Tyrosine phosphorylation of insulin receptor substrate-1 in vivo depends upon the presence of its pleckstrin homology region.


To characterize the structural basis for the interactions between the insulin receptor (IR) and its major substrate, insulin receptor substrate-1 (IRS-1), a segment of the NH2-terminal region of IRS-1 (Pro5-Pro65) was deleted. This region contains the first four conserved boxes of a pleckstrin homology (PH) domain, located at the NH2-terminal part of IRS-1… (More)


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