Mutant epidermal growth factor polypeptides, nucleic acids, and uses therefor
    5.
    发明授权
    Mutant epidermal growth factor polypeptides, nucleic acids, and uses therefor 有权
    突变表皮生长因子多肽,核酸及其用途

    公开(公告)号:US08247531B2

    公开(公告)日:2012-08-21

    申请号:US11725695

    申请日:2007-03-20

    IPC分类号: C07K14/485 A61K38/18

    CPC分类号: C07K14/485 A61K38/00

    摘要: The present invention is based, in part, on our discovery that EGF can be engineered to generate mutants that bind to the EGF receptor (EGFR) of a cell and that have a desirable effect on the activity of the cell. For example, the mutants can agonize the receptor (i.e., increase a biological activity of the receptor), or antagonize the receptor (i.e., decrease or inhibit a biological activity of the receptor). In turn, the rate at which the cell proliferates, for example, can be changed. Moreover, some of these mutants bind EGFR with a higher affinity than wild-type EGF exhibits. The affinity may increase by about, for example, 2-, 5-, 10-, 15-, 20-, 25-, 30-, 50-, or 100-fold relative to wild-type EGF.

    摘要翻译: 本发明部分基于我们的发现,EGF可以被工程化以产生结合细胞的EGF受体(EGFR)的突变体,并且对细胞的活性具有期望的作用。 例如,突变体可以激动受体(即,增加受体的生物活性)或拮抗受体(即降低或抑制受体的生物活性)。 反过来,细胞增殖的速度例如可以改变。 此外,这些突变体中的一些以比野生型EGF显示更高的亲和力结合EGFR。 相对于野生型EGF,亲和力可以增加约例如2-,5-,10-,15-,20-,25-,30-,50-或100倍。

    High affinity TCR proteins and methods
    8.
    发明授权
    High affinity TCR proteins and methods 有权
    高亲和力TCR蛋白和方法

    公开(公告)号:US07569357B2

    公开(公告)日:2009-08-04

    申请号:US10783786

    申请日:2004-02-20

    IPC分类号: G01N33/563 G01N33/53

    摘要: T cell receptors (TCRS) that have higher affinity for a ligand than wild type TCRs are provided. These high affinity TCRs are formed by mutagenizing a T cell receptor protein coding sequence to generate a variegated population of mutants of the T cell receptor protein coding sequence; transforming the T cell receptor mutant coding sequence into yeast cells; inducing expression of the T cell receptor mutant coding sequence on the surface of yeast cells; and selecting those cells expressing T cell receptor mutants that have higher affinity for the peptide/MHC ligand than the wild type T cell receptor protein. The high affinity TCRs can be used in place of an antibody or single chain antibody.

    摘要翻译: 提供了比野生型TCR对配体具有更高亲和力的T细胞受体(TCRS)。 通过诱变T细胞受体蛋白质编码序列产生T细胞受体蛋白编码序列突变体的杂色群体,形成这些高亲和性TCR。 将T细胞受体突变体编码序列转化为酵母细胞; 在酵母细胞表面诱导T细胞受体突变体编码序列的表达; 并选择那些表达与野生型T细胞受体蛋白相比对肽/ MHC配体具有更高亲和力的T细胞受体突变体的细胞。 高亲和性TCR可用于代替抗体或单链抗体。