transparent gif

 

Ej inloggad.

Göteborgs universitets publikationer

A Proposed Time-Resolved X-Ray Scattering Approach to Track Local and Global Conformational Changes in Membrane Transport Proteins

Författare och institution:
Magnus Andersson (Institutionen för kemi- och bioteknik, Molekylär mikroskopi, Chalmers); J. Vincent (-); David van der Spoel (-); Jan Davidsson (-); Richard Neutze (Institutionen för kemi)
Publicerad i:
Structure, 16 ( 1 ) s. 21-28
ISSN:
0969-2126
Publikationstyp:
Artikel, refereegranskad vetenskaplig
Publiceringsår:
2008
Språk:
engelska
Fulltextlänk:
Sammanfattning (abstract):
Time-resolved X-ray scattering has emerged as a powerful technique for studying the rapid structural dynamics of small molecules in solution. Membrane-protein-catalyzed transport processes frequently couple large-scale conformational changes of the transporter with local structural changes perturbing the uptake and release of the transported substrate. Using light-driven halide ion transport catalyzed by halorhodopsin as a model system, we combine molecular dynamics simulations with X-ray scattering calculations to demonstrate how small-molecule time-resolved X-ray scattering can be extended to the study of membrane transport processes. In particular, by introducing strongly scattering atoms to label specific positions within the protein and substrate, the technique of time-resolved wide-angle X-ray scattering can reveal both local and global conformational changes. This approach simultaneously enables the direct visualization of global rearrangements and substrate movement, crucial concepts that underpin the alternating access paradigm for membrane transport proteins.
Ämne (baseras på Högskoleverkets indelning av forskningsämnen):
NATURVETENSKAP ->
Kemi
NATURVETENSKAP ->
Biologiska vetenskaper ->
Strukturbiologi
Postens nummer:
76649
Ingår i post nr:
Posten skapad:
2008-10-30 11:22
Posten ändrad:
2016-08-16 07:59

Visa i Endnote-format

Göteborgs universitet • Tel. 031-786 0000
© Göteborgs universitet 2007