Essential role of eIF5-mimic protein in animal development is linked to control of ATF4 expression
View/ Open
Author
Hiraishi, Hiroyuki
Oatman, Jamie
Haller, Sherry L.
Blunk, Logan
McGivern, Benton
Morris, Jacob
Gutierrez, Wade
Gordon, Michelle
Bokhari, Wahaj
Ikeda, Yuka
Miles, David
Fellers, John
Asano, Masayo
Tazi, Loubna
Rothenburg, Stefan
Brown, Susan J.
Asano, Katsura
Note: Order does not necessarily reflect citation order of authors.
Published Version
https://doi.org/10.1093/nar/gku670Metadata
Show full item recordCitation
Hiraishi, H., J. Oatman, S. L. Haller, L. Blunk, B. McGivern, J. Morris, E. Papadopoulos, et al. 2014. “Essential role of eIF5-mimic protein in animal development is linked to control of ATF4 expression.” Nucleic Acids Research 42 (16): 10321-10330. doi:10.1093/nar/gku670. http://dx.doi.org/10.1093/nar/gku670.Abstract
Translational control of transcription factor ATF4 through paired upstream ORFs (uORFs) plays an important role in eukaryotic gene regulation. While it is typically induced by phosphorylation of eIF2α, ATF4 translation can be also induced by expression of a translational inhibitor protein, eIF5-mimic protein 1 (5MP1, also known as BZW2) in mammals. Here we show that the 5MP gene is maintained in eukaryotes under strong purifying selection, but is uniquely missing in two major phyla, nematoda and ascomycota. The common function of 5MP from protozoa, plants, fungi and insects is to control translation by inhibiting eIF2. The affinity of human 5MP1 to eIF2β was measured as being equivalent to the published value of human eIF5 to eIF2β, in agreement with effective competition of 5MP with eIF5 for the main substrate, eIF2. In the red flour beetle, Tribolium castaneum, RNA interference studies indicate that 5MP facilitates expression of GADD34, a downstream target of ATF4. Furthermore, both 5MP and ATF4 are essential for larval development. Finally, 5MP and the paired uORFs allowing ATF4 control are conserved in the entire metazoa except nematoda. Based on these findings, we discuss the phylogenetic and functional linkage between ATF4 regulation and 5MP expression in this group of eukaryotes.Other Sources
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4176352/pdf/Terms of Use
This article is made available under the terms and conditions applicable to Other Posted Material, as set forth at http://nrs.harvard.edu/urn-3:HUL.InstRepos:dash.current.terms-of-use#LAACitable link to this page
http://nrs.harvard.edu/urn-3:HUL.InstRepos:13581245
Collections
- HMS Scholarly Articles [17917]
Contact administrator regarding this item (to report mistakes or request changes)