Cytoskeletal changes regulated by the PAK4 serine/threonine kinase are mediated by LIM kinase 1 and cofilin.
Authors: Dan C; Kelly A; Bernard O; Minden A;
Journal:J Biol Chem
PubMed ID:11413130
'PAK4 is the most recently identified member of the PAK family of serine/threonine kinases. PAK4 differs from other members of the PAK family in sequence and in many of its functions. Previously, we have shown that an important function of this kinase is to mediate the induction of filopodia in ... More
Sp3 Represses Gene Expression via the Titration of Promoter-specific Transcription Factors.
Authors: Kennett Sarah B; Moorefield K Scott; Horowitz Jonathan M;
Journal:J Biol Chem
PubMed ID:11773047
'We have determined previously that Sp3 encodes three distinct gene products as follows: a full-length protein (Sp3) that is an activator of transcription and two isoforms (M1 and M2) derived via internal translational initiation that function as transcriptional repressors. To identify amino acids and functions required for transcriptional repression, we ... More
Identification of phosphorylated residues that affect the activity of the mitotic kinase Aurora-A.
Authors: Littlepage Laurie E; Wu Hua; Andresson Thorkell; Deanehan Julia K; Amundadottir Laufey T; Ruderman Joan V;
Journal:Proc Natl Acad Sci U S A
PubMed ID:12422018
'The activity of the kinase Aurora-A (Aur-A) peaks during mitosis and depends on phosphorylation by one or more unknown kinases. Mitotic phosphorylation sites were mapped by mass spec sequencing of recombinant Aur-A protein that had been activated by incubation in extracts of metaphase-arrested Xenopus eggs. Three sites were identified: serine ... More
15-Lipoxygenase metabolism of 2-arachidonylglycerol. Generation of a peroxisome proliferator-activated receptor alpha agonist.
Authors: Kozak Kevin R; Gupta Rajnish A; Moody John S; Ji Chuan; Boeglin William E; DuBois Raymond N; Brash Alan R; Marnett Lawrence J;
Journal:J Biol Chem
PubMed ID:11956198
'The recent demonstrations that cyclooxygenase-2 and leukocyte-type 12-lipoxygenase (LOX) efficiently oxygenate 2-arachidonylglycerol (2-AG) prompted an investigation into related oxygenases capable of metabolizing this endogenous cannabinoid receptor ligand. We evaluated the ability of six LOXs to catalyze the hydroperoxidation of 2-AG. Soybean 15-LOX, rabbit reticulocyte 15-LOX, human 15-LOX-1, and human 15-LOX-2 ... More
Recombinant Dicer efficiently converts large dsRNAs into siRNAs suitable for gene silencing.
Authors:Myers JW, Jones JT, Meyer T, Ferrell JE,
Journal:Nat Biotechnol
PubMed ID:12592410
RNA interference (RNAi) is a powerful method for specifically silencing gene expression in diverse cell types. RNAi is mediated by approximately 21-nucleotide small interfering RNAs (siRNAs), which are produced from larger double-stranded RNAs (dsRNAs) in vivo through the action of Dicer, an RNase III-family enzyme. Transfecting cells with siRNAs rather ... More