RCSB PDB - 4BVU: Structure of Shigella effector OspG in complex with host UbcH5c- Ubiquitin conjugate (original) (raw)
E2~Ub Conjugates Regulate the Kinase Activity of Shigella Effector Ospg During Pathogenesis.
[Pruneda, J.N.](/search?q=citation.rcsb%5Fauthors:Pruneda, J.N.), [Smith, F.D.](/search?q=citation.rcsb%5Fauthors:Smith, F.D.), [Daurie, A.](/search?q=citation.rcsb%5Fauthors:Daurie, A.), [Swaney, D.L.](/search?q=citation.rcsb%5Fauthors:Swaney, D.L.), [Villen, J.](/search?q=citation.rcsb%5Fauthors:Villen, J.), [Scott, J.D.](/search?q=citation.rcsb%5Fauthors:Scott, J.D.), [Stadnyk, A.W.](/search?q=citation.rcsb%5Fauthors:Stadnyk, A.W.), [Le Trong, I.](/search?q=citation.rcsb%5Fauthors:Le Trong, I.), [Stenkamp, R.E.](/search?q=citation.rcsb%5Fauthors:Stenkamp, R.E.), [Klevit, R.E.](/search?q=citation.rcsb%5Fauthors:Klevit, R.E.), [Rohde, J.R.](/search?q=citation.rcsb%5Fauthors:Rohde, J.R.), [Brzovic, P.S.](/search?q=citation.rcsb%5Fauthors:Brzovic, P.S.)
(2014) EMBO J 33: 437
PubMed Abstract:
Pathogenic bacteria introduce effector proteins directly into the cytosol of eukaryotic cells to promote invasion and colonization. OspG, a Shigella spp. effector kinase, plays a role in this process by helping to suppress the host inflammatory response. OspG has been reported to bind host E2 ubiquitin-conjugating enzymes activated with ubiquitin (E2~Ub), a key enzyme complex in ubiquitin transfer pathways. A co-crystal structure of the OspG/UbcH5c~Ub complex reveals that complex formation has important ramifications for the activity of both OspG and the UbcH5c~Ub conjugate. OspG is a minimal kinase domain containing only essential elements required for catalysis. UbcH5c~Ub binding stabilizes an active conformation of the kinase, greatly enhancing OspG kinase activity. In contrast, interaction with OspG stabilizes an extended, less reactive form of UbcH5c~Ub. Recognizing conserved E2 features, OspG can interact with at least ten distinct human E2s~Ub. Mouse oral infection studies indicate that E2~Ub conjugates act as novel regulators of OspG effector kinase function in eukaryotic host cells.
Organizational Affiliation:
Department of Biochemistry, University of Washington, Seattle, WA, USA.