PMID- 10477520 OWN - NLM STAT- MEDLINE DCOM- 19990921 LR - 20190619 IS - 0036-8075 (Print) IS - 0036-8075 (Linking) VI - 285 IP - 5433 DP - 1999 Sep 3 TI - Differential stimulation of PKC phosphorylation of potassium channels by ZIP1 and ZIP2. PG - 1565-9 AB - Targeting of protein modification enzymes is a key biochemical step to achieve specific and effective posttranslational modifications. Two alternatively spliced ZIP1 and ZIP2 proteins are described, which bind to both Kvbeta2 subunits of potassium channel and protein kinase C (PKC) zeta, thereby acting as a physical link in the assembly of PKCzeta-ZIP-potassium channel complexes. ZIP1 and ZIP2 differentially stimulate phosphorylation of Kvbeta2 by PKCzeta. They also interact to form heteromultimers, which allows for a hybrid stimulatory activity to PKCzeta. Finally, ZIP1 and ZIP2 coexist in the same cell type and are elevated differentially by neurotrophic factors. These results provide a mechanism for specificity and regulation of PKCzeta-targeted phosphorylation. FAU - Gong, J AU - Gong J AD - Department of Physiology, The Johns Hopkins University School of Medicine, 725 North Wolfe Street, Baltimore, MD 21205, USA. FAU - Xu, J AU - Xu J FAU - Bezanilla, M AU - Bezanilla M FAU - van Huizen, R AU - van Huizen R FAU - Derin, R AU - Derin R FAU - Li, M AU - Li M LA - eng GR - NS33324/NS/NINDS NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, Non-P.H.S. PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - Science JT - Science (New York, N.Y.) JID - 0404511 RN - 0 (Carrier Proteins) RN - 0 (DNA, Complementary) RN - 0 (Isoenzymes) RN - 0 (Myelin Basic Protein) RN - 0 (Nerve Growth Factors) RN - 0 (Potassium Channels) RN - 0 (RNA, Messenger) RN - 0 (Recombinant Fusion Proteins) RN - EC 2.7.11.1 (protein kinase C zeta) RN - EC 2.7.11.13 (Protein Kinase C) SB - IM MH - Alternative Splicing MH - Amino Acid Sequence MH - Animals MH - Binding Sites MH - Carrier Proteins/chemistry/genetics/*metabolism MH - Cell Line MH - Cerebellum/metabolism MH - DNA, Complementary MH - Isoenzymes/metabolism MH - Molecular Sequence Data MH - Myelin Basic Protein/metabolism MH - Nerve Growth Factors/pharmacology MH - Neurons/*metabolism MH - Phosphorylation MH - Potassium Channels/*metabolism MH - Protein Kinase C/*metabolism MH - Pyramidal Cells/metabolism MH - RNA, Messenger/genetics/metabolism MH - Rats MH - Rats, Sprague-Dawley MH - Recombinant Fusion Proteins/chemistry/metabolism MH - Substrate Specificity MH - Transfection EDAT- 1999/09/08 00:00 MHDA- 1999/09/08 00:01 CRDT- 1999/09/08 00:00 PHST- 1999/09/08 00:00 [pubmed] PHST- 1999/09/08 00:01 [medline] PHST- 1999/09/08 00:00 [entrez] AID - 7789 [pii] AID - 10.1126/science.285.5433.1565 [doi] PST - ppublish SO - Science. 1999 Sep 3;285(5433):1565-9. doi: 10.1126/science.285.5433.1565.