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Structural genomics accelerates protein structure determination
Date:10/27/2010

Proteins are molecular machines that transport substances, catalyze chemical reactions, pump ions, and identify signaling substances. They are chains of amino acids and the individual amino acid sequence is known for many of them. However, the functions a protein can carry out inside the cell are determined by the three-dimensional spatial structure of the protein. Establishing this so-called tertiary structure presents a great challenge to scientists. There is, thus, a lot of catching up to be done in structure analysis. To push progress, the National Institute of General Medical Sciences (NIGMS) of the USA National Institutes of Health (NIH) has invested over 500 million dollars in this field over the last ten years as part of the Protein Structure Initiative with the hope of making significant progress in medicine and biological research.

Informatics professor Burkhard Rost and Marco Punta, Carl von Linde Junior Fellow at the Institute for Advanced Study (IAS) of the TU Mnchen, are involved in this large-scale project. They are affiliated with the New York Consortium on Membrane Protein Structure (NYCOMPS), which is among nine funded membrane research centers. The NYCOMPS scientists put a special emphasis on membrane proteins. That is because they play a key role in pharmacological research. When a pharmaceutical agent enters the cell, it normally interacts first with membrane proteins. Knowing the protein structure is essential to understanding this interaction at the molecular level.

However, in the case of these very important membrane proteins, experimentally deciphering the tertiary structure is particularly difficult. For example the recombinant production of many membrane proteins is a major challenge and purification and crystallization are also difficult steps. The result: although around 25 percent of all proteins are membrane proteins, they account for less than one percent of the total number of proteins with known structures. M
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Contact: Dr. Andreas Battenberg
battenberg@zv.tum.de
49-892-891-0510
Technische Universitaet Muenchen
Source:Eurekalert

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