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Arabidopsis ubiquitin-specific protease 6 (AtUBP6) interacts with calmodulin
- Source :
- FEBS Letters; Jul2005, Vol. 579 Issue 18, p3885-3890, 6p
- Publication Year :
- 2005
-
Abstract
- Abstract: Calmodulin (CaM), a key Ca<superscript>2+</superscript> sensor in eukaryotes, regulates diverse cellular processes by interacting with many proteins. To identify Ca<superscript>2+</superscript>/CaM-mediated signaling components, we screened an Arabidopsis expression library with horseradish peroxidase-conjugated Arabidopsis calmodulin2 (AtCaM2) and isolated a homolog of the UBP6 deubiquitinating enzyme family (AtUBP6) containing a Ca<superscript>2+</superscript>-dependent CaM-binding domain (CaMBD). The CaM-binding activity of the AtUBP6 CaMBD was confirmed by CaM mobility shift assay, phosphodiesterase competition assay and site-directed mutagenesis. Furthermore, expression of AtUBP6 restored canavanine resistance to the Δubp6 yeast mutant. This is the first demonstration that Ca<superscript>2+</superscript> signaling via CaM is involved in ubiquitin-mediated protein degradation and/or stabilization in plants. [Copyright &y& Elsevier]
- Subjects :
- CALMODULIN
EUKARYOTIC cells
ARABIDOPSIS
HORSERADISH
Subjects
Details
- Language :
- English
- ISSN :
- 00145793
- Volume :
- 579
- Issue :
- 18
- Database :
- Complementary Index
- Journal :
- FEBS Letters
- Publication Type :
- Academic Journal
- Accession number :
- 18136987
- Full Text :
- https://doi.org/10.1016/j.febslet.2005.05.080