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A Guide to Production, Crystallization, and Structure Determination of Human IKK1/α
Published on: November 2, 2018
BLyS BINDS TO B CELLS WITH HIGH AFFINITY AND INDUCES ACTIVATION OF THE TRANSCRIPTION FACTORS NF-kappaB AND ELF-1
P Kanakaraj1, T S Migone, B Nardelli
1Human Genome Sciences, Inc., Rockville, MD, 20850, USA. palanisamy_kanakaraj@hgsi.com
Cytokine
|January 9, 2001
Summary
B lymphocyte stimulator (BLyS) specifically binds to human B cells with high affinity, initiating intracellular signaling pathways. This binding activates key transcription factors and induces gene expression, highlighting BLyS
Area of Science:
- Immunology
- Molecular Biology
Background:
- B lymphocyte stimulator (BLyS) is a TNF family protein involved in B cell regulation.
- BLyS exists as membrane-bound and soluble forms, produced by myeloid cells.
Purpose of the Study:
- To characterize the binding of radiolabeled BLyS to its receptor on human B cells.
- To investigate the intracellular events triggered by BLyS binding.
Main Methods:
- Gel filtration chromatography and light scattering analysis to determine BLyS structure.
- Equilibrium binding assays using radiolabeled BLyS and purified human B cells.
- Scatchard analysis to quantify binding affinity and site number.
- Analysis of NF-kappaB and ELF-1 activation, and PLK mRNA induction.
Main Results:
- BLyS forms a homotrimer in solution.
- Specific, saturable binding of BLyS to human B cells was observed.
- High-affinity binding with approximately 2600 sites per cell and a K(D) of 0.1 nM.
- BLyS binding activated NF-kappaB and ELF-1, and induced PLK mRNA.
Conclusions:
- BLyS exhibits high-affinity binding to a specific receptor on human B cells.
- BLyS binding initiates intracellular signaling cascades, including transcription factor activation and gene induction.
- These findings elucidate the molecular mechanism of BLyS action on B lymphocytes.
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