Type IX secretion system PorM and gliding machinery GldM form arches spanning the periplasmic space

Abstract

No structural data for the bacterial type IX secretion system (T9SS) are available so far. Here, the authors present the crystal structures of the periplasmic domains from two major T9SS components PorM and GldM, which span most of the periplasmic space, and propose a putative model of the T9SS core membrane complex.