ID   MEND_PROMT              Reviewed;         598 AA.
AC   Q46LU3;
DT   01-JUL-2008, integrated into UniProtKB/Swiss-Prot.
DT   13-SEP-2005, sequence version 1.
DT   25-MAY-2022, entry version 92.
DE   RecName: Full=2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexene-1-carboxylate synthase {ECO:0000255|HAMAP-Rule:MF_01659};
DE            Short=SEPHCHC synthase {ECO:0000255|HAMAP-Rule:MF_01659};
DE            EC=2.2.1.9 {ECO:0000255|HAMAP-Rule:MF_01659};
GN   Name=menD {ECO:0000255|HAMAP-Rule:MF_01659}; OrderedLocusNames=PMN2A_0043;
OS   Prochlorococcus marinus (strain NATL2A).
OC   Bacteria; Cyanobacteria; Synechococcales; Prochlorococcaceae;
OC   Prochlorococcus.
OX   NCBI_TaxID=59920;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=NATL2A;
RX   PubMed=18159947; DOI=10.1371/journal.pgen.0030231;
RA   Kettler G.C., Martiny A.C., Huang K., Zucker J., Coleman M.L., Rodrigue S.,
RA   Chen F., Lapidus A., Ferriera S., Johnson J., Steglich C., Church G.M.,
RA   Richardson P., Chisholm S.W.;
RT   "Patterns and implications of gene gain and loss in the evolution of
RT   Prochlorococcus.";
RL   PLoS Genet. 3:2515-2528(2007).
CC   -!- FUNCTION: Catalyzes the thiamine diphosphate-dependent decarboxylation
CC       of 2-oxoglutarate and the subsequent addition of the resulting succinic
CC       semialdehyde-thiamine pyrophosphate anion to isochorismate to yield 2-
CC       succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexene-1-carboxylate (SEPHCHC).
CC       {ECO:0000255|HAMAP-Rule:MF_01659}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=2-oxoglutarate + H(+) + isochorismate = 5-enolpyruvoyl-6-
CC         hydroxy-2-succinyl-cyclohex-3-ene-1-carboxylate + CO2;
CC         Xref=Rhea:RHEA:25593, ChEBI:CHEBI:15378, ChEBI:CHEBI:16526,
CC         ChEBI:CHEBI:16810, ChEBI:CHEBI:29780, ChEBI:CHEBI:58818; EC=2.2.1.9;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01659};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01659};
CC       Name=Mn(2+); Xref=ChEBI:CHEBI:29035;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01659};
CC   -!- COFACTOR:
CC       Name=thiamine diphosphate; Xref=ChEBI:CHEBI:58937;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01659};
CC       Note=Binds 1 thiamine pyrophosphate per subunit. {ECO:0000255|HAMAP-
CC       Rule:MF_01659};
CC   -!- PATHWAY: Quinol/quinone metabolism; 1,4-dihydroxy-2-naphthoate
CC       biosynthesis; 1,4-dihydroxy-2-naphthoate from chorismate: step 2/7.
CC       {ECO:0000255|HAMAP-Rule:MF_01659}.
CC   -!- PATHWAY: Cofactor biosynthesis; phylloquinone biosynthesis.
CC       {ECO:0000255|HAMAP-Rule:MF_01659}.
CC   -!- SUBUNIT: Homodimer. {ECO:0000255|HAMAP-Rule:MF_01659}.
CC   -!- SIMILARITY: Belongs to the TPP enzyme family. MenD subfamily.
CC       {ECO:0000255|HAMAP-Rule:MF_01659}.
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DR   EMBL; CP000095; AAZ57535.1; -; Genomic_DNA.
DR   RefSeq; WP_011293577.1; NC_007335.2.
DR   AlphaFoldDB; Q46LU3; -.
DR   SMR; Q46LU3; -.
DR   STRING; 59920.PMN2A_0043; -.
DR   EnsemblBacteria; AAZ57535; AAZ57535; PMN2A_0043.
DR   KEGG; pmn:PMN2A_0043; -.
DR   HOGENOM; CLU_006051_3_0_3; -.
DR   OMA; FCNRGTS; -.
DR   OrthoDB; 897995at2; -.
DR   PhylomeDB; Q46LU3; -.
DR   UniPathway; UPA00995; -.
DR   UniPathway; UPA01057; UER00164.
DR   Proteomes; UP000002535; Chromosome.
DR   GO; GO:0070204; F:2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexene-1-carboxylic-acid synthase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0030145; F:manganese ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0030976; F:thiamine pyrophosphate binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0009234; P:menaquinone biosynthetic process; IEA:InterPro.
DR   GO; GO:0042372; P:phylloquinone biosynthetic process; IEA:UniProtKB-UniRule.
DR   HAMAP; MF_01659; MenD; 1.
DR   InterPro; IPR004433; MenaQ_synth_MenD.
DR   InterPro; IPR029061; THDP-binding.
DR   InterPro; IPR012001; Thiamin_PyroP_enz_TPP-bd_dom.
DR   PANTHER; PTHR42916; PTHR42916; 1.
DR   Pfam; PF02776; TPP_enzyme_N; 1.
DR   PIRSF; PIRSF004983; MenD; 1.
DR   SUPFAM; SSF52518; SSF52518; 2.
DR   TIGRFAMs; TIGR00173; menD; 1.
PE   3: Inferred from homology;
KW   Magnesium; Manganese; Metal-binding; Reference proteome;
KW   Thiamine pyrophosphate; Transferase.
FT   CHAIN           1..598
FT                   /note="2-succinyl-5-enolpyruvyl-6-hydroxy-3-cyclohexene-1-
FT                   carboxylate synthase"
FT                   /id="PRO_0000341807"
SQ   SEQUENCE   598 AA;  66391 MW;  B00F7D280CDAD443 CRC64;
     MTISLARYNF FISLELLKTL VAKGVKYFVL CPGSRSGPLA LAAASLSKRK ELTLITSIDE
     RSAAFLALGI SAASGQVSCV ITTSGSAVAN LLPAAVEADR SCHPLLFLTA DRPLRLKECG
     ANQAVNQQDF LKSVCRHFDE SPKEGIHLIS KERLTSLVGK SFEMASNIPG PVHINLAYEE
     PLHPCELDQK KVLDGWVIEG FLKGKITPTK DEVVKSFQSL KLLKLDPFSL GIIIVGPWRG
     KVKQLNSFRG ALKKWQKLTG WPILADPLSG VENDQEGLIN HWDLFFSIGL FEKIKEIQVL
     RLGPIPPSRE LQTWLKKPGK FQLLITEGDS RNLDPIGGST QFSEGFSCWV DKMLEVIPVK
     PAIDKKIVSK KLIKELIKYD LFIHDWLDKR LFRNGLITEP ALARLLPRLL PESIPVMIAS
     SSPIRDWLSY SGEGAFLRRC FGFRGASGID GTLSMGMGLS IIMGRMVLVT GDLALLHDTN
     GWLFSKDKNI SLIVIMIDNG GGGIFNQLNI DRIEEGDFED IFLMPQQVCH LTLAKAYGLK
     YKQVACLDDL EKAIEWSFSL STNVLIRVCT NSIEDHRLRV NLSDDLKKTL SENLSSFD