Navigation Links
Burnham researchers illuminate mechanisms that regulate DNA damage control and replication
Date:1/5/2009

LA JOLLA, Calif., January 5, 2008Scientists at Burnham Institute for Medical Research (Burnham) have demonstrated important new roles for the protein kinase complex Cdc7/Dbf4 or Cdc7/Drf1 (Ddk) in monitoring damage control during DNA replication and reinitiating replication following DNA repair. Since Ddk is often deregulated in human cancers, this new understanding of its role in DNA damage control could help shape new cancer therapies. The research was published in the December 24 issue of Molecular Cell.

Accurate DNA replication is essential for maintaining the stability of the genome. When errors occur, replication halts through a quality control process called the S-phase checkpoint. Replication is only restarted after the errors have been repaired. One of several proteins required for DNA replication, Ddk has long been thought to play an important role in the S-phase checkpoint, despite the lack of definitive evidence. In this study, Burnham researchers show that Ddk actively controls S-phase checkpoint signaling and plays a crucial role in triggering the re-initiation of DNA replication once damage has been repaired.

"This protein kinase complex is not only monitoring DNA replication, it's also monitoring the S-phase checkpoint," says Wei Jiang, Ph.D., the study's principal investigator. "If replication is accurate, then Ddk allows DNA synthesis to continue normally. If there is DNA damage, replication is halted at this checkpoint. The most important thing is to stop replication in order to allow for DNA repair and to avoid catastrophe for the cell. Our study demonstrates that Ddk not only activates the initiation of DNA replication, but it also monitors the checkpoint during DNA damage control and eventually overrides the checkpoint to re-initiates DNA replication."

These findings suggest a highly complex role for Ddk in DNA replication, S-phase checkpoint monitoring and DNA replication re-initiation after repair. The roles of Ddk in controlling the DNA replication machinery for genome stability and fidelity may make it an excellent target for the development of new cancer treatments.


'/>"/>

Contact: Josh Baxt
jbaxt@burnham.org
858-795-5236
Burnham Institute
Source:Eurekalert

Related medicine news :

1. Burnham and HeadNorth Foundation join forces to advance spinal cord research
2. Recent developments at Burnham Institute
3. Recent developments at the Burnham Institute
4. Relocation plan of metastatic cancer cells uncovered by Stanford researchers
5. Researchers at Columbia University Medical Center link blood sugar to normal cognitive aging
6. Researchers create smaller, brighter probe tailored for molecular imaging and tumor targeting
7. Nutritious fast-food kids meals are scarce, researchers find
8. UIC researchers hunting drugs for devastating parasitic disease
9. Indiana University researchers revisit male bisexuality
10. Breast cancer risk varies in young women with benign breast disease, Mayo Clinic researchers say
11. Mayo researchers find potential links between breast density and breast cancer risk
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:5/27/2016)... ... May 27, 2016 , ... W.S. Badger Co. Inc ... that it has been recognized as one of the best small businesses for new ... as one of nine small businesses providing progressive benefits to new parents on the ...
(Date:5/27/2016)... NY (PRWEB) , ... May 27, 2016 , ... ... casual readers, this installment is bolstered by inspiring human-interest stories, courtesy of awareness-driven ... tech within the industry, from leading advocates, associations and industry leaders such as ...
(Date:5/27/2016)... ... 27, 2016 , ... Aimed at nurses and employees in the health care ... leaders in the nursing and health care industry. It also provides insight to the ... University. , As the nursing industry is coming out of one of the ...
(Date:5/26/2016)... ... 2016 , ... There are many ways to cook a hot dog, but ... Americans prefer their dogs straight off the grill. Of the 90 percent of Americans ... to cook a hot dog, far outpacing other cooking methods such as steaming (12 ...
(Date:5/26/2016)... Georgia (PRWEB) , ... May 26, 2016 , ... ... certificate in intellectual property (IP) to its specialty academic programs. , Answering to ... the college’s existing certificate programs in health law, and environmental and land use ...
Breaking Medicine News(10 mins):
(Date:5/24/2016)... LONDON , May 24, 2016 ... erfüllt beide primären Endpunkte ... und Überlegenheit in ‚ausgezeichneter plus guter ... aufsteigenden Colons    ,      (Logo: ... B.V. gab heute neue positive Daten von der ...
(Date:5/24/2016)... Zealand , May 24, 2016 ... informatics solutions for the healthcare sector, has been named the ... Zealand Hi-Tech Awards 2016. Dr Bruce Davey ... acknowledgement for our team.  It,s really good to be recognised ... healthcare internationally. Our products are used in 35 countries around ...
(Date:5/24/2016)... -- Joe Marziani has joined VMS BioMarketing as senior vice president of sales, announced ... role, Marziani will lead the company,s business development and sales team, exploring new opportunities ... Photo - http://photos.prnewswire.com/prnh/20160523/371089 ... ... ...
Breaking Medicine Technology: