Wednesday, November 7, 2007
515y

Forced Unfolding Studies Of Becker Inspired Dystrophin Nano-Constructs

Christine I. Carag1, Nishant Bhasim1, Colin Johnson2, Manu Tewari1, Jennifer Ellmer3, Daniel Safer3, Lee Sweeney3, and Dennis Discher1. (1) Chemical and Biomolecular Engineering, University of Pennsylvania, Towne Bldg. Rm 311A, 220 S. 33rd St., Philadelphia, PA 19104, (2) Institute of Medicine and Engineering, University of Pennsylvania, Towne Bldg. Rm 311A, 220 S. 33rd St., Philadelphia, PA 19104, (3) Pennsylvania Muscle Institute, University of Pennsylvania, Towne Bldg. Rm 311A, 220 S. 33rd St., Philadelphia, PA 19104

Three Becker-inspired dystrophin nano-constructs, representing strong AON-therapy candidates, were examined with force and structural probes. These extensibility and folding studies focused on the altered linker regions introduced by their respective exon deletion(s). Results show that these linker regions fold into stable, spectrin-like domains. Further investigations into the structural dissimilarity among these three nano-constructs and wild-type dystrophin show that the linker regions of two nano-constructs are less stable, and the increased flexibility may impart functionality to these truncated BMD proteins. Structural principles gleaned from these studies were used to design a novel dystrophin construct with increased therapeutic function.