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High-efficient production and biophysical characterisation of nicastrin and its interaction with APPC100.


ABSTRACT: Nicastrin, the largest member among the four components of the ?-secretase complex, has been identified to be the substrate recognizer for the proteolytic activity of the complex. Here we report that full-length human nicastrin (hNCT) can be obtained by heterologous expression in E. coli. Milligram quantities of the target protein are purified in a two-step purification protocol using affinity chromatography followed by SEC. The FOS-choline 14 purified tetrameric hNCT exhibits a proper folding with 31% ?-helix and 23% ?-sheet content. Thermal stability studies reveal stable secondary and tertiary structure of the detergent purified hNCT. A physical interaction between nicastrin and the ?-secretase substrate APPC100 confirmed the functionality of hNCT as a substrate recognizer.

SUBMITTER: Yu K 

PROVIDER: S-EPMC5343570 | biostudies-literature | 2017 Mar

REPOSITORIES: biostudies-literature

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High-efficient production and biophysical characterisation of nicastrin and its interaction with APPC100.

Yu Kun K   Yang Ge G   Labahn Jörg J  

Scientific reports 20170309


Nicastrin, the largest member among the four components of the γ-secretase complex, has been identified to be the substrate recognizer for the proteolytic activity of the complex. Here we report that full-length human nicastrin (hNCT) can be obtained by heterologous expression in E. coli. Milligram quantities of the target protein are purified in a two-step purification protocol using affinity chromatography followed by SEC. The FOS-choline 14 purified tetrameric hNCT exhibits a proper folding w  ...[more]

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