ID   MTNB_SALSA              Reviewed;         251 AA.
AC   B5X277;
DT   20-APR-2010, integrated into UniProtKB/Swiss-Prot.
DT   25-NOV-2008, sequence version 1.
DT   03-AUG-2022, entry version 54.
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   Salmo salar (Atlantic salmon).
OC   Eukaryota; Metazoa; Chordata; Craniata; Vertebrata; Euteleostomi;
OC   Actinopterygii; Neopterygii; Teleostei; Protacanthopterygii; Salmoniformes;
OC   Salmonidae; Salmoninae; Salmo.
OX   NCBI_TaxID=8030;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE MRNA].
RC   TISSUE=Brain, and Spleen;
RX   PubMed=20433749; DOI=10.1186/1471-2164-11-279;
RA   Leong J.S., Jantzen S.G., von Schalburg K.R., Cooper G.A., Messmer A.M.,
RA   Liao N.Y., Munro S., Moore R., Holt R.A., Jones S.J., Davidson W.S.,
RA   Koop B.F.;
RT   "Salmo salar and Esox lucius full-length cDNA sequences reveal changes in
RT   evolutionary pressures on a post-tetraploidization genome.";
RL   BMC Genomics 11:279-279(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       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}.
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DR   EMBL; BT045146; ACI33408.1; -; mRNA.
DR   EMBL; BT047341; ACI67142.1; -; mRNA.
DR   EMBL; BT058570; ACN10283.1; -; mRNA.
DR   EMBL; BT060281; ACN12641.1; -; mRNA.
DR   RefSeq; NP_001133525.1; NM_001140053.1.
DR   AlphaFoldDB; B5X277; -.
DR   SMR; B5X277; -.
DR   STRING; 8030.ENSSSAP00000035673; -.
DR   GeneID; 100195024; -.
DR   KEGG; sasa:100195024; -.
DR   CTD; 51074; -.
DR   OrthoDB; 1062330at2759; -.
DR   UniPathway; UPA00904; UER00875.
DR   Proteomes; UP000087266; Chromosome ssa26.
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..251
FT                   /note="Methylthioribulose-1-phosphate dehydratase"
FT                   /id="PRO_0000393775"
FT   REGION          1..26
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   REGION          232..251
FT                   /note="Disordered"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   COMPBIAS        10..26
FT                   /note="Basic and acidic residues"
FT                   /evidence="ECO:0000256|SAM:MobiDB-lite"
FT   ACT_SITE        142
FT                   /note="Proton donor/acceptor"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03116"
FT   BINDING         100
FT                   /ligand="substrate"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03116"
FT   BINDING         118
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03116"
FT   BINDING         120
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03116"
FT   BINDING         198
FT                   /ligand="Zn(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29105"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_03116"
SQ   SEQUENCE   251 AA;  28691 MW;  6EFE3083EAB192DA CRC64;
     MTSVCDATNE DKENGSESTE SQDKEHPRVL IPELCRLFYQ LGWVTGTGGG LSLRRGDQIY
     IAPSGVQKER LQPDDMFVCD VEERDISSPP PWKKLKKSQC TPLFMNAFTM RAAQAVIHTH
     SKAAVMATLF YPGKEFRITH QEMIKGIRKG TSSTNYRYDE TLVVPIIENT PEERDLKERM
     ALAMEQYPDS CAVLVRRHGV YVWGESWEKA KTMCECYDYL FDIAVQMKQS GMDPSAPPIE
     ENHYYDVQQS Q