[en] Expression of the lysozyme gene is a marker for the differentiation of macrophages, lysozyme transcription being gradually increased during maturation. We have analyzed the fine structure and function of two macrophage-specific enhancer elements of the chicken lysozyme gene (E-2.7 kb and E-0.2 kb). Both increase their activities upon LPS induction, both contain multiple binding sites for similar or identical nuclear factors and both can be divided into two functional modules. For the E-0.2 kb enhancer we found a synergistic activity of the modules to be dependent on their distance. Binding sites for nuclear proteins within enhancer E-0.2 kb overlap substantially with the previously identified progesterone/glucocorticoid receptor binding site, which is required for steroid induction of lysozyme transcription in the oviduct.
Disciplines :
Genetics & genetic processes
Author, co-author :
Altschmied, J.
Muller, Marc ; Université de Liège - ULiège > Département des sciences de la vie > GIGA-R : Biologie et génétique moléculaire
Baniahmad, A.
Steiner, C.
Renkawitz, R.
Language :
English
Title :
Cooperative interaction of chicken lysozyme enhancer sub-domains partially overlapping with a steroid receptor binding site.
Schreiber, E., Muller, M.M., Schafiher, W. and Matthias, P. (1989) In: Renkawitz, R. (ed.), Tissue Specific Gene Expression. VCH Verlagsgesellschaft, Weinheim, in press.
Takahashi, K., Vigneron, M., Matthes, H., Wildeman, A., Zenke, M. and Chambon, P. (1986) Nature, 319, 121-126.
Tsai, S.Y., Sagami, I., Wang, H., Tsai, M. and O’Malley, B.W. (1987) Cell, 50, 701-709.
Zheng, X., Moncollin, V., Egly, J.M. and Chambon, P. (1987) Cell, 50, 361-368.
Curran, T. and Franza, B.R. (1988) Cell, 55, 395 - 397.
Lillie, J.W. and Green, M.R. (1989) Nature, 338, 39 -44.