Protein synthesis in distal axons is not required for growth cone responses to guidance cues.
AuthorsRoche FK, Marsick BM, Letourneau PC,
JournalJ Neurosci
PubMed ID19158291
'Recent evidence suggests that growth cone responses to guidance cues require local protein synthesis. Using chick neurons, we investigated whether protein synthesis is required for growth cones of several types to respond to guidance cues. First, we found that global inhibition of protein synthesis stops axonal elongation after 2 h. ... More
Direct in-gel fluorescence detection and cellular imaging of O-GlcNAc-modified proteins.
'We report an advanced chemoenzymatic labeling strategy for direct fluorescence detection of O-GlcNAc proteins in gels that facilitates proteomic studies and greatly extend the reach of existing technologies. These new tools also enable the expression and dynamics of O-GlcNAc modifications to be monitored by imaging in cells and tissues. ... More
The cytoplasmic tail dileucine motif LL572 determines the glycosylation pattern of membrane-type 1 matrix metalloproteinase.
'Membrane-type 1 matrix metalloproteinase (MT1-MMP; MMP-14) drives fundamental physiological and pathological processes, due to its ability to process a broad spectrum of substrates. Because subtle changes in its activity can produce profound physiological effects, MT1-MMP is tightly regulated. Currently, many aspects of this regulation remain to be elucidated. It has ... More
A novel approach to tag and identify geranylgeranylated proteins.
New insights into metabolic signaling and cell survival: the role of beta-O-linkage of N-acetylglucosamine.
AuthorsNgoh GA, Jones SP,
JournalJ Pharmacol Exp Ther
PubMed ID18768779
The involvement of glucose in fundamental metabolic pathways represents a core element of biology. Late in the 20th century, a unique glucose-derived signal was discovered, which appeared to be involved in a variety of cellular processes, including mitosis, transcription, insulin signaling, stress responses, and potentially, Alzheimer's disease, and diabetes. By ... More
Respiratory syncytial virus limits alpha subunit of eukaryotic translation initiation factor 2 (eIF2alpha) phosphorylation to maintain translation and viral replication.
AuthorsGroskreutz DJ, Babor EC, Monick MM, Varga SM, Hunninghake GW,
JournalJ Biol Chem
PubMed ID20519500
The impact of respiratory syncytial virus (RSV) on morbidity and mortality is significant in that it causes bronchiolitis in infants, exacerbations in patients with obstructive lung disease, and pneumonia in immunocompromised hosts. RSV activates protein kinase R (PKR), a cellular kinase relevant to limiting viral replication (Groskreutz, D. J., Monick, ... More
Regulation of calcium/calmodulin-dependent kinase IV by O-GlcNAc modification.
AuthorsDias WB, Cheung WD, Wang Z, Hart GW,
JournalJ Biol Chem
PubMed ID19506079
Similar to phosphorylation, GlcNAcylation (the addition of O-GlcNAc to Ser(Thr) residues on polypeptides) is an abundant, dynamic, and inducible post-translational modification. GlcNAcylated proteins are crucial in regulating virtually all cellular processes, including signaling, cell cycle, and transcription. Here we show that calcium/calmodulin-dependent kinase IV (CaMKIV) is highly GlcNAcylated in vivo. ... More