Evidence that dynamin-2 functions as a signal-transducing GTPase.
Evidence that dynamin-2 functions as a signal-transducing GTPase.
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DOI:
10.1083/jcb.150.1.145
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发表时间:
2000-07-10
期刊:
影响因子:
--
通讯作者:
Damke H
中科院分区:
文献类型:
--
作者:
Fish KN;Schmid SL;Damke H
The role of dynamin GTPases in the regulation of receptor-mediated endocytosis is well established. Here, we present new evidence that the ubiquitously expressed isoform dynamin-2 (dyn2) can also function in a signal transduction pathway(s). A ≤5-fold increase of dyn2 relative to endogenous levels activates the transcription factor p53 and induces apoptosis, as demonstrated by reduced cell proliferation, DNA fragmentation, and caspase-3 activation. Dyn2-triggered apoptosis occurs only in dividing cells and is p53 dependent. A mutant defective in GTP binding does not trigger apoptosis, indicating that increased levels of dyn2·GTP, rather than protein levels per se, are required to transduce signals that activate p53. A truncated dyn2 lacking the COOH-terminal proline/arginine-rich domain (PRD), which interacts with many SH3 domain-containing partners implicated in both endocytosis and signal transduction, triggers apoptosis even more potently than the wild-type. This observation provides additional support for the importance of the NH2-terminal GTPase domain for the apoptotic phenotype. All described effects are dyn2-specific because >200-fold overexpression of dyn1, the 70% identical neuronal isoform, has no effect. Our data suggest that dyn2 can act as a signal transducing GTPase affecting transcriptional regulation.
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影响因子:
7.8
作者:
Damke, H;Baba, T;Warnock, D E;Schmid, S L
通讯作者:
Schmid, S L
影响因子:
4.8
作者:
Ahn, S;Maudsley, S;Daaka, Y
通讯作者:
Daaka, Y
影响因子:
3.7
作者:
Chen, WP;Huang, S;Cooper, NR
通讯作者:
Cooper, NR
影响因子:
2.7
作者:
Kasai, K;Shin, HW;Nakayama, K
通讯作者:
Nakayama, K
DOI:
10.1073/pnas.93.24.14106
发表时间:
1996-11-26
影响因子:
11.1
作者:
Jones, SN;Sands, AT;Bradley, A
通讯作者:
Bradley, A