Novel aspects of COP9 signalosome functions revealed through analysis of hypomorphiccsnmutants
نویسندگان
چکیده
منابع مشابه
The COP9 signalosome
But what does it really do? This is the $64,000 question. If we must join in the rampant speculation, the CSN probably has multiple functions. It may serve as a master dock, bringing together proteins, such as a kinase, its substrate, and the proteasome. The CSN might even be an alternative or additional proteasome lid, shuttling ubiquitinated substrates from the SCF to the proteasome. Alternat...
متن کاملThe COP9 signalosome.
The COP9 signalosome (CSN) is composed of eight distinct subunits and is highly homologous to the lid sub-complex of the 26S proteasome. CSN was initially defined as a repressor of photomorphogenesis in Arabidopsis, and it has now been found to participate in diverse cellular and developmental processes in various eukaryotic organisms. Recently, CSN was revealed to have a metalloprotease activi...
متن کاملCOP9 signalosome revisited: a novel mediator of protein degradation.
The COP9 signalosome is an evolutionarily conserved multiprotein complex that was first identified as an essential complex that represses light-regulated development in Arabidopsis. The COP9 signalosome has similarity to the lid of the 19S regulatory particle of the 26S proteasome and has recently been shown to interact with SCF-type E3 ubiquitin ligases. Although its precise role in the proces...
متن کاملCOP9 signalosome regulates autophagosome maturation.
BACKGROUND Autophagy is essential to intracellular homeostasis and is involved in the pathophysiology of a variety of diseases. Mechanisms regulating selective autophagy remain poorly understood. The COP9 signalosome (CSN) is a conserved protein complex consisting of 8 subunits (CSN1 through CSN8), and is known to regulate the ubiquitin-proteasome system. However, it is unknown whether CSN play...
متن کاملJAB1/CSN5 and the COP9 signalosome
The Jun activating binding protein (JAB1) specifically stabilizes complexes of c-Jun or JunD with AP-1 sites, increasing the specificity of target gene activation by AP-1 proteins. JAB1 is also known as COP9 signalosome subunit 5 (CSN5), which is a component of the COP9 signalosome regulatory complex (CSN). Over the past year, JAB1/CSN5 has been implicated in numerous signaling pathways includi...
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ژورنال
عنوان ژورنال: Plant Signaling & Behavior
سال: 2009
ISSN: 1559-2324
DOI: 10.4161/psb.4.9.9526