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HPRK_PEPAC
ID   HPRK_PEPAC              Reviewed;         308 AA.
AC   Q93SG0;
DT   10-MAY-2004, integrated into UniProtKB/Swiss-Prot.
DT   01-DEC-2001, sequence version 1.
DT   03-AUG-2022, entry version 77.
DE   RecName: Full=HPr kinase/phosphorylase {ECO:0000255|HAMAP-Rule:MF_01249};
DE            Short=HPrK/P {ECO:0000255|HAMAP-Rule:MF_01249};
DE            EC=2.7.11.- {ECO:0000255|HAMAP-Rule:MF_01249};
DE            EC=2.7.4.- {ECO:0000255|HAMAP-Rule:MF_01249};
DE   AltName: Full=HPr(Ser) kinase/phosphorylase {ECO:0000255|HAMAP-Rule:MF_01249};
GN   Name=hprK {ECO:0000255|HAMAP-Rule:MF_01249};
OS   Peptoclostridium acidaminophilum (Eubacterium acidaminophilum).
OC   Bacteria; Firmicutes; Clostridia; Eubacteriales; Peptostreptococcaceae;
OC   Peptoclostridium.
OX   NCBI_TaxID=1731;
RN   [1]
RP   NUCLEOTIDE SEQUENCE [GENOMIC DNA].
RC   STRAIN=ATCC 49065 / DSM 3953 / al-2;
RX   PubMed=12560990; DOI=10.1007/s00203-002-0508-1;
RA   Graentzdoerffer A., Rauh D., Pich A., Andreesen J.R.;
RT   "Molecular and biochemical characterization of two tungsten- and selenium-
RT   containing formate dehydrogenases from Eubacterium acidaminophilum that are
RT   associated with components of an iron-only hydrogenase.";
RL   Arch. Microbiol. 179:116-130(2003).
CC   -!- FUNCTION: Catalyzes the ATP- as well as the pyrophosphate-dependent
CC       phosphorylation of a specific serine residue in HPr, a phosphocarrier
CC       protein of the phosphoenolpyruvate-dependent sugar phosphotransferase
CC       system (PTS). HprK/P also catalyzes the pyrophosphate-producing,
CC       inorganic phosphate-dependent dephosphorylation (phosphorolysis) of
CC       seryl-phosphorylated HPr (P-Ser-HPr). The two antagonistic activities
CC       of HprK/P are regulated by several intracellular metabolites, which
CC       change their concentration in response to the absence or presence of
CC       rapidly metabolisable carbon sources (glucose, fructose, etc.) in the
CC       growth medium. Therefore, by controlling the phosphorylation state of
CC       HPr, HPrK/P is a sensor enzyme that plays a major role in the
CC       regulation of carbon metabolism and sugar transport: it mediates carbon
CC       catabolite repression (CCR), and regulates PTS-catalyzed carbohydrate
CC       uptake and inducer exclusion. {ECO:0000255|HAMAP-Rule:MF_01249}.
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=[HPr protein]-L-serine + ATP = [HPr protein]-O-phospho-L-
CC         serine + ADP + H(+); Xref=Rhea:RHEA:46600, Rhea:RHEA-COMP:11602,
CC         Rhea:RHEA-COMP:11603, ChEBI:CHEBI:15378, ChEBI:CHEBI:29999,
CC         ChEBI:CHEBI:30616, ChEBI:CHEBI:83421, ChEBI:CHEBI:456216;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01249};
CC   -!- CATALYTIC ACTIVITY:
CC       Reaction=[HPr protein]-O-phospho-L-serine + H(+) + phosphate = [HPr
CC         protein]-L-serine + diphosphate; Xref=Rhea:RHEA:46604, Rhea:RHEA-
CC         COMP:11602, Rhea:RHEA-COMP:11603, ChEBI:CHEBI:15378,
CC         ChEBI:CHEBI:29999, ChEBI:CHEBI:33019, ChEBI:CHEBI:43474,
CC         ChEBI:CHEBI:83421; Evidence={ECO:0000255|HAMAP-Rule:MF_01249};
CC   -!- COFACTOR:
CC       Name=Mg(2+); Xref=ChEBI:CHEBI:18420;
CC         Evidence={ECO:0000255|HAMAP-Rule:MF_01249};
CC   -!- SUBUNIT: Homohexamer. {ECO:0000255|HAMAP-Rule:MF_01249}.
CC   -!- DOMAIN: The Walker A ATP-binding motif also binds Pi and PPi.
CC       {ECO:0000255|HAMAP-Rule:MF_01249}.
CC   -!- MISCELLANEOUS: Both phosphorylation and phosphorolysis are carried out
CC       by the same active site and suggest a common mechanism for both
CC       reactions. {ECO:0000255|HAMAP-Rule:MF_01249}.
CC   -!- SIMILARITY: Belongs to the HPrK/P family. {ECO:0000255|HAMAP-
CC       Rule:MF_01249}.
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DR   EMBL; AJ312124; CAC39228.1; -; Genomic_DNA.
DR   AlphaFoldDB; Q93SG0; -.
DR   SMR; Q93SG0; -.
DR   GO; GO:0005524; F:ATP binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0000287; F:magnesium ion binding; IEA:UniProtKB-UniRule.
DR   GO; GO:0000155; F:phosphorelay sensor kinase activity; IEA:InterPro.
DR   GO; GO:0004674; F:protein serine/threonine kinase activity; IEA:UniProtKB-KW.
DR   GO; GO:0004712; F:protein serine/threonine/tyrosine kinase activity; IEA:UniProtKB-UniRule.
DR   GO; GO:0005975; P:carbohydrate metabolic process; IEA:UniProtKB-KW.
DR   GO; GO:0006109; P:regulation of carbohydrate metabolic process; IEA:UniProtKB-UniRule.
DR   CDD; cd01918; HprK_C; 1.
DR   Gene3D; 3.40.1390.20; -; 1.
DR   Gene3D; 3.40.50.300; -; 1.
DR   HAMAP; MF_01249; HPr_kinase; 1.
DR   InterPro; IPR003755; HPr(Ser)_kin/Pase.
DR   InterPro; IPR011104; Hpr_kin/Pase_C.
DR   InterPro; IPR011126; Hpr_kin/Pase_Hpr_N.
DR   InterPro; IPR027417; P-loop_NTPase.
DR   InterPro; IPR028979; Ser_kin/Pase_Hpr-like_N_sf.
DR   PANTHER; PTHR30305:SF1; PTHR30305:SF1; 1.
DR   Pfam; PF07475; Hpr_kinase_C; 1.
DR   Pfam; PF02603; Hpr_kinase_N; 1.
DR   SUPFAM; SSF75138; SSF75138; 1.
DR   TIGRFAMs; TIGR00679; hpr-ser; 1.
PE   3: Inferred from homology;
KW   ATP-binding; Carbohydrate metabolism; Kinase; Magnesium; Metal-binding;
KW   Multifunctional enzyme; Nucleotide-binding;
KW   Serine/threonine-protein kinase; Transferase.
FT   CHAIN           1..308
FT                   /note="HPr kinase/phosphorylase"
FT                   /id="PRO_0000058956"
FT   REGION          204..213
FT                   /note="Important for the catalytic mechanism of both
FT                   phosphorylation and dephosphorylation"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01249"
FT   REGION          267..272
FT                   /note="Important for the catalytic mechanism of
FT                   dephosphorylation"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01249"
FT   ACT_SITE        141
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01249"
FT   ACT_SITE        162
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01249"
FT   ACT_SITE        180
FT                   /note="Proton acceptor; for phosphorylation activity.
FT                   Proton donor; for dephosphorylation activity"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01249"
FT   ACT_SITE        246
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01249"
FT   BINDING         156..163
FT                   /ligand="ATP"
FT                   /ligand_id="ChEBI:CHEBI:30616"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01249"
FT   BINDING         163
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01249"
FT   BINDING         205
FT                   /ligand="Mg(2+)"
FT                   /ligand_id="ChEBI:CHEBI:18420"
FT                   /evidence="ECO:0000255|HAMAP-Rule:MF_01249"
SQ   SEQUENCE   308 AA;  34967 MW;  8D65ED7137E6765D CRC64;
     MTEDKKVSVS MFIKELELEV VHKGENTDYE IISSDINRPA LQFAGFFEHF AYDRVQVIGK
     GEHDYFGTLD RATRLRRLEK LFSYEIPVLV LARGLDFSSD TINMAKKYNR IIIRSQMSTT
     KFINKASGYL SEKLAPSKTV HGVLVDIYGI GVLLMGKSGV GKSETALELV KRGHRLVADD
     AVEIRRIEDD MLVGEAPDIL KYLMEIRGVG ILDIKNLYGV GAIRTNKVVE MVAELEYWEE
     GKYYDRLGID EEYMTLLDVP VEKIVIPVKP GRNLAMIIEV AAKNYRQKNM GYNAAKIFNE
     KLLKKLSD
 
 
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