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Titin as a Chromosomal Protein

  • Cristina Machado
  • Deborah J. Andrew
Chapter
Part of the Advances in Experimental Medicine and Biology book series (AEMB, volume 481)

Abstract

We identified titin as a chromosomal protein using a human autoimmune scleroderma serum. We cloned the corresponding gene in the fruitfly, Droso-phila melanogaster. We have demonstrated that titin is not only expressed and localized in striated muscle but is also distributed uniformly on condensed mitotic chromosomes using multiple antibodies directed against different domains of both Drosophila and vertebrate titin. Titin is a giant sarcomeric protein responsible for the elasticity of striated muscle. Titin may also function as a molecular scaffold during myofibril assembly. We hypothesize that titin is a component of chromosomes that may function to determine chromosome structure and provide elasticity, playing a role similar to that proposed for titin in muscle. We have identified mutations in Drosophila Titin (D-Titin) and are characterizing phenotypes in muscle and chromosomes.

Keywords

Mitotic Chromosome Chromosome Condensation Chromosomal Protein Limb Girdle Muscular Dystrophy Familial Hypertrophic Cardiomyopathy 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer Science+Business Media New York 2000

Authors and Affiliations

  • Cristina Machado
    • 1
  • Deborah J. Andrew
    • 1
  1. 1.Department of Cell Biology and AnatomyThe Johns Hopkins University School of MedicineBaltimoreUSA

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