Interaction of C3b2‒IgG complexes with complement proteins properdin, factor B and factor H: implications for amplification

Interaction of C3b(2)--IgG complexes with complement proteins properdin, factor B and factor H: implications for amplification.

Nascent C3b can form ester bonds with various target molecules on the cell surface and in the fluid phase. Previously, we showed that C3b(2)--IgG complexes represent the major covalent product of C3 activation in serum [Lutz, Stammler, Jelezarova, Nater and Späth (1996) Blood 88, 184--193]. In the present report, binding of alternative pathway proteins to purified C3b(2)--IgG complexes was stud...

cloning, expression and purification of the factor h binding protein and its interaction with factor h

background and objective: neisseria meningitidis is a leading cause of meningitis and sepsis worldwide. the factor h binding protein (fhbp) is a key virulence factor of neisseria meningitidis that is able to selectively bind to human factor h, the key regulator of the alternative complement pathway, which it has important implications for meningococcal pathogene- sis and vaccine design. the aim...

Analysis of the interaction between properdin and factor B, components of the alternative-pathway C3 convertase of complement.

The interactions between Factor B (B), its activation products Ba and Bb, properdin (P) and C3i or C3b, components that together form the alternative-pathway C3 convertase enzyme of human complement, have been analysed. Fluid-phase complexes of the purified components C3i, B and P were probed with the homobifunctional cross-linking reagent disuccinimidyl tartarate, and efficient cross-linking o...

Interaction of uromodulin and complement factor H enhances C3b inactivation

Recent studies suggest that uromodulin plays an important role in chronic kidney diseases. It can interact with several complement components, various cytokines and immune system cells. Complement factor H (CFH), as a regulator of the complement alternative pathway, is also associated with various renal diseases. Thus, we have been suggested that uromodulin regulates complement activation by in...

Complement factor H