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research article

Exploring the Molecular Conformation Space by Soft Molecule- Surface Collision

Anggara, Kelvin
•
Zhu, Yuntao
•
Delbianco, Martina
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December 23, 2020
Journal Of The American Chemical Society

Biomolecules function by adopting multiple conformations. Such dynamics are governed by the conformation landscape whose study requires characterization of the ground and excited conformation states. Here, the conformational landscape of a molecule is sampled by exciting an initial gas-phase molecular conformer into diverse conformation states, using soft molecule-surface collision (0.5-5.0 eV). The resulting ground and excited molecular conformations, adsorbed on the surface, are imaged at the single-molecule level. This technique permits the exploration of oligosaccharide conformations, until now, limited by the high flexibility of oligosaccharides and ensemble-averaged analytical methods. As a model for cellulose, cellohexaose chains are observed in two conformational extremes, the typical "extended" chain and the atypical "coiled" chain-the latter identified as the gas-phase conformer preserved on the surface. Observing conformations between these two extremes reveals the physical properties of cellohexaose, behaving as a rigid ribbon that becomes flexible when twisted. The conformation space of any molecule that can be electrosprayed can now be explored.

  • Details
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Type
research article
DOI
10.1021/jacs.0c09933
Web of Science ID

WOS:000603395100023

Author(s)
Anggara, Kelvin
Zhu, Yuntao
Delbianco, Martina
Rauschenbach, Stephan
Abb, Sabine
Seeberger, Peter H.
Kern, Klaus  
Date Issued

2020-12-23

Publisher

AMER CHEMICAL SOC

Published in
Journal Of The American Chemical Society
Volume

142

Issue

51

Start page

21420

End page

21427

Subjects

Chemistry, Multidisciplinary

•

Chemistry

•

x-ray

•

amorphous cellulose

•

normal-modes

•

dynamics

•

protein

•

spectroscopy

•

cellobiose

•

crystal

•

nmr

Editorial or Peer reviewed

REVIEWED

Written at

EPFL

EPFL units
LSEN  
Available on Infoscience
March 26, 2021
Use this identifier to reference this record
https://infoscience.epfl.ch/handle/20.500.14299/176690
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