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Differential molecular regulation of processing and membrane expression of Type-I BMP receptors: implications for signaling
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Differential molecular regulation of processing and membrane expression of Type-I BMP receptors: implications for signaling
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Journal Article
Differential molecular regulation of processing and membrane expression of Type-I BMP receptors: implications for signaling
2017
Overview
The Type-I bone morphogenetic protein receptors (BMPRs), BMPR1A and BMPR1B, present the highest sequence homology among BMPRs, suggestive of functional similitude. However, sequence elements within their extracellular domain, such as signal sequence or
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-glycosylation motifs, may result in differential regulation of biosynthetic processing and trafficking and in alterations to receptor function. We show that (i) BMPR1A and the ubiquitous isoform of BMPR1B differed in mode of translocation into the endoplasmic reticulum; and (ii) BMPR1A was
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-glycosylated while BMPR1B was not, resulting in greater efficiency of processing and plasma membrane expression of BMPR1A. We further demonstrated the importance of BMPR1A expression and glycosylation in ES-2 ovarian cancer cells, where (i) CRISPR/Cas9-mediated knockout of BMPR1A abrogated BMP2-induced Smad1/5/8 phosphorylation and reduced proliferation of ES-2 cells and (ii) inhibition of
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-glycosylation by site-directed mutagenesis, or by tunicamycin or 2-deoxy-
d
-glucose treatments, reduced biosynthetic processing and plasma membrane expression of BMPR1A and BMP2-induced Smad1/5/8 phosphorylation.
Publisher
Springer International Publishing,Springer Nature B.V
Subject
Actin Cytoskeleton - drug effects
/ Actin Cytoskeleton - metabolism
/ Animals
/ Biomedical and Life Sciences
/ Bone morphogenetic protein 2
/ Bone Morphogenetic Protein 2 - pharmacology
/ Bone morphogenetic protein receptors
/ Bone Morphogenetic Protein Receptors, Type I - metabolism
/ Cell Membrane - drug effects
/ Cell Proliferation - drug effects
/ CRISPR
/ Endoplasmic Reticulum - drug effects
/ Endoplasmic Reticulum - metabolism
/ Glucose
/ Glycosylation - drug effects
/ Homology
/ Humans
/ Neurons
/ Original
/ Protein Folding - drug effects
/ Protein Processing, Post-Translational - drug effects
/ Protein Transport - drug effects
