Reverse engineering of the giant muscle protein titin

Hongbin Li, Wolfgang A. Linke, Andres F. Oberhauser, Mariano Carrion-Vazquez, Jason G. Kerkvliet, Hui Lu, Piotr E. Marszalek, Julio M. Fernandez

Research output: Contribution to journalArticlepeer-review

432 Scopus citations


Through the study of single molecules it has become possible to explain the function of many of the complex molecular assemblies found in cells. The protein titin provides muscle with its passive elasticity. Each titin molecule extends over half a sarcomere, and its extensibility has been studied both in situ and at the level of single molecules. These studies suggested that titin is not a simple entropic spring but has a complex structure-dependent elasticity. Here we use protein engineering and single-molecule atomic force microscopy to examine the mechanical components that form the elastic region of human cardiac titin. We show that when these mechanical elements are combined, they explain the macroscopic behaviour of titin in intact muscle. Our studies show the functional reconstitution of a protein from the sum of its parts.

Original languageEnglish (US)
Pages (from-to)998-1002
Number of pages5
Issue number6901
StatePublished - Aug 29 2002
Externally publishedYes

ASJC Scopus subject areas

  • General


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