Abstract:
:The issue of protein dynamics and its implications in the biological function of proteins are arousing greater and greater interest in different fields of molecular biology. In cryo-electron tomography experiments one may take several snapshots of a given biological macromolecule. In principle, a large enough collection of snapshots of the molecule may then be used to calculate its equilibrium configuration in terms of the experimentally accessible degrees of freedom and, hence, to estimate its potential energy. This information would be crucial in order to analyze the biological functions of biomolecules by directly accessing the relevant dynamical indicators. In this article, we analyze the results of cryo-electron tomography experiments performed on monoclonal murine IgG2a antibodies. We measure the equilibrium distribution of the molecule in terms of the relevant angular coordinates and build a mechanical model of the antibody dynamics. This approach enables us to derive an explicit expression of the IgG potential energy. Furthermore, we discuss the configuration space at equilibrium in relation to results from other techniques, and we set our discussion in the context of the current debate regarding conformation and flexibility of antibodies.
journal_name
Proc Natl Acad Sci U S Aauthors
Bongini L,Fanelli D,Piazza F,De Los Rios P,Sandin S,Skoglund Udoi
10.1073/pnas.0400119101keywords:
subject
Has Abstractpub_date
2004-04-27 00:00:00pages
6466-71issue
17eissn
0027-8424issn
1091-6490pii
0400119101journal_volume
101pub_type
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