ID   ISPD_RUBXD              Reviewed;         231 AA.
AC   Q1AU08;
DT   26-FEB-2008, integrated into UniProtKB/Swiss-Prot.
DT   11-JUL-2006, sequence version 1.
DT   25-MAY-2022, entry version 87.
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=Rxyl_2176;
OS   Rubrobacter xylanophilus (strain DSM 9941 / NBRC 16129 / PRD-1).
OC   Bacteria; Actinobacteria; Rubrobacteria; Rubrobacterales; Rubrobacteraceae;
OC   Rubrobacter.
OX   NCBI_TaxID=266117;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=DSM 9941 / NBRC 16129 / PRD-1;
RG   US DOE Joint Genome Institute;
RA   Copeland A., Lucas S., Lapidus A., Barry K., Detter J.C.,
RA   Glavina del Rio T., Hammon N., Israni S., Dalin E., Tice H., Pitluck S.,
RA   Munk A.C., Brettin T., Bruce D., Han C., Tapia R., Gilna P., Schmutz J.,
RA   Larimer F., Land M., Hauser L., Kyrpides N., Lykidis A., da Costa M.S.,
RA   Rainey F.A., Empadinhas N., Jolivet E., Battista J.R., Richardson P.;
RT   "Complete sequence of Rubrobacter xylanophilus DSM 9941.";
RL   Submitted (JUN-2006) 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; CP000386; ABG05120.1; -; Genomic_DNA.
DR   RefSeq; WP_011565134.1; NC_008148.1.
DR   AlphaFoldDB; Q1AU08; -.
DR   SMR; Q1AU08; -.
DR   STRING; 266117.Rxyl_2176; -.
DR   EnsemblBacteria; ABG05120; ABG05120; Rxyl_2176.
DR   KEGG; rxy:Rxyl_2176; -.
DR   eggNOG; COG1211; Bacteria.
DR   HOGENOM; CLU_061281_2_2_11; -.
DR   OMA; TDACKIL; -.
DR   PhylomeDB; Q1AU08; -.
DR   UniPathway; UPA00056; UER00093.
DR   Proteomes; UP000006637; 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; Reference proteome;
KW   Transferase.
FT   CHAIN           1..231
FT                   /note="2-C-methyl-D-erythritol 4-phosphate
FT                   cytidylyltransferase"
FT                   /id="PRO_1000071320"
FT   SITE            16
FT                   /note="Transition state stabilizer"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_00108"
FT   SITE            21
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   231 AA;  24800 MW;  29F52DEE1372584D CRC64;
     MSGAVALVLA GGSGTRMGRP KQFIELLGRP ALYHTLRAFQ EAREVERIYA VGEEERIRDL
     ASGCGIDKLC GCARPGESRA LSARNGLLLC GEEDGVICLI HDGSRCLVTP QLIGRVVRAV
     EEGADGAIPA VPVPDTIKVA DGERVLKTLD RSSLRAAQTP QAFRLGLLRR VFSAPEEVLR
     EATDDASLVE RAGGEVRLVP GERTNIKLTS PEDLVLAEAI LAARERRGSR L