Biosynthesis of intestinal microvillar proteins. Effect of castanospermine on cell-free synthesis of aminopeptidase N.
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Biosynthesis of intestinal microvillar proteins. Effect of castanospermine on cell-free synthesis of aminopeptidase N. / Danielsen, E M; Olsen, Jørgen.
In: FEBS Letters, Vol. 228, No. 1, 1988, p. 102-4.Research output: Contribution to journal › Journal article › Research › peer-review
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TY - JOUR
T1 - Biosynthesis of intestinal microvillar proteins. Effect of castanospermine on cell-free synthesis of aminopeptidase N.
AU - Danielsen, E M
AU - Olsen, Jørgen
N1 - Keywords: Alkaloids; Aminopeptidases; Animals; Antigens, CD13; Binding Sites; Cell-Free System; Indolizines; Intestine, Small; Microvilli; RNA, Messenger; Swine
PY - 1988
Y1 - 1988
N2 - Pig small intestinal mRNA was translated in a rabbit reticulocyte lysate system supplemented with microsomal membranes. Castanospermine, an inhibitor of glucosidase I, induced a high mannose-glycosylated form of microvillar aminopeptidase N (EC 3.4.11.2) of increased molecular mass, indicating the blocked removal of glucose residues. In contrast to its reduced expression in a mucosal explant system [(1986) Biochem. J. 240, 777-782], this molecular form of aminopeptidase N was at least as abundant in cell-free translation as its normal high mannose-glycosylated counterpart, ruling out degradation taking place in the rough endoplasmic reticulum. Degradation of newly produced, malprocessed enzyme must therefore occur at a later stage during intracellular transport, presumably in the sarcoplasmic reticulum or in transitional elements between this organelle and the Golgi complex.
AB - Pig small intestinal mRNA was translated in a rabbit reticulocyte lysate system supplemented with microsomal membranes. Castanospermine, an inhibitor of glucosidase I, induced a high mannose-glycosylated form of microvillar aminopeptidase N (EC 3.4.11.2) of increased molecular mass, indicating the blocked removal of glucose residues. In contrast to its reduced expression in a mucosal explant system [(1986) Biochem. J. 240, 777-782], this molecular form of aminopeptidase N was at least as abundant in cell-free translation as its normal high mannose-glycosylated counterpart, ruling out degradation taking place in the rough endoplasmic reticulum. Degradation of newly produced, malprocessed enzyme must therefore occur at a later stage during intracellular transport, presumably in the sarcoplasmic reticulum or in transitional elements between this organelle and the Golgi complex.
M3 - Journal article
C2 - 2893745
VL - 228
SP - 102
EP - 104
JO - F E B S Letters
JF - F E B S Letters
SN - 0014-5793
IS - 1
ER -
ID: 6586557