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Related Experiment Videos

[Primary structure of subtilisin DY].

P Nedkov, W Oberthür, G Braunitzer

    Hoppe-Seyler'S Zeitschrift Fur Physiologische Chemie
    |November 1, 1983
    PubMed
    Summary

    The complete amino acid sequence of subtilisin DY, an alkaline proteinase from Bacillus subtilis, was determined. This research details its structure and compares it to related subtilisin enzymes.

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    Area of Science:

    • Biochemistry
    • Molecular Biology
    • Enzymology

    Context:

    • Subtilisins are serine proteases with significant industrial applications.
    • Understanding enzyme primary structure is crucial for protein engineering and function studies.
    • Bacillus subtilis strain DY produces the extracellular alkaline proteinase, subtilisin DY.

    Purpose:

    • To determine and present the complete amino acid sequence of subtilisin DY.
    • To compare the primary structure of subtilisin DY with subtilisin Carlsberg and subtilisin Novo.

    Summary:

    • The amino acid sequence of subtilisin DY was elucidated using tryptic hydrolysis and chemical cleavage methods.
    • Peptide isolation was achieved via gelfiltration and reversed-phase high-performance liquid chromatography.
    • Automated sequencing and peptide overlapping confirmed the complete 274-residue sequence, revealing 32 replacements versus subtilisin Carlsberg and 82 replacements plus a deletion versus subtilisin Novo.

    Impact:

    • Provides foundational data for understanding subtilisin DY's structure-function relationship.
    • Highlights evolutionary divergence and mutation patterns among subtilisin enzymes.
    • Facilitates comparative analysis and potential protein engineering of Bacillus subtilis proteases.

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