Navigation Links
Structure of enzyme against chemical warfare agents determined
Date:1/28/2009

This release is available in German.

The enzyme DFPase from the squid Loligo vulgaris, is able to rapidly and efficiently detoxify chemical warfare agents such as Sarin, which was used in the Tokyo subway attacks in 1995. A detailed understanding of the mechanism by which enzymes catalyze chemical reactions is necessary for efforts aiming to improve their properties. A group of researchers at the University of Frankfurt, the Bundeswehr Institute for Pharmacology and Toxicology in Munich, and Los Alamos National Laboratory in New Mexico, USA, have successfully determined the structure of DFPase using neutron diffraction. They report their findings in the 20 January 2009 issue of the journal Proceedings of the National Academy of Sciences (106(3), 713-718).

The team used the neutron source at Los Alamos National Laboratory, one of only three sources worldwide equipped for protein crystallography. In contrast to structure determination using X-rays, neutrons are able to locate the positions of hydrogen atoms, which make up half of all atoms in proteins, and are crucial for chemical reactions. As X-rays interact with the electron cloud around an atomic nucleus, so heavier elements are more easily seen, while neutrons interact with the atomic nuclei, and atoms in proteins such as hydrogen, oxygen, nitrogen, carbon, and sulfur, all scatter neutrons in a similar manner. Yet despite being so widespread, hydrogen atoms in proteins are quite elusive. As X-rays interact with the electron cloud around an atomic nucleus, hydrogen atoms, with only one electron, are normally invisible in structures. In contrast, neutrons interact with the atomic nuclei, such that atoms in proteins, hydrogen, oxygen, nitrogen, carbon, and sulfur, all scatter neutrons in a similar manner. The two techniques therefore yield complementary information about a protein structure. This information about hydrogen atoms is therefore essential for a basic understanding of the reaction mechanism of DFPase.

Neutron structures of proteins are quite rare and technically demanding, requiring large crystals and long measurement times. Though the first neutron structure of a protein was reported 40 years ago, in 1969, to date only about 20 unique structures have been solved, out of 50000 entries in the Protein Data Bank. " The effort has been absolutely worth it, " says Junior-Prof. Julian Chen, who published this work together with Dr. Marc-Michael Blum and Prof. Heinz Rueterjans. " Based on the results of this study, we can now create targeted changes to DFPase to augment the activity, as well as diversify the substrate range of the enzyme."


'/>"/>

Contact: Julian Chen
chen@chemie.uni-frankfurt.de
49-697-982-9641
Goethe University Frankfurt
Source:Eurekalert

Related biology news :

1. Brain structure assists in immune response, according to Penn vet study
2. HWI scientist first in world to unravel structure of key breast cancer target enzyme
3. Biologists learn structure, mechanism of powerful molecular motor in virus
4. NSF funds research at Illinois on sustainable biofuels infrastructure
5. How we see objects in depth: The brains code for 3-D structure
6. Key to function of dinosaur crests found in brain structure
7. Brain structure provides key to unraveling function of bizarre dinosaur crests
8. Scripps research team solves structure of beneficial virus
9. The structure of the Mre11 protein bound to DNA
10. Structures of important plant viruses determined
11. Carbon nanostructures form the future of electronics and optoelectronics
Post Your Comments:
*Name:
*Comment:
*Email:
(Date:6/7/2016)... 2016  Syngrafii Inc. and San Antonio Credit ... includes integrating Syngrafii,s patented LongPen™ eSignature "Wet" solution ... will result in greater convenience for SACU members ... maintaining existing document workflow and compliance requirements. ... Highlights: ...
(Date:6/2/2016)... June 2, 2016 Perimeter Surveillance ... Unmanned Systems, Physical Infrastructure, Support & Other Service  ... visiongain offers comprehensive analysis of the global ... will generate revenues of $17.98 billion in 2016. ... Inc, a leader in software and hardware technologies for ...
(Date:5/16/2016)... , May 16, 2016   EyeLock LLC ... today announced the opening of an IoT Center of ... strengthen and expand the development of embedded iris biometric ... unprecedented level of convenience and security with unmatched biometric ... one,s identity aside from DNA. EyeLock,s platform uses video ...
Breaking Biology News(10 mins):
(Date:6/23/2016)... ... June 23, 2016 , ... Supplyframe, the ... the Supplyframe Design Lab . Located in Pasadena, Calif., the Design Lab’s ... how hardware projects are designed, built and brought to market. , The Design ...
(Date:6/23/2016)... , June 23, 2016 Apellis ... Phase 1 clinical trials of its complement C3 ... single and multiple ascending dose studies designed to ... (PD) of subcutaneous injection in healthy adult volunteers. ... (SC) either as a single dose (ranging from ...
(Date:6/23/2016)... -- On Wednesday, June 22, 2016, the NASDAQ ... Dow Jones Industrial Average edged 0.27% lower to finish at ... Stock-Callers.com has initiated coverage on the following equities: Infinity Pharmaceuticals ... NKTR ), Aralez Pharmaceuticals Inc. (NASDAQ: ARLZ ... Learn more about these stocks by accessing their free trade ...
(Date:6/23/2016)... ... 2016 , ... Velocity Products, a division of Morris Group, ... exclusively for Okuma CNC machining centers at The International Manufacturing Technology Show, IMTS, ... companies with expertise in toolholding, cutting tools, machining dynamics and distribution, Velocity SMART ...
Breaking Biology Technology: