Interplay between components of a novel LIM kinase-slingshot phosphatase complex regulates cofilin.
Authors:Soosairajah J, Maiti S, Wiggan O, Sarmiere P, Moussi N, Sarcevic B, Sampath R, Bamburg JR, Bernard O
Journal:EMBO J
PubMed ID:15660133
'Slingshot (SSH) phosphatases and LIM kinases (LIMK) regulate actin dynamics via a reversible phosphorylation (inactivation) of serine 3 in actin-depolymerizing factor (ADF) and cofilin. Here we demonstrate that a multi-protein complex consisting of SSH-1L, LIMK1, actin, and the scaffolding protein, 14-3-3zeta, is involved, along with the kinase, PAK4, in the ... More
Initial analysis of the phosphoproteome of Chinese hamster ovary cells using electrophoresis.
Authors:Chen Z, Southwick K, Thulin CD
Journal:J Biomol Tech
PubMed ID:15585821
'Protein phosphorylation is a common post-translational modification of enormous biological importance. Analysis of phosphorylation at the global level should shed light on the use of this modification to regulate metabolism, signal transduction, and other processes. We have begun a proteomic analysis of phosphorylation using two-dimensional gel electrophoresis. Chinese hamster ovary ... More
Critical role of serine 465 in isoflurane-induced increase of cell-surface redistribution and activity of glutamate transporter type 3.
Authors:Huang Y, Feng X, Sando JJ, Zuo Z
Journal:J Biol Chem
PubMed ID:17062570
'Glutamate transporters (also called excitatory amino acid transporters, EAATs) bind extracellular glutamate and transport it to intracellular space to regulate glutamate neurotransmission and to maintain extracellular glutamate concentrations below neurotoxic levels. We previously showed that isoflurane, a commonly used anesthetic, enhanced the activity of EAAT3, a major neuronal EAAT. This ... More
Comparative proteomes of the proliferating C(2)C(12) myoblasts and fully differentiated myotubes reveal the complexity of the skeletal muscle differentiation program.
Authors:Tannu NS, Rao VK, Chaudhary RM, Giorgianni F, Saeed AE, Gao Y, Raghow R
Journal:Mol Cell Proteomics
PubMed ID:15286212
'When cultured in low serum-containing growth medium, the mouse C(2)C(12) cells exit cell cycle and undergo a well-defined program of differentiation that culminates in the formation of myosin heavy chain-positive bona fide multinucleated muscle cells. To gain an understanding into this process, we compared total, membrane- and nuclear-enriched proteins, and ... More
Characterization of dynamic and steady-state protein phosphorylation using a fluorescent phosphoprotein gel stain and mass spectrometry.
'Protein phosphorylation plays a vital role in the regulation of most aspects of cellular activity, being key to propagating messages within signal transduction pathways and to modulating protein function. Pro-Q Diamond phosphoprotein gel stain is suitable for the fluorescence detection of phosphoserine-, phosphothreonine-, and phosphotyrosine-containing proteins directly in sodium dodecyl ... More