Linked Life Data

16906144

Source:http://linkedlifedata.com/resource/pubmed/id/16906144

Statements in which the resource exists as a subject.
PredicateObject
rdf:type
lifeskim:mentions
pubmed:issue
9
pubmed:dateCreated
2006-9-1
pubmed:abstractText
The intracellular pathogen Legionella pneumophila avoids fusion with lysosomes and subverts membrane transport from the endoplasmic reticulum to create an organelle that supports bacterial replication. Transport of endoplasmic reticulum-derived vesicles to the Legionella-containing vacuole (LCV) requires bacterial proteins that are translocated into host cells by a type IV secretion apparatus called Dot/Icm. Recent observations have revealed recruitment of the host GTPase Rab1 to the LCV by a process requiring the Dot/Icm system. Here, a visual screen was used to identify L. pneumophila mutants with defects in Rab1 recruitment. One of the factors identified in this screen was DrrA, a new Dot/Icm substrate protein translocated into host cells. We show that DrrA is a potent and highly specific Rab1 guanine nucleotide-exchange factor (GEF). DrrA can disrupt Rab1-mediated secretory transport to the Golgi apparatus by competing with endogenous exchange factors to recruit and activate Rab1 on plasma membrane-derived organelles. These data establish that intracellular pathogens have the capacity to directly modulate the activation state of a specific member of the Rab family of GTPases and thus further our understanding of the mechanisms used by bacterial pathogens to manipulate host vesicular transport.
pubmed:grant
pubmed:language
eng
pubmed:journal
pubmed:citationSubset
IM
pubmed:chemical
pubmed:status
MEDLINE
pubmed:month
Sep
pubmed:issn
1465-7392
pubmed:author
pubmed:issnType
Print
pubmed:volume
8
pubmed:owner
NLM
pubmed:authorsComplete
Y
pubmed:pagination
971-7
pubmed:dateRevised
2011-11-3
pubmed:meshHeading
pubmed:year
2006
pubmed:articleTitle
The Legionella pneumophila effector protein DrrA is a Rab1 guanine nucleotide-exchange factor.
pubmed:affiliation
Section of Microbial Pathogenesis, Yale University School of Medicine, Boyer Center for Molecular Medicine, 295 Congress Avenue, New Haven, CT 06536, USA.
pubmed:publicationType
Journal Article, Research Support, U.S. Gov't, Non-P.H.S., Research Support, Non-U.S. Gov't, Research Support, N.I.H., Extramural