TY  - JOUR
AU  - Schwarten, M.
AU  - Stoldt, M.
AU  - Mohrlüder, J.
AU  - Willbold, D.
TI  - Solution structure of Atg8 reveals conformational polymorphism of the N-terminal domain
JO  - Biochemical and biophysical research communications
VL  - 395
SN  - 0006-291X
CY  - Orlando, Fla.
PB  - Academic Press
M1  - PreJuSER-9748
SP  - 426 - 431
PY  - 2010
N1  - We thank Sameer Singh for carefully reading the manuscript as well as Clara Gruning, Justin Lecher and Sven Schunke for helpful discussions. This study was supported by a fellowship of the International Helmholtz Research School of Biophysics and Soft Matter (IHRS BioSoft) to M. Schwarten and a research Grant from the Deutsche Forschungsgemeinschaft (DFG) to D. Willbold (Wi1472/5).
AB  - During autophagy a crescent shaped like membrane is formed, which engulfs the material that is to be degraded. This membrane grows further until its edges fuse to form the double membrane covered autophagosome. Atg8 is a protein, which is required for this initial step of autophagy. Therefore, a multistage conjugation process of newly synthesized Atg8 to phosphatidylethanolamine is of critical importance. Here we present the high resolution structure of unprocessed Atg8 determined by nuclear magnetic resonance spectroscopy. Its C-terminal subdomain shows a well-defined ubiquitin-like fold with slightly elevated mobility in the pico- to nanosecond timescale as determined by heteronuclear NOE data. In comparison to unprocessed Atg8, cleaved Atg8(G116) shows a decreased mobility behaviour. The N-terminal domain adopts different conformations within the micro- to millisecond timescale. The possible biological relevance of the differences in dynamic behaviours between both subdomains as well as between the cleaved and uncleaved forms is discussed.
KW  - Autophagy
KW  - Microtubule-Associated Proteins: chemistry
KW  - Nuclear Magnetic Resonance, Biomolecular
KW  - Protein Folding
KW  - Protein Structure, Tertiary
KW  - Saccharomyces cerevisiae: chemistry
KW  - Saccharomyces cerevisiae: physiology
KW  - Saccharomyces cerevisiae Proteins: chemistry
KW  - Ubiquitin: chemistry
KW  - ATG8 protein, S cerevisiae (NLM Chemicals)
KW  - Microtubule-Associated Proteins (NLM Chemicals)
KW  - Saccharomyces cerevisiae Proteins (NLM Chemicals)
KW  - Ubiquitin (NLM Chemicals)
KW  - J (WoSType)
LB  - PUB:(DE-HGF)16
C6  - pmid:20382112
UR  - <Go to ISI:>//WOS:000277801200026
DO  - DOI:10.1016/j.bbrc.2010.04.043
UR  - https://juser.fz-juelich.de/record/9748
ER  -