- Li, H. B. and Carrion-Vazquez, M. and Oberhauser, A. F. and Marszalek, P. E. and Fernandez, J. M., Point mutations alter the mechanical stability of immunoglobulin modules,
Nature Structural Biology, vol. 7 no. 12
pp. 1117-1120 .
(last updated on 2007/11/30)
Immunoglobulin-like modules are common components of proteins that play mechanical roles in cells such as muscle elasticity and cell adhesion. Mutations in these proteins may affect their mechanical stability and thus may compromise their function. Using single molecule atomic force microscopy (AFM) and protein engineering, we demonstrate that point mutations in two beta -strands of an immunoglobulin module in human cardiac titin alter the mechanical stability of the protein, resulting in mechanical phenotypes. Our results demonstrate a previously unrecognized class of phenotypes that may be common in cell, adhesion and muscle proteins.