Ultrafast Dynamics of Water-Protein Coupled Motions Around the Surface of Eye Crystallin.

Ultrafast Dynamics of Water-Protein Coupled Motions Around the Surface of Eye Crystallin.

Houston, Patrick;Macro, Nicolas;Kang, Minhee;Chen, Long;Yang, Jin;Wang, Lijuan;Wu, Zhengrong;Zhong, Dongping;
Journal of the American Chemical Society 2020
120
houston2020ultrafastjournal

Abstract

Water dynamics on the protein surface mediate both protein structure and function. However, many questions remain about the role of the protein hydration layers in protein fluctuations and how the dynamics of these layers relate to specific protein properties. The fish eye lens protein γM7-crystallin (γM7) is found in vivo at extremely high concentrations nearing the packing limit, corresponding to only a few water layers between adjacent proteins. In this study, we conducted a site-specific probing of hydration water motions and sidechain dynamics at nine selected sites around the surface of γM7 using a tryptophan scan with femtosecond spectroscopy and NMR nuclear spin relaxation (NSR). We observed correlated fluctuations between hydration water and protein sidechains on a few and hundreds of picoseconds, corresponding to local reorientations and network restructuring, respectively. These motions are heterogenous over the protein surface and relate to the various steric and chemical properties of the local protein environment. Overall, we found that γM7 has relatively slower water dynamics within the hydration shell than a similar β-sheet protein, which may contribute to the high packing limit of this unique protein.

Citation

ID: 87341
Ref Key: houston2020ultrafastjournal
Use this key to autocite in SciMatic or Thesis Manager

References

Blockchain Verification

Account:
NFT Contract Address:
0x95644003c57E6F55A65596E3D9Eac6813e3566dA
Article ID:
87341
Unique Identifier:
10.1021/jacs.9b13506
Network:
Scimatic Chain (ID: 481)
Loading...
Blockchain Readiness Checklist
Authors
Abstract
Journal Name
Year
Title
5/5
Creates 1,000,000 NFT tokens for this article
Token Features:
  • ERC-1155 Standard NFT
  • 1 Million Supply per Article
  • Transferable via MetaMask
  • Permanent Blockchain Record
Blockchain QR Code
Scan with Saymatik Web3.0 Wallet

Saymatik Web3.0 Wallet