Key result
Point mutations in the Walker motifs of either NBD1 or NBD2 disrupted the gating of cardiac K(ATP) channels, demonstrating that cooperative interaction between both domains is critical for regulation.
The study demonstrates that cooperative interaction between NBD1 and NBD2 of the sulfonylurea receptor is critical for the gating of cardiac ATP-sensitive K+ channels.
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Requires human validation before affecting K(ATP)-targeted therapies; extends mechanistic understanding of NBD cooperativity in animal models.
Zingman et al. (2002) studied K(ATP) channel regulation. Point mutations in Walker motifs of NBD1 and NBD2 was evaluated on K(ATP) channel gating and activation. Point mutations in the Walker motifs of either NBD1 or NBD2 disrupted the gating of cardiac K(ATP) channels, demonstrating that cooperative interaction between both domains is critical for regulation.
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