Curli are a class highly aggregated surface fibres that are part of a complex extracellular matrix. They promote biofilm formation in addition to other activities. CsgE is a non-structural protein involved in curli biogenesis [2]. CsgE forms an outer membrane complex with the curli assembly proteins CsgG and CsgF [1].

1: Secretion of curli fibre subunits is mediated by the outer membrane-localized CsgG protein. Robinson LS, Ashman EM, Hultgren SJ, Chapman MR; Mol Microbiol. 2006;59:870-881. PMID:16420357

2: Role of Escherichia coli curli operons in directing amyloid fiber formation. Chapman MR, Robinson LS, Pinkner JS, Roth R, Heuser J, Hammar M, Normark S, Hultgren SJ; Science. 2002;295:851-855. PMID:11823641