and the evolution of orchids.";
RL Nature 549:379-383(2017).
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; KZ451969; PKA57146.1; -; Genomic_DNA.
DR AlphaFoldDB; A0A2I0ANV3; -.
DR STRING; 1088818.A0A2I0ANV3; -.
DR OrthoDB; 4853at2759; -.
DR UniPathway; UPA00904; UER00874.
DR Proteomes; UP000236161; 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; 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:UP000236161}.
FT ACT_SITE 285
FT /note="Proton donor"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03119"
FT SITE 205
FT /note="Transition state stabilizer"
FT /evidence="ECO:0000256|HAMAP-Rule:MF_03119"
SQ SEQUENCE 407 AA; 43251 MW; C92200FCF3CE8F8D CRC64;
MATADGHLLH AIGYVRGSLC LLDQVRHLPY FCSSGKPVPS PVLFPLSSSL IHFSSAQRKL
PLETVYLEIR NTVDGWNAIR EMVVRGAPAI AIAAALSLAV ELFHLNFDGT PANAATFIVK
KLEYLVSSRP TAVNLADAAT KLQNLVLKTS ETASGANVVF QAYFDAVEDM IADDVKTNMA
IGFHGAKIIK SQMNDGKRIC VLTHCNTGSL ATAGYGTALG VIRALHADET LEMAYCTETR
PFNQGSRLTA FELVHDKIPA TLIADSAAAA LMKTRRIGAV IVGADRIASN GDTANKIGTY
SLALCALHHG VPFYVAAPVT SIDLSLLSGD QITIEERSPK ELLCADGGLG KQVAASGIVL
LPGTIAVAES MRALNIEELV LELPKVEDNV ARDVQIICIT ICESNKG
//
