Boschert V

Branschädel M

Holeiter G

Krippner-Heidenreich A

Mann DA

Messerschmidt S

Osswald S

Richter C

Scheurich P

Tepperink J

Zappe A

The family of tumor necrosis factor receptors (TNFRs) and their ligands form a regulatory signaling network that controls immune responses. Various members of this receptor family respond differently to the soluble and membrane-bound forms of their respective ligands. However, the determining factors and underlying molecular mechanisms of this diversity are not yet understood. Using an established system of chimeric TNFRs and novel ligand variants mimicking the bioactivity of membrane-bound TNF (mTNF), we demonstrate that the membrane-proximal extracellular stalk regions of TNFR1 and TNFR2 are crucial in controlling responsiveness to soluble TNF (sTNF). We show that the stalk region of TNFR2, in contrast to the corresponding part of TNFR1, efficiently inhibits both the receptor\u27s enrichment/clustering in particular cell membrane regions and ligand-independent homotypic receptor preassembly, thereby preventing sTNF-induced, but not mTNF-induced, signaling. Thus, the stalk regions of the two TNFRs not only have implications for additional TNFR family members, but also provide potential targets for therapeutic intervention

Newcastle University E-Prints

The Tumor Necrosis Factor Receptor Stalk Regions Define Responsiveness to Soluble versus Membrane-Bound Ligand

The Tumor Necrosis Factor Receptor Stalk Regions Define Responsiveness to Soluble versus Membrane-Bound Ligand

Abstract

Similar works

Full text

Available Versions

Newcastle University E-Prints