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Database: UniProt
Entry: MTND_EXIS2
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ID   MTND_EXIS2              Reviewed;         179 AA.
AC   B1YIX9;
DT   20-JAN-2009, integrated into UniProtKB/Swiss-Prot.
DT   20-MAY-2008, sequence version 1.
DT   24-JAN-2024, entry version 92.
DE   RecName: Full=Acireductone dioxygenase {ECO:0000255|HAMAP-Rule:MF_01682};
DE   AltName: Full=1,2-dihydroxy-3-keto-5-methylthiopentene dioxygenase {ECO:0000255|HAMAP-Rule:MF_01682};
DE            Short=DHK-MTPene dioxygenase {ECO:0000255|HAMAP-Rule:MF_01682};
DE   AltName: Full=Acireductone dioxygenase (Fe(2+)-requiring) {ECO:0000255|HAMAP-Rule:MF_01682};
DE            Short=ARD' {ECO:0000255|HAMAP-Rule:MF_01682};
DE            Short=Fe-ARD {ECO:0000255|HAMAP-Rule:MF_01682};
DE            EC=1.13.11.54 {ECO:0000255|HAMAP-Rule:MF_01682};
DE   AltName: Full=Acireductone dioxygenase (Ni(2+)-requiring) {ECO:0000255|HAMAP-Rule:MF_01682};
DE            Short=ARD {ECO:0000255|HAMAP-Rule:MF_01682};
DE            Short=Ni-ARD {ECO:0000255|HAMAP-Rule:MF_01682};
DE            EC=1.13.11.53 {ECO:0000255|HAMAP-Rule:MF_01682};
GN   Name=mtnD {ECO:0000255|HAMAP-Rule:MF_01682}; OrderedLocusNames=Exig_0427;
OS   Exiguobacterium sibiricum (strain DSM 17290 / CIP 109462 / JCM 13490 /
OS   255-15).
OC   Bacteria; Bacillota; Bacilli; Bacillales;
OC   Bacillales Family XII. Incertae Sedis; Exiguobacterium.
OX   NCBI_TaxID=262543;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 17290 / CIP 109462 / JCM 13490 / 255-15;
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Glavina del Rio T., Dalin E., Tice H.,
RA   Bruce D., Goodwin L., Pitluck S., Kiss H., Chertkov O., Monk C.,
RA   Brettin T., Detter J.C., Han C., Kuske C.R., Schmutz J., Larimer F.,
RA   Land M., Hauser L., Kyrpides N., Mikhailova N., Vishnivetskaya T.,
RA   Rodrigues D.F., Gilichinsky D., Tiedje J., Richardson P.;
RT   "Complete sequence of chromosome of Exiguobacterium sibiricum 255-15.";
RL   Submitted (APR-2008) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Catalyzes 2 different reactions between oxygen and the
CC       acireductone 1,2-dihydroxy-3-keto-5-methylthiopentene (DHK-MTPene)
CC       depending upon the metal bound in the active site. Fe-containing
CC       acireductone dioxygenase (Fe-ARD) produces formate and 2-keto-4-
CC       methylthiobutyrate (KMTB), the alpha-ketoacid precursor of methionine
CC       in the methionine recycle pathway. Ni-containing acireductone
CC       dioxygenase (Ni-ARD) produces methylthiopropionate, carbon monoxide and
CC       formate, and does not lie on the methionine recycle pathway.
CC       {ECO:0000255|HAMAP-Rule:MF_01682}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=1,2-dihydroxy-5-(methylsulfanyl)pent-1-en-3-one + O2 = 3-
CC         (methylsulfanyl)propanoate + CO + formate + 2 H(+);
CC         Xref=Rhea:RHEA:14161, ChEBI:CHEBI:15378, ChEBI:CHEBI:15379,
CC         ChEBI:CHEBI:15740, ChEBI:CHEBI:17245, ChEBI:CHEBI:49016,
CC         ChEBI:CHEBI:49252; EC=1.13.11.53; Evidence={ECO:0000255|HAMAP-
CC         Rule:MF_01682};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=1,2-dihydroxy-5-(methylsulfanyl)pent-1-en-3-one + O2 = 4-
CC         methylsulfanyl-2-oxobutanoate + formate + 2 H(+);
CC         Xref=Rhea:RHEA:24504, ChEBI:CHEBI:15378, ChEBI:CHEBI:15379,
CC         ChEBI:CHEBI:15740, ChEBI:CHEBI:16723, ChEBI:CHEBI:49252;
CC         EC=1.13.11.54; Evidence={ECO:0000255|HAMAP-Rule:MF_01682};
CC   -!- COFACTOR:
CC       Name=Fe(2+); Xref=ChEBI:CHEBI:29033;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01682};
CC       Note=Binds 1 Fe(2+) cation per monomer. {ECO:0000255|HAMAP-
CC       Rule:MF_01682};
CC   -!- COFACTOR:
CC       Name=Ni(2+); Xref=ChEBI:CHEBI:49786;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01682};
CC       Note=Binds 1 nickel ion per monomer. {ECO:0000255|HAMAP-Rule:MF_01682};
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 5/6. {ECO:0000255|HAMAP-Rule:MF_01682}.
CC   -!- SUBUNIT: Monomer. {ECO:0000255|HAMAP-Rule:MF_01682}.
CC   -!- SIMILARITY: Belongs to the acireductone dioxygenase (ARD) family.
CC       {ECO:0000255|HAMAP-Rule:MF_01682}.
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DR   EMBL; CP001022; ACB59909.1; -; Genomic_DNA.
DR   RefSeq; WP_012369333.1; NC_010556.1.
DR   AlphaFoldDB; B1YIX9; -.
DR   SMR; B1YIX9; -.
DR   STRING; 262543.Exig_0427; -.
DR   KEGG; esi:Exig_0427; -.
DR   eggNOG; COG1791; Bacteria.
DR   HOGENOM; CLU_125400_0_0_9; -.
DR   OMA; TTHWFDM; -.
DR   OrthoDB; 9795636at2; -.
DR   UniPathway; UPA00904; UER00878.
DR   Proteomes; UP000001681; Chromosome.
DR   GO; GO:0010308; F:acireductone dioxygenase (Ni2+-requiring) activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0010309; F:acireductone dioxygenase [iron(II)-requiring] activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0005506; F:iron ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0016151; F:nickel cation 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   CDD; cd02232; cupin_ARD; 1.
DR   Gene3D; 2.60.120.10; Jelly Rolls; 1.
DR   HAMAP; MF_01682; Salvage_MtnD; 1.
DR   InterPro; IPR004313; ARD.
DR   InterPro; IPR023956; ARD_bac.
DR   InterPro; IPR014710; RmlC-like_jellyroll.
DR   InterPro; IPR011051; RmlC_Cupin_sf.
DR   PANTHER; PTHR23418:SF0; 1,2-DIHYDROXY-3-KETO-5-METHYLTHIOPENTENE DIOXYGENASE; 1.
DR   PANTHER; PTHR23418; ACIREDUCTONE DIOXYGENASE; 1.
DR   Pfam; PF03079; ARD; 1.
DR   SUPFAM; SSF51182; RmlC-like cupins; 1.
PE   3: Inferred from homology;
KW   Amino-acid biosynthesis; Dioxygenase; Iron; Metal-binding;
KW   Methionine biosynthesis; Nickel; Oxidoreductase; Reference proteome.
FT   CHAIN           1..179
FT                   /note="Acireductone dioxygenase"
FT                   /id="PRO_0000359191"
FT   BINDING         99
FT                   /ligand="Fe(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29033"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01682"
FT   BINDING         99
FT                   /ligand="Ni(2+)"
FT                   /ligand_id="ChEBI:CHEBI:49786"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01682"
FT   BINDING         101
FT                   /ligand="Fe(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29033"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01682"
FT   BINDING         101
FT                   /ligand="Ni(2+)"
FT                   /ligand_id="ChEBI:CHEBI:49786"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01682"
FT   BINDING         105
FT                   /ligand="Fe(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29033"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01682"
FT   BINDING         105
FT                   /ligand="Ni(2+)"
FT                   /ligand_id="ChEBI:CHEBI:49786"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01682"
FT   BINDING         144
FT                   /ligand="Fe(2+)"
FT                   /ligand_id="ChEBI:CHEBI:29033"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01682"
FT   BINDING         144
FT                   /ligand="Ni(2+)"
FT                   /ligand_id="ChEBI:CHEBI:49786"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01682"
FT   SITE            98
FT                   /note="May play a role in metal incorporation in vivo"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01682"
FT   SITE            104
FT                   /note="May play a role in transmitting local conformational
FT                   changes"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01682"
FT   SITE            107
FT                   /note="Important to generate the dianion"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01682"
SQ   SEQUENCE   179 AA;  20463 MW;  A8AA6F8269FD8C33 CRC64;
     MATVLFQKTN ERYTDQNEVS AFLASRGVLY EQWDVSKLPA ELVDTYTLTD ADKQTILDTF
     QSEITDVSER RGYQTADIIS LSDATPNLDE LLVNFQKEHH HTDDEVRFIV SGHGVFAIQD
     DEVGYYNIEL NPGDLISVPV NTRHYFTLQE DRKVVAVRIF VTTDGWVPIY EKDPIETAN
//
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