Key result
Alanine-scanning mutagenesis reveals both protein splicing and endonuclease domains of PI-SceI bind DNA substrates.
Why the study?
The interaction between the protein splicing and endonuclease domains of PI-SceI and their roles in DNA binding were not fully understood.
Population
PI-SceI endonuclease and its 31-base pair DNA substrate
Comparison
Alanine-scanning mutagenesis of 49 PI-SceI mutant proteins vs wild-type PI-SceI
Design
Preclinical alanine-scanning mutagenesis study
Authors
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Mutagenesis supports domain-specific PI-SceI-DNA contacts; leaves open broader functional and therapeutic validation.
Experimental evidence demonstrates that both the protein splicing domain and the endonuclease domain of PI-SceI are involved in binding of a DNA substrate.
He et al. (1998) studied this question. Alanine-scanning mutagenesis of PI-SceI vs. Wild-type PI-SceI was evaluated on DNA binding and cleavage properties. Alanine-scanning mutagenesis demonstrated that both the protein splicing domain and the endonuclease domain of PI-SceI are involved in binding its DNA substrate.
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