Reverse engineering of the giant muscle protein titin.
Nature
; 418(6901): 998-1002, 2002 Aug 29.
Article
em En
| MEDLINE
| ID: mdl-12198551
ABSTRACT
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.
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Base de dados:
MEDLINE
Assunto principal:
Proteínas Quinases
/
Engenharia de Proteínas
/
Microscopia de Força Atômica
/
Proteínas Musculares
Limite:
Humans
Idioma:
En
Revista:
Nature
Ano de publicação:
2002
Tipo de documento:
Article
País de afiliação:
Estados Unidos