Abstract
Endoplasmic reticulum (ER) stress responses have been demonstrated to play important roles in maintaining various cellular functions and to underlie many tissue dysfunctions. In this study, we identified Sec16B as an ER stress-inducible gene by microarray analysis of brefeldin A (BFA)-inducible genes in a mouse neuroblastoma cell-line, Neuro2a. Sec16B mRNA was induced by treatment with the ER stress-inducing reagents thapsigargin (Tg) and brefeldin A in a time-dependent manner. In the genomic sequence of the mouse Sec16B gene, we found an unfolded protein response element (UPRE), which is well conserved between humans and mice. Using luciferase reporter analyses, we showed that the UPRE in the mouse Sec16B gene was functional and responded well to ER stress-inducing stimuli and spliced XBP1 (sXBP1)-overexpression. In addition, a unique ATF4-responsive sequence within the first intron of the mouse Sec16B gene was characterized. Our study may help to elucidate the regulation of trafficking through the ER–Golgi apparatus and the biogenesis of ER-derived intracellular organelles.
Abbreviations
- ATF4:
-
Activating transcription factor 4
- ATF6:
-
Activating transcription factor 6
- ER:
-
Endoplasmic reticulum
- GADD153:
-
Growth arrest and DNA damage inducible gene 153
- GRP78:
-
78 kDa glucose-regulated protein
- GAPDH:
-
Glyceraldehyde 3-phosphate dehydrogenase
- IRE1:
-
Inositol-requiring enzyme-1
- PERK:
-
PKR-like endoplasmic reticulum kinase
- XBP1:
-
X-box binding protein 1
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Acknowledgements
This work is, in part, supported by Grant-in-aid from the Japan Society for the Promotion of Science (JSPS, Japan, KAKENHI, Nos. 17K19901 and 19H04030 to K.O.).
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KO and HK discussed and designed the research; KO and HK performed experiments; KO and YH wrote the manuscript.
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Oh-hashi, K., Kohno, H. & Hirata, Y. Transcriptional regulation of the ER stress-inducible gene Sec16B in Neuro2a cells. Mol Cell Biochem 476, 35–44 (2021). https://doi.org/10.1007/s11010-020-03883-8
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DOI: https://doi.org/10.1007/s11010-020-03883-8