The sperm nucleus: chromatin, RNA and the nuclear matrix
GD Johnson, C Lalancette… - Reproduction …, 2010 - pmc.ncbi.nlm.nih.gov
Reproduction (Cambridge, England), 2010•pmc.ncbi.nlm.nih.gov
Within the sperm nucleus the paternal genome remains functionally inert and protected
following protamination. This is marked by a structural morphogenesis that is heralded by a
striking reduction in nuclear volume. Despite these changes, both human and mouse
spermatozoa maintain low levels of nucleosomes that appear non-randomly distributed
throughout the genome. These regions may be necessary for organizing higher order
genomic structure through interactions with the nuclear matrix. The promoters of this …
following protamination. This is marked by a structural morphogenesis that is heralded by a
striking reduction in nuclear volume. Despite these changes, both human and mouse
spermatozoa maintain low levels of nucleosomes that appear non-randomly distributed
throughout the genome. These regions may be necessary for organizing higher order
genomic structure through interactions with the nuclear matrix. The promoters of this …
Within the sperm nucleus the paternal genome remains functionally inert and protected following protamination. This is marked by a structural morphogenesis that is heralded by a striking reduction in nuclear volume. Despite these changes, both human and mouse spermatozoa maintain low levels of nucleosomes that appear non-randomly distributed throughout the genome. These regions may be necessary for organizing higher order genomic structure through interactions with the nuclear matrix. The promoters of this transcriptionally quiescent genome are differentially marked by modified histones that may poise downstream epigenetic effects. This notion is supported by increasing evidence that the embryo inherits these differing levels of chromatin organization. In concert with the suite of RNAs retained in the mature sperm they may synergistically interact to direct early embryonic gene expression. Irrespective, these features reflect the transcriptional history of spermatogenic differentiation. As such they may soon be utilized as clinical markers of male fertility. In this review we explore and discuss how this may be orchestrated.
pmc.ncbi.nlm.nih.gov
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