摘要:
The present invention relates to a method of designing laccase mutants with improved stability properties, which method is based on the hitherto unknown three-dimensional structure of Coprinus cinereus laccase.
摘要:
DNA molecule and process for producing insulin precursors having the formula B(1-29) -H.sub.1 --X.sub.2 --Y.sub.2 --Y.sub.1 --A(1-21), wherein B(1-29) are the 29 first amino acid residues of the B chain of human insulin starting from the N-terminus, A(1-21) are the 21 amino acid residues of the A chain of human insulin, X.sub.1 represents a peptide bond or one naturally-occurring alpha-amino acid acid residues, X.sub.2 represents Glu or Asp, and Y.sub.1 and Y.sub.2 each represent Lys or Arg, the positions A6 and A11, A7 and B7 and A20 and B19, respectively, are connected through sulphur bridges, and, if desired, one or more of the glutamic acid residues in positions A4, A17, B13 and B21 are substituted by another naturally-occurring alpha-amino acid residue having an uncharged side chain, are provided. The insulin precursors are prepared by culturing a yeast strain transformed with a replicable plasmid comprising a DNA sequence encoding an insulin precursor of the above formula in a suitable medium and isolating the insulin precursor thus formed from the culture medium. The insulin precursor can be converted into human insulin or insulin analogues by enzymatic treatment in a manner known per se.
摘要:
The present invention relates to variants of a parent alpha-amylase. The present invention also relates to polynucleotides encoding the variants; nucleic acid constructs, vectors, and host cells comprising the polynucleotides; and methods of using the variants.
摘要:
The inventors have developed a method using protein engineering to produce lipolytic enzymes having a relatively high activity for one ester bond in an amphiphilic substrate with two lipophilic groups) and a relatively low activity for the ester bond in an amphiphilic substrate with one lipophilic group, e.g. a relatively high phospholipase activity and a relatively low lysophospholipase activity.
摘要:
The inventors have modified the amino acid sequence of a maltogenic alpha-amylase to obtain variants with improved properties, based on the three-dimensional structure of the maltogenic alpha-amylase Novamyl. The variants have altered physicochemical properties, e.g. an altered pH optimum, improved thermostability, increased specific activity, an altered cleavage pattern or an increased ability to reduce retrogradation of starch or staling of bread.
摘要:
The present invention relates to hybrid polypeptides having a first amino acid sequence having endo-amylase activity and a second amino acid sequence having carbohydrate binding activity. The present invention also relates to the use of the hybrid polypeptides in starch processing and baking.
摘要:
The invention relates to a variant of a parent fungal glucoamylase, which exhibits improved thermal stability and/or increased specific activity using saccharide substrates.
摘要:
The invention relates to a method of preparing a variant of a parent polypeptide comprising: (a) providing an amino acid sequence of a parent polypeptide; (b) substituting at least one amino acid residue at a position in the sequence corresponding to any of positions: 41, 83, 129, 207 or 284 in SEQ ID No: 2; (c) selecting a variant with lipolytic activity, which compared to the parent polypeptide has improved stability, and has an amino acid sequence with at least 60% identity to the mature polypeptide of SEQ ID No: 2; and (d) recovering the variant.
摘要翻译:本发明涉及一种制备亲本多肽的变体的方法,包括:(a)提供亲本多肽的氨基酸序列; (b)在与SEQ ID No:2中的任何位置:41,83,129,207或284中的任一位置相应的序列中的至少一个氨基酸残基取代; (c)选择具有脂肪分解活性的变体,其与亲本多肽相比具有改善的稳定性,并且具有与SEQ ID No:2的成熟多肽具有至少60%同一性的氨基酸序列; 和(d)恢复该变体。
摘要:
The present invention relates to variants (mutants) of parent Termamyl-like alpha-amylases, which variant has alpha-amylase activity and exhibits altered properties relative to the parent alpha-amylase.