Discovery of a gene family critical to wyosine base formation in a subset of phenylalanine-specific transfer RNAs.
Authors:Waas WF, de Crécy-Lagard V, Schimmel P,
Journal:J Biol Chem
PubMed ID:16162496
'A large number of post-transcriptional base modifications in transfer RNAs have been described (Sprinzl, M., Horn, C., Brown, M., Ioudovitch, A., and Steinberg, S. (1998) Nucleic Acids Res. 26, 148-153). These modifications enhance and expand tRNA function to increase cell viability. The intermediates and genes essential for base modifications in ... More
Participation of an Endomembrane Cation/H+ Exchanger AtCHX20 in Osmoregulation of Guard Cells.
'Guard cell movement is induced by environmental and hormonal signals that cause changes in turgor through changes in uptake or release of solutes and water. Several transporters mediating these fluxes at the plasma membrane have been characterized, however less is known about transport at endomembranes. CHX20, a member of a ... More
Identification of a receptor-independent activator of G protein signaling (AGS8) in ischemic heart and its interaction with Gbetagamma.
Authors:Sato M, Cismowski MJ, Toyota E, Smrcka AV, Lucchesi PA, Chilian WM, Lanier SM,
Journal:Proc Natl Acad Sci U S A
PubMed ID:16407149
'As part of a broader effort to identify postreceptor signal regulators involved in specific diseases or organ adaptation, we used an expression cloning system in Saccharomyces cerevisiae to screen cDNA libraries from rat ischemic myocardium, human heart, and a prostate leiomyosarcoma for entities that activated G protein signaling in the ... More
Isolation and characterization of cDNAs encoding an enzyme with glucosyltransferase activity for cyclo-DOPA from four o'clocks and feather cockscombs.
Authors:Sasaki N, Wada K, Koda T, Kasahara K, Adachi T, Ozeki Y,
Journal:Plant Cell Physiol
PubMed ID:15695438
cDNAs encoding an enzyme with UDP-glucose:cyclo-DOPA 5-O-glucosyltransferase activity were isolated from four o'clocks and feather cockscombs. Phylogenetic analysis of the amino acid sequences deduced from the cDNAs show that they represent a single subclade distinct from those of other phenylpropanoid and flavonoid glucosyltransferases. Changes in the amount of transcripts of ... More
The plant-specific kinase CDKF;1 is involved in activating phosphorylation of cyclin-dependent kinase-activating kinases in Arabidopsis.
Authors:Shimotohno A, Umeda-Hara C, Bisova K, Uchimiya H, Umeda M,
Journal:Plant Cell
PubMed ID:15486101
Cyclin-dependent kinases (CDKs) play essential roles in coordinate control of cell cycle progression. Activation of CDKs requires interaction with specific cyclin partners and phosphorylation of their T-loops by CDK-activating kinases (CAKs). The Arabidopsis thaliana genome encodes four potential CAKs. CAK2At (CDKD;3) and CAK4At (CDKD;2) are closely related to the vertebrate ... More