Cloning of a novel phosphatidylinositol kinase-related kinase: characterization of the human SMG-1 RNA surveillance protein.
Authors: Denning G; Jamieson L; Maquat L E; Thompson E A; Fields A P;
Journal:J Biol Chem
PubMed ID:11331269
'We have cloned and characterized a new member of the phosphatidylinositol kinase (PIK)-related kinase family. This gene, which we term human SMG-1 (hSMG-1), is orthologous to Caenorhabditis elegans SMG-1, a protein that functions in nonsense-mediated mRNA decay (NMD). cDNA sequencing revealed that hSMG-1 encodes a protein of 3031 amino acids ... More
Multimerization of the ligand binding domains of cyclic nucleotide-gated channels.
Authors: Matulef Kimberly; Zagotta William;
Journal:Neuron
PubMed ID:12367509
Cyclic nucleotide-gated (CNG) channels comprise four subunits and are activated by the direct binding of cyclic nucleotide to an intracellular domain on each subunit. This ligand binding domain is thought to contain a beta roll followed by two alpha helices, designated the B and C helices. To examine the quaternary ... More
Dismantling of cadherin-mediated cell-cell contacts modulates smooth muscle cell proliferation.
Authors:Uglow EB, Slater S, Sala-Newby GB, Aguilera-Garcia CM, Angelini GD, Newby AC, George SJ,
Journal:Circ Res
PubMed ID:12775583
Proliferation of vascular smooth muscle cells (VSMCs) contributes to intimal thickening during atherosclerosis and restenosis. The cadherins are transmembrane proteins, which form cell-cell contacts and may regulate VSMC proliferation. In this study, N-cadherin protein concentration was significantly reduced by stimulation of proliferation with fetal calf serum (FCS) and platelet-derived growth ... More
Tethering sigma70 to RNA polymerase reveals high in vivo activity of sigma factors and sigma70-dependent pausing at promoter-distal locations.
Authors:Mooney RA, Landick R,
Journal:Genes Dev
PubMed ID:14630944
Bacterial sigma factors compete for binding to RNA polymerase (RNAP) to control promoter selection, and in some cases interact with RNAP to regulate at least the early stages of transcript elongation. However, the effective concentration of sigmas in vivo, and the extent to which sigma can regulate transcript elongation generally, ... More
The 'involution' of mannose-binding lectin.
Authors:Seyfarth J, Garred P, Madsen HO,
Journal:Hum Mol Genet
PubMed ID:16115813
Mannose-binding lectin (MBL) acts as a serum opsonin in innate immune defense and induces complement activation by the lectin pathway. In humans, low levels of functional serum MBL are caused by the dominant action of three single nucleotide substitutions in exon 1 that disrupt the glycine-rich backbone structure of the ... More