MTND_SYNS9
ID MTND_SYNS9 Reviewed; 186 AA.
AC Q3AZ58;
DT 20-JAN-2009, integrated into UniProtKB/Swiss-Prot.
DT 22-NOV-2005, sequence version 1.
DT 03-AUG-2022, entry version 103.
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};
GN OrderedLocusNames=Syncc9902_0651;
OS Synechococcus sp. (strain CC9902).
OC Bacteria; Cyanobacteria; Synechococcales; Synechococcaceae; Synechococcus;
OC unclassified Synechococcus.
OX NCBI_TaxID=316279;
RN [1]
RP NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC STRAIN=CC9902;
RA Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C., Glavina T.,
RA Hammon N., Israni S., Pitluck S., Martinez M., Schmutz J., Larimer F.,
RA Land M., Kyrpides N., Ivanova N., Richardson P.;
RT "Complete sequence of Synechococcus sp. CC9902.";
RL Submitted (AUG-2005) 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; CP000097; ABB25619.1; -; Genomic_DNA.
DR RefSeq; WP_011359463.1; NC_007513.1.
DR AlphaFoldDB; Q3AZ58; -.
DR SMR; Q3AZ58; -.
DR STRING; 316279.Syncc9902_0651; -.
DR EnsemblBacteria; ABB25619; ABB25619; Syncc9902_0651.
DR KEGG; sye:Syncc9902_0651; -.
DR eggNOG; COG1791; Bacteria.
DR HOGENOM; CLU_125400_0_0_3; -.
DR OMA; TTHWFDM; -.
DR OrthoDB; 1964262at2; -.
DR UniPathway; UPA00904; UER00878.
DR Proteomes; UP000002712; 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; -; 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; PTHR23418; 1.
DR Pfam; PF03079; ARD; 1.
DR SUPFAM; SSF51182; SSF51182; 1.
PE 3: Inferred from homology;
KW Amino-acid biosynthesis; Dioxygenase; Iron; Metal-binding;
KW Methionine biosynthesis; Nickel; Oxidoreductase; Reference proteome.
FT CHAIN 1..186
FT /note="Acireductone dioxygenase"
FT /id="PRO_0000359241"
FT REGION 1..21
FT /note="Disordered"
FT /evidence="ECO:0000256|SAM:MobiDB-lite"
FT BINDING 103
FT /ligand="Fe(2+)"
FT /ligand_id="ChEBI:CHEBI:29033"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01682"
FT BINDING 103
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 109
FT /ligand="Fe(2+)"
FT /ligand_id="ChEBI:CHEBI:29033"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01682"
FT BINDING 109
FT /ligand="Ni(2+)"
FT /ligand_id="ChEBI:CHEBI:49786"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01682"
FT BINDING 147
FT /ligand="Fe(2+)"
FT /ligand_id="ChEBI:CHEBI:29033"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01682"
FT BINDING 147
FT /ligand="Ni(2+)"
FT /ligand_id="ChEBI:CHEBI:49786"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01682"
FT SITE 102
FT /note="May play a role in metal incorporation in vivo"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01682"
FT SITE 108
FT /note="May play a role in transmitting local conformational
FT changes"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01682"
FT SITE 111
FT /note="Important to generate the dianion"
FT /evidence="ECO:0000255|HAMAP-Rule:MF_01682"
SQ SEQUENCE 186 AA; 20761 MW; 31818C821ECDD95F CRC64;
MSRLSIFPDG STSMDQSSPT PLLVTETPAE IQAELARRGI GFEQWPALQE LPLAADQSWI
LKAYANEIDR VKRDGGYATV DAIRMTPDHP ERVALRSKFL AEHTHAEDEV RFFVEGRGLF
CLHLGAEVLL TLCERGDLIR VPAGTKHWFD MGGQPAFCAV RWFNNAVGWV ATFTGNTISE
RFPTLD
