Words similar to cbp
Example sentences for: cbp
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The role of the coactivators could be just as bridging factors, although some of the members of the p160 family and CBP/p300 present histone acetyltransferase activity [ 34 35 ] . Stat3 is a member of the JAK/STAT signaling pathway, which is a transcription factor itself that after activation binds to specific sequences in DNA to regulate expression of genes related to proliferation, differentiation and cell survival.
The transcriptional regulatory activities of Smad1 in the nucleus are associated with its ability to directly bind to DNA [ 12 ] , its interaction with other DNA-binding transcription factors, such as OAZ, SIP1 and Hoxc-8 [ 13 14 15 ] , and also its interaction with the master transcriptional co-activator CBP/p300 [ 16 ] . Smad4 is an essential functional partner in Smad-regulated transcription and also interacts with CBP/p300 via a domain within the central linker region named as SAD (Smad Activation Domain) [ 13 ] . Since CBP/p300 has intrinsic histone acetyltransferase (HAT) activity and participates in chromatin remodeling, the recruitment of CBP/p300 into the DNA-binding complexes of Smad1 and Smad4 is likely a critical step in Smad-regulated gene activation.
The functional significance of SNIP1 degradation is apparent, since SNIP1 is a constitutive interactor and functional repressor of the master transcription co-activator CBP/p300 [ 25 ] . In the BMP signaling pathways, SNIP1 is a potent inhibitor of Smad-responsive genes via inhibiting CBP/p300 (Fig.
Structure-function analysis of the NCoAs have revealed multiple copies of a signature motif, LXXLL, with conserved spacing that is required for interaction with nuclear receptors and CBP/p300 [ 99 101 ] . Intriguingly, different LXXLL motifs are required for PPARγ (Peroxisome Proliferator activated receptor γ, a gene down-regulated in Tat expressing cells; Acc# L07592, Table 1) function in response to different classes of ligands, suggesting distinct configuration of assembled complexes.
Thus the down-regulation of SNIP1 likely leads to the liberation of CBP/p300 and directly contributes to the well-known transcriptional modulator functions of Smad1 and Smad4.
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