5CQC

Crystal structure of the legionella pneumophila effector protein RavZ

Summary for 5CQC

• Entry DOI: 10.2210/pdb5cqc/pdb
• Descriptor: putative RavZ protein, BARIUM ION (3 entities in total)
• Functional Keywords: ulp-family cysteine protease, autophagy inhibitor, pi3p binding domain, legionella pneumophila effector protein, hydrolase
• Biological source: Legionella pneumophila
• Total number of polymer chains: 1
• Total formula weight: 47256.24

Authors

Horenkamp, F.A.,Reinisch, K.M. (deposition date: 2015-07-21, release date: 2015-09-09, Last modification date: 2024-03-06)

Primary citation

Horenkamp, F.A.,Kauffman, K.J.,Kohler, L.J.,Sherwood, R.K.,Krueger, K.P.,Shteyn, V.,Roy, C.R.,Melia, T.J.,Reinisch, K.M.
The Legionella Anti-autophagy Effector RavZ Targets the Autophagosome via PI3P- and Curvature-Sensing Motifs.
Dev.Cell, 34:569-576, 2015

PubMed Abstract: Autophagy is a conserved membrane transport pathway used to destroy pathogenic microbes that access the cytosol of cells. The intracellular pathogen Legionella pneumophila interferes with autophagy by delivering an effector protein, RavZ, into the host cytosol. RavZ acts by cleaving membrane-conjugated Atg8/LC3 proteins from pre-autophagosomal structures. Its remarkable efficiency allows minute quantities of RavZ to block autophagy throughout the cell. To understand how RavZ targets pre-autophagosomes and specifically acts only on membrane-associated Atg8 proteins, we elucidated its structure. Revealed is a catalytic domain related in fold to Ulp family deubiquitinase-like enzymes and a C-terminal PI3P-binding module. RavZ targets the autophagosome via the PI3P-binding module and a catalytic domain helix, and it preferentially binds high-curvature membranes, intimating localization to highly curved domains in autophagosome intermediate membranes. RavZ-membrane interactions enhance substrate affinity, providing a mechanism for interfacial activation that also may be used by host autophagy proteins engaging only lipidated Atg8 proteins.

PubMed: 26343456
DOI: 10.1016/j.devcel.2015.08.010

Experimental method

X-RAY DIFFRACTION (2.985 Å)