Exploring knotting mechanisms in protein folding
نویسندگان
چکیده
منابع مشابه
Exploring the mechanisms of protein folding
Neither of the two prevalent theories, namely thermodynamic stability and kinetic stability, provides a comprehensive understanding of protein folding. The thermodynamic theory is misleading because it assumes that free energy is the exclusive dominant mechanism of protein folding, and attributes the structural transition from one characteristic state to another to energy barriers. Conversely, ...
متن کاملProtein knotting through concatenation significantly reduces folding stability
Concatenation by covalent linkage of two protomers of an intertwined all-helical HP0242 homodimer from Helicobacter pylori results in the first example of an engineered knotted protein. While concatenation does not affect the native structure according to X-ray crystallography, the folding kinetics is substantially slower compared to the parent homodimer. Using NMR hydrogen-deuterium exchange a...
متن کاملPolymer Uncrossing and Knotting in Protein Folding, and Their Role in Minimal Folding Pathways
We introduce a method for calculating the extent to which chain non-crossing is important in the most efficient, optimal trajectories or pathways for a protein to fold. This involves recording all unphysical crossing events of a ghost chain, and calculating the minimal uncrossing cost that would have been required to avoid such events. A depth-first tree search algorithm is applied to find mini...
متن کاملProtein folding mechanisms
Introduction One of the greatest challenges in modern structural biology is to understand how a newly formed polypeptide sequence finds its correct and unique fold. Real progress has been made towards establishing a fundamental and universal mechanism by which protein folding takes place, and such advances have come from the combination of experimental and theoretical techniques. In our laborat...
متن کاملGlycoprotein folding and quality-control mechanisms in protein-folding diseases
Biosynthesis of proteins--from translation to folding to export--encompasses a complex set of events that are exquisitely regulated and scrutinized to ensure the functional quality of the end products. Cells have evolved to capitalize on multiple post-translational modifications in addition to primary structure to indicate the folding status of nascent polypeptides to the chaperones and other p...
متن کاملذخیره در منابع من
با ذخیره ی این منبع در منابع من، دسترسی به آن را برای استفاده های بعدی آسان تر کنید
ژورنال
عنوان ژورنال: Proceedings of the National Academy of Sciences
سال: 2008
ISSN: 0027-8424,1091-6490
DOI: 10.1073/pnas.0806697105