Complementary DNA

About: Complementary DNA is a research topic. Over the lifetime, 55301 publications have been published within this topic receiving 2752650 citations. The topic is also known as: cDNA & DNA, Complementary.

Cloning of cDNA encoding the murine IgG1 induction factor by a novel strategy using SP6 promoter.

Abstract: Complementary DNA encoding the IgG1 induction factor, the first lymphokine directed to B lymphocytes, from a murine T-cell line has been cloned using a new strategy. The putative primary amino-acid sequence was deduced from the nucleotide sequence determined. The lymphokine synthesized by the direction of this cloned cDNA has many other functions, such as production of B-cell growth factor-1 and induction of Ia on B cells.

Primary structures of beta- and delta-subunit precursors of Torpedo californica acetylcholine receptor deduced from cDNA sequences.

Abstract: The nicotinic acetylcholine receptor (AChR) from fish electric organ and mammalian skeletal muscle is the best characterized neurotransmitter receptor (reviewed in refs 1–3). The AChR from the electroplax of the ray Torpedo californica consists of five subunits present in a molar stoichiometry of α2βγδ (refs 4–6); the apparent molecular weights of the α-, β-, γ- and δ-subunits are 40,000 (40K), 50K, 60K and 65K, respectively7–11. Knowledge of the primary structures of these constituent polypeptides would facilitate the understanding of the molecular mechanism underlying the function of the neurotransmitter receptor. Recently, we have cloned cDNA for the α-subunit precursor of the T. californica AChR and have deduced the primary structure of this polypeptide from the nucleotide sequence of the cloned cDNA12. Here we report the cloning and nucleotide analysis of cDNAs for the AChR β- and δ-subunit precursors. The primary structures of the two polypeptides deduced from the cDNA sequences reveal conspicuous amino acid sequence homology among these and the α-subunits. The three subunits contain several highly conserved regions which may be essential for the receptor function or inter-summit interaction.

Monitoring the expression pattern of around 7,000 Arabidopsis genes under ABA treatments using a full-length cDNA microarray

Abstract: Full-length cDNAs are essential for functional analysis of plant genes. Recently, cDNA microarray analysis has been developed for quantitative analysis of global and simultaneous analysis of expression profiles. Microarray technology is a powerful tool for identifying genes induced by environmental stimuli or stress and for analyzing their expression profiles in response to environmental signals. We prepared an Arabidopsis full-length cDNA microarray containing around 7,000 independent full-length cDNA groups and analyzed the expression profiles of genes. The transcripts of 245, 54, 299 and 213 genes increased after abscisic acid (ABA), drought-, cold-, and salt-stress treatments, respectively, with inducibilities more than fivefold compared with those of control genes. The cDNA microarray analysis showed that many ABA-inducible genes were induced after drought- and high-salinity-stress treatments, and that there is more crosstalk between drought and ABA responses than between ABA and cold responses. Among the ABA-inducible genes identified, we identified 22 transcription factor genes, suggesting that many transcriptional regulatory mechanisms exist in the ABA signal transduction pathways. Electronic supplementary material to this paper can be obtained by using the Springer Link server located at http://dx.doi.org/10.1007/s10142-002-0070-6 or from http://www.gsc.riken.go.jp/Plant/index.html.