212 research outputs found
Late Palaeozoic and Meso-Cenozoic tectonic evolution of the Southern Kyrgyz Tien Shan : constraints from multi-method thermochronology in the Trans-Alai, Turkestan-Alai segment and the southeastern Ferghana Basin
No full textAbstract not availableJ. De Grave, S. Glorie, A. Ryabinin, F. Zhimulev, M.M. Buslov, A. Izmer, M. Elburg, F. Vanhaecke, P. Van den haut
Formation of the Kokchetav subduction-collision zone (northern Kazakhstan) : insights from zircon U-Pb and Lu-Hf isotope systematics
No full textAbstract not availableS. Glorie , F.I. Zhimulev, M.M. Buslov, T. Andersen, D. Plavsa, A. Izmer, F. Vanhaecke, J. De Grav
Tectonic history of the Irtysh shear zone (NE Kazakhstan) : new constraints from zircon U/Pb dating, apatite fission track dating and palaeostress analysis
No full textAbstract not availableS. Glorie, J. De Grave, D. Delvaux, M.M. Buslov, F.I. Zhimulev, F. Vanhaecke, M.A. Elburg, P. Van den haut
Cytogenetic analysis of the third chromosome heterochromatin of Drosophila melanogaster.
No full textPrevious cytological analysis of heterochromatic rearrangements has yielded significant insight into the location and genetic organization of genes mapping to the heterochromatin of chromosomes X, Y, and 2 of Drosophila melanogaster. These studies have greatly facilitated our understanding of the genetic organization of heterochromatic genes. In contrast, the 12 essential genes known to exist within the mitotic heterochromatin of chromosome 3 have remained only imprecisely mapped. As a further step toward establishing a complete map of the heterochomatic genetic functions in Drosophila, we have characterized several rearrangements of chromosome 3 by using banding techniques at the level of mitotic chromosome. Most of the rearrangement breakpoints were located in the dull fluorescent regions h49, h51, and h58, suggesting that these regions correspond to heterochromatic hotspots for rearrangements. We were able to construct a detailed cytogenetic map of chromosome 3 heterochromatin that includes all of the known vital genes. At least 7 genes of the left arm (from l(3)80Fd to l(3)80Fj) map to segment h49-h51, while the most distal genes (from l(3)80Fa to l(3)80Fc) lie within the h47-h49 portion. The two right arm essential genes, l(3)81Fa and l(3)81Fb, are both located within the distal h58 segment. Intriguingly, a major part of chromosome 3 heterochromatin was found to be "empty," in that it did not contain either known genes or known satellite DNAs
Formation and Palaeozoic evolution of the Gorny-Altai - Altai-Mongolia suture zone (South Siberia) : zircon U/Pb constraints on the igneous record
No full textAbstract not availableS. Glorie, J. De Grave, M.M. Buslov, F.I. Zhimulev, A. Izmer, W. Vandoorne, A. Ryabinin, P. Van den haute, F. Vanhaecke, M.A. Elbur
Relationship between the Ordovician and Carboniferous-Permian collisional events in the southeastern Tunka bald mountains, East Sayan (southwestern framing of the Siberian Platform)
No full textAbstract not availableF.I. Zhimulev, M.M. Buslov, S. Glorie, J. De Grave, M.A. Fidler, A. Izme
Differential distribution of heterochromatic proteins in somatic and female germ-line cell chromosomes of Drosophila melanogaster.
No full textWe have investigated the distribution of three
heterochromatic proteins [SUppressor of UnderReplication
(SUUR), heterochromatin protein 1 (HP1), and SU(VAR)
3–9] in chromosomes of nurse cells (NCs) and have
compared the data obtained with the distribution of the
same proteins in salivary gland (SG) chromosomes. In NC
chromosomes, the SU(VAR)3–9 protein was found in
pericentric heterochromatin and at 223 sites on euchromatic
arms, while in SG chromosomes, it was mainly
restricted to the chromocenter. In NC chromosomes, the
HP1 and SUUR proteins bind to 331 and 256 sites,
respectively, which are almost twice the number of sites in
SG chromosomes. The distribution of the HP1 and SU
(VAR)3–9 proteins depends on the SuUR gene. A mutation
in this gene results in a dramatic decrease in the amount of
SU(VAR)3–9 binding sites in autosomes. In the X
chromosome, these sites are relocated in comparison to
the SuUR+, and their total number only varies slightly. HP1
binding sites are redistributed in chromosomes of SuUR
mutants, and their overall number did not change as
considerably as SU(VAR)3–9. These data together point to
an interaction of these three proteins in Drosophila NC
chromosomes
Detrital zircon provenance of early Palaeozoic sediments at the southwestern margin of the Siberian craton: insights from U-Pb geochronology
No full textAbstract not availableS. Glorie, J. De Grave, M.M. Buslov, F.I. Zhimulev, I.Yu. Safonov
Structural control on Meso-Cenozoic tectonic reactivation and denudation in the Siberian Altai: insights from multi-method thermochronometry
No full textAbstract not availableS. Glorie, J. De Grave, M.M. Buslov, F.I. Zhimulev, M.A. Elburg, P. Van den haut
Transposable elements as artisans of the heterochromatic genome in Drosophila melanogaster
No full textOver 50 years ago Barbara McClintock discovered that maize contains mobile genetic elements, but her findings were at first considered nothing more than anomalies. Today it is widely recognized that transposable elements have colonized all eukaryotic genomes and represent a major force driving evolution of organisms. Our contribution to this special issue deals with the theme of transposable element-host genome interactions. We bring together published and unpublished work to provide a picture of the contribution of transposable elements to the evolution of the heterochromatic genome in Drosophila melanogaster. In particular, we discuss data on 1) colonization of constitutive heterochromatin by transposable elements, 2) instability of constitutive heterochromatin induced by the I factor, and 3) evolution of constitutive heterochromatin and heterochromatic genes driven by transposable elements. Drawing attention to these topics may have direct implications on important aspects of genome organization and gene expression
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