Structure of the nucleotide exchange factor eIF2B reveals mechanism of memory-enhancing molecule
Tsai, J. C., Miller-Vedam, L. E., Anand, A. A., Jaishankar, P., Nguyen, H. C., Renslo, A. R., Frost, A., Walter, P.
American Association for the Advancement of Science (AAAS)
Published 2018
American Association for the Advancement of Science (AAAS)
Published 2018
| Publication Date: |
2018-03-30
|
|---|---|
| Publisher: |
American Association for the Advancement of Science (AAAS)
|
| Print ISSN: |
0036-8075
|
| Electronic ISSN: |
1095-9203
|
| Topics: |
Biology
Chemistry and Pharmacology
Geosciences
Computer Science
Medicine
Natural Sciences in General
Physics
|
| Keywords: |
Biochemistry, Online Only
|
| Published by: |
| _version_ | 1836398871878565888 |
|---|---|
| autor | Tsai, J. C., Miller-Vedam, L. E., Anand, A. A., Jaishankar, P., Nguyen, H. C., Renslo, A. R., Frost, A., Walter, P. |
| beschreibung | Regulation by the integrated stress response (ISR) converges on the phosphorylation of translation initiation factor eIF2 in response to a variety of stresses. Phosphorylation converts eIF2 from a substrate to a competitive inhibitor of its dedicated guanine nucleotide exchange factor, eIF2B, thereby inhibiting translation. ISRIB, a drug-like eIF2B activator, reverses the effects of eIF2 phosphorylation, and in rodents it enhances cognition and corrects cognitive deficits after brain injury. To determine its mechanism of action, we solved an atomic-resolution structure of ISRIB bound in a deep cleft within decameric human eIF2B by cryo–electron microscopy. Formation of fully active, decameric eIF2B holoenzyme depended on the assembly of two identical tetrameric subcomplexes, and ISRIB promoted this step by cross-bridging a central symmetry interface. Thus, regulation of eIF2B assembly emerges as a rheostat for eIF2B activity that tunes translation during the ISR and that can be further modulated by ISRIB. |
| citation_standardnr | 6222166 |
| datenlieferant | ipn_articles |
| feed_id | 25 |
| feed_publisher | American Association for the Advancement of Science (AAAS) |
| feed_publisher_url | http://www.aaas.org/ |
| insertion_date | 2018-03-30 |
| journaleissn | 1095-9203 |
| journalissn | 0036-8075 |
| publikationsjahr_anzeige | 2018 |
| publikationsjahr_facette | 2018 |
| publikationsjahr_intervall | 7984:2015-2019 |
| publikationsjahr_sort | 2018 |
| publisher | American Association for the Advancement of Science (AAAS) |
| quelle | Science |
| relation | http://science.sciencemag.org/cgi/content/short/359/6383/eaaq0939?rss=1 |
| schlagwort | Biochemistry, Online Only |
| search_space | articles |
| shingle_author_1 | Tsai, J. C., Miller-Vedam, L. E., Anand, A. A., Jaishankar, P., Nguyen, H. C., Renslo, A. R., Frost, A., Walter, P. |
| shingle_author_2 | Tsai, J. C., Miller-Vedam, L. E., Anand, A. A., Jaishankar, P., Nguyen, H. C., Renslo, A. R., Frost, A., Walter, P. |
| shingle_author_3 | Tsai, J. C., Miller-Vedam, L. E., Anand, A. A., Jaishankar, P., Nguyen, H. C., Renslo, A. R., Frost, A., Walter, P. |
| shingle_author_4 | Tsai, J. C., Miller-Vedam, L. E., Anand, A. A., Jaishankar, P., Nguyen, H. C., Renslo, A. R., Frost, A., Walter, P. |
| shingle_catch_all_1 | Structure of the nucleotide exchange factor eIF2B reveals mechanism of memory-enhancing molecule Biochemistry, Online Only Regulation by the integrated stress response (ISR) converges on the phosphorylation of translation initiation factor eIF2 in response to a variety of stresses. Phosphorylation converts eIF2 from a substrate to a competitive inhibitor of its dedicated guanine nucleotide exchange factor, eIF2B, thereby inhibiting translation. ISRIB, a drug-like eIF2B activator, reverses the effects of eIF2 phosphorylation, and in rodents it enhances cognition and corrects cognitive deficits after brain injury. To determine its mechanism of action, we solved an atomic-resolution structure of ISRIB bound in a deep cleft within decameric human eIF2B by cryo–electron microscopy. Formation of fully active, decameric eIF2B holoenzyme depended on the assembly of two identical tetrameric subcomplexes, and ISRIB promoted this step by cross-bridging a central symmetry interface. Thus, regulation of eIF2B assembly emerges as a rheostat for eIF2B activity that tunes translation during the ISR and that can be further modulated by ISRIB. Tsai, J. C., Miller-Vedam, L. E., Anand, A. A., Jaishankar, P., Nguyen, H. C., Renslo, A. R., Frost, A., Walter, P. American Association for the Advancement of Science (AAAS) 0036-8075 00368075 1095-9203 10959203 |
| shingle_catch_all_2 | Structure of the nucleotide exchange factor eIF2B reveals mechanism of memory-enhancing molecule Biochemistry, Online Only Regulation by the integrated stress response (ISR) converges on the phosphorylation of translation initiation factor eIF2 in response to a variety of stresses. Phosphorylation converts eIF2 from a substrate to a competitive inhibitor of its dedicated guanine nucleotide exchange factor, eIF2B, thereby inhibiting translation. ISRIB, a drug-like eIF2B activator, reverses the effects of eIF2 phosphorylation, and in rodents it enhances cognition and corrects cognitive deficits after brain injury. To determine its mechanism of action, we solved an atomic-resolution structure of ISRIB bound in a deep cleft within decameric human eIF2B by cryo–electron microscopy. Formation of fully active, decameric eIF2B holoenzyme depended on the assembly of two identical tetrameric subcomplexes, and ISRIB promoted this step by cross-bridging a central symmetry interface. Thus, regulation of eIF2B assembly emerges as a rheostat for eIF2B activity that tunes translation during the ISR and that can be further modulated by ISRIB. Tsai, J. C., Miller-Vedam, L. E., Anand, A. A., Jaishankar, P., Nguyen, H. C., Renslo, A. R., Frost, A., Walter, P. American Association for the Advancement of Science (AAAS) 0036-8075 00368075 1095-9203 10959203 |
| shingle_catch_all_3 | Structure of the nucleotide exchange factor eIF2B reveals mechanism of memory-enhancing molecule Biochemistry, Online Only Regulation by the integrated stress response (ISR) converges on the phosphorylation of translation initiation factor eIF2 in response to a variety of stresses. Phosphorylation converts eIF2 from a substrate to a competitive inhibitor of its dedicated guanine nucleotide exchange factor, eIF2B, thereby inhibiting translation. ISRIB, a drug-like eIF2B activator, reverses the effects of eIF2 phosphorylation, and in rodents it enhances cognition and corrects cognitive deficits after brain injury. To determine its mechanism of action, we solved an atomic-resolution structure of ISRIB bound in a deep cleft within decameric human eIF2B by cryo–electron microscopy. Formation of fully active, decameric eIF2B holoenzyme depended on the assembly of two identical tetrameric subcomplexes, and ISRIB promoted this step by cross-bridging a central symmetry interface. Thus, regulation of eIF2B assembly emerges as a rheostat for eIF2B activity that tunes translation during the ISR and that can be further modulated by ISRIB. Tsai, J. C., Miller-Vedam, L. E., Anand, A. A., Jaishankar, P., Nguyen, H. C., Renslo, A. R., Frost, A., Walter, P. American Association for the Advancement of Science (AAAS) 0036-8075 00368075 1095-9203 10959203 |
| shingle_catch_all_4 | Structure of the nucleotide exchange factor eIF2B reveals mechanism of memory-enhancing molecule Biochemistry, Online Only Regulation by the integrated stress response (ISR) converges on the phosphorylation of translation initiation factor eIF2 in response to a variety of stresses. Phosphorylation converts eIF2 from a substrate to a competitive inhibitor of its dedicated guanine nucleotide exchange factor, eIF2B, thereby inhibiting translation. ISRIB, a drug-like eIF2B activator, reverses the effects of eIF2 phosphorylation, and in rodents it enhances cognition and corrects cognitive deficits after brain injury. To determine its mechanism of action, we solved an atomic-resolution structure of ISRIB bound in a deep cleft within decameric human eIF2B by cryo–electron microscopy. Formation of fully active, decameric eIF2B holoenzyme depended on the assembly of two identical tetrameric subcomplexes, and ISRIB promoted this step by cross-bridging a central symmetry interface. Thus, regulation of eIF2B assembly emerges as a rheostat for eIF2B activity that tunes translation during the ISR and that can be further modulated by ISRIB. Tsai, J. C., Miller-Vedam, L. E., Anand, A. A., Jaishankar, P., Nguyen, H. C., Renslo, A. R., Frost, A., Walter, P. American Association for the Advancement of Science (AAAS) 0036-8075 00368075 1095-9203 10959203 |
| shingle_title_1 | Structure of the nucleotide exchange factor eIF2B reveals mechanism of memory-enhancing molecule |
| shingle_title_2 | Structure of the nucleotide exchange factor eIF2B reveals mechanism of memory-enhancing molecule |
| shingle_title_3 | Structure of the nucleotide exchange factor eIF2B reveals mechanism of memory-enhancing molecule |
| shingle_title_4 | Structure of the nucleotide exchange factor eIF2B reveals mechanism of memory-enhancing molecule |
| timestamp | 2025-06-30T23:33:58.683Z |
| titel | Structure of the nucleotide exchange factor eIF2B reveals mechanism of memory-enhancing molecule |
| titel_suche | Structure of the nucleotide exchange factor eIF2B reveals mechanism of memory-enhancing molecule |
| topic | W V TE-TZ SQ-SU WW-YZ TA-TD U |
| uid | ipn_articles_6222166 |