Amgen Inc.

Mark M Zukowski

Yitzhak Stabinsky

Michael Levitt

Keith E Langley

Henri Stephen Lichenstein

Linda Owers Narhi

A mutated subtilisin suitable for admixture to washing compositions and exhibiting substantially improved stability over naturally occurring Bacillus serine proteases is prepared by expressing a modified gene encoding subtilisin in Bacillus subtilis. A preferred subtilisin analog product differs from wild-type Bacillus alkaline proteases by having any amino acid, and preferably serine, at position 218 in place of asparagine. The product is preferably produced in a strain of B. subtilis which is mutated to block synthesis of endogenous proteases. The method of replacing an Asn or a Gly in an Asn-Gly sequence in order to improve pH and thermal stability may be applied to other sites in subtilisin and to other proteins as well.

Thermally stable and pH stable subtilisin analogs and method for

A class of subtilisin analogs suitable for admixture to cleaning compositions and having improved stability over naturally occurring Bacillus subtilisins are prepared by expressing a modified gene encoding the subtilisin analog in Bacillus subtilis.

Multiply mutated subtilisins

This disclosure relates to a sucrose inducible expression system. The sucrose inducible expression system comprises a novel plasmid vector having a sacY gene of the sacS locus which binds to a transcription terminator to relieve transcription termination when introduced into a B. subtilis host microorganism.

Sucrose inducible expression systems

Disclosed are DNA sequences encoding N-acetylmuramidase M1, polypeptide products of recombinant expression of these DNA sequences, peptides whose sequences are based upon the amino acid sequences deduced from these DNA sequences, antibodies specific for such proteins and peptides, procedures for the detection and quantitation of such proteins and nucleic acids related thereto, as well as procedures relating to the development of bacteriolytic methods, therapeutic agents, and compositions utilizing N-acetylmuramidase M1.

Nucleic acid encoding N-acetylmuramidase M1

A class of subtilisin analogs suitable for admixture to cleaning compositions and having improved stability over naturally occurring Bacillus subtilisins are prepared by expressing a modified gene encoding the subtilisin analog in Bacillus subtilis. The subtilisin analogs are characterized as having a modified calcium binding site to improve calcium binding and either an Asn or a Gly replaced in any Asn-Gly sequences present in the subtilisin.

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Thousand Oaks, CA, United States of America

Mark M Zukowski