Analysis of the stability of HLA-A2 molecules expressed on the cell surface

Cited 0 time in scopus
Metadata Downloads
Title
Analysis of the stability of HLA-A2 molecules expressed on the cell surface
Author(s)
Jong Seok Lim; Ki Young Lee; Hee Gu Lee; Ik Hwan Kim; Chong Kil Lee; Seong Sun Han; Kil Hyoun Kim
Bibliographic Citation
BMB Reports, vol. 29, no. 4, pp. 286-293
Publication Year
1996
Abstract
Association of antigenic peptide with class I MHC is believed to be crucial for maintaining stable conformation of class I molecules. T2 cells that are defective in TAP gene function mainly express class I molecules with an unstable conformation due to little or no association with antigenic peptides, whereas T1 cells that are normal in TAP gene function mainly express the stable form of class I molecules. In this work, attempts were made to determine the molecular stability of stable and unstable class I molecules. Dissociation of HLA-A2 molecules on T1 and T2 cells was monitored by flow cytomerry using anti-HLA-A2 antibody after the cells were treated with brefeldin A to shut down the transport of newly-assembled HLA-A2. Estimated dissociation rate constants for the stable and unstable forms of HLA-A2 were 0.076 h-1 and 0.66 h-1, respectively. It appeared that both T1 and T2 cells express stable and unstable class I complex, but with different ratios of the two forms. Furthermore, interferon-γ treatment of T1 cells appeared to induce the expression of both the stable and unstable class I molecules. These results demonstrate that class I MHC molecules can be divided into two groups in terms of structural stability and that they exist on the cell surface in both forms in a certain ratio.
Keyword
cell surface expressiondissociation rate constantHLA-A2 moleculeinterferon-γ
ISSN
1225-8687
Publisher
Korea Soc-Assoc-Inst
Type
Article
Appears in Collections:
Division of Biomedical Research > Immunotherapy Research Center > 1. Journal Articles
Files in This Item:
  • There are no files associated with this item.


Items in OpenAccess@KRIBB are protected by copyright, with all rights reserved, unless otherwise indicated.