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    • 40. 发明申请
    • CREATION OF DIVERSITY IN POLYPEPTIDES
    • 多糖生物多样性的创造
    • US20080003642A1
    • 2008-01-03
    • US11624750
    • 2007-01-19
    • Allan SvendsenLars Beier
    • Allan SvendsenLars Beier
    • C12P21/04A21D10/00C12N9/00
    • A21D8/042C12N9/1048C12N9/2417C12N15/1027C12N15/1058C12N15/1089
    • The inventors realized that the diversity generated by conventional methods may be limited by steric hindrance between amino acid residues in the three-dimensional structures of the resulting polypeptides. The steric hindrance may occur between amino acid residues at widely different positions in the amino acid sequences, e.g. between residues in two different domains of the 3D structure, and resulting polypeptides which include such steric hindrance may never be observed in the conventional recombination methods because they may be ex-pressed in poor yields or may have poor activity or stability. The inventors developed a method to identify and alleviate such steric hindrance in the resulting polypeptides. In an alignment of the three-dimensional structures, steric hindrance is indicated when residues from two different structures are located within a certain distance. Pairs of residues at corresponding positions in the amino acid sequences are not considered, and residues close to the surface (high solvent accessibility) are considered to be less prone to steric hindrance.
    • 发明人意识到,通过常规方法产生的多样性可能受到所得多肽的三维结构中的氨基酸残基之间的空间位阻的限制。 空间位阻可以发生在氨基酸序列中广泛不同位置的氨基酸残基之间,例如, 在3D结构的两个不同结构域中的残基之间,以及包含这种空间位阻的所得多肽在常规重组方法中可能永远不会被观察到,因为它们可能以较差的产率被压制或者可能具有差的活性或稳定性。 发明人开发了鉴定和减轻所得多肽中这种空间位阻的方法。 在三维结构的排列中,当来自两个不同结构的残基位于一定距离内时,指示空间位阻。 不考虑氨基酸序列中对应位置的残基对,并且靠近表面的残留物(高溶剂可及性)被认为不太容易发生空间位阻。