PMID- 10230800 OWN - NLM STAT- MEDLINE DCOM- 19990519 LR - 20190822 IS - 0896-6273 (Print) IS - 0896-6273 (Linking) VI - 22 IP - 4 DP - 1999 Apr TI - A dynamically regulated 14-3-3, Slob, and Slowpoke potassium channel complex in Drosophila presynaptic nerve terminals. PG - 809-18 AB - Slob is a novel protein that binds to the carboxy-terminal domain of the Drosophila Slowpoke (dSlo) calcium-dependent potassium (K(Ca)) channel. A yeast two-hybrid screen with Slob as bait identifies the zeta isoform of 14-3-3 as a Slob-binding protein. Coimmunoprecipitation experiments from Drosophila heads and transfected cells confirm that 14-3-3 interacts with dSlo via Slob. All three proteins are colocalized presynaptically at Drosophila neuromuscular junctions. Two serine residues in Slob are required for 14-3-3 binding, and the binding is dynamically regulated in Drosophila by calcium/calmodulin-dependent kinase II (CaMKII) phosphorylation. 14-3-3 coexpression dramatically alters dSlo channel properties when wild-type Slob is present but not when a double serine mutant Slob that is incapable of binding 14-3-3 is present. The results provide evidence for a dSlo/Slob/14-3-3 regulatory protein complex. FAU - Zhou, Y AU - Zhou Y AD - Department of Biochemistry, Volen Center for Complex Systems, Brandeis University, Waltham, Massachusetts 02454, USA. FAU - Schopperle, W M AU - Schopperle WM FAU - Murrey, H AU - Murrey H FAU - Jaramillo, A AU - Jaramillo A FAU - Dagan, D AU - Dagan D FAU - Griffith, L C AU - Griffith LC FAU - Levitan, I B AU - Levitan IB LA - eng GR - R01 GM054408/GM/NIGMS NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - United States TA - Neuron JT - Neuron JID - 8809320 RN - 0 (14-3-3 Proteins) RN - 0 (Drosophila Proteins) RN - 0 (Insect Proteins) RN - 0 (Nerve Tissue Proteins) RN - 0 (Potassium Channels) RN - 0 (Proteins) RN - 0 (Slob protein, Drosophila) RN - EC 1.14.16.2 (Tyrosine 3-Monooxygenase) RN - SY7Q814VUP (Calcium) SB - IM MH - 14-3-3 Proteins MH - Animals MH - Calcium/physiology MH - Drosophila/*physiology MH - *Drosophila Proteins MH - Hybridization, Genetic MH - Insect Proteins/physiology MH - Nerve Tissue Proteins/physiology MH - Neuromuscular Junction/physiology MH - Phosphorylation MH - Potassium Channels/physiology MH - Presynaptic Terminals/physiology MH - Proteins/physiology MH - *Tyrosine 3-Monooxygenase EDAT- 1999/05/07 00:00 MHDA- 1999/05/07 00:01 CRDT- 1999/05/07 00:00 PHST- 1999/05/07 00:00 [pubmed] PHST- 1999/05/07 00:01 [medline] PHST- 1999/05/07 00:00 [entrez] AID - S0896-6273(00)80739-4 [pii] AID - 10.1016/s0896-6273(00)80739-4 [doi] PST - ppublish SO - Neuron. 1999 Apr;22(4):809-18. doi: 10.1016/s0896-6273(00)80739-4.