Featured Research

from universities, journals, and other organizations

How bacteria exploit proteins to trigger potentially lethal infections

Date:
May 2, 2014
Source:
University of York
Summary:
The way bacteria exploits human proteins during infections has recently become better understood, thanks to new research. Scientists studied how Staphylococcus aureus, which can cause life-threatening human infections, attach to two proteins fibronectin and fibrinogen found in human blood. The human proteins play important roles in clot formation and wound healing and the bacteria appear to exploit them during the process of infection.

New research by scientists at the University of York sheds light on how bacteria exploit human proteins during infections.

Related Articles


A research team led by Professor Jennifer Potts, a British Heart Foundation Senior Research Fellow in York's Department of Biology, studied how Staphylococcus aureus, which can cause life-threatening human infections, attach to two proteins fibronectin and fibrinogen found in human blood.

The human proteins play important roles in clot formation and wound healing and the bacteria appear to exploit them during the process of infection.

Scientists had earlier shown that the binding sites for fibrinogen and fibronectin on the S. aureus protein FnBPA appear to "co-operate" in causing the dangerous heart infection infective endocarditis and the latest research suggest how the process occurs. The researchers, who included Vaclav Stemberk and Dr Richard Jones at York and Dr Ruth Massey, a microbiologist at the University of Bath, used X-ray crystallography, biophysical techniques and bacterial assays to investigate the process.

In research published in the Journal of Biological Chemistry, they solved the three dimensional structure of the bacterial protein FnBPA in complex with a small part of the human protein fibrinogen. This work showed that the fibrinogen binding site on FnBPA is close to, but not overlapping with, the binding site for fibronectin.

They then studied the binding of the two human proteins simultaneously to FnBPA and found that binding of fibronectin appears to block binding of fibrinogen to the bacterial protein. It appears that regulation of binding arises due to the close proximity of the fibrinogen and fibronectin binding sites on the bacterial protein and the large size of the human proteins. While the research provides the first biophysical evidence in support of the co-operation previously observed in the infection studies, it is still not clear how these two observations are linked. The scientists are planning further studies.

Professor Potts said: "Bacteria have evolved various mechanisms to exploit human proteins to cause infection. Understanding these mechanisms might not only lead to the development of new therapeutics but can also provide important information regarding the normal role of these human proteins in the body."

Dr Sanjay Thakrar, Research Advisor at the British Heart Foundation, which co-funded the study, said: "The bacteria studied can cause a wide range of infections including the potentially fatal heart infection known as infective endocarditis.

"This study showed how this bacterium interacts with proteins found in our blood, which may give us an insight into how these deadly heart infections occur. This is an important step towards developing new treatments, but more research is needed to fully understand this interaction."

The research was supported by the British Heart Foundation and the Biotechnology and Biological Sciences Research Council.


Story Source:

The above story is based on materials provided by University of York. Note: Materials may be edited for content and length.


Journal Reference:

  1. Vaclav Stemberk, Richard P.O. Jones, Olga Moroz, Kate E. Atkin, Andrew M. Edwards, Johan P. Turkenburg, Andrew P. Leech, Ruth C. Massey and Jennifer R. Potts. Evidence for Steric Regulation of Fibrinogen binding to Staphylococcus aureus fibronectin-binding protein A (FnBPA). Journal of Biological Chemistry, May 2014 DOI: 10.1074/jbc.M113.543546 jbc.M113.543546

Cite This Page:

University of York. "How bacteria exploit proteins to trigger potentially lethal infections." ScienceDaily. ScienceDaily, 2 May 2014. <www.sciencedaily.com/releases/2014/05/140502102429.htm>.
University of York. (2014, May 2). How bacteria exploit proteins to trigger potentially lethal infections. ScienceDaily. Retrieved October 31, 2014 from www.sciencedaily.com/releases/2014/05/140502102429.htm
University of York. "How bacteria exploit proteins to trigger potentially lethal infections." ScienceDaily. www.sciencedaily.com/releases/2014/05/140502102429.htm (accessed October 31, 2014).

Share This



More Plants & Animals News

Friday, October 31, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Watch Baby Goose Survive A 400-Foot Cliff Dive

Watch Baby Goose Survive A 400-Foot Cliff Dive

Buzz60 (Oct. 31, 2014) For its nature series Life Story, the BBC profiled the barnacle goose, whose chicks must make a daredevil 400-foot cliff dive from their nests to find food. Jen Markham has the astonishing video. Video provided by Buzz60
Powered by NewsLook.com
World's Salamanders At Risk From Flesh-Eating Fungus

World's Salamanders At Risk From Flesh-Eating Fungus

Newsy (Oct. 31, 2014) The import of salamanders around the globe is thought to be contributing to the spread of a deadly fungus. Video provided by Newsy
Powered by NewsLook.com
Alcoholic Drinks In The E.U. Could Get Calorie Labels

Alcoholic Drinks In The E.U. Could Get Calorie Labels

Newsy (Oct. 31, 2014) A health group in the United Kingdom has called for mandatory calorie labels on alcoholic beverages in the European Union. Video provided by Newsy
Powered by NewsLook.com
Malaria Threat in Liberia as Fight Against Ebola Rages

Malaria Threat in Liberia as Fight Against Ebola Rages

AFP (Oct. 31, 2014) Focus on treating the Ebola epidemic in Liberia means that treatment for malaria, itself a killer, is hard to come by. MSF are now undertaking the mass distribution of antimalarials in Monrovia. Duration: 00:38 Video provided by AFP
Powered by NewsLook.com

Search ScienceDaily

Number of stories in archives: 140,361

Find with keyword(s):
Enter a keyword or phrase to search ScienceDaily for related topics and research stories.

Save/Print:
Share:

Breaking News:

Strange & Offbeat Stories


Plants & Animals

Earth & Climate

Fossils & Ruins

In Other News

... from NewsDaily.com

Science News

Health News

Environment News

Technology News



Save/Print:
Share:

Free Subscriptions


Get the latest science news with ScienceDaily's free email newsletters, updated daily and weekly. Or view hourly updated newsfeeds in your RSS reader:

Get Social & Mobile


Keep up to date with the latest news from ScienceDaily via social networks and mobile apps:

Have Feedback?


Tell us what you think of ScienceDaily -- we welcome both positive and negative comments. Have any problems using the site? Questions?
Mobile: iPhone Android Web
Follow: Facebook Twitter Google+
Subscribe: RSS Feeds Email Newsletters
Latest Headlines Health & Medicine Mind & Brain Space & Time Matter & Energy Computers & Math Plants & Animals Earth & Climate Fossils & Ruins