Modulation of Amyloidogenic Protein Self-Assembly Using Tethered Small Molecules
摘要:
Protein-protein interactions (PPIs) are involved in many of life's essential biological functions yet are also an underlying cause of several human diseases, including amyloidosis. The modulation of PPIs presents opportunities to gain mechanistic insights into amyloid assembly, particularly through the use of methods which can trap specific intermediates for detailed study. Such information can also provide a starting point for drug discovery. Here, we demonstrate that covalently tethered small molecule fragments can be used to stabilize specific oligomers during amyloid fibril formation, facilitating the structural characterization of these assembly intermediates. We exemplify the power of covalent tethering using the naturally occurring truncated variant (ΔN6) of the human protein β2-microglobulin (β2m), which assembles into amyloid fibrils associated with dialysis-related amyloidosis. Using this approach, we have trapped tetramers formed by ΔN6 under conditions which would normally lead to fibril formation and found that the degree of tetramer stabilization depends on the site of the covalent tether and the nature of the protein-fragment interaction. The covalent protein-ligand linkage enabled structural characterization of these trapped, off-pathway oligomers using X-ray crystallography and NMR, providing insight into why tetramer stabilization inhibits amyloid assembly. Our findings highlight the power of "post-translational chemical modification" as a tool to study biological molecular mechanisms.
SUBSTITUTED HETEROARYL CARBOXYLIC ACID HYDRAZIDES OR SALTS THEREOF AND USE THEREOF TO INCREASE STRESS TOLERANCE IN PLANTS
申请人:Bayer CropScience Aktiengesellschaft
公开号:US20180206498A1
公开(公告)日:2018-07-26
The invention relates to substituted heteroaryl carboxylic acid hydrazides of general formula (I) or salts thereof, wherein the groups of formula (I) have the definitions stated in the description, for increasing the stress tolerance in plants with respect to abiotic stress, and also for strengthening plant growth and/or for increasing plant yield.
The present invention relates to 11,12 γ lactone ketolides of formula (I) wherein R, R
1
, R
2
, R
3
are as defined herein and pharmaceutically acceptable salts and solvates thereof, to process for their preparation and their use in therapy or prophylaxis of systemic or topical bacterial infections in a human or animal body.
Synthesis and SAR of a novel Kir6.2/SUR1 channel opener scaffold identified by HTS
作者:Cayden J. Dodd、Keagan S. Chronister、Upendra Rathnayake、Lauren C. Parr、Kangjun Li、Sichen Chang、Dehui Mi、Emily L. Days、Joshua A. Bauer、Hyekyung P. Cho、Olivier Boutaud、Jerod S. Denton、Craig W. Lindsley、Changho Han
DOI:10.1016/j.bmcl.2023.129256
日期:2023.3
MACROLIDE ANTIBIOTICS
申请人:GLAXO GROUP LIMITED
公开号:EP1363925B1
公开(公告)日:2006-11-15
SUBSTITUIERTE HETEROARYLCARBONSÄUREHYDRAZIDE ODER DEREN SALZE UND IHRE VERWENDUNG ZUR STEIGERUNG DER STRESSTOLERANZ IN PFLANZEN