Forum for Science, Industry and Business

Sponsored by:     3M 
Search our Site:

 

Discovery opens door for drugs to fight bird flu, other influenza epidemics

27.08.2008
Rutgers, University of Texas at Austin researchers determine 3-D structure of a key site on a flu protein that suppresses human defenses to infection

Researchers at Rutgers University and The University of Texas at Austin have reported a discovery that could help scientists develop drugs to fight the much-feared bird flu and other virulent strains of influenza.

The researchers have determined the three-dimensional structure of a site on an influenza A virus protein that binds to one of its human protein targets, thereby suppressing a person's natural defenses to the infection and paving the way for the virus to replicate efficiently. This so-called NS1 virus protein is shared by all influenza A viruses isolated from humans – including avian influenza, or bird flu, and the 1918 pandemic influenza virus.

A paper detailing this breakthrough discovery appears in the PNAS (Proceedings of the National Academy of Sciences) Early Edition and will be published in an upcoming issue of the PNAS print edition.

About 10 years ago, Professor Robert M. Krug at The University of Texas at Austin discovered that the NS1 protein binds a human protein known as CPSF30, which is important for protecting human cells from flu infection. Once bound to NS1, the human protein can no longer generate molecules needed to suppress flu virus replication. Now, researchers led by Rutgers Professor Gaetano T. Montelione and Krug identified the novel NS1 binding pocket that grasps the human CPSF30 protein.

"Our work uncovers an Achilles heel of influenza A viruses that cause human epidemics and high mortality pandemics," said Montelione, professor of molecular biology and biochemistry. "We have identified the structure of a key target site for drugs that could be developed to effectively combat this disease."

X-ray crystallography, which was carried out by Kalyan Das, Eddy Arnold, LiChung Ma and Montelione, identified the three-dimensional structure of the NS1 binding pocket. "The X-ray crystal structure gives us unique insights into how the NS1 and human protein bind at the atomic level, and how that suppresses a crucial antiviral response," said Das, research professor at Rutgers.

Rei-Lin Kuo, Jesper Marklund, Karen Twu and Krug at The University of Texas at Austin verified the key role of this binding pocket in flu replication by genetically engineering a change to a single amino acid in the NS1 protein's binding pocket, which in turn eliminated the protein's ability to grasp the human protein that is needed to generate antiviral molecules. These investigators then produced a flu virus with an NS1 pocket mutation and showed that this mutated virus does not block host defenses, and as a consequence has a greatly reduced ability to infect human cells.

"These experiments validate the NS1 pocket as a target for antiviral drug discovery," said Krug, professor and chair of molecular genetics and microbiology. "Because this NS1 pocket is highly conserved in all influenza A viruses isolated from humans, a drug targeted to the pocket would be effective against all human influenza A strains, including the bird flu."

This project was supported by two different institutes at the National Institutes of Health (NIH), demonstrating how several NIH initiatives can complement each other. Support for the Rutgers research was provided in part by the Protein Structure Initiative (PSI) of the NIH Institute of General Medical Sciences, a follow-on to the human genome project, which is providing large numbers of protein samples and three-dimensional structures of biologically important proteins to the broad scientific community.

"This work underscores the value of scientific collaborations between large-scale structural centers and individual biomedical research labs," said John Norvell, director of the PSI.

The University of Texas at Austin research was supported by a long-standing grant from the NIH Institute of Allergy and Infectious Disease (NIAID). In addition, NIAID has recently awarded a grant to investigators at The University of Texas at Austin and Rutgers to develop antiviral drugs directed against this NS1 binding pocket.

Other Rutgers faculty members on the research team were James Aramini, Rong Xiao, Li Zhao and Brian Radvansky. Most of the Rutgers investigators are also researchers at the Center for Advanced Biology and Medicine, a joint research institute of Rutgers and the University of Medicine and Dentistry of New Jersey–Robert Wood Johnson Medical School. Krug is also a member of the Institute for Cellular and Molecular Biology at The University of Texas at Austin.

Carl Blesch | EurekAlert!
Further information:
http://www.rutgers.edu
http://www.utexas.edu

More articles from Life Sciences:

nachricht Nonstop Tranport of Cargo in Nanomachines
20.11.2018 | Max-Planck-Institut für molekulare Zellbiologie und Genetik

nachricht Researchers find social cultures in chimpanzees
20.11.2018 | Universität Leipzig

All articles from Life Sciences >>>

The most recent press releases about innovation >>>

Die letzten 5 Focus-News des innovations-reports im Überblick:

Im Focus: Nonstop Tranport of Cargo in Nanomachines

Max Planck researchers revel the nano-structure of molecular trains and the reason for smooth transport in cellular antennas.

Moving around, sensing the extracellular environment, and signaling to other cells are important for a cell to function properly. Responsible for those tasks...

Im Focus: UNH scientists help provide first-ever views of elusive energy explosion

Researchers at the University of New Hampshire have captured a difficult-to-view singular event involving "magnetic reconnection"--the process by which sparse particles and energy around Earth collide producing a quick but mighty explosion--in the Earth's magnetotail, the magnetic environment that trails behind the planet.

Magnetic reconnection has remained a bit of a mystery to scientists. They know it exists and have documented the effects that the energy explosions can...

Im Focus: A Chip with Blood Vessels

Biochips have been developed at TU Wien (Vienna), on which tissue can be produced and examined. This allows supplying the tissue with different substances in a very controlled way.

Cultivating human cells in the Petri dish is not a big challenge today. Producing artificial tissue, however, permeated by fine blood vessels, is a much more...

Im Focus: A Leap Into Quantum Technology

Faster and secure data communication: This is the goal of a new joint project involving physicists from the University of Würzburg. The German Federal Ministry of Education and Research funds the project with 14.8 million euro.

In our digital world data security and secure communication are becoming more and more important. Quantum communication is a promising approach to achieve...

Im Focus: Research icebreaker Polarstern begins the Antarctic season

What does it look like below the ice shelf of the calved massive iceberg A68?

On Saturday, 10 November 2018, the research icebreaker Polarstern will leave its homeport of Bremerhaven, bound for Cape Town, South Africa.

All Focus news of the innovation-report >>>

Anzeige

Anzeige

VideoLinks
Industry & Economy
Event News

Optical Coherence Tomography: German-Japanese Research Alliance hosted Medical Imaging Conference

19.11.2018 | Event News

“3rd Conference on Laser Polishing – LaP 2018” Attracts International Experts and Users

09.11.2018 | Event News

On the brain’s ability to find the right direction

06.11.2018 | Event News

 
Latest News

Nonstop Tranport of Cargo in Nanomachines

20.11.2018 | Life Sciences

Researchers find social cultures in chimpanzees

20.11.2018 | Life Sciences

When AI and optoelectronics meet: Researchers take control of light properties

20.11.2018 | Physics and Astronomy

VideoLinks
Science & Research
Overview of more VideoLinks >>>