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Mount Sinai researchers discover new way diseases develop
Date:7/8/2010

Researchers from Mount Sinai School of Medicine have identified a previously unknown mechanism by which cells direct gene expression, the process by which information from a gene is used to direct the physical and behavioral development of individuals. The research, which may help scientists gain insight into how muscle and heart diseases develop, is published in the July 8th issue of Nature.

Using a combined approach of structural and molecular biology, a team of researchers led by Ming-Ming Zhou, PhD, Professor and Chair, Structural and Chemical Biology, Mount Sinai School of Medicine, determined that the molecular interactions between proteins are very different than previously thought, and that they play an essential role in the initiation of gene transcription of muscle and the heart. Gene transcription is the first step to gene expression, a cellular process that occurs in response to physiological and environmental stimuli, and is dictated by chemical modifications of the DNA and histones, which are the proteins responsible for packaging the DNA.

Dr. Zhou's team found a new fundamental mechanism in gene transcription through a protein called DPF3b. They learned that DPF3b recognizes gene-activating chemical marks in these histones in a very different way. DPF3b plays a critical role in the copying of genesa crucial part of the transcription processfor muscle growth and heart development.

"This discovery opens new doors in genome biology research, and has broad implications in the field of epigenetics of human biology of health and disease," said Martin Walsh, PhD, Associate Professor, Pediatrics, and Structural and Chemical Biology at Mount Sinai who is also a co-author of the study. "Knowing that there is an additional way our genome is regulated will allow us to understand the molecular basis of certain human disorders that result from dysregulation of gene expression."

Dr. Zhou said that bromodomains, which
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Contact: Mount Sinai Press Office
newsnow@mountsinai.org
212-241-9200
The Mount Sinai Hospital / Mount Sinai School of Medicine
Source:Eurekalert

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