Conserved Protein Domain Family
PL_Passenger_AT

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cl00185: PL_Passenger_AT Superfamily 
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Pertactin-like passenger domains (virulence factors) of autotransporter proteins of the type V secretion system. Autotransporters are proteins used by Gram-negative bacteria to transport proteins across their outer membranes. The C-terminal (beta) domain of autotransporters forms a pore in the outer membrane through which the N-terminal passenger domain is transported. Following transport, the passenger domain is generally cleaved by an outer membrane protease with the passenger domain either remaining in contact with the surface via a noncovalent interaction with the beta domain or cleaved to release a soluble protein. These proteins are highly diverse and perform a variety of functions that promote virulence, including catalyzing proteolysis, serving as an adhesin, mediating actin-promoted motility, or serving as a cytotoxin. Proteins in this family share similarity in the C-terminal region of the passenger domain as seen in the pertactin structure P.69, a Bordetella pertussis agglutinogen responsible for human pertussis. The P.69 protein consists of a 16-stranded parallel beta-helix with a V-shaped cross-section, and is one of the largest beta-helix known to date.
Links
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Taxonomy: root
PubMed: 12 links
Protein: Related Protein
Related Structure
Statistics
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Accession: cl00185
PSSM Id: 320803
Name: PL_Passenger_AT
Created: 8-Feb-2008
Updated: 19-Sep-2018
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