It is hypothesized that nuclear DNA is organized in topologically constrained loop domains defining basic units of higher order chromatin structure. Our studies are performed in order to investigate the functional relevance of this structural subdivision of eukaryotic chromatin for the control of ge
Chromatin organization and virus gene expression
โ Scribed by Paul M. Lieberman
- Publisher
- John Wiley and Sons
- Year
- 2008
- Tongue
- English
- Weight
- 243 KB
- Volume
- 216
- Category
- Article
- ISSN
- 0021-9541
No coin nor oath required. For personal study only.
โฆ Synopsis
Abstract
Many viruses introduce DNA into the hostโcell nucleus, where they must either embrace or confront chromatin factors as a support or obstacle to completion of their life cycle. Compared to the eukaryotic cell, viruses have compact and rapidly evolving genomes. Despite their smaller size, viruses have complex life cycles that involve dynamic changes in DNA structure. Nuclear entry, transcription, replication, genome stabilization, and virion packaging involve complex changes in chromosome organization and structure. Chromatin dynamics and epigenetic modifications play major roles in viral and host chromosome biology. In some cases, viruses may use novel or viralโspecific epigenetic modifying activities, which may reflect variant pathways that distinguish their behavior from the bulk of the cellular chromosome. This review examines several recent discoveries that highlight the role of chromatin dynamics in the life cycle of DNA viruses. J. Cell. Physiol. 216: 295โ302, 2008. ยฉ 2008 WileyโLiss, Inc.
๐ SIMILAR VOLUMES
From 1956, when the complex ultrastructure of meiotic chromosomes was discovered,' until 1985, when the isolation of meiotic chromosome cores was reported, knowledge of the molecular structure of the meiotic chromosome was at best a dream. The dissection of meiotic chromosome structures has become a
## Abstract The multifunctional zincโfinger protein CCCTCโbinding factor (CTCF) is a very strong candidate for the role of coordinating the expression level of coding sequences with their threeโdimensional position in the nucleus, apparently responding to a โcodeโ in the DNA itself. Dynamic interac
Improvements to vaccinia virus expression vectors continue to be made. In particular, there are new methods for the construction of recombinant viruses, ways of increasing the level of gene expression, and vectors that allow the inducible expression of selected genes.
The human brain contains four isoforms of myelin basic protein (MBP), previously identified by cDNA cloning. We have now isolated and characterized genomic clones encoding the human MBP gene. The gene is 45 kb in extent and consists of seven exons. Alternative splicing of the primary MBP transcript