Year: 1972
Type: article
Abstract: The activity in human serum which is responsible for conversion of C3 proactivator (C3PA) to C3 activator was shown to reside in a 3S alpha-globulin. The factor, called C3PA convertase (C3PAse), was obtained in partially purified form. For conversion of C3PA, C3PAse required participation of metal ions and of a C3 fragment, which in physicochemical and antigenic properties resembled C3b. Isolated, native C3 failed to substitute for the fragment, but did restore the impaired C3 activator system in hydrazine-treated serum. Unlike native C3, the C3 fragment initiated conversion of C3PA in whole serum. A hypothetical concept which envisions the C3 fragment as effector of C3PAse has been proposed.
Authors: Hans J. Müller-Eberhard, Otto Götze
Institution: Scripps Clinic
Language: English
Subfield: Immunology
Field: Immunology and Microbiology
Domain: Life Sciences
Open Access status: bronze
OpenAlex ID: W1978058154