Title: Molecular cloning and characterization of protein kinase D: a target for diacylglycerol and phorbol esters with a distinctive catalytic domain
Authors: Valverde, A M
Sinnett-Smith, J
Van Lint, Johan
Rozengurt, E # ×
Issue Date: 23-Oct-1994
Series Title: Proceedings of the National Academy of Sciences of the United States of America vol:91 issue:18 pages:8572-6
Abstract: A serine/threonine protein kinase that binds phorbol esters and diacylglycerol (named protein kinase D, PKD) has been identified. PKD contains membrane localization signals and a cysteine-rich repeat sequence homologous to that seen in the regulatory domain of protein kinase C (PKC). A bacterially expressed N-terminal domain of PKD exhibited high-affinity phorbol ester binding activity (Kd = 35 nM). The diacylglycerol analog 1-oleoyl-2-acetylglycerol inhibited phorbol ester binding in a dose-dependent manner. The catalytic domain of PKD contains all characteristic sequence motifs of serine protein kinases but shows only a low degree of sequence similarity to PKCs. The highest identity is with the catalytic domain of myosin light-chain kinase from Dictyostelium (41%). The bacterially expressed catalytic domain of PKD efficiently phosphorylated the exogenous peptide substrate syntide 2 in serine but did not catalyze significant phosphorylation of a variety of other substrates used by PKCs and other major second messenger regulated kinases. PKD may be an unusual component in the transduction of diacylglycerol and phorbol ester signals.
ISSN: 0027-8424
Publication status: published
KU Leuven publication type: IT
Appears in Collections:Biochemistry Section (Medicine) (-)
Laboratory of Protein Phosphorylation and Proteomics
× corresponding author
# (joint) last author

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