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. 1986 Nov;83(21):8137–8141. doi: 10.1073/pnas.83.21.8137

Linking functional domains of the human insulin receptor with the bacterial aspartate receptor.

L Ellis, D O Morgan, D E Koshland Jr, E Clauser, G R Moe, G Bollag, R A Roth, W J Rutter
PMCID: PMC386882  PMID: 3022282

Abstract

A hybrid receptor has been constructed that is composed of the extracellular domain of the human insulin receptor fused to the transmembrane and cytoplasmic domains of the bacterial aspartate chemoreceptor. This hybrid protein can be expressed in rodent (CHO) cells and displays several functional features comparable to wild-type insulin receptor. It is localized to the cell surface, binds insulin with high affinity, forms oligomers, and is recognized by conformation-specific monoclonal antibodies. Although most of the expressed protein accumulates as a 180-kDa proreceptor, some processed 135-kDa receptor can be detected on the cell surface by covalent cross-linking. Expression of the hybrid receptor inhibits the insulin-activated uptake of 2-deoxyglucose by CHO cells. Thus, this hybrid is partially functional and can be processed; however, it is incapable of native transmembrane signaling. The results indicate that the intact domains of different types of receptors can retain some of the native features in a hybrid molecule but specific requirements will need to be satisfied for transmembrane signaling.

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Selected References

These references are in PubMed. This may not be the complete list of references from this article.

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