p53突变的原子结构和癌症(Alan Fersht的文章)-中医把脉你能看出来这个?


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送交者: Wood 于 2006-10-13, 16:28:23:

西医的病理药理都是在分子水平. 说白了,凭中医的路数搞不过这个

Structural basis for understanding oncogenic p53 mutations and designing rescue drugs

PNAS | October 10, 2006 | vol. 103 | no. 41 | 15056-15061

The DNA-binding domain of the tumor suppressor p53 is inactivated by mutation in 50% of human cancers. We have solved high-resolution crystal structures of several oncogenic mutants to investigate the structural basis of inactivation and provide information for designing drugs that may rescue inactivated mutants. We found a variety of structural consequences upon mutation: (i) the removal of an essential contact with DNA, (ii) creation of large, water-accessible crevices or hydrophobic internal cavities with no other structural changes but with a large loss of thermodynamic stability, (iii) distortion of the DNA-binding surface, and (iv) alterations to surfaces not directly involved in DNA binding but involved in domain–domain interactions on binding as a tetramer. These findings explain differences in functional properties and associated phenotypes (e.g., temperature sensitivity). Some mutants have the potential of being rescued by a generic stabilizing drug. In addition, a mutation-induced crevice is a potential target site for a mutant-selective stabilizing drug.





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