Download MendeleyThe structure of enzyme IIAlactose from Lactococcus lactis reveals a new fold and points to possible interactions of a multicomponent system.
Sliz, P., Engelmann, R., Hengstenberg, W., Pai, E.F.(1997) Structure 5: 775-788
- PubMed: 9261069
- DOI: https://doi.org/10.1016/s0969-2126(97)00232-3
- Primary Citation of Related Structures:
1E2A - PubMed Abstract:
The bacterial phosphoenolpyruvate: sugar phosphotransferase system (PTS) is responsible for the binding, transmembrane transport and phosphorylation of numerous sugar substrates. The system is also involved in the regulation of a variety of metabolic and transcriptional processes. The PTS consists of two non-specific energy coupling components, enzyme I and a heat stable phosphocarrier protein (HPr), as well as several sugar-specific multiprotein permeases known as enzymes II. In most cases, enzymes IIA and IIB are located in the cytoplasm, while enzyme IIC acts as a membrane channel. Enzyme IIAlactose belongs to the lactose/cellobiose-specific family of enzymes II, one of four functionally and structurally distinct groups. The protein, which normally functions as a trimer, is believed to separate into its subunits after phosphorylation.
Organizational Affiliation:
Department of Biochemistry, University of Toronto, ON, Canada.
