Nanotechnology Now

Our NanoNews Digest Sponsors

Heifer International

Wikipedia Affiliate Button

Home > Press > Biophysicists propose new approach for membrane protein crystallization

Membrane proteins in a cell membrane (1). The same proteins (2) embedded in nanodiscs and stabilized in a water solution by a specially engineered protein belt. A protein crystal (3). Molecular structure (4) obtained by X-ray crystallography. This structure can be used to discover new drugs or introduce beneficial mutations into the protein.
CREDIT
MIPT Press Office
Membrane proteins in a cell membrane (1). The same proteins (2) embedded in nanodiscs and stabilized in a water solution by a specially engineered protein belt. A protein crystal (3). Molecular structure (4) obtained by X-ray crystallography. This structure can be used to discover new drugs or introduce beneficial mutations into the protein. CREDIT MIPT Press Office

Abstract:
A team of scientists from the Laboratory for Advanced Studies of Membrane Proteins at MIPT, Research Center Jülich (Germany), and Institut de Biologie Structurale (France) have developed a new approach to membrane protein crystallization.

Biophysicists propose new approach for membrane protein crystallization

Moscow, Russia | Posted on March 8th, 2017

For the first time, the scientists showed that membrane proteins trapped in synthetic patches of cell membrane called "nanodiscs" can be transferred into the lipidic cubic phase and crystallized.

The study published in ACS Crystal Growth & Design will enable scientists to crystallize membrane proteins just after their functional studies in defined membrane environments, avoiding the often critical procedure of detergent solubilization, which frequently affects their functionality and structural integrity and makes the proteins noncrystallizable.

Membrane proteins are of great interest to both fundamental research and applied studies (e.g., drug development and optogenetics). They are responsible for many diverse processes in a living cell, controlling cell response to the environment and molecular transport across the cell membrane. They are highly important drug targets and their structures are of great interest to pharmacology. Knowledge of protein structures facilitates the development of new drugs and provides insights into fundamental biological processes. Unfortunately, solving membrane protein structures is a major challenge for structural biology: Out of 7,000 predicted human membrane proteins, structures are only known for a few dozen of them. Due to their amphipathic nature, membrane proteins must be extracted from the cell membrane and solubilized in an aqueous solution to enable biochemical studies and subsequent crystallization. Previously, scientists had to use "soapy" molecules known as detergents to stabilize membrane proteins in a solution. However, these molecules tend to compromize protein stability and functionality, often impairing biophysical and structural analyses.

One of the most outstanding achievements of recent membrane protein studies, was the invention of membrane-mimic nanodiscs for membrane protein handling. Nanodiscs are discoidal fragments of the cell membrane, surrounded by an engineered protein "belt" to stabilize them in a water solution. Interestingly, our body also uses similar particles, called lipoproteins, to transport "bundles" of lipids and cholesterol molecules through blood vessels. The notion of using particles of this kind in membrane biochemistry was originally proposed by Stephen Sligar in 2002. Since then, nanodiscs have found numerous applications in biochemical and biophysical studies of membrane proteins. Unlike detergents, nanodiscs provide a more native-like environment for membrane protein refolding and stabilization. Moreover, nanodisc diameter and lipid composition can be varied to mimic cell membrane of specific membrane proteins, making it possible to reconstitute large complexes of membrane proteins in their nearly native state.

Nanodiscs are also widely used to study the structure of membrane proteins using nuclear magnetic resonance (NMR), cryo-electron microscopy, atomic force microscopy, and other methods.

Direct use of membrane proteins embedded in nanodiscs for crystallization would be of great importance for structural biology, however, despite considerable efforts, researches were not yet able to demonstrate that this was possible. Finally, MIPT's scientists found a way to transfer membrane proteins embedded in nanodiscs directly to the lipid based crystallization matrix and grow membrane protein crystals suitable for high resolution X-ray diffraction studies. In the newly proposed approach, nanodiscs harboring membrane proteins "dissolve" in the crystallization matrix, after which crystallization is driven by the properties of the lipidic bilayer phase as a whole. The quality of the crystals obtained in this manner is on par with crystals grown using traditional protocols, but they have the added advantage of maintaining protein molecules in their functional state.

The study published in ASC Crystal Growth & Design was selected for the March issue cover.

"We hope that the method explored in the present work can be applied to the crystallization of membrane proteins in general. A combination of nanodisc-assisted stabilization of membrane proteins with state-of-the-art crystallization techniques could help scientists all over the world to better understand the structure and function of membrane proteins," commented Mikhail Nikolaev, the first author of the paper and a researcher at MIPT's Laboratory for Advanced Studies of Membrane Proteins.

###

The study was supported by the Ministry of Education and Science of the Russian Federation (RFMEFI58716X0026).

####

For more information, please click here

Contacts:
Asya Shepunova

7-916-813-0267

Copyright © Moscow Institute of Physics and Technology

If you have a comment, please Contact us.

Issuers of news releases, not 7th Wave, Inc. or Nanotechnology Now, are solely responsible for the accuracy of the content.

Bookmark:
Delicious Digg Newsvine Google Yahoo Reddit Magnoliacom Furl Facebook

Related Links

RELATED JOURNAL ARTICLE

Related News Press

News and information

Quantum optics allows us to abandon expensive lasers in spectroscopy: Lomonosov Moscow State University scientists have invented a new method of spectroscopy November 21st, 2017

Nano-watch has steady hands November 21st, 2017

Nano Global, Arm Collaborate on Artificial Intelligence Chip to Drive Health Revolution by Capturing and Analyzing Molecular Data in Real Time November 21st, 2017

Nanoparticles could allow for faster, better medicine: Exposure of nanoparticles in the body allows for more effective delivery November 20th, 2017

Crystallography

3-D-printed jars in ball-milling experiments June 29th, 2017

Novel nozzle saves crystals: Double flow concept widens spectrum for protein crystallography March 17th, 2017

Nanocages for gold particles: what is happening inside? March 16th, 2017

Most Complex Nanoparticle Crystal Ever Made by Design: Possible applications include controlling light, capturing pollutants, delivering therapeutics March 2nd, 2017

Govt.-Legislation/Regulation/Funding/Policy

EC Project Aims at Creating and Commercializing Cyber-Physical-System Solutions November 14th, 2017

Nanobiotix presented new clinical and pre-clinical data confirming NBTXR3’s significant potential role in Immuno-Oncology at SITC Annual Meeting November 14th, 2017

Leti Joins DARPA-Funded Project to Develop Implantable Device for Restoring Vision November 9th, 2017

Nanoshells could deliver more chemo with fewer side effects: In vitro study verifies method for remotely triggering release of cancer drugs November 8th, 2017

Possible Futures

Quantum optics allows us to abandon expensive lasers in spectroscopy: Lomonosov Moscow State University scientists have invented a new method of spectroscopy November 21st, 2017

Nano-watch has steady hands November 21st, 2017

Nano Global, Arm Collaborate on Artificial Intelligence Chip to Drive Health Revolution by Capturing and Analyzing Molecular Data in Real Time November 21st, 2017

Nanoparticles could allow for faster, better medicine: Exposure of nanoparticles in the body allows for more effective delivery November 20th, 2017

Nanomedicine

Nanoparticles could allow for faster, better medicine: Exposure of nanoparticles in the body allows for more effective delivery November 20th, 2017

Nanobiotix presented new clinical and pre-clinical data confirming NBTXR3’s significant potential role in Immuno-Oncology at SITC Annual Meeting November 14th, 2017

Arrowhead to Present at 29th Annual Piper Jaffray Healthcare Conference November 14th, 2017

A new way to mix oil and water: Condensation-based method developed at MIT could create stable nanoscale emulsions November 8th, 2017

Discoveries

Quantum optics allows us to abandon expensive lasers in spectroscopy: Lomonosov Moscow State University scientists have invented a new method of spectroscopy November 21st, 2017

Nano-watch has steady hands November 21st, 2017

Nanoparticles could allow for faster, better medicine: Exposure of nanoparticles in the body allows for more effective delivery November 20th, 2017

ICN2 researchers compute unprecedented values for spin lifetime anisotropy in graphene November 17th, 2017

Announcements

Quantum optics allows us to abandon expensive lasers in spectroscopy: Lomonosov Moscow State University scientists have invented a new method of spectroscopy November 21st, 2017

Nano-watch has steady hands November 21st, 2017

Nano Global, Arm Collaborate on Artificial Intelligence Chip to Drive Health Revolution by Capturing and Analyzing Molecular Data in Real Time November 21st, 2017

Nanoparticles could allow for faster, better medicine: Exposure of nanoparticles in the body allows for more effective delivery November 20th, 2017

Interviews/Book Reviews/Essays/Reports/Podcasts/Journals/White papers

Quantum optics allows us to abandon expensive lasers in spectroscopy: Lomonosov Moscow State University scientists have invented a new method of spectroscopy November 21st, 2017

Nano-watch has steady hands November 21st, 2017

Nanoparticles could allow for faster, better medicine: Exposure of nanoparticles in the body allows for more effective delivery November 20th, 2017

ICN2 researchers compute unprecedented values for spin lifetime anisotropy in graphene November 17th, 2017

Nanobiotechnology

Nanoparticles could allow for faster, better medicine: Exposure of nanoparticles in the body allows for more effective delivery November 20th, 2017

Nanobiotix presented new clinical and pre-clinical data confirming NBTXR3’s significant potential role in Immuno-Oncology at SITC Annual Meeting November 14th, 2017

Arrowhead to Present at 29th Annual Piper Jaffray Healthcare Conference November 14th, 2017

Nanoshells could deliver more chemo with fewer side effects: In vitro study verifies method for remotely triggering release of cancer drugs November 8th, 2017

Research partnerships

Nano Global, Arm Collaborate on Artificial Intelligence Chip to Drive Health Revolution by Capturing and Analyzing Molecular Data in Real Time November 21st, 2017

EC Project Aims at Creating and Commercializing Cyber-Physical-System Solutions November 14th, 2017

Leti Joins DARPA-Funded Project to Develop Implantable Device for Restoring Vision November 9th, 2017

Nanoshells could deliver more chemo with fewer side effects: In vitro study verifies method for remotely triggering release of cancer drugs November 8th, 2017

NanoNews-Digest
The latest news from around the world, FREE



  Premium Products
NanoNews-Custom
Only the news you want to read!
 Learn More
NanoTech-Transfer
University Technology Transfer & Patents
 Learn More
NanoStrategies
Full-service, expert consulting
 Learn More











ASP
Nanotechnology Now Featured Books




NNN

The Hunger Project