ID   ISPD_TOLAT              Reviewed;         227 AA.
AC   C4LBQ9;
DT   22-SEP-2009, integrated into UniProtKB/Swiss-Prot.
DT   07-JUL-2009, sequence version 1.
DT   25-MAY-2022, entry version 61.
DE   RecName: Full=2-C-methyl-D-erythritol 4-phosphate cytidylyltransferase {ECO:0000255|HAMAP-Rule:MF_00108};
DE            EC=2.7.7.60 {ECO:0000255|HAMAP-Rule:MF_00108};
DE   AltName: Full=4-diphosphocytidyl-2C-methyl-D-erythritol synthase {ECO:0000255|HAMAP-Rule:MF_00108};
DE   AltName: Full=MEP cytidylyltransferase {ECO:0000255|HAMAP-Rule:MF_00108};
DE            Short=MCT {ECO:0000255|HAMAP-Rule:MF_00108};
GN   Name=ispD {ECO:0000255|HAMAP-Rule:MF_00108}; OrderedLocusNames=Tola_2740;
OS   Tolumonas auensis (strain DSM 9187 / TA4).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Aeromonadales;
OC   Aeromonadaceae; Tolumonas.
OX   NCBI_TaxID=595494;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 9187 / TA4;
RG   US DOE Joint Genome Institute;
RA   Lucas S., Copeland A., Lapidus A., Glavina del Rio T., Tice H., Bruce D.,
RA   Goodwin L., Pitluck S., Chertkov O., Brettin T., Detter J.C., Han C.,
RA   Larimer F., Land M., Hauser L., Kyrpides N., Mikhailova N., Spring S.,
RA   Beller H.;
RT   "Complete sequence of Tolumonas auensis DSM 9187.";
RL   Submitted (MAY-2009) to the EMBL/GenBank/DDBJ databases.
CC   -!- FUNCTION: Catalyzes the formation of 4-diphosphocytidyl-2-C-methyl-D-
CC       erythritol from CTP and 2-C-methyl-D-erythritol 4-phosphate (MEP).
CC       {ECO:0000255|HAMAP-Rule:MF_00108}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=2-C-methyl-D-erythritol 4-phosphate + CTP + H(+) = 4-CDP-2-C-
CC         methyl-D-erythritol + diphosphate; Xref=Rhea:RHEA:13429,
CC         ChEBI:CHEBI:15378, ChEBI:CHEBI:33019, ChEBI:CHEBI:37563,
CC         ChEBI:CHEBI:57823, ChEBI:CHEBI:58262; EC=2.7.7.60;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_00108};
CC   -!- PATHWAY: Isoprenoid biosynthesis; isopentenyl diphosphate biosynthesis
CC       via DXP pathway; isopentenyl diphosphate from 1-deoxy-D-xylulose 5-
CC       phosphate: step 2/6. {ECO:0000255|HAMAP-Rule:MF_00108}.
CC   -!- SIMILARITY: Belongs to the IspD/TarI cytidylyltransferase family. IspD
CC       subfamily. {ECO:0000255|HAMAP-Rule:MF_00108}.
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DR   EMBL; CP001616; ACQ94333.1; -; Genomic_DNA.
DR   RefSeq; WP_015879782.1; NC_012691.1.
DR   AlphaFoldDB; C4LBQ9; -.
DR   SMR; C4LBQ9; -.
DR   STRING; 595494.Tola_2740; -.
DR   EnsemblBacteria; ACQ94333; ACQ94333; Tola_2740.
DR   KEGG; tau:Tola_2740; -.
DR   eggNOG; COG1211; Bacteria.
DR   HOGENOM; CLU_061281_3_1_6; -.
DR   OMA; ERQHSVY; -.
DR   OrthoDB; 1836139at2; -.
DR   UniPathway; UPA00056; UER00093.
DR   Proteomes; UP000009073; Chromosome.
DR   GO; GO:0050518; F:2-C-methyl-D-erythritol 4-phosphate cytidylyltransferase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0019288; P:isopentenyl diphosphate biosynthetic process, methylerythritol 4-phosphate pathway; IEA:UniProtKB-UniPathway.
DR   GO; GO:0016114; P:terpenoid biosynthetic process; IEA:UniProtKB-UniRule.
DR   CDD; cd02516; CDP-ME_synthetase; 1.
DR   Gene3D; 3.90.550.10; -; 1.
DR   HAMAP; MF_00108; IspD; 1.
DR   InterPro; IPR001228; IspD.
DR   InterPro; IPR034683; IspD/TarI.
DR   InterPro; IPR018294; ISPD_synthase_CS.
DR   InterPro; IPR029044; Nucleotide-diphossugar_trans.
DR   Pfam; PF01128; IspD; 1.
DR   SUPFAM; SSF53448; SSF53448; 1.
DR   TIGRFAMs; TIGR00453; ispD; 1.
DR   PROSITE; PS01295; ISPD; 1.
PE   3: Inferred from homology;
KW   Isoprene biosynthesis; Nucleotidyltransferase; Reference proteome;
KW   Transferase.
FT   CHAIN           1..227
FT                   /note="2-C-methyl-D-erythritol 4-phosphate
FT                   cytidylyltransferase"
FT                   /id="PRO_1000202898"
FT   SITE            16
FT                   /note="Transition state stabilizer"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00108"
FT   SITE            23
FT                   /note="Transition state stabilizer"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00108"
FT   SITE            151
FT                   /note="Positions MEP for the nucleophilic attack"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00108"
FT   SITE            207
FT                   /note="Positions MEP for the nucleophilic attack"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00108"
SQ   SEQUENCE   227 AA;  24811 MW;  D26048414E383C98 CRC64;
     MQTFTAVVPA AGRGSRMQAN KPKQYLHLGD KTIIEHTLTR LLAHPQIEKI VVVIADDDHY
     FSSLPLANHP RIEVTLGGPE RAISVLNGLS SVETDWVLVH DAARPCITQS DLDALMAAAE
     LGEDGAILAV PVKDTMKRSD SQQRIEETVE RGHLWHALTP QMFPTQQLAD AIDAGLTQSI
     VLTDEASAME RAGFKPLLVA GRSDNIKVTR PEDLALAAFI LQQQELE