Anti-Serum Response Factor/SRF Antibody Picoband®, HRP Conjugate

Serum response factor, also known as SRF, is a transcription factor protein. This gene encodes a ubiquitous nuclear protein that stimulates both cell proliferation and differentiation. It is a member of the MADS (MCM1, Agamous, Deficiens, and SRF) box superfamily of transcription factors. This protein binds to the serum response element (SRE) in the promoter region of target genes. This protein regulates the activity of many immediate-early genes, for example c-fos, and thereby participates in cell cycle regulation, apoptosis, cell growth, and cell differentiation. This gene is the downstream target of many pathways; for example, the mitogen-activated protein kinase pathway (MAPK) that acts through the ternary complex factors (TCFs). Two transcript variants encoding different isoforms have been found for this gene.

Isoform 1: Detected in thymocytes. Isoform 2: Detected in thymocytes. Isoform 3: Detected in thymocytes. Isoform 4: Not detected in thymocytes. Isoform 5: Detected in thymocytes. Isoform 6: Not detected in thymocytes. Isoform 7: Detected in thymocytes. Isoform 8: Not detected in thymocytes.

Protein tyrosine-protein phosphatase required for T-cell activation through the antigen receptor. Acts as a positive regulator of T-cell coactivation upon binding to DPP4. The first PTPase domain has enzymatic activity, while the second one seems to affect the substrate specificity of the first one. Upon T-cell activation, recruits and dephosphorylates SKAP1 and FYN. Dephosphorylates LYN, and thereby modulates LYN activity. (Microbial infection) Acts as a receptor for human cytomegalovirus protein UL11 and mediates binding of UL11 to T-cells, leading to reduced induction of tyrosine phosphorylation of multiple signaling proteins upon T-cell receptor stimulation and impaired T-cell proliferation.

1. Barron, M. R., Belaguli, N. S., Zhang, S. X., Trinh, M., Iyer, D., Merlo, X., Lough, J. W., Parmacek, M. S., Bruneau, B. G., Schwartz, R. J. Serum response factor, an enriched cardiac mesoderm obligatory factor, is a downstream gene target for Tbx genes. J. Biol. Chem. 280: 11816-11828, 2005. 2. Bell, R. D., Deane, R., Chow, N., Long, X., Sagare, A., Singh, I., Streb, J. W., Guo, H., Rubio, A., Van Nostrand, W., Miano, J. M., Zlokovic, B. V. SRF and myocardin regulate LRP-mediated amyloid-beta clearance in brain vascular cells. Nature Cell Biol. 11: 143-153, 2009. 3. Chang, J., Wei, L., Otani, T., Youker, K. A., Entman, M. L., Schwartz, R. J. Inhibitory cardiac transcription factor, SRF-N, is generated by caspase 3 cleavage in human heart failure and attenuated by ventricular unloading. Circulation 108: 407-413, 2003.

Store at -20℃ for one year from date of receipt. After reconstitution, at 4℃ for one month. It can also be aliquotted and stored frozen at -20℃ for six months. Avoid repeated freeze-thaw cycles.

Western blot, 0.1-0.25μg/ml, Human, Mouse, Rat<br> Immunohistochemistry (Paraffin-embedded Section), 2-5μg/ml, Human, Mouse, Rat<br> Immunocytochemistry/Immunofluorescence, 5μg/ml, Human<br> Flow Cytometry (Fixed), 1-3μg/1x10⁶ cells, Human<br> ELISA, 0.1-0.5μg/ml, -<br>