title: Two-partner secretion: as simple as it sounds?
abstract: The two-partner secretion (TPS) pathway is a branch of type V secretion. TPS systems are dedicated to the secretion across the outer membrane of long proteins that form extended β-helices. They are composed of a 'TpsA' cargo protein and a 'TpsB' transporter, which belongs to the Omp85 superfamily. This basic design can be supplemented by additional components in some TPS systems. X-ray structures are available for the conserved TPS domain of several TpsA proteins and for one TpsB transporter. However, the molecular mechanisms of two-partner secretion remain to be deciphered, and in particular, the specific role(s) of the TPS domain and the conformational dynamics of the TpsB transporter. Deciphering the TPS pathway may reveal functional features of other transporters of the Omp85 superfamily.
authors.affiliation: Inserm U1019, Lille, France. francoise.jacob@ibl.fr
authors.forename: Françoise
authors.initials: F
authors.lastname: Jacob-Dubuisson
authors.forename: Jérémy
authors.initials: J
authors.lastname: Guérin
authors.forename: Stéphanie
authors.initials: S
authors.lastname: Baelen
authors.forename: Bernard
authors.initials: B
authors.lastname: Clantin
mesh_terms: D001419:Bacteria / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D001425:Bacterial Outer Membrane Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism; D058947:Bacterial Secretion Systems; D026901:Membrane Transport Proteins / Q000737:chemistry / Q000235:genetics / Q000378:metabolism*; D017433:Protein Structure, Secondary; D017434:Protein Structure, Tertiary; D021381:Protein Transport
chemical_list: D001425:Bacterial Outer Membrane Proteins; D058947:Bacterial Secretion Systems; D026901:Membrane Transport Proteins
keywords: Bacterial secretion pathways; Gram-negative bacteria; Membrane protein; Protein secretion; Protein transport; Virulence factors