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Journal Article
Research Support, Non-U.S. Gov't
Activation of transcriptional activities of AP-1 and SRE by a new zinc-finger protein ZNF641.
Biochemical and Biophysical Research Communications 2006 January 28
Mitogen-activated protein kinases (MAPKs) are evolutionarily conserved enzymes in cell signal transduction connecting cell-surface receptors to critical regulatory targets within cells and control cell survival, adaptation, and proliferation. Previous studies revealed that zinc-finger proteins are involved in the regulation of the MAPK signaling pathways. Here, we report the identification and characterization of a novel human zinc-finger protein, ZNF641. The cDNA of ZNF641 is 4.9kb, encoding 438 amino acids in the nucleus. The protein is highly conserved in evolution across different vertebrate species from mouse to human. Northern blot analysis indicates that ZNF641 is expressed in most of the examined human tissues, with a high level in skeletal muscle. Overexpression of pCMV-Tag2B-ZNF641 in the COS-7 cells activates the transcriptional activities of AP-1 and SRE. Deletion analysis indicates that the linker between KRAB box and C(2)H(2)-type zinc-fingers represents the basal activation domain. These results suggest that ZNF641 may be a positive regulator in MAPK-mediated signaling pathways that lead to the activation of AP-1 and SRE.
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