Four-jointed is a Golgi kinase that phosphorylates a subset of cadherin domains.
Four-jointed is a Golgi kinase that phosphorylates a subset of cadherin domains.
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四关节是一种高尔基激酶,可磷酸化钙粘蛋白结构域的子集。
DOI:
10.1126/science.1158159
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发表时间:
2008-07-18
期刊:
影响因子:
56.9
通讯作者:
Irvine, Kenneth D.
中科院分区:
文献类型:
--
作者:
Ishikawa, Hiroyuki O.;Takeuchi, Hideyuki;Haltiwanger, Robert S.;Irvine, Kenneth D.
The atypical cadherin Fat acts as a receptor for a signaling pathway that regulates growth, gene expression, and planar cell polarity. Genetic studies in Drosophila identified the four-jointed gene as a regulator of Fat signaling. We show that four-jointed encodes a protein kinase that phosphorylates Ser or Thr residues within extracellular cadherin domains of Fat and its transmembrane ligand, Dachsous. Four-jointed functions in the Golgi, and is the first molecularly-defined kinase that phosphorylates protein domains destined to be extracellular. An acidic sequence motif (DNE) within Four-jointed was essential for its kinase activity in vitro, and for its biological activity in vivo. Our results indicate that Four-jointed regulates Fat signaling by phosphorylating cadherin domains of Fat and Dachsous as they transit through the Golgi.
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