Results 41 to 50 of about 861,603 (331)

On a break with the X: the role of repair of double-stranded DNA breaks in X-linked disease [PDF]

, 2012
The problem of managing free reactive DNA ends in eukaryotic cells has resulted in the development of a number of mechanisms in order to ensure that free ends are rendered non-reactive, or that the double-strand DNA breaks generating the free ends are ...
Cecceroni, Lucia, De Caris, Laura, Tummala, Hemanth   +2 more
core   +3 more sources

Stochastic gene expression and chromosome interactions in protecting the human active X from silencing by XIST

Nucleus, 2021
Mammals use X chromosome inactivation to compensate for the sex difference in numbers of X chromosomes. A relatively unexplored question is how the active X is protected from inactivation by its own XIST gene, the long non-coding RNA, which initiates ...
Barbara R. Migeon
doaj   +1 more source

Massive gene amplification on a recently formed Drosophila Y chromosome. [PDF]

, 2019
Widespread loss of genes on the Y is considered a hallmark of sex chromosome differentiation. Here we show that the initial stages of Y evolution are driven by massive amplification of distinct classes of genes. The neo-Y chromosome of Drosophila miranda
Bachtrog, Doris, Bracewell, Ryan, Mahajan, Shivani   +2 more
core   +1 more source

X Chromosome Evolution in Cetartiodactyla [PDF]

Genes, 2017
The phenomenon of a remarkable conservation of the X chromosome in eutherian mammals has been first described by Susumu Ohno in 1964. A notable exception is the cetartiodactyl X chromosome, which varies widely in morphology and G-banding pattern between species.
Alexey I. Makunin, Jennifer L. Johnson, Denis M. Larkin, Oliver A. Ryder, Anna V. Kukekova, Melody E. Roelke-Parker, Natalya A. Lemskaya, Anastasia A. Proskuryakova, Polina L. Perelman, Alexander S. Graphodatsky, Stephen J. O'Brien, Stephen J. O'Brien, Anastasia I. Kulemzina, June Bellizzi, Violetta R. Beklemisheva, Marta Farré   +15 more
openaire   +6 more sources

Complex Evolutionary History of the Y Chromosome in Flies of the Drosophila obscura Species Group. [PDF]

, 2020
The Drosophila obscura species group shows dramatic variation in karyotype, including transitions among sex chromosomes. Members of the affinis and pseudoobscura subgroups contain a neo-X chromosome (a fusion of the X with an autosome), and ancestral Y ...
Bachtrog, Doris, Bracewell, Ryan
core  

Dosage Sensing, Threshold Responses, and Epigenetic Memory: A Systems Biology Perspective on Random X‐Chromosome Inactivation

, 2020
X‐chromosome inactivation ensures dosage compensation between the sexes in mammals by randomly choosing one out of the two X chromosomes in females for inactivation.
Mutzel, V., Schulz, E.
core   +1 more source

Effects of sex chromosome dosage on corpus callosum morphology in supernumerary sex chromosome aneuploidies. [PDF]

, 2014
BackgroundSupernumerary sex chromosome aneuploidies (sSCA) are characterized by the presence of one or more additional sex chromosomes in an individual's karyotype; they affect around 1 in 400 individuals.
Blumenthal, Jonathan D, Giedd, Jay N, Joshi, Shantanu H, Reuter, Martin, Thompson, Paul M, Toga, Arthur W, Wade, Benjamin SC   +6 more
core   +3 more sources

Artificial escape from XCI by DNA methylation editing of the CDKL5 gene. [PDF]

, 2020
A significant number of X-linked genes escape from X chromosome inactivation and are associated with a distinct epigenetic signature. One epigenetic modification that strongly correlates with X-escape is reduced DNA methylation in promoter regions. Here,
Anderson, Johnathon D, Buchanan, Fiona KB, Cameron, David, Carter, Jasmine L, Coggins, Nicole B, Deng, Peter, Fink, Kyle D, Gonzalez, Casiana E, Halmai, Julian ANM, Halmai, Julian ANM, Lock, Samantha R, Nolta, Jan, O'Geen, Henriette, Segal, David J, Waldo, Jennifer J   +14 more
core   +1 more source

Mitochondrial and chloroplast DNA-based phylogeny of Pelargonium (Geraniaceae) [PDF]

, 2000
Overall phylogenetic relationships within the genus Pelargonium (Geraniaceae) were inferred based on DNA sequences from mitochondrial(mt)-encoded nad1 b/c exons and from chloroplast(cp)-encoded trnL (UAA) 5' exon-trnF (GAA) exon regions using two species
Bakker, Freek T., Culham, Alastair, Gibby, Mary, Pankhurst, Clive E.   +3 more
core   +2 more sources

Rlim/Rnf12, Rex1, and X Chromosome Inactivation

Frontiers in Cell and Developmental Biology, 2019
RLIM/Rnf12 is an E3 ubiquitin ligase that has originally been identified as a transcriptional cofactor associated with LIM domain transcription factors.
Feng Wang, Ingolf Bach
doaj   +1 more source