Article
A glutamine to proline exchange at amino acid residue 1098 in sucrase causes a temperature-sensitive arrest of sucrase-isomaltase in the endoplasmic reticulum and cis-Golgi.
The Journal of biological chemistry - 2 May 2003
Pröpsting Marcus J, Jacob Ralf, Naim Hassan Y
Abstract excerpt
A striking feature of phenotype II in congenital sucrase-isomaltase deficiency is the retention of the brush border protein sucrase-isomaltase (SI) in the cis-Golgi. This transport block is the consequence of a glutamine to proline substitution at amino acid residue 1098 of the sucrase subunit. Here we provide unequivocal biochemical and confocal data to show that the SI(Q/P) mutant reveals characteristics of a...
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