ID   ISPD_SHESH              Reviewed;         234 AA.
AC   A8FST0;
DT   20-MAY-2008, integrated into UniProtKB/Swiss-Prot.
DT   13-NOV-2007, sequence version 1.
DT   03-AUG-2022, entry version 79.
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=Ssed_1292;
OS   Shewanella sediminis (strain HAW-EB3).
OC   Bacteria; Proteobacteria; Gammaproteobacteria; Alteromonadales;
OC   Shewanellaceae; Shewanella.
OX   NCBI_TaxID=425104;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=HAW-EB3;
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Barry K., Glavina del Rio T., Dalin E.,
RA   Tice H., Pitluck S., Chertkov O., Brettin T., Bruce D., Detter J.C.,
RA   Han C., Schmutz J., Larimer F., Land M., Hauser L., Kyrpides N., Kim E.,
RA   Zhao J.-S., Richardson P.;
RT   "Complete sequence of Shewanella sediminis HAW-EB3.";
RL   Submitted (AUG-2007) 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; CP000821; ABV35903.1; -; Genomic_DNA.
DR   RefSeq; WP_012141639.1; NC_009831.1.
DR   AlphaFoldDB; A8FST0; -.
DR   SMR; A8FST0; -.
DR   STRING; 425104.Ssed_1292; -.
DR   EnsemblBacteria; ABV35903; ABV35903; Ssed_1292.
DR   KEGG; sse:Ssed_1292; -.
DR   eggNOG; COG1211; Bacteria.
DR   HOGENOM; CLU_061281_3_1_6; -.
DR   OMA; ERQHSVY; -.
DR   OrthoDB; 1836139at2; -.
DR   UniPathway; UPA00056; UER00093.
DR   Proteomes; UP000002015; 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; IPR029044; Nucleotide-diphossugar_trans.
DR   Pfam; PF01128; IspD; 1.
DR   SUPFAM; SSF53448; SSF53448; 1.
DR   TIGRFAMs; TIGR00453; ispD; 1.
PE   3: Inferred from homology;
KW   Isoprene biosynthesis; Nucleotidyltransferase; Transferase.
FT   CHAIN           1..234
FT                   /note="2-C-methyl-D-erythritol 4-phosphate
FT                   cytidylyltransferase"
FT                   /id="PRO_1000075945"
FT   SITE            20
FT                   /note="Transition state stabilizer"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00108"
FT   SITE            27
FT                   /note="Transition state stabilizer"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00108"
FT   SITE            156
FT                   /note="Positions MEP for the nucleophilic attack"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00108"
FT   SITE            212
FT                   /note="Positions MEP for the nucleophilic attack"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00108"
SQ   SEQUENCE   234 AA;  25272 MW;  46813BFE30735F78 CRC64;
     MNDSQDKIVA IVPAAGIGSR MGAEIPKQYL LIDEKTILQL TLELLLTHPK IDCVVVALHP
     EDQFFKGLPL SSHHKLHTVV GGSERADSVL ACLNHLGGDC WAMVHDAARP CLTHGDIDKL
     IASRQRFPQG AILAAPVRDT MKRGNADGTV KETVCRERLW HALTPQLFPA ALLKGNLEQA
     LAQGANITDE ASAMEWAGVS PGLVDGRVDN IKITHPDDLL LAGLFLGNAH SLER