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。
作者:
Giampietro Schiavo;CL Thomas;S. Osborne
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.
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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
影响因子:
3.7
作者:
Haaf, T;Ward, DC
通讯作者:
Ward, DC
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