Identification of a family of human centromere proteins using autoimmune sera from patients with scleroderma |
| |
Authors: | William C. Earnshaw Naomi Rothfield |
| |
Affiliation: | (1) Department of Cell Biology and Anatomy, Johns Hopkins University School of Medicine, 725 North Wolfe Street, 21205 Baltimore, MD, USA;(2) Division of Rheumatic Diseases, Department of Medicine, University of Connecticut Health Center, 06032 Farmington, CT, USA |
| |
Abstract: | We have examined preimmune serum samples from a patient who progressively developed the symptoms of scleroderma CREST over a period of several years. During this period, anti-centromere antibodies (recognized by indirect immunofluorescence) appeared in the serum. Concomitant with the appearance of the anti-centromere antibodies, antibody species recognizing three chromosomal antigens in immunoblots of SDS polyacrylamide gels appeared in the patient's serum. These antigens migrate with electrophoretic mobilities corresponding to Mr=17, 80, and 140 kilodaltons (kd). Affinity-eluted antibody fractions recognizing the antigens have been prepared from sera of three other patients. Indirect immunofluorescence labeling of mitotic cells using these antibody fractions demonstrates that the antigens are centromere components. We designate them CENP (CENtromere Protein) — A (17kd), CENP-B (80kd), and CENP-C (140kd). The three CENP antigens share antigenic determinants. Immunoblotting experiments show that these patients make antibody species recognizing at least three distinct epitopes on CENP-B and two on CENP-C. Sera from different patients contain different mixtures of the antibody species. |
| |
Keywords: | |
本文献已被 SpringerLink 等数据库收录! |
|