Two-step and one-step secretion mechanisms in gram-negative bacteria: contrasting the type IV secretion system and the chaperone-usher pathway of pilus biogenesis
Rego, A.T. and Chandran, Vidya and Waksman, Gabriel (2010) Two-step and one-step secretion mechanisms in gram-negative bacteria: contrasting the type IV secretion system and the chaperone-usher pathway of pilus biogenesis. Biochemical Journal 425 , pp. 475-488. ISSN 0264-6021.
Gram-negative bacteria have evolved diverse secretion systems/machineries to translocate substrates across the cell envelope. These various machineries fulfil a wide variety of functions but are also essential for pathogenic bacteria to infect human or plant cells. Secretion systems, of which there are seven, utilize one of two secretion mechanisms: (i) the one-step mechanism, whereby substrates are translocated directly from the bacterial cytoplasm to the extracellular medium or into the eukaryotic target cell; (ii) the two-step mechanism, whereby substrates are first translocated across the bacterial inner membrane; once in the periplasm, substrates are targeted to one of the secretion systems that mediate transport across the outer membrane and released outside the bacterial cell. The present review provides an example for each of these two classes of secretion systems and contrasts the various solutions evolved to secrete substrates.
|Keyword(s) / Subject(s):||Chaperone-usher, protein secretion, structural biology, type IV secretion, virulence factor|
|School:||Birkbeck Schools and Departments > School of Science > Biological Sciences|
|Research Centre:||Structural Molecular Biology, Institute of (ISMB)|
|Date Deposited:||04 Aug 2010 14:09|
|Last Modified:||06 Dec 2016 10:46|
Additional statistics are available via IRStats2.