The cadherin–catenin adhesion complex is the central component of the cell–cell adhesion adherens junctions that transmit mechanical stress from cell to cell. We have determined the nanoscale structure of the adherens junction complex formed by the α-catenin•β-catenin•epithelial cadherin cytoplasmic domain (ABE) using negative stain electron microscopy, small-angle X-ray scattering, and selective deuteration/small-angle neutron scattering. The ABE complex is highly pliable and displays a wide spectrum of flexible structures that are facilitated by protein-domain motions in α- and β-catenin. Moreover, the 107-residue intrinsically disordered N-terminal segment of β-catenin forms a flexible “tongue” that is inserted into α-catenin and participates in the assembly of the ABE complex. The unanticipated ensemble of flexible conformations of the ABE complex suggests a dynamic mechanism for sensitivity and reversibility when transducing mechanical signals, in addition to the catch/slip bond behavior displayed by the ABE complex under mechanical tension. Our results provide mechanistic insight into the structural dynamics for the cadherin–catenin adhesion complex in mechanotransduction.
Bush, Martin, et al. "An ensemble of flexible conformations underlies mechanotransduction by the cadherin–catenin adhesion complex." Proceedings of the National Academy of Sciences of the United States of America, vol. 116, no. 43, Oct. 2019. https://doi.org/10.1073/pnas.1911489116
Bush, Martin, Alhanshali, Bashir M., Qian, Shuo, Stanley, Christopher B., Heller, William T., Matsui, Tsutomu, Weiss, Thomas M., Nicholl, Iain D., Walz, Thomas, Callaway, David J. E., & Bu, Zimei (2019). An ensemble of flexible conformations underlies mechanotransduction by the cadherin–catenin adhesion complex. Proceedings of the National Academy of Sciences of the United States of America, 116(43). https://doi.org/10.1073/pnas.1911489116
Bush, Martin, Alhanshali, Bashir M., Qian, Shuo, et al., "An ensemble of flexible conformations underlies mechanotransduction by the cadherin–catenin adhesion complex," Proceedings of the National Academy of Sciences of the United States of America 116, no. 43 (2019), https://doi.org/10.1073/pnas.1911489116
@article{osti_1625048,
author = {Bush, Martin and Alhanshali, Bashir M. and Qian, Shuo and Stanley, Christopher B. and Heller, William T. and Matsui, Tsutomu and Weiss, Thomas M. and Nicholl, Iain D. and Walz, Thomas and Callaway, David J. E. and others},
title = {An ensemble of flexible conformations underlies mechanotransduction by the cadherin–catenin adhesion complex},
annote = {The cadherin–catenin adhesion complex is the central component of the cell–cell adhesion adherens junctions that transmit mechanical stress from cell to cell. We have determined the nanoscale structure of the adherens junction complex formed by the α-catenin•β-catenin•epithelial cadherin cytoplasmic domain (ABE) using negative stain electron microscopy, small-angle X-ray scattering, and selective deuteration/small-angle neutron scattering. The ABE complex is highly pliable and displays a wide spectrum of flexible structures that are facilitated by protein-domain motions in α- and β-catenin. Moreover, the 107-residue intrinsically disordered N-terminal segment of β-catenin forms a flexible “tongue” that is inserted into α-catenin and participates in the assembly of the ABE complex. The unanticipated ensemble of flexible conformations of the ABE complex suggests a dynamic mechanism for sensitivity and reversibility when transducing mechanical signals, in addition to the catch/slip bond behavior displayed by the ABE complex under mechanical tension. Our results provide mechanistic insight into the structural dynamics for the cadherin–catenin adhesion complex in mechanotransduction.},
doi = {10.1073/pnas.1911489116},
url = {https://www.osti.gov/biblio/1625048},
journal = {Proceedings of the National Academy of Sciences of the United States of America},
issn = {ISSN 0027-8424},
number = {43},
volume = {116},
place = {United States},
publisher = {National Academy of Sciences},
year = {2019},
month = {10}}
Oak Ridge National Laboratory (ORNL), Oak Ridge, TN (United States); SLAC National Accelerator Lab., Menlo Park, CA (United States)
Sponsoring Organization:
National Center for Research Resources; National Institutes of Health (NIH); National Science Foundation (NSF); USDOE Office of Science (SC), Basic Energy Sciences (BES); USDOE Office of Science (SC), Biological and Environmental Research (BER)
Grant/Contract Number:
AC02-76SF00515
OSTI ID:
1625048
Alternate ID(s):
OSTI ID: 1761767
Journal Information:
Proceedings of the National Academy of Sciences of the United States of America, Journal Name: Proceedings of the National Academy of Sciences of the United States of America Journal Issue: 43 Vol. 116; ISSN 0027-8424
Nuclear Instruments and Methods in Physics Research Section A: Accelerators, Spectrometers, Detectors and Associated Equipment, Vol. 764https://doi.org/10.1016/j.nima.2014.07.029