Featured Research

from universities, journals, and other organizations

'Molecular switch' discovered in Parkinson's protein

Date:
January 23, 2014
Source:
Kassel, Universität
Summary:
In one variant of Parkinson’s disease, the enzyme LRRK2, plays a central role. Scientists have now discovered a mechanism that controls the activity of LRRK2. This opens up new approaches for the development of drugs to counter the disease, which until now is incurable.

In one variant of Parkinson's disease, the enzyme LRRK2 plays a central role. Scientists at the University of Kassel have now discovered a mechanism that controls the activity of LRRK2. This opens up new approaches for the development of drugs to counter the disease, which until now is incurable.

Following Alzheimer's, Parkinson's disease is the most frequently occurring neuro-degenerative illness. It is estimated that approximately 7 million people suffer from the disease worldwide. A portion of these cases have a hereditary basis and are caused by mutations in specific genes. These so-called familial Parkinson's variants occur with varying degrees of frequency in different ethnic groups; certain mutations are particularly widespread in Italy and Spain, for example. Mutations of a protein called LRRK2 are seen as the most frequent cause of inherited Parkinson's disease.

A research group with scientists from Kassel University has now discovered the "molecular switch" that controls the activity of this protein. "Our results can show ways to develop new drugs to regulate the activity of this protein and thus provide new approaches for the treatment of inherited Parkinson's disease," explains Prof. Dr. Friedrich W. Herberg, head of the Department of Biochemistry at Kassel University. "It may also be possible to derive approaches for the treatment of other variants of Parkinson's from these results."

The protein LRRK2 is also called "dardarin" from the Basque term "dardara" which means "to tremble." In human cells, the protein has a mediating function as it delivers phosphates to other proteins. Dardarin has a special and until now not fully clarified role in certain cells of the midbrain which produce the neurotransmitter dopamine. These cells in the midbrain die in persons suffering from Parkinson's. The resulting lack of dopamine leads to the well-known Parkinson's symptoms such as muscle tremors, depression or the loss of the sense of smell.

The Kassel researchers have investigated individual areas of the enzyme dardarin very closely. "Proteins are made up of smaller building blocks -- amino acids. We were able to determine that in dardarin mutations, which are taken to be responsible for inherited Parkinson's, the phosphate supply is disturbed in an area around the amino acid 1441," explains Dipl. Biol. Kathrin Muda, one of the authors of a study that has now appeared in the journal "Proceedings of the National Academy of Science." "In particular, we found that an additional protein called a 14-3-3 protein can bind in the area 1441 and thus have an effect on the activity of dardarin. In the mutated variants the binding at the dardarin enzyme is disturbed and the activity of dardarin is no longer correctly regulated." How this then results in the dying off of cells in the middle brain is not yet known. "If a way is found to substitute the binding with 14-3-3 through another mechanism that takes the place of the mutated dardarin variants, then we will have taken a big step in the development of anti-Parkinson's drugs," says Muda.

In cooperation with scientists from Tübingen University, from the Helmholtz Center Munich and the German Cancer Research Center Heidelberg, the Kassel researchers make use of so-called mass spectrometry, a process for the weighing of atoms and molecules. Through a comparison of the weight of normal and mutated LRRK2 protein particles, it was possible to draw conclusions about the phosphate supply process in the cells.


Story Source:

The above story is based on materials provided by Kassel, Universität. Note: Materials may be edited for content and length.


Journal Reference:

  1. K. Muda, D. Bertinetti, F. Gesellchen, J. S. Hermann, F. von Zweydorf, A. Geerlof, A. Jacob, M. Ueffing, C. J. Gloeckner, F. W. Herberg. Parkinson-related LRRK2 mutation R1441C/G/H impairs PKA phosphorylation of LRRK2 and disrupts its interaction with 14-3-3. Proceedings of the National Academy of Sciences, 2013; 111 (1): E34 DOI: 10.1073/pnas.1312701111

Cite This Page:

Kassel, Universität. "'Molecular switch' discovered in Parkinson's protein." ScienceDaily. ScienceDaily, 23 January 2014. <www.sciencedaily.com/releases/2014/01/140123075631.htm>.
Kassel, Universität. (2014, January 23). 'Molecular switch' discovered in Parkinson's protein. ScienceDaily. Retrieved September 2, 2014 from www.sciencedaily.com/releases/2014/01/140123075631.htm
Kassel, Universität. "'Molecular switch' discovered in Parkinson's protein." ScienceDaily. www.sciencedaily.com/releases/2014/01/140123075631.htm (accessed September 2, 2014).

Share This




More Health & Medicine News

Tuesday, September 2, 2014

Featured Research

from universities, journals, and other organizations


Featured Videos

from AP, Reuters, AFP, and other news services

Get on Your Bike! London Cycling Popularity Soars Despite Danger

Get on Your Bike! London Cycling Popularity Soars Despite Danger

AFP (Sep. 1, 2014) — Wedged between buses, lorries and cars, cycling in London isn't for the faint hearted. Nevertheless the number of people choosing to bike in the British capital has doubled over the past 15 years. Duration: 02:27 Video provided by AFP
Powered by NewsLook.com
Can You Train Your Brain To Eat Healthy?

Can You Train Your Brain To Eat Healthy?

Newsy (Sep. 1, 2014) — New research says if you condition yourself to eat healthy foods, eventually you'll crave them instead of junk food. Video provided by Newsy
Powered by NewsLook.com
We've Got Mites Living In Our Faces And So Do You

We've Got Mites Living In Our Faces And So Do You

Newsy (Aug. 30, 2014) — A new study suggests 100 percent of adult humans (those over 18 years of age) have Demodex mites living in their faces. Video provided by Newsy
Powered by NewsLook.com
Liberia Continues Fight Against Ebola

Liberia Continues Fight Against Ebola

AFP (Aug. 30, 2014) — Authorities in Liberia try to stem the spread of the Ebola epidemic by raising awareness and setting up sanitation units for people to wash their hands. Duration: 00:41 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:
from the past week

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