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Deprecated: Implicit conversion from float 209.6 to int loses precision in C:\Inetpub\vhosts\kidney.de\httpdocs\pget.php on line 534 Cell+Rep 2016 ; 14 (5): 1025-31 Nephropedia Template TP
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Dissecting the Roles of Divergent and Convergent Transcription in Chromosome Instability #MMPMID26804908
Pannunzio NR; Lieber MR
Cell Rep 2016[Feb]; 14 (5): 1025-31 PMID26804908show ga
The interplay of transcription, topological tension and chromosome breakage is a subject of intense interest, but, with so many facets to the problem, difficult to test. Here, we vary the orientation of promoters relative to one another in a yeast system that permits sensitive detection of chromosome breaks. Interestingly, convergent transcription that would direct RNA polymerases into one another does not increase chromosome breakage. In contrast, divergent transcription that would create underwound (potentially single-stranded) DNA does cause a marked increase in chromosome breakage. Furthermore, we examine the role that topoisomerases are playing in preventing genome instability at these promoters and find that Top2 is required to prevent instability at converging promoters.