title: Bacterial injectisomes: needle length does matter.
abstract: Many pathogenic bacteria use a type III secretion nanomachine (an injectisome) to deliver virulence proteins into the cytosol of their eukaryotic host cells. Most injectisomes possess a stiff needlelike structure of a genetically defined length. We found that a minimal needle length was required for efficient functioning of the Yersinia enterocolitica injectisome. This minimal needle length correlated with the length of the major adhesin at the bacterial surface. The needle may be required for triggering type III secretion, and its length may have evolved to match specific structures at the bacterial and host cell surfaces.
authors.affiliation: Biozentrum, Universität Basel, 4056 Basel, Switzerland.
authors.forename: Luís Jaime
authors.initials: LJ
authors.lastname: Mota
authors.forename: Laure
authors.initials: L
authors.lastname: Journet
authors.forename: Isabel
authors.initials: I
authors.lastname: Sorg
authors.forename: Céline
authors.initials: C
authors.lastname: Agrain
authors.forename: Guy R
authors.initials: GR
authors.lastname: Cornelis
mesh_terms: D018829:Adhesins, Bacterial / Q000737:chemistry / Q000378:metabolism*; D000818:Animals; D001425:Bacterial Outer Membrane Proteins / Q000378:metabolism; D001426:Bacterial Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D002460:Cell Line; D008264:Macrophages / Q000378:metabolism / Q000382:microbiology; D051379:Mice; D010957:Plasmids; D017346:Protein Serine-Threonine Kinases / Q000378:metabolism; D014774:Virulence; D037521:Virulence Factors / Q000378:metabolism; D015008:Yersinia enterocolitica / Q000235:genetics / Q000378:metabolism* / Q000472:pathogenicity*
chemical_list: D018829:Adhesins, Bacterial; D001425:Bacterial Outer Membrane Proteins; D001426:Bacterial Proteins; D037521:Virulence Factors; C064832:YadA protein, Yersinia; C109227:YopP protein, Yersinia; C479925:YscP protein, Yersinia enterocolitica; C063239:yopE protein, Yersinia; C415206:YopO protein, Yersinia enterocolitica; D017346:Protein Serine-Threonine Kinases