Increased Aurora B expression reduces substrate phosphorylation and induces chromosomal instability.

Increased Aurora B expression reduces substrate phosphorylation and induces chromosomal instability.
复制标题

DOI:
10.3389/fcell.2022.1018161
复制
发表时间:
2022
影响因子:
5.5
通讯作者:
--
中科院分区:
生物学2区
文献类型:
--
作者:

文献摘要

参考文献

被引文献

相似文献

Aurora B 蛋白表达增加(在癌症中很常见)预计会增加 Aurora B 激酶活性,从而提高 Aurora B 底物的磷酸化程度。相比之下,我们在此表明​​,Aurora B 表达升高会降低三个物种中六种不同 Aurora B 底物的磷酸化,并导致与 Aurora B 抑制一致的缺陷。 Aurora B 及其结合伙伴 INCENP 的复合物反式自磷酸化,以实现 Aurora B 的完全激活。 Aurora B 表达的增加使 INCENP 错误定位,从而降低了 Aurora B:INCENP 复合物在内着丝粒/着丝粒处​​的局部浓度。 INCENP 的共表达可挽救 Aurora B 激酶活性和由 Aurora B 升高引起的有丝分裂缺陷。然而,INCENP 表达在乳腺癌中并不与 Aurora B 一致升高,并且 Aurora B 表达的增加会导致对 Aurora B 抑制剂的耐药性而不是过敏。因此,Aurora B 表达增加会降低而不是增加 Aurora B 激酶活性。
Increased Aurora B protein expression, which is common in cancers, is expected to increase Aurora B kinase activity, yielding elevated phosphorylation of Aurora B substrates. In contrast, here we show that elevated expression of Aurora B reduces phosphorylation of six different Aurora B substrates across three species and causes defects consistent with Aurora B inhibition. Complexes of Aurora B and its binding partner INCENP autophosphorylate in trans to achieve full Aurora B activation. Increased expression of Aurora B mislocalizes INCENP, reducing the local concentration of Aurora B:INCENP complexes at the inner centromere/kinetochore. Co-expression of INCENP rescues Aurora B kinase activity and mitotic defects caused by elevated Aurora B. However, INCENP expression is not elevated in concert with Aurora B in breast cancer, and increased expression of Aurora B causes resistance rather than hypersensitivity to Aurora B inhibitors. Thus, increased Aurora B expression reduces, rather than increases, Aurora B kinase activity.
DOI: 10.1091/mbc.e14-05-0966
发表时间: 2014-09-15
影响因子: 3.3
作者:
Britigan EM;Wan J;Zasadil LM;Ryan SD;Weaver BA
通讯作者: Weaver BA
DOI: 10.1016/j.clml.2013.11.001
发表时间: 2014-06
期刊: Clinical lymphoma, myeloma & leukemia
影响因子: --
作者:
Foran J;Ravandi F;Wierda W;Garcia-Manero G;Verstovsek S;Kadia T;Burger J;Yule M;Langford G;Lyons J;Ayrton J;Lock V;Borthakur G;Cortes J;Kantarjian H
通讯作者: Kantarjian H
DOI: 10.1083/jcb.153.4.865
发表时间: 2001-05-14
期刊: The Journal of cell biology
影响因子: --
作者:
Adams RR;Maiato H;Earnshaw WC;Carmena M
通讯作者: Carmena M
DOI: 10.1083/jcb.105.5.2053
发表时间: 1987-11
期刊: The Journal of cell biology
影响因子: --
作者:
Cooke CA;Heck MM;Earnshaw WC
通讯作者: Earnshaw WC