Popis: |
EspF U , a protein secreted by pathogenic enterohaemorrhagic E. coli (EHEC), activates N-WASp/WASp to induce actin pedestal formation in host cells. Two recent papers in Nature show that EspF U exploits a WASp activation strategy so extreme that it may effectively sequester WASp, blinding it to both autoinhibition and cellular regulation. |