University of Pittsburgh study sheds light on how the cell decides precisely where to start copying a gene

More from Baltimore citywire

  • Steel Concrete Reinforcing Bar From the Republic of Turkey: Final Results of Countervailing Duty Administrative Review and Rescission, in Part; 2019 discussed on April 12 by Commerce Department
    0 comments, 1 like
  • Notice of Revocation of Market-Based Rate Authority and Termination of Electric Market-Based Rate Tariff discussed on April 29 by Energy Department
    0 comments, 0 likes
  • Zekelman Industries developing apartment complex in Manor
    0 comments, 0 likes

More in Politics

  • Norton antivirus account login
    28 comments, 131,840 views
  • Liquidity Locking Made Easy
    9 comments, 81,667 views
  • Ang jili178 login ay nagdudulot sa iyo ng mga laro ng slot at karanasan sa laro ng soccer
    2 comments, 45,720 views

Related Blogs

  • Choose A Comfortable Neoprene Boot Is Necessary
    0 comments, 0 likes
  • How Goliath Cranes Transforming the Shipping Industry?
    0 comments, 0 likes
  • Stainless Steel Pipe Suppliers in India
    0 comments, 0 likes

Archives

Social Share

University of Pittsburgh study sheds light on how the cell decides precisely where to start copying a gene

Posted By Baltimore citywire     May 1, 2022    

Body

The first stage of protein production is called transcription, in which a portion of the DNA strand is selected to be unraveled and copied. To initiate transcription, molecular machinery assembles at a defined region of the genome and melts the double stranded DNA, leaving a region of unwound DNA known as a “transcription bubble.” The machinery must then travel down the unwound strand, scanning for a place to begin, and initiate the process of transcription.

To better understand how a transcription start site is selected, researchers led by Craig D. Kaplan at the University of Pittsburgh carried out detailed studies on a common species of yeast, Saccharomyces cerevisiae, used since ancient times in brewing, winemaking and baking. 

Their results, published October 2021 in the journal eLife Sciences, provide new insights into how far a certain protein SSl2 key roles scans in the promoter region, and how often it initiates transcription. The lead author is Tingting Zhao, currently at the Genomics and Bioinformatics Hub, Brigham and Women’s Hospital, Harvard Medical School in Boston.
 

Transcription factor TFIIH
In eukaryotic organisms (those with a distinct cell nucleus), transcription is carried out by a protein known as RNA polymerase POL II. 

For the transcription to start, POL II requires help from at least five specialized proteins called general transcription factors. One of these transcription factors, known as TFIH, already was thought to play a crucial role in finding the start site for transcription. 

However, the exact mechanism of transcription starter site selection (TSS) was not well understood. Kaplan’s team has made progress in this area by studying a protein called Ssl2.

Comments

0 comments