The type 2 secretion and type 4 pilus systems of Escherichia coli - Escherichia coli: Pathotypes and Principles of Pathogenesis - page 380

TABLE 13.1 Common and unique proteins of E. coli T2S and T4P systems

System

Type 2
secretion Protein description BFP Longus CFA/III R64 HCP

Inner membrane
protein, interacts with
secretin

GspC - - - -

Outer membrane
secretin

GspD BfpB LngD CofD PilN HofQ

Secretion ATPase GspE BfpD LngH CofH PilQ HcpB

Polytopic inner
membrane platform
protein

GspF BfpE LngI CofI PilR HcpC

Major pilin or
pseudopilin

GspG BfpA LngA CofA PilS HcpA

Pilin-like protein,
minor pilin or
pseudopilin

GspH BfpI LngB CofB PilV PpdC

Pilin-like protein,
minor pilin or
pseudopilin

GspI BfpJ - - - YgdB

Pilin-like protein,
minor pilin or
pseudopilin

GspJ BfpK - - - PpdB

Pilin-like protein,
minor pilin or
pseudopilin

GspK - - - - PpdA

Bitopic inner-
membrane protein

GspL BfpC LngE CofE -

Bitopic inner-
membrane protein

GspM - - - -

Prepilin peptidase GspO BfpP LngP CofP PilU b2972

Pilotin YghG - - - -

Gene regulation PerA LngS CofS -

Gene regulation - LngR CofR -

Retraction ATPase - BfpF - - - YggR

Continued