scholarly journals Serum response factor binding sites differ in three human cell types

2007 ◽  
Vol 17 (2) ◽  
pp. 136-144 ◽  
Author(s):  
S. J. Cooper ◽  
N. D. Trinklein ◽  
L. Nguyen ◽  
R. M. Myers
Keyword(s):  
Human Cell ◽  
Binding Sites ◽  
Serum Response Factor ◽  
Cell Types ◽  
Response Factor ◽  
Factor Binding ◽  
Serum Response

scholarly journals Muscle Specificity Encoded by Specific Serum Response Factor-binding Sites

2001 ◽  
Vol 276 (20) ◽  
pp. 17206-17212 ◽  
Author(s):  
Priscilla S. Chang ◽  
Li Li ◽  
John McAnally ◽  
Eric N. Olson
Keyword(s):  
Binding Sites ◽  
Serum Response Factor ◽  
Response Factor ◽  
Factor Binding ◽  
Specific Serum ◽  
Serum Response ◽  
Muscle Specificity

scholarly journals Quantitative Proteomics Identifies Serum Response Factor Binding Protein 1 as a Host Factor for Hepatitis C Virus Entry

Cell Reports ◽  
2015 ◽  
Vol 12 (5) ◽  
pp. 864-878 ◽  
Author(s):  
Gisa Gerold ◽  
Felix Meissner ◽  
Janina Bruening ◽  
Kathrin Welsch ◽  
Paula M. Perin ◽  
...  
Keyword(s):  
Hepatitis C Virus ◽  
Hepatitis C ◽  
Quantitative Proteomics ◽  
Serum Response Factor ◽  
Virus Entry ◽  
Binding Protein ◽  
Host Factor ◽  
Response Factor ◽  
Factor Binding ◽  
Serum Response

scholarly journals The Elk-1 and Serum Response Factor Binding Sites in the Major Immediate-Early Promoter of Human Cytomegalovirus Are Required for Efficient Viral Replication in Quiescent Cells and Compensate for Inactivation of the NF-κB Sites in Proliferating Cells

2010 ◽  
Vol 84 (9) ◽  
pp. 4481-4493 ◽  
Author(s):  
Patrizia Caposio ◽  
Anna Luganini ◽  
Matteo Bronzini ◽  
Santo Landolfo ◽  
Giorgio Gribaudo
Keyword(s):  
Gene Expression ◽  
Viral Replication ◽  
Binding Sites ◽  
Hcmv Infection ◽  
Serum Response Factor ◽  
Response Factor ◽  
Proliferating Cells ◽  
Quiescent Cells ◽  
Serum Response ◽  
Major Immediate Early Promoter

ABSTRACT The major immediate-early promoter (MIEP) region of human cytomegalovirus (HCMV) plays a critical role in the regulation of lytic and latent infections by integrating multiple signals supplied by the infecting virus, the type and physiological state of the host cell, and its extracellular surroundings. The interaction of cellular transcription factors with their cognate binding sites, which are present at high densities within the enhancer upstream from the MIEP core promoter, regulate the rate of IE gene transcription and thus affect the outcome of HCMV infection. We have shown previously that the NF-κB binding sites within the MIEP enhancer and cellular NF-κB activity induced by HCMV infection are required for efficient MIEP activity and viral replication in quiescent cells (P. Caposio, A. Luganini, G. Hahn, S. Landolfo, and G. Gribaudo, Cell. Microbiol. 9:2040-2054, 2007). We now show that the inactivation of either the Elk-1 or serum response factor (SRF) binding site within the enhancer also reduces MIEP activation and viral replication of recombinant HCMV viruses in quiescent fibroblasts. In these cells, we show that the expression of either Elk-1 or SRF is required for optimal IE gene expression, and that the HCMV-stimulated activation of the MEK1/2-ERK1/2 signaling axis leads to Elk-1 transcriptional competency. Furthermore, the replication kinetics of recombinant viruses in which NF-κB, Elk-1, and SRF binding sites all are inactivated demonstrate that the higher levels of Elk-1 and SRF binding to MIEP in proliferating cells can compensate even for a lack of HCMV-induced NF-κB-mediated MIEP transactivation. These observations highlight the importance of the combination of different MIEP binding sites to optimize IE gene expression in cells in different physiological states.

scholarly journals Increased actin polymerization reduces the inhibition of serum response factor activity by Yin Yang 1

2002 ◽  
Vol 364 (2) ◽  
pp. 547-554 ◽  
Author(s):  
Peter D. ELLIS ◽  
Karen M. MARTIN ◽  
Colin RICKMAN ◽  
James C. METCALFE ◽  
Paul R. KEMP
Keyword(s):  
Binding Sites ◽  
Serum Response Factor ◽  
C2c12 Cells ◽  
Response Factor ◽  
P19 Cells ◽  
Lim Kinase ◽  
Yin Yang 1 ◽  
Yin Yang ◽  
Carg Box ◽  
Serum Response

Recent evidence has implicated CC(A/TrichG)GG (CArG) boxes, binding sites for serum response factor (SRF), in the regulation of expression of a number of genes in response to changes in the actin cytoskeleton. In many cases, the activity of SRF at CArG boxes is modulated by transcription factors binding to overlapping (e.g. Yin Yang 1, YY1) or adjacent (e.g. ets) binding sites. However, the mechanisms by which SRF activity is regulated by the cytoskeleton have not been determined. To investigate these mechanisms, we screened for cells that did or did not increase the activity of a fragment of the promoter for a smooth-muscle (SM)-specific gene SM22α, in response to changes in actin cytoskeletal polymerization induced by LIM kinase. These experiments showed that vascular SM cells (VSMCs) and C2C12 cells increased the activity of promoters containing at least one of the SM22α CArG boxes (CArG near) in response to LIM kinase, whereas P19 cells did not. Bandshift assays using a probe to CArG near showed that P19 cells lacked detectable YY1 DNA binding to the CArG box in contrast with the other two cell types. Expression of YY1 in P19 cells inhibited SM22α promoter activity and conferred responsiveness to LIM kinase. Mutation of the CArG box to inhibit YY1 or SRF binding indicated that both factors were required for the LIM kinase response in VSMCs and C2C12 cells. The data indicate that changes in the actin cytoskeletal organization modify SRF activity at CArG boxes by modulating YY1-dependent inhibition.

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