Abstract
Nogo-B is an isoform of reticulon-4 (RTN4) that distributes mainly in the endoplasmic reticulum. Nogo-B binds to its receptor, Nogo-B receptor (NgBR), to modulate blood vessel formation. Animal with Nogo-B knockout is phenotypically normal. NgBR is a type I receptor with a single transmembrane domain that binds Nogo-B and probably other angiogenic factors. NgBR knockout in zebra fish leads to abnormal formation of intersomite vessels suggesting NgBR plays a more important role in the Nogo-B/NgBR signaling pathway. It is reported that NgBR plays a role in dolichol biosynthesis, protein N-glycosylation, stabilizes Niemann-Pick type C2 protein, regulates intracellular cholesterol trafficking, controls blood vessel development, and modulates breast cancer progression. However, the research in NgBR remains in its early stage and needs further exploration.
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