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© Ahmed Haouz
Cristaux d'une protéine de Mycobacterium tuberculosis produits dans le cadre du Grand Programme Horizontal sur la Tuberculose à l'Institut Pasteur. La caractérisation structurale de protéines mycobactériennes aide à une meilleure compréhension de la physiologie et de la pathogénicité des mycobactéries et fournit un point de départ pour la conception de nouveaux agents antibactériens.
Scientific Fields
Diseases
Organisms
Applications
Technique

Published in Nature communications - 10 Sep 2014

Giganti D, Bouillon A, Tawk L, Robert F, Martinez M, Crublet E, Weber P, Girard-Blanc C, Petres S, Haouz A, Hernandez JF, Mercereau-Puijalon O, Alzari PM, Barale JC

Link to Pubmed [PMID] – 25204226

Nat Commun 2014 Sep;5:4833

The Plasmodium subtilase SUB1 plays a pivotal role during the egress of malaria parasites from host hepatocytes and erythrocytes. Here we report the crystal structure of full-length SUB1 from the human-infecting parasite Plasmodium vivax, revealing a bacterial-like catalytic domain in complex with a Plasmodium-specific prodomain. The latter displays a novel architecture with an amino-terminal insertion that functions as a ‘belt’, embracing the catalytic domain to further stabilize the quaternary structure of the pre-protease, and undergoes calcium-dependent autoprocessing during subsequent activation. Although dispensable for recombinant enzymatic activity, the SUB1 ‘belt’ could not be deleted in Plasmodium berghei, suggesting an essential role of this domain for parasite development in vivo. The SUB1 structure not only provides a valuable platform to develop new anti-malarial candidates against this promising drug target, but also defines the Plasmodium-specific ‘belt’ domain as a key calcium-dependent regulator of SUB1 during parasite egress from host cells.

http://www.ncbi.nlm.nih.gov/pubmed/25204226