An Inhibited Conformation for the Protein Kinase Domain of the Saccharomyces cerevisiae AMPK Homolog Snf1
AMP-activated protein kinase (AMPK) is a master metabolic regulator for controlling cellular energy homeostasis. Its homolog in yeast, SNF1, is activated in response to glucose depletion and other stresses. The catalytic ({alpha}) subunit of AMPK/SNF1 in yeast (Snf1) contains a protein Ser/Thr kinase domain (KD), an auto-inhibitory domain (AID) and a region that mediates interactions with the two regulatory ({beta} and {gamma}) subunits. Here, the crystal structure of residues 41-440 of Snf1, which include the KD and AID, is reported at 2.4 {angstrom} resolution. The AID is completely disordered in the crystal. A new inhibited conformation of the KD is observed in a DFG-out conformation and with the glycine-rich loop adopting a structure that blocks ATP binding to the active site.
- Research Organization:
- Brookhaven National Lab. (BNL), Upton, NY (United States). National Synchrotron Light Source
- Sponsoring Organization:
- DOE - OFFICE OF SCIENCE
- DOE Contract Number:
- DE-AC02-98CH10886
- OSTI ID:
- 1020106
- Report Number(s):
- BNL-95955-2011-JA; TRN: US201116%%87
- Journal Information:
- Acta Crystallographica Section F: Structural Biology and Crystallization Communications, Vol. 66, Issue 9; ISSN 1744-3091
- Country of Publication:
- United States
- Language:
- English
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