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TitleStructure of the dodecameric Yersinia enterocolitica secretin YscC and its trypsin-resistant core.
Journal, issue, pagesStructure, Vol. 21, Issue 12, Page 2152-2161, Year 2013
Publish dateDec 3, 2013
AuthorsJulia Kowal / Mohamed Chami / Philippe Ringler / Shirley A Müller / Mikhail Kudryashev / Daniel Castaño-Díez / Marlise Amstutz / Guy R Cornelis / Henning Stahlberg / Andreas Engel /
PubMed AbstractThe type III secretion system machinery, also known as the injectisome, delivers bacterial effector proteins into eukaryotic cells during infection. The outer membrane YscC secretin is a major part ...The type III secretion system machinery, also known as the injectisome, delivers bacterial effector proteins into eukaryotic cells during infection. The outer membrane YscC secretin is a major part of Yersinia enterocolitica's injectisome and is among the first components to assemble, solely assisted by its pilotin, YscW. We have determined the three-dimensional structures of the native complex and its protease-resistant core to 12 Å resolution by cryo-electron microscopy (cryo-EM) and show that YscC forms a dodecameric complex. Cryo-EM of YscC reconstituted into proteoliposomes defines the secretin's membrane-spanning region. Native YscC consists of an outer membrane ring connected via a thin cylindrical wall to a conical, periplasmic region that exposes N-terminal petals connected by flexible linkers. These petals harbor the binding site of YscD, a component of the inner membrane ring. A change in their orientation adapts the length of the YscC secretin and facilitates its interaction with YscD.
External linksStructure / PubMed:24207124
MethodsEM (single particle)
Resolution15.0 Å
Structure data

EMDB-5720:
Structure of the Yersinia enterocolitica secretin YscC
Method: EM (single particle) / Resolution: 15.0 Å

EMDB-5721:
Structure of the flexible N-terminal region of Yersinia enterocolitica secretin YscC
Method: EM (single particle) / Resolution: 15.0 Å

EMDB-5722:
Structure of the trypsin-resistant core of secretin YscC
Method: EM (single particle) / Resolution: 15.0 Å

Source
  • Yersinia enterocolitica (bacteria)

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