Results 31 to 40 of about 23,521 (333)

Epigenetic Dysregulation of Mammalian Male Meiosis Caused by Interference of Recombination and Synapsis

open access: yesCells, 2021
Meiosis involves a series of specific chromosome events, namely homologous synapsis, recombination, and segregation. Disruption of either recombination or synapsis in mammals results in the interruption of meiosis progression during the first meiotic ...
Roberto de la Fuente   +10 more
doaj   +1 more source

Defending the genome from the enemy within:mechanisms of retrotransposon suppression in the mouse germline [PDF]

open access: yes, 2013
The viability of any species requires that the genome is kept stable as it is transmitted from generation to generation by the germ cells. One of the challenges to transgenerational genome stability is the potential mutagenic activity of transposable ...
A Aravin   +241 more
core   +2 more sources

Meiotic sex chromosome cohesion and autosomal synapsis are supported by Esco2.

open access: yes, 2020
In mitotic cells, establishment of sister chromatid cohesion requires acetylation of the cohesin subunit SMC3 (acSMC3) by ESCO1 and/or ESCO2. Meiotic cohesin plays additional but poorly understood roles in the formation of chromosome axial elements (AEs)
Biswas, U.   +6 more
core   +1 more source

A Meiotic Checkpoint Alters Repair Partner Bias to Permit Inter-sister Repair of Persistent DSBs [PDF]

open access: yes, 2019
Accurate meiotic chromosome segregation critically depends on the formation of inter-homolog crossovers initiated by double-strand breaks (DSBs). Inaccuracies in this process can drive aneuploidy and developmental defects, but how meiotic cells are ...
Aguilera López, Andrés   +7 more
core   +1 more source

Tau oligomers: the toxic player at synapses in Alzheimer’s disease

open access: yesFrontiers in Cellular Neuroscience, 2015
Alzheimer’s disease (AD) is a progressive disorder in which the most noticeable symptoms are cognitive impairment and memory loss. However, the precise mechanism by which those symptoms develop remains unknown.
Marcos Jair Guerrero-Munoz   +2 more
doaj   +1 more source

Dynamics of rye chromosome 1R regions with high or low crossover frequency in homology search and synapsis development. [PDF]

open access: yesPLoS ONE, 2012
In many organisms, homologous pairing and synapsis depend on the meiotic recombination machinery that repairs double-strand DNA breaks (DSBs) produced at the onset of meiosis.
Nohelia T Valenzuela   +2 more
doaj   +1 more source

Crossover interference mechanism: New lessons from plants

open access: yesFrontiers in Cell and Developmental Biology, 2023
Plants are the source of our understanding of several fundamental biological principles. It is well known that Gregor Mendel discovered the laws of Genetics in peas and that maize was used for the discovery of transposons by Barbara McClintock.
Nahid Rafiei, Arnaud Ronceret
doaj   +1 more source

UBR2 of the N-end rule pathway is required for chromosome stability via histone ubiquitylation in spermatocytes and somatic cells [PDF]

open access: yes, 2012
The N-end rule pathway is a proteolytic system in which its recognition components (N-recognins) recognize destabilizing N-terminal residues of short-lived proteins as an essential element of specific degrons, called N-degrons.
An, JY   +12 more
core   +1 more source

Observation of Extensive Chromosome Axis Remodeling during the “Diffuse-Phase” of Meiosis in Large Genome Cereals

open access: yesFrontiers in Plant Science, 2017
The production of balanced fertile haploid gametes requires the faithful separation of paired (synapsed) chromosomes toward the end of meiotic prophase I (desynapsis).
Isabelle Colas   +9 more
doaj   +1 more source

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