PTS

The PEP:Sugar Phosphotransferase System

The PTS is a sugar transport system that couples the transport of a sugar to its phosphorylation. The phosphate group is derived from phosphoenolpyruvate (PEP) and transferred via the general PTS proteins Enzyme I (EI) and HPr to the substrate-specific Enzymes II (EII) to the incoming sugars.

In addition to its role in sugar transport, the PTS is also involved in the regulation of carbon metabolism.

General PTS proteins

• Enzyme I
• HPr

Sugar specific PTS proteins

• PtsG: glucose permease, EIICBA
• GamP: glucosamine permease, EIICBA
• MurP: N-acetyl muramic acid-specific phosphotransferase system, EIIBC component
• MtlA: mannitol permease
• GmuA, GmuB, GmuC: galactomannan permease
• TreP: trehalose permease
• MalP: maltose permease
• FruA: fructose permease
• ManP: mannose permease
• YpqE: unknown EIIA component
• LevD, LevE, LevF, LevG: fructose permease
• SacP: sucrose permease (high affinity)
• SacY: sucrose permease (low affinity)
• LicA, LicB, LicC: lichenan permease
• BglP: ß-glucoside permease
• YyzE: unknown PTS protein
• MtlF
• YwbA: unknown EIIC component

Proteins closely related to the PTS

• Crh: HPr-like protein with exculsively regulatory functions (His-15 is not conserved
• HprK: HPr-kinase, key factor for carbon catabolite repression

Non-PTS proteins controlled by PTS-dependent phosphorylation

• PRD-containing transcription factors
• GlpK

The PTS in SubtiPathways

• Central C-metabolism
• Sugar catabolism

Related Lists

• PRD-containing transcription factors
• trigger enzymes

Relevant Reviews

Josef Deutscher, Christof Francke, Pieter W Postma
How phosphotransferase system-related protein phosphorylation regulates carbohydrate metabolism in bacteria.
Microbiol Mol Biol Rev: 2006, 70(4);939-1031
[PubMed:17158705] [WorldCat.org] [DOI] (P p)

Jonathan Reizer, Steffi Bachem, Aiala Reizer, Maryvonne Arnaud, Milton H Saier, Jörg Stülke
Novel phosphotransferase system genes revealed by genome analysis - the complete complement of PTS proteins encoded within the genome of Bacillus subtilis.
Microbiology (Reading): 1999, 145 ( Pt 12);3419-3429
[PubMed:10627040] [WorldCat.org] [DOI] (P p)

J Stülke, W Hillen
Coupling physiology and gene regulation in bacteria: the phosphotransferase sugar uptake system delivers the signals.
Naturwissenschaften: 1998, 85(12);583-92
[PubMed:9871918] [WorldCat.org] [DOI] (P p)

J Stülke, M Arnaud, G Rapoport, I Martin-Verstraete
PRD--a protein domain involved in PTS-dependent induction and carbon catabolite repression of catabolic operons in bacteria.
Mol Microbiol: 1998, 28(5);865-74
[PubMed:9663674] [WorldCat.org] [DOI] (P p)