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  • Title: Analysis of p16INK4a and its interaction with CDK4.
    Author: Yang R, Serrano M, Slater J, Leung E, Koeffler HP.
    Journal: Biochem Biophys Res Commun; 1996 Jan 05; 218(1):254-9. PubMed ID: 8573142.
    Abstract:
    The interaction between cyclin-dependent kinase 4 (CDK4) and its inhibitor p16INK4a (p16) was studied by random mutagenesis and yeast two-hybrid system. The gene encoding p16 was mutagenized randomly and the amino acid changes that affect the binding of p16 to CDK4 were identified. Several amino acid residues were shown to be important for the binding and many of these changes occur at residues conserved in all known human p16 family proteins Most of the mutant p16 proteins that failed to bind to CDK4 contained multiple amino acid changes, and these alterations were observed throughout the entire gene with no apparent mutational patterns or hot spots. Some of the mutations that moderately reduced the binding activity severely affected the kinase-inhibitory activity of p16.
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