Endocycle
Mostrando 1-11 de 11 artigos, teses e dissertações.
-
1. Sequencing and analysis of a EST Bank from salivary glands of Rhynchosciara americana and characterization of the gene RaDup / Sequenciamento e análise de um banco de cDNA de glândulas salivares de Rhynchosciara americana e caracterização do gene RaDup
In this work EST sequencing was used as strategy to find messages related to development, metabolism and polyteny/amplification in salivary glands of Rhynchosciara americana, a dipteran (Sciaridae) that shows in this tissue giant polytene chromosomes and gene amplification tightly regulated throughout development of the larvae. A total of 8193 EST sequences
Publicado em: 2004
-
2. Reprogramming the Cell Cycle for Endoreduplication in Rodent Trophoblast Cells
Differentiation of trophoblast giant cells in the rodent placenta is accompanied by exit from the mitotic cell cycle and onset of endoreduplication. Commitment to giant cell differentiation is under developmental control, involving down-regulation of Id1 and Id2, concomitant with up-regulation of the basic helix-loop-helix factor Hxt and acquisition of incre
The American Society for Cell Biology.
-
3. Periodic Expression of the Cyclin-dependent Kinase Inhibitor p57Kip2 in Trophoblast Giant Cells Defines a G2-like Gap Phase of the Endocycle
Endoreduplication is an unusual form of cell cycle in which rounds of DNA synthesis repeat in the absence of intervening mitoses. How G1/S cyclin-dependent kinase (Cdk) activity is regulated during the mammalian endocycle is poorly understood. We show here that expression of the G1/S Cdk inhibitor p57Kip2 is induced coincidentally with the transition to the
The American Society for Cell Biology.
-
4. The Cyclin-Dependent Kinase Inhibitor KRP2 Controls the Onset of the Endoreduplication Cycle during Arabidopsis Leaf Development through Inhibition of Mitotic CDKA;1 Kinase ComplexesW⃞
Exit from the mitotic cell cycle and initiation of cell differentiation frequently coincides with the onset of endoreduplication, a modified cell cycle during which DNA continues to be duplicated in the absence of mitosis. Although the mitotic cell cycle and the endoreduplication cycle share much of the same machinery, the regulatory mechanisms controlling t
American Society of Plant Biologists.
-
5. The Plant-Specific Cyclin-Dependent Kinase CDKB1;1 and Transcription Factor E2Fa-DPa Control the Balance of Mitotically Dividing and Endoreduplicating Cells in Arabidopsis
Transgenic Arabidopsis thaliana plants overproducing the E2Fa-DPa transcription factor have two distinct cell-specific phenotypes: some cells divide ectopically and others are stimulated to endocycle. The decision of cells to undergo extra mitotic divisions has been postulated to depend on the presence of a mitosis-inducing factor (MIF). Plants possess a uni
American Society of Plant Biologists.
-
6. TAF10 (TAFII30) Is Necessary for TFIID Stability and Early Embryogenesis in Mice
TAF10 (formerly TAFII30), is a component of TFIID and the TATA box-binding protein (TBP)-free TAF-containing complexes (TFTC/PCAF/STAGA). To investigate the physiological function of TAF10, we disrupted its gene in mice by using a Cre recombinase/LoxP strategy. Interestingly, no TAF10−/− animals were born from intercrosses of TAF10+/− mice, indicating
American Society for Microbiology.
-
7. Somatic polyploidization and cellular proliferation drive body size evolution in nematodes
Most of the hypodermis of a rhabditid nematode such as Caenorhabditis elegans is a single syncytium. The size of this syncytium (as measured by body size) has evolved repeatedly in the rhabditid nematodes. Two cellular mechanisms are important in the evolution of body size: changes in the numbers of cells that fuse with the syncytium, and the extent of its a
The National Academy of Sciences.
-
8. Inability to enter S phase and defective RNA polymerase II CTD phosphorylation in mice lacking Mat1
The trimeric Cdk7–cyclin H–Mat1 complex comprises the kinase subunit of basal transcription factor TFIIH and has been shown to function as a cyclin-dependent kinase (Cdk)-activating kinase. Herein we report that disruption of the murine Mat1 gene leads to peri-implantation lethality coincident with depletion of maternal Mat1 protein. In culture, Mat1–
Oxford University Press.
-
9. Delta signaling from the germ line controls the proliferation and differentiation of the somatic follicle cells during Drosophila oogenesis
The body axes of Drosophila are established during oogenesis through reciprocal interactions between the germ line cells and the somatic follicle cells that surround them. The Notch pathway is required at two stages in this process: first, for the migration of the follicle cells around the germ line cyst and, later, for the polarization of the anterior-poste
Cold Spring Harbor Laboratory Press.
-
10. Male Germ Line Development in Arabidopsis. duo pollen Mutants Reveal Gametophytic Regulators of Generative Cell Cycle Progression1[w]
Male germ line development in flowering plants is initiated with the formation of the generative cell that is the progenitor of the two sperm cells. While structural features of the generative cell are well documented, genetic programs required for generative cell cycle progression are unknown. We describe two novel Arabidopsis (Arabidopsis thaliana) mutants
American Society of Plant Biologists.
-
11. Sites and Regulation of Polyamine Catabolism in the Tobacco Plant. Correlations with Cell Division/Expansion, Cell Cycle Progression, and Vascular Development1
We previously gave a picture of the homeostatic characteristics of polyamine (PA) biosynthesis and conjugation in tobacco (Nicotiana tabacum) plant organs during development. In this work, we present the sites and regulation of PA catabolism related to cell division/expansion, cell cycle progression, and vascular development in the tobacco plant. Diamine oxi
American Society of Plant Biologists.