Anti-apoptosis Proteins Mcl-1 and Bcl-xL Have Different p53-Binding Profiles | |
Yao, H. ; Mi, S. ; Gong, W. ; Lin, J. ; Xu, N. ; Perrett, S. ; . . . Feng, Y. | |
刊名 | Biochemistry |
2013 | |
卷号 | 52期号:37页码:6324-6334 |
中文摘要 | One of the transcription-independent mechanisms of the tumor suppressor p53 discovered in recent years involves physical interaction between p53 and proteins of the Bcl-2 family. In this paper, significant differences between the interaction of p53 with Mcl-1 and Bcl-xL were demonstrated by NMR spectroscopy and isothermal titration calorimetry. Bcl-xL was found to bind strongly to the p53 DNA-binding domain (DBD) with a dissociation constant (Kd) of ∼600 nM, whereas Mcl-1 binds to the p53 DBD weakly with a dissociation constant in the mM range. In contrast, the p53 transactivation domain (TAD) binds weakly to Bcl-xL with a Kd ∼ 300−500 μM and strongly to Mcl-1 with a Kd ∼ 10−20 μM. NMR titrations indicate that although the p53 TAD binds to the BH3-binding grooves of both Bcl-xL and Mcl-1, Bcl-xL prefers to bind to the first subdomain (TAD1) in the p53 TAD, and Mcl-1 prefers to bind to the second subdomain (TAD2). Therefore, Mcl-1 and Bcl-xL have different p53-binding profiles. This indicates that the detailed interaction mechanisms are different, although both Mcl-1 and BclxLcan mediate transcription-independent cytosolic roles of p53. The revealed differences in binding sites and binding affinities should be considered when BH3 mimetics are used in cancer therapy development. |
学科主题 | 代谢物组学 |
收录类别 | SCI |
语种 | 英语 |
公开日期 | 2014-03-24 |
内容类型 | 期刊论文 |
源URL | [http://ir.qibebt.ac.cn:8080/handle/337004/1687] |
专题 | 青岛生物能源与过程研究所_代谢物组学团队 |
推荐引用方式 GB/T 7714 | Yao, H.,Mi, S.,Gong, W.,et al. Anti-apoptosis Proteins Mcl-1 and Bcl-xL Have Different p53-Binding Profiles[J]. Biochemistry,2013,52(37):6324-6334. |
APA | Yao, H..,Mi, S..,Gong, W..,Lin, J..,Xu, N..,...&. . . Feng, Y..(2013).Anti-apoptosis Proteins Mcl-1 and Bcl-xL Have Different p53-Binding Profiles.Biochemistry,52(37),6324-6334. |
MLA | Yao, H.,et al."Anti-apoptosis Proteins Mcl-1 and Bcl-xL Have Different p53-Binding Profiles".Biochemistry 52.37(2013):6324-6334. |
个性服务 |
查看访问统计 |
相关权益政策 |
暂无数据 |
收藏/分享 |
除非特别说明,本系统中所有内容都受版权保护,并保留所有权利。
修改评论