Protein: HPr kinase/phosphorylase (HPrK/P) (EC 2.7.11.-) (EC 2.7.4.-) (HPr kinase/phosphatase) (HPr(Ser) kinase/phosphorylase) (O34483)
Organism: Bacillus subtilis (strain 168)
Function: Catalyzes the ATP- as well as the pyrophosphate-dependent phosphorylation of 'Ser-45' in HPr, a phosphocarrier protein of the phosphoenolpyruvate-dependent sugar phosphotransferase system (PTS). HprK/P also catalyzes the pyrophosphate-producing, inorganic phosphate-dependent dephosphorylation (phosphorolysis) of seryl-phosphorylated HPr (P-Ser-HPr). The two antagonistic activities of HprK/P are regulated by several intracellular metabolites, which change their concentration in response to the absence or presence of rapidly metabolisable carbon sources (glucose, fructose, etc.) in the growth medium. Also phosphorylates/dephosphorylates the HPr-like catabolite repression protein crh on 'Ser-46'. Therefore, by controlling the phosphorylation state of HPr and crh, HPrK/P is a sensor enzyme that plays a major role in the regulation of carbon metabolism and sugar transport: it mediates carbon catabolite repression (CCR), and regulates PTS-catalyzed carbohydrate uptake and inducer exclusion.
Sequence: MAKVRTKDVMEQFNLELISGEEGINRPITMSDLSRPGIEIAGYFTYYPRERVQLLGKTELSFFEQLPEEEKKQRMDSLCTDVTPAIILSRDMPIPQELIDASEKNGVPVLRSPLKTTRLSSRLTNFLESRLAPTTAIHGVLVDIYGVGVLITGKSGVGKSETALELVKRGHRLVADDCVEIRQEDQDTLVGNAPELIEHLLEIRGLGIINVMTLFGAGAVRSNKRITIVMNLELWEQGKQYDRLGLEEETMKIIDTEITKLTIPVRPGRNLAVIIEVAAMNFRLKRMGLNAAEQFTNKLADVIEDGEQEE
InterPro domains: - IPR011104: HPr kinase/phosphorylase, C-terminal (domain) [130-298]
- IPR011126: HPr(Ser) kinase/phosphorylase, N-terminal (domain) [4-127]
- IPR027417: P-loop containing nucleoside triphosphate hydrolase (homologous_superfamily) [132-310]
- IPR028979: HPr(Ser) kinase/phosphorylase-like, N-terminal domain superfamily (homologous_superfamily) [1-131]
- IPR003755: HPr(Ser) kinase/phosphorylase (family) [3-306]
Interaction partners: - HPr-like protein Crh
- Phosphocarrier protein HPr
- DNA-binding transcriptional repressor ScoC
- Pyrophosphatase PpaX
- Phosphatidylglycerol--prolipoprotein diacylglyceryl transferase
- Phosphoenolpyruvate-protein phosphotransferase
- Catabolite control protein A
- Fructose-1,6-bisphosphatase class 3
- Uncharacterized membrane protein YvoD
- Serine/threonine-protein kinase PrkC
Gene Ontology annotations:
Molecular Function (MF): GO:0003674 (molecular function), GO:0005488 (binding), GO:0005515 (protein binding)
Biological Process (BP): GO:0008150 (biological process), GO:0008152 (metabolic process), GO:0009987 (cellular process), GO:0009058 (biosynthetic process), GO:0044237 (cellular metabolic process), GO:0044281 (small molecule metabolic process), GO:0006807 (nitrogen compound metabolic process), GO:0071704 (organic substance metabolic process), GO:0044238 (primary metabolic process), GO:1901360 (organic cyclic compound metabolic process), GO:1901564 (organonitrogen compound metabolic process), GO:1901576 (organic substance biosynthetic process), GO:0006139 (nucleobase-containing compound metabolic process), GO:0046483 (heterocycle metabolic process), GO:0055086 (nucleobase-containing small molecule metabolic process), GO:0019637 (organophosphate metabolic process), GO:0044249 (cellular biosynthetic process), GO:0006725 (cellular aromatic compound metabolic process), GO:0034641 (cellular nitrogen compound metabolic process), GO:1901135 (carbohydrate derivative metabolic process), GO:0006793 (phosphorus metabolic process), GO:1901566 (organonitrogen compound biosynthetic process), GO:1901362 (organic cyclic compound biosynthetic process), GO:0006753 (nucleoside phosphate metabolic process), GO:0019438 (aromatic compound biosynthetic process), GO:0019693 (ribose phosphate metabolic process), GO:0018130 (heterocycle biosynthetic process), GO:0090407 (organophosphate biosynthetic process), GO:0044271 (cellular nitrogen compound biosynthetic process), GO:0006796 (phosphate-containing compound metabolic process), GO:0072521 (purine-containing compound metabolic process), GO:1901137 (carbohydrate derivative biosynthetic process), GO:0034654 (nucleobase-containing compound biosynthetic process), GO:0009259 (ribonucleotide metabolic process), GO:0009141 (nucleoside triphosphate metabolic process), GO:0009117 (nucleotide metabolic process), GO:0046390 (ribose phosphate biosynthetic process), GO:0006163 (purine nucleotide metabolic process), GO:0072522 (purine-containing compound biosynthetic process), GO:1901293 (nucleoside phosphate biosynthetic process), GO:0009165 (nucleotide biosynthetic process), GO:0009144 (purine nucleoside triphosphate metabolic process), GO:0006164 (purine nucleotide biosynthetic process), GO:0009150 (purine ribonucleotide metabolic process), GO:0009260 (ribonucleotide biosynthetic process), GO:0009199 (ribonucleoside triphosphate metabolic process), GO:0009142 (nucleoside triphosphate biosynthetic process), GO:0009201 (ribonucleoside triphosphate biosynthetic process), GO:0009152 (purine ribonucleotide biosynthetic process), GO:0046034 (ATP metabolic process), GO:0009145 (purine nucleoside triphosphate biosynthetic process), GO:0009205 (purine ribonucleoside triphosphate metabolic process), GO:0006754 (ATP biosynthetic process), GO:0009206 (purine ribonucleoside triphosphate biosynthetic process)
Cellular Component (CC): GO:0005575 (cellular component), GO:0032991 (protein-containing complex)