ID   MTNB_XENLA              Reviewed;         239 AA.
AC   Q6NU29;
DT   30-MAY-2006, integrated into UniProtKB/Swiss-Prot.
DT   05-JUL-2004, sequence version 1.
DT   03-AUG-2022, entry version 76.
DE   RecName: Full=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};
DE   AltName: Full=APAF1-interacting protein homolog {ECO:0000255|HAMAP-Rule:MF_03116};
GN   Name=apip {ECO:0000255|HAMAP-Rule:MF_03116};
OS   Xenopus laevis (African clawed frog).
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi; Amphibia;
OC   Batrachia; Anura; Pipoidea; Pipidae; Xenopodinae; Xenopus; Xenopus.
OX   NCBI_TaxID=8355;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
RC   TISSUE=Embryo;
RG   NIH - Xenopus Gene Collection (XGC) project;
RL   Submitted (APR-2004) to the EMBL/GenBank/DDBJ databases.
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       Functions in the methionine salvage pathway. May play a role in
CC       apoptosis. {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}.
CC   ---------------------------------------------------------------------------
CC   Copyrighted by the UniProt Consortium, see https://www.uniprot.org/terms
CC   Distributed under the Creative Commons Attribution (CC BY 4.0) License
CC   ---------------------------------------------------------------------------
DR   EMBL; BC068773; AAH68773.1; -; mRNA.
DR   RefSeq; NP_001084676.1; NM_001091207.1.
DR   AlphaFoldDB; Q6NU29; -.
DR   SMR; Q6NU29; -.
DR   DNASU; 414636; -.
DR   GeneID; 414636; -.
DR   KEGG; xla:414636; -.
DR   CTD; 414636; -.
DR   Xenbase; XB-GENE-6252291; apip.S.
DR   OMA; CASLFMK; -.
DR   OrthoDB; 1062330at2759; -.
DR   UniPathway; UPA00904; UER00875.
DR   Proteomes; UP000186698; Chromosome 4S.
DR   Bgee; 414636; Expressed in blastula and 19 other tissues.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0046570; F:methylthioribulose 1-phosphate dehydratase activity; ISS:UniProtKB.
DR   GO; GO:0008270; F:zinc ion binding; ISS:UniProtKB.
DR   GO; GO:0006915; P:apoptotic process; IEA:UniProtKB-KW.
DR   GO; GO:0019509; P:L-methionine salvage from methylthioadenosine; ISS:UniProtKB.
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   2: Evidence at transcript level;
KW   Amino-acid biosynthesis; Apoptosis; Cytoplasm; Lyase; Metal-binding;
KW   Methionine biosynthesis; Reference proteome; Zinc.
FT   CHAIN           1..239
FT                   /note="Methylthioribulose-1-phosphate dehydratase"
FT                   /id="PRO_0000239026"
FT   ACT_SITE        136
FT                   /note="Proton donor/acceptor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03116"
FT   BINDING         94
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03116"
FT   BINDING         112
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03116"
FT   BINDING         114
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03116"
FT   BINDING         192
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03116"
SQ   SEQUENCE   239 AA;  27172 MW;  690DBAE5755AA0CB CRC64;
     MYYCNRDNCN QTDNAKDKAH PRNLIPELCR QFYNLGWVTG TGGGISLKYG DEIYIAPSGV
     QKERIQPDDL FVCDIDEKDI SCPPPYRNLK KSQCTPLFMN AYTMRDAGAV IHTHSKAAVM
     ATLMFPGKEF LITHQEMIKG IKKGTSGGYY RYNDMLAVPI VENTPEEKDL KERMARAMTE
     YPDTCAVLVR RHGVYVWGDT WEKAKTMCEC YDYLFDIAVQ MKQHGLDPSA VPTEEKGIV