Probing Protein Structural Dynamics from Residual Dipolar Couplings | De novo determination of protein structure and dynamics from multi-aligning residual dipolar couplings

Ke Ruan

ISBN 10: 383830389X / ISBN 13: 9783838303895

Published by LAP LAMBERT Academic Publishing, 2010

About this Item

Probing Protein Structural Dynamics from Residual Dipolar Couplings | De novo determination of protein structure and dynamics from multi-aligning residual dipolar couplings | Ke Ruan | Taschenbuch | 156 S. | Englisch | 2010 | LAP LAMBERT Academic Publishing | EAN 9783838303895 | Verantwortliche Person für die EU: preigu GmbH & Co. KG, Lengericher Landstr. 19, 49078 Osnabrück, mail[at]preigu[dot]de | Anbieter: preigu.

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Bibliographic Details

• Title: Probing Protein Structural Dynamics from Residual Dipolar Couplings | De novo determination of protein structure and dynamics from multi-aligning residual dipolar couplings
• Publisher: LAP LAMBERT Academic Publishing
• Publication Date: 2010
• Language: English
• ISBN 10: 383830389X
• ISBN 13: 9783838303895
• Binding: Taschenbuch
• Condition: Neu
• Dimensions: 220W x 150H x 10D millimeters 220 millimeters width by 150 millimeters height by 10 millimeters depth
• Weight: 250 grams
• Seller catalogs:
  • Bücher

About this title

Synopsis

Residual dipolar couplings (RDCs) provide explicit information of the molecular structure and dynamics in solution at atomic level. Full utilization of RDC datasets requires the acquisition under multiple aligning conditions, which remains experimentally challenging. We have illustrated in an application to ubiquitin that molecular alignment can be modified by varying the morphological characteristics of a composite medium, composed of ordered bacteriophage Pf1 particles embedded within stretched polyacrylamide gel matrix. The molecular alignment in this composite media could be adjusted by varying the angles between the directors of ordering for the Pf1 and strained gel, or by varying the concentrations of the components or magnesium. Since the acquisition of five independent RDC datasets still remains a difficulty, we develop a protocol that allows for the de novo determination of bond vector orientations from RDC measured in three independent alignment media assuming rigidity. The method proceeds by least squares optimization of both bond orientations and alignment tensors starting from an appropriately chosen initial ‘guess’.

About the Author

Ke Ruan received his B.S. and M.S. from Peking University. He earned his Ph.D. in Chemistry from Johns Hopkins University in 2008, focused on the characterization of protein structural dynamics by residual dipolar couplings. He joined Pfizer thereafter to develop automated structure verification approaches in high throughput NMR system.