Related Experiment Video
Updated: May 7, 2026

Isolation of Physiologically Active Thylakoids and Their Use in Energy-Dependent Protein Transport Assays
Published on: September 28, 2018
A regulatory domain controls the transport activity of a twin-arginine signal peptide
Lisa Bowman1, Tracy Palmer, Frank Sargent
1College of Life Sciences, University of Dundee, Dundee DD1 5EH, Scotland, UK.
Abstract:
The twin-arginine translocation (Tat) pathway is used by bacteria for the transmembrane transport of folded proteins. Proteins are targeted to the Tat translocase by signal peptides that have common tripartite structures consisting of polar n-regions, hydrophobic h-regions, and polar c-regions. In this work, the signal peptide of [NiFe] hydrogenase-1 from Escherichia coli has been studied. The hydrogenase-1 signal peptide contains an extended n-region that has a conserved primary structure. Genetic and biochemical approaches reveal that the signal peptide n-region is essential for hydrogenase assembly and acts as a regulatory domain controlling transport activity of the signal peptide.
Related Concept Videos
Bacterial Translocation and Protein Secretion
Insertion of Single-pass Transmembrane Proteins in the RER
Integral transmembrane proteins possess transmembrane and extra membrane domains. The transmembrane domains are primarily made of 20-25 hydrophobic amino acids arranged in a helical secondary confirmation. These...
Regulated mRNA Transport
Regulated mRNA Transport
Protein Transport to the Thylakoids
Regulation of Nuclear Protein Sorting

