Journal
METHODS
Volume 35, Issue 4, Pages 328-337Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.ymeth.2004.10.004
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Proteins following the secretory pathway acquire their proper tertiary and in certain cases also quaternary structures in the endoplasmic reticulum (ER). Incompletely folded species are retained in the ER and eventually degraded. One of the molecular mechanisms by which cells achieve this conformational sorting is based on monoglucosylated N-glycans (Glc(1)Man(5-9)GlcNAc(2)) present on nascent glycoproteins in the ER. This chapter discusses two of the steps that regulate the abundance of such N-glycan structures, including glycoprotein deglucosylation (by glucosidase II) and reglucosylation (by the UDP-Glc:glycoprotein glucosyltransferase), as well as an overview of methods to evaluate the N-glycans prevalent during glycoprotein biogenesis in the ER. (c) 2004 Elsevier Inc. All rights reserved.
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