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|Title: ||Reconstitution of a nanomachine driving the assembly of proteins into bacterial outer membranes|
|Authors: ||Shen, H-H|
|Issue Date: ||24-Oct-2014|
|Publisher: ||Macmillan Publishers Limited, part of Springer Nature.|
|Citation: ||Shen, H.-H., Leyton, D. L., Shiota, T., Belousoff, M. J., Noinaj, N., Lu, J., . . . Lithgow, T. (2014). Reconstitution of a nanomachine driving the assembly of proteins into bacterial outer membranes. Nature Communications, 5. doi: http://dx.doi.org/10.1038/ncomms6078|
|Abstract: ||In biological membranes, various protein secretion devices function as nanomachines, and measuring the internal movements of their component parts is a major technological challenge. The translocation and assembly module (TAM) is a nanomachine required for virulence of bacterial pathogens. We have reconstituted a membrane containing the TAM onto a gold surface for characterization by quartz crystal microbalance with dissipation (QCM-D) and magnetic contrast neutron reflectrometry (MCNR). The MCNR studies provided structural resolution down to 1 Å, enabling accurate measurement of protein domains projecting from the membrane layer. Here we show that dynamic movements within the TamA component of the TAM are initiated in the presence of a substrate protein, Ag43, and that these movements recapitulate an initial stage in membrane protein assembly. The reconstituted system provides a powerful new means to study molecular movements in biological membranes, and the technology is widely applicable to studying the dynamics of diverse cellular nanomachines.|
|Appears in Collections:||Journal Articles|
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