[No authors listed]
NTE-related esterase (NRE) is a novel endoplasmic reticulum-anchored lysophospholipase with high homology to neuropathy target esterase (NTE). However, little is known about the regulation of NRE protein. In the current study, we investigated the degradation pathways of mouse NRE (mNRE) in mammalian cells. Based on experiments with inhibitors and inducer of protein degradation pathways, we provide here the first evidence that mNRE is degraded by macroautophagy as well as by the proteasome. Moreover, the contribution of protein domains to the degradation of mNRE was investigated, which showed that the transmembrane and regulatory domain played a role in the degradation of mNRE by macroautophagy and the proteasome respectively. In contrast the C-terminal catalytic domain was not involved in both degradation pathways of mNRE. These findings showed for the first time that the degradation pathways in controlling mNRE quantity and may provide further insight into structure and regulation of mNRE.
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