TssK structure
Nguyen V.S., Logger L., Spinelli S., Legrand P., Huyen Pham T.T., Nhung Trinh T.T., Cherrak Y., Zoued A., Desmyter A., Durand E., Roussel A., Kellenberger C., Cascales E., Cambillau C. 2017. Type VI secretion TssK baseplate protein exhibits structural similarity with phage receptor-binding proteins and evolved to bind the membrane complex. Nat Microbiol. 2, 17103.
see the CNRS press release here