ID   MTNB_NAEGR              Reviewed;         240 AA.
AC   D2VN51;
DT   20-APR-2010, integrated into UniProtKB/Swiss-Prot.
DT   02-MAR-2010, sequence version 1.
DT   03-AUG-2022, entry version 57.
DE   RecName: Full=Probable methylthioribulose-1-phosphate dehydratase {ECO:0000255|HAMAP-Rule:MF_03116};
DE            Short=MTRu-1-P dehydratase {ECO:0000255|HAMAP-Rule:MF_03116};
DE            EC=4.2.1.109 {ECO:0000255|HAMAP-Rule:MF_03116};
GN   ORFNames=NAEGRDRAFT_70372;
OS   Naegleria gruberi (Amoeba).
OC   Eukaryota; Discoba; Heterolobosea; Tetramitia; Eutetramitia;
OC   Vahlkampfiidae; Naegleria.
OX   NCBI_TaxID=5762;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=ATCC 30224 / NEG-M;
RX   PubMed=20211133; DOI=10.1016/j.cell.2010.01.032;
RA   Fritz-Laylin L.K., Prochnik S.E., Ginger M.L., Dacks J.B., Carpenter M.L.,
RA   Field M.C., Kuo A., Paredez A., Chapman J., Pham J., Shu S., Neupane R.,
RA   Cipriano M., Mancuso J., Tu H., Salamov A., Lindquist E., Shapiro H.,
RA   Lucas S., Grigoriev I.V., Cande W.Z., Fulton C., Rokhsar D.S., Dawson S.C.;
RT   "The genome of Naegleria gruberi illuminates early eukaryotic
RT   versatility.";
RL   Cell 140:631-642(2010).
CC   -!- FUNCTION: Catalyzes the dehydration of methylthioribulose-1-phosphate
CC       (MTRu-1-P) into 2,3-diketo-5-methylthiopentyl-1-phosphate (DK-MTP-1-P).
CC       {ECO:0000255|HAMAP-Rule:MF_03116}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=S-methyl-5-thio-D-ribulose 1-phosphate = 5-methylsulfanyl-2,3-
CC         dioxopentyl phosphate + H2O; Xref=Rhea:RHEA:15549, ChEBI:CHEBI:15377,
CC         ChEBI:CHEBI:58548, ChEBI:CHEBI:58828; EC=4.2.1.109;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_03116};
CC   -!- COFACTOR:
CC       Name=Zn(2+); Xref=ChEBI:CHEBI:29105;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_03116};
CC       Note=Binds 1 zinc ion per subunit. {ECO:0000255|HAMAP-Rule:MF_03116};
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 2/6. {ECO:0000255|HAMAP-Rule:MF_03116}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000255|HAMAP-Rule:MF_03116}.
CC   -!- SIMILARITY: Belongs to the aldolase class II family. MtnB subfamily.
CC       {ECO:0000255|HAMAP-Rule:MF_03116}.
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DR   EMBL; GG738884; EFC41682.1; -; Genomic_DNA.
DR   AlphaFoldDB; D2VN51; -.
DR   SMR; D2VN51; -.
DR   STRING; 5762.XP_002674426.1; -.
DR   EnsemblProtists; EFC41682; EFC41682; NAEGRDRAFT_70372.
DR   VEuPathDB; AmoebaDB:NAEGRDRAFT_70372; -.
DR   eggNOG; KOG2631; Eukaryota.
DR   InParanoid; D2VN51; -.
DR   OMA; IRGHGLY; -.
DR   UniPathway; UPA00904; UER00875.
DR   Proteomes; UP000006671; Unassembled WGS sequence.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0046570; F:methylthioribulose 1-phosphate dehydratase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0008270; F:zinc ion binding; 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; 3.40.225.10; -; 1.
DR   HAMAP; MF_03116; Salvage_MtnB_euk; 1.
DR   InterPro; IPR001303; Aldolase_II/adducin_N.
DR   InterPro; IPR036409; Aldolase_II/adducin_N_sf.
DR   InterPro; IPR017714; MethylthioRu-1-P_deHdtase_MtnB.
DR   InterPro; IPR027514; Salvage_MtnB_euk.
DR   PANTHER; PTHR10640; PTHR10640; 1.
DR   Pfam; PF00596; Aldolase_II; 1.
DR   SMART; SM01007; Aldolase_II; 1.
DR   SUPFAM; SSF53639; SSF53639; 1.
DR   TIGRFAMs; TIGR03328; salvage_mtnB; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis; Cytoplasm; Lyase; Metal-binding;
KW   Methionine biosynthesis; Reference proteome; Zinc.
FT   CHAIN           1..240
FT                   /note="Probable methylthioribulose-1-phosphate dehydratase"
FT                   /id="PRO_0000393859"
FT   ACT_SITE        150
FT                   /note="Proton donor/acceptor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03116"
FT   BINDING         109
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03116"
FT   BINDING         127
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03116"
FT   BINDING         129
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03116"
FT   BINDING         200
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03116"
SQ   SEQUENCE   240 AA;  27164 MW;  A2EBEBA42D5D22C1 CRC64;
     MSQQSTAVKV FDHTQLNDTH TPQQVIVELM KLYYTQGWVS GTGGGISMKK DGKIYIAPSG
     IHKERIKEDQ IFVMEQDPEV QVVDIQSCQH LKTVYSPNDN GYNFKISACQ PLFQLCYDVR
     GAGAVIHSHA LSAMLATLIY DKEFKVTHLE MIKGIRGHGF YDELVVPIIE NTAFENELAG
     SLKEALEKYP NTFAVLVKRH GVYIWGKDWV EAKTHAEVYH YLFDCAVRMK QLGFDASSKQ