Nuclear PtdIns(4,5)P2 assembles in a mitotically regulated particle involved in pre-mRNA splicing.

Nuclear PtdIns(4,5)P2 assembles in a mitotically regulated particle involved in pre-mRNA splicing.
复制标题

核 PtdIns(4,5)P2 在参与前 mRNA 剪接的有丝分裂调节颗粒中组装。

DOI:
--
复制
发表时间:
2001
影响因子:
4
通讯作者:
S. Osborne
S. Osborne
中科院分区:
生物学2区
文献类型:
--
作者:
Giampietro Schiavo;CL Thomas;S. Osborne

文献摘要

参考文献

被引文献

相似文献

磷酸肌醇周转调节多种细胞过程。与其众所周知的胞质作用相比,有限的信息可用于核磷酸肌醇的功能。在这里,我们表明,磷脂酰肌醇(4,5)-二磷酸(PtdIns(4,5)P2)稳定地与类似于染色质间颗粒簇的细胞核内的电子致密颗粒。这些含PtdIns(4,5)P2的结构具有细胞周期依赖性的分布,并含有转录和前mRNA加工机制的组分,包括RNA聚合酶II和剪接因子SC-35。免疫耗竭和添加回实验表明,PtdIns(4,5)P2和相关因子是必要的,但不足以在体外前mRNA剪接,表明PtdIns(4,5)P2的复合物在核前mRNA加工的关键作用。
Phosphoinositide turnover regulates multiple cellular processes. Compared with their well-known cytosolic roles, limited information is available on the functions of nuclear phosphoinositides. Here, we show that phosphatidylinositol(4,5)-bisphosphate (PtdIns(4,5)P2) stably associates with electron-dense particles within the nucleus that resemble interchromatin granule clusters. These PtdIns(4,5)P2-containing structures have a distribution which is cell-cycle dependent and contain components of both the transcriptional and pre-mRNA processing machinery, including RNA polymerase II and the splicing factor SC-35. Immunodepletion and add-back experiments demonstrate that PtdIns(4,5)P2 and associated factors are necessary but not sufficient for pre-mRNA splicing in vitro, indicating a crucial role for PtdIns(4,5)P2-containing complexes in nuclear pre-mRNA processing.
DOI: 10.1091/mbc.11.3.799
发表时间: 2000-03-01
影响因子: 3.3
作者:
Pederson, T
通讯作者: Pederson, T
DOI: 10.1016/s0021-9258(17)35799-x
发表时间: 1986-03
期刊: The Journal of biological chemistry
影响因子: --
作者:
R. Zandomeni;M. C. Zandomeni;D. Shugar;R. Weinmann
通讯作者: R. Zandomeni;M. C. Zandomeni;D. Shugar;R. Weinmann
DOI: 10.1006/excr.1996.0124
发表时间: 1996-04-10
影响因子: 3.7
作者:
Haaf, T;Ward, DC
通讯作者: Ward, DC
DOI: 10.1016/s1097-2765(01)80002-2
发表时间: 1999-06-01
期刊: MOLECULAR CELL
影响因子: 16
作者:
Misteli, T;Spector, DL
通讯作者: Spector, DL
DOI: 10.1073/pnas.78.5.2737
发表时间: 1981-01-01
期刊: PROCEEDINGS OF THE NATIONAL ACADEMY OF SCIENCES OF THE UNITED STATES OF AMERICA-BIOLOGICAL SCIENCES
影响因子: --
作者:
LERNER, EA;LERNER, MR;STEITZ, JA
通讯作者: STEITZ, JA