초록

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Abstract ▼ AI-Helper

Assuming that Asp225 is the substrate specificity determinant of Achromobacter pretense I (APl) which is lysine-specific serine protease, the 225th residue was substituted for other amino acids with a hope that the substrate specificity of a mutant API is altered. Furthermore, to maturate preform of...

Assuming that Asp225 is the substrate specificity determinant of Achromobacter pretense I (APl) which is lysine-specific serine protease, the 225th residue was substituted for other amino acids with a hope that the substrate specificity of a mutant API is altered. Furthermore, to maturate preform of mutant API autocatalytically, Lys(-1) was also replaced by Met, Asp, or Glu. However, all the mutants were not expressed, or accumulated as inactive precursor proteins. This result implicats that Asp225 plays a critical rol in restricted substrate specificity as a lysylendopeptidase but the substrate specificity of API is not determined only by the nature of residue 225.

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