Animal cells and systems

  • 제1권2호
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  • Pages.317-321
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  • 1997
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  • 1976-8354(pISSN)
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  • 2151-2485(eISSN)
한국통합생물학회 (The Korean Society for Integrative Biology)
권호 표지

The C-terminal Region of Human Tau Protein with Ability of Filament Formation

  • Chung, Sang-Ho (Department of MicroBiology, College of Science and Technology, Mokwon University)
  • 발행 : 1997.06.01
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초록

Tau protein is one of the microtubule-associated proteins in the mammalian brain. In Alzheimer's disease, tau protein is immobilized in the somatodendritic compartment of certain nerve cells, where it forms a part of the paired helical filament (PHF). To understand the role of tau protein in the formation of PHF, a recombinant human tau protein expressed in Escherichia coli and five synthetic peptide fragments (peptide 1 to peptide 5), corresponding to the C-terminal region of tau protein, were prepared and their ability in self-assembly to form filamentous structures was examined. The recombinant human tau protein formed short rod-like structures in 0.1M MES buffer containing 1 mM $MgCI_2$, while a synthetic peptide fragment 1 containing 55 amino acid residues could assemble into a lot of long filamentous structures in water and particularly twisted helical structures in 0.1M MES buffer containing 1 mM $MgCI_2$. This suggests that the C-terminal region possesses a filament-forming ability and may be related to the formation of the helical structure by providing a powerful filament-forming driving force.

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참고문헌

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