ID   PT1_CHLTR               Reviewed;         571 AA.
AC   O84340;
DT   01-JUN-2001, integrated into UniProtKB/Swiss-Prot.
DT   01-NOV-1998, sequence version 1.
DT   03-AUG-2022, entry version 121.
DE   RecName: Full=Phosphoenolpyruvate-protein phosphotransferase {ECO:0000250|UniProtKB:P08839};
DE            EC=2.7.3.9 {ECO:0000250|UniProtKB:P08839};
DE   AltName: Full=Phosphotransferase system, enzyme I {ECO:0000250|UniProtKB:P08839};
GN   Name=ptsI; OrderedLocusNames=CT_336;
OS   Chlamydia trachomatis (strain D/UW-3/Cx).
OC   Bacteria; Chlamydiae; Chlamydiales; Chlamydiaceae;
OC   Chlamydia/Chlamydophila group; Chlamydia.
OX   NCBI_TaxID=272561;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [LARGE SCALE GENOMIC DNA].
RC   STRAIN=D/UW-3/Cx;
RX   PubMed=9784136; DOI=10.1126/science.282.5389.754;
RA   Stephens R.S., Kalman S., Lammel C.J., Fan J., Marathe R., Aravind L.,
RA   Mitchell W.P., Olinger L., Tatusov R.L., Zhao Q., Koonin E.V., Davis R.W.;
RT   "Genome sequence of an obligate intracellular pathogen of humans: Chlamydia
RT   trachomatis.";
RL   Science 282:754-759(1998).
CC   -!- FUNCTION: General (non sugar-specific) component of the
CC       phosphoenolpyruvate-dependent sugar phosphotransferase system (sugar
CC       PTS). This major carbohydrate active-transport system catalyzes the
CC       phosphorylation of incoming sugar substrates concomitantly with their
CC       translocation across the cell membrane. Enzyme I transfers the
CC       phosphoryl group from phosphoenolpyruvate (PEP) to the phosphoryl
CC       carrier protein (HPr). {ECO:0000250|UniProtKB:P08839}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=L-histidyl-[protein] + phosphoenolpyruvate = N(pros)-phospho-
CC         L-histidyl-[protein] + pyruvate; Xref=Rhea:RHEA:23880, Rhea:RHEA-
CC         COMP:9745, Rhea:RHEA-COMP:9746, ChEBI:CHEBI:15361, ChEBI:CHEBI:29979,
CC         ChEBI:CHEBI:58702, ChEBI:CHEBI:64837; EC=2.7.3.9;
CC         Evidence={ECO:0000250|UniProtKB:P08839};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC         Evidence={ECO:0000250|UniProtKB:P08839};
CC   -!- SUBUNIT: Homodimer. {ECO:0000250|UniProtKB:P08839}.
CC   -!- SUBCELLULAR LOCATION: Cytoplasm {ECO:0000305}.
CC   -!- DOMAIN: The N-terminal domain contains the HPr binding site, the
CC       central domain the pyrophosphate/phosphate carrier histidine, and the
CC       C-terminal domain the pyruvate binding site.
CC       {ECO:0000250|UniProtKB:P08839}.
CC   -!- MISCELLANEOUS: The reaction takes place in three steps, mediated by a
CC       phosphocarrier histidine residue located on the surface of the central
CC       domain. The two first partial reactions are catalyzed at an active site
CC       located on the N-terminal domain, and the third partial reaction is
CC       catalyzed at an active site located on the C-terminal domain. For
CC       catalytic turnover, the central domain swivels from the concave surface
CC       of the N-terminal domain to that of the C-terminal domain.
CC       {ECO:0000250|UniProtKB:P08839}.
CC   -!- SIMILARITY: Belongs to the PEP-utilizing enzyme family. {ECO:0000305}.
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DR   EMBL; AE001273; AAC67931.1; -; Genomic_DNA.
DR   PIR; C71528; C71528.
DR   RefSeq; NP_219843.1; NC_000117.1.
DR   RefSeq; WP_009871686.1; NC_000117.1.
DR   AlphaFoldDB; O84340; -.
DR   SMR; O84340; -.
DR   STRING; 813.O172_01830; -.
DR   EnsemblBacteria; AAC67931; AAC67931; CT_336.
DR   GeneID; 884783; -.
DR   KEGG; ctr:CT_336; -.
DR   PATRIC; fig|272561.5.peg.362; -.
DR   HOGENOM; CLU_007308_7_0_0; -.
DR   InParanoid; O84340; -.
DR   OMA; CNAEWAL; -.
DR   Proteomes; UP000000431; Chromosome.
DR   GO; GO:0005737; C:cytoplasm; IEA:UniProtKB-SubCell.
DR   GO; GO:0016301; F:kinase activity; IEA:UniProtKB-KW.
DR   GO; GO:0046872; F:metal ion binding; IEA:UniProtKB-KW.
DR   GO; GO:0008965; F:phosphoenolpyruvate-protein phosphotransferase activity; IEA:UniProtKB-EC.
DR   GO; GO:0009401; P:phosphoenolpyruvate-dependent sugar phosphotransferase system; IEA:UniProtKB-KW.
DR   GO; GO:0016310; P:phosphorylation; IEA:UniProtKB-KW.
DR   Gene3D; 1.10.274.10; -; 1.
DR   Gene3D; 3.20.20.60; -; 1.
DR   InterPro; IPR008279; PEP-util_enz_mobile_dom.
DR   InterPro; IPR000121; PEP_util_C.
DR   InterPro; IPR023151; PEP_util_CS.
DR   InterPro; IPR036637; Phosphohistidine_dom_sf.
DR   InterPro; IPR006318; PTS_EI-like.
DR   InterPro; IPR008731; PTS_EIN.
DR   InterPro; IPR036618; PtsI_HPr-bd_sf.
DR   InterPro; IPR015813; Pyrv/PenolPyrv_Kinase-like_dom.
DR   InterPro; IPR040442; Pyrv_Kinase-like_dom_sf.
DR   Pfam; PF05524; PEP-utilisers_N; 1.
DR   Pfam; PF00391; PEP-utilizers; 1.
DR   Pfam; PF02896; PEP-utilizers_C; 1.
DR   SUPFAM; SSF47831; SSF47831; 1.
DR   SUPFAM; SSF51621; SSF51621; 1.
DR   SUPFAM; SSF52009; SSF52009; 1.
DR   TIGRFAMs; TIGR01417; PTS_I_fam; 1.
DR   PROSITE; PS00742; PEP_ENZYMES_2; 1.
PE   3: Inferred from homology;
KW   Cytoplasm; Kinase; Magnesium; Metal-binding; Phosphotransferase system;
KW   Reference proteome; Sugar transport; Transferase; Transport.
FT   CHAIN           1..571
FT                   /note="Phosphoenolpyruvate-protein phosphotransferase"
FT                   /id="PRO_0000147066"
FT   ACT_SITE        207
FT                   /note="Tele-phosphohistidine intermediate"
FT                   /evidence="ECO:0000250|UniProtKB:P08839"
FT   ACT_SITE        506
FT                   /note="Proton donor"
FT                   /evidence="ECO:0000250|UniProtKB:P08839"
FT   BINDING         312
FT                   /ligand="phosphoenolpyruvate"
FT                   /ligand_id="ChEBI:CHEBI:58702"
FT                   /evidence="ECO:0000250|UniProtKB:P23533"
FT   BINDING         348
FT                   /ligand="phosphoenolpyruvate"
FT                   /ligand_id="ChEBI:CHEBI:58702"
FT                   /evidence="ECO:0000250|UniProtKB:P08839"
FT   BINDING         435
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000250|UniProtKB:P08839"
FT   BINDING         458..459
FT                   /ligand="phosphoenolpyruvate"
FT                   /ligand_id="ChEBI:CHEBI:58702"
FT                   /evidence="ECO:0000250|UniProtKB:P08839"
FT   BINDING         459
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000250|UniProtKB:P08839"
FT   BINDING         469
FT                   /ligand="phosphoenolpyruvate"
FT                   /ligand_id="ChEBI:CHEBI:58702"
FT                   /evidence="ECO:0000250|UniProtKB:P23533"
SQ   SEQUENCE   571 AA;  63787 MW;  73EBFEEE7C457067 CRC64;
     MSVTGQDNKE LQQEFVIVGE PIVPGIGLGK ALLLGKSSLR IRELTLPQEE VEHEISRYYK
     ALKRSRSDLA ALEKEAKGKQ GYQEIASILQ AHLEIIKDPL LTEEVVKTIR KDRKNAEFVF
     SSVMGEIEKS LCAVQKTTAT RVDRVQDIHD ISNRVIGHLC CQHKSSLGEF DQNLIVFSEE
     LTPSEAANAN PEYIRGFVSL EGAKTSHTAI VSLAKNIPYV ANFTTELWDT IKEFSGTLVL
     INGDKGEITF NPQLSTIQTY YRKQASVSVT VPVQVQTGKN LPLISLSAQI VSTEELPMIE
     RESPGTSVGL FRSEFMAFSL GRLPCVEEQA DQYAQLVQFQ CSDIHVLRLF DFGEDKECPC
     ISSSHRSVRW LLEQEKVLKE QLQAIAIVSR IGRLKVLIPG VIDASEIALV KRLFQEEIRL
     LKGISENILW GSMIEIPSAV WMIEEILQES SFVALGTNDL AQYTLGTSRE RSLLGERSRV
     PHPSVIRMIH HVVEQAKQKN VPVSVCGEMA GDPALLPMFL GLGVKELSAV IPAINSLKMR
     LLDLNSRECS RLTKQLLRAK TYEEVHQLLY V