alexa I kappa B-beta regulates the persistent response in a biphasic activation of NF-kappa B.
Molecular Biology

Molecular Biology

Journal of Cytology & Histology

Author(s): Thompson JE, Phillips RJ, ErdjumentBromage H, Tempst P, Ghosh S

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Abstract We have cloned the cDNA encoding I kappa B-beta, one of the two major I kappa B isoforms in mammalian cells. The recombinant I kappa B- beta protein interacts with equal affinity to p65 and c-Rel and does not exhibit a preference between these Rel proteins. Instead the primary difference between I kapp B-alpha and I kappa B-beta is in their response to different inducers of NF-kappa B activity. One class of inducers causes rapid but transient activation of NF-kappa B by primarily affecting I kappa B-alpha complexes, whereas another class of inducers causes persistent activation of NF-kapa B by affecting both I kappa B-alpha and I kappa B-beta complexes. Therefore, the overall activation of NF-kappa B consists of two overlapping phases, a transient phase mediated through I kappa B-alpha and a persistent phase mediated through I kappa B-beta.
This article was published in Cell and referenced in Journal of Cytology & Histology

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