P57 抑制 CYCLIN A-CDK2 的机制-猫眼课题宝

P57 抑制 CYCLIN A-CDK2 的机制

批准号：

6138540

负责人：

Kevin J. Lumb

金额：

$10.26万

依托单位：

COLORADO STATE UNIVERSITY

依托单位国家：

美国

项目类别：

财政年份：

1997

资助国家：

美国

项目状态：

已结题

起止时间：

1997-01-01 至 2001-12-31

来源：

https://reporter.nih.gov/project-details/6138540

关键词：

analytical ultracentrifugation cell growth regulation cyclin dependent kinase cyclins electrospray ionization mass spectrometry enzyme activity enzyme inhibitors gel mobility shift assay high performance liquid chromatography human tissue protein structure function radionuclides sedimentation equilibrium site directed mutagenesis

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英文摘要

The broad, lone term objective of the proposed research is to understand cell cycle regulation. This may lead to new strategies for the control of health problems associated with the cell cycle, such as cancer and growth defects. p57 can arrest the cell cycle by inhibiting the catalytic activity of cyclin-dependent kinases (Cdks). p57 thus acts as a potential negative growth regulator and candidate tumor suppressor. The proposed research will use modern biophysical and molecular biology techniques to elucidate the mechanism of cyclin A-Cdk2 inhibition by p57. The specific aims are: 1. Determine the composition of the p57 inhibited cyclin A-Cdk2 complex using sedimentation equilibrium. 2. Characterize the structure of the p57 Cdk-inhibition domain by nuclear magnetic resonance. 3. Identify the amino acid residues of p57 that contribute to cyclin A-Cdk2 inhibition by site-directed mutagenesis of p 57. 4. Identify the amino acid residues of cyclin A and/or Cdk2 that interact with p57 by site-directed mutagenesis of cyclin A and Cdk2.

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