Results 41 to 50 of about 36,815 (253)

Following replicative DNA synthesis by time-resolved X-ray crystallography

open access: yesNature Communications, 2021
DNA polymerases are the key enzymes responsible for DNA replication and repair. Here the authors reveal through time-lapsed images of X-ray crystal structures that translocation precedes phosphodiester bond formation in the mechanism of DNA synthesis.
Nicholas Chim   +4 more
doaj   +1 more source

Time-resolved serial femtosecond crystallography reveals early structural changes in channelrhodopsin

open access: yeseLife, 2021
Channelrhodopsins (ChRs) are microbial light-gated ion channels utilized in optogenetics to control neural activity with light . Light absorption causes retinal chromophore isomerization and subsequent protein conformational changes visualized as ...
Kazumasa Oda   +47 more
doaj   +1 more source

Time-Resolved Macromolecular Crystallography [PDF]

open access: yesPhysics Today, 2001
Rapid x-ray characterization of structure and innovative ways of initiating and controlling reactions are shedding new light on protein function by enabling the visualization of macromolecules in action.
Eric A. Galburt, Barry L. Stoddard
openaire   +1 more source

Approach of Serial Crystallography II

open access: yesCrystals, 2021
Serial crystallography (SX) is an emerging X-ray crystallographic method for determining macromolecule structures. It can address concerns regarding the limitations of data collected by conventional crystallography techniques, which require cryogenic ...
Ki-Hyun Nam
doaj   +1 more source

Time-Resolved Macromolecular Crystallography [PDF]

open access: yesAnnual Review of Biophysics and Biophysical Chemistry, 1989
Reaction mechanisms in chemistry and biochemistry involve structural change, not merely static structure (1). These structural changes can be very rapid, spanning the time range from femtoseconds to seconds and above. We have developed and applied timeresolved X-ray crystallography(2,3) to monitor directly the changes in electron density and hence in ...
openaire   +2 more sources

Sample Preparation for Time-Resolved Serial Crystallography: Practical Considerations

open access: yes, 2023
Time-resolved serial crystallography is an emerging method to elucidate the structure-function relationship of biomolecular systems at up to atomic resolution.
Mehrabi, P., Schulz, E.
core   +1 more source

Ring closing reaction in diarylethene captured by femtosecond electron crystallography [PDF]

open access: yes, 2013
The photoinduced ring closing reaction in diarylethene, which serves as a modelsystem for understanding reactive crossings through conical intersections, was directly observed with atomic resolution using femtosecond electron diffraction.
Liu, Lai Chung   +15 more
core   +1 more source

Structural characterization of electron transfer in D.m (6-4) photolyase by time-resolved X-ray crystallography [PDF]

open access: yes, 2022
Photolyases are flavoproteins widely spread in bacteria, archea, fungi, plants and animals. These enzymes absorb blue light and use it as an energy source for repairing damages that are induced on DNA after a prolonged exposure to UV-light. The mechanism
Cellini, Andrea
core   +1 more source

Time Resolved Diffraction Studies of Structural Changes in Sensory Rhodopsin [PDF]

open access: yes, 2019
Responding to different light conditions is an essential process for many organisms on earth. Unicellular organisms are no exception to this and mechanisms for controlling cellular movement must often be sensitive to light.
Bosman, Robert
core   +1 more source

High-throughput high-resolution cryo-electron crystallography [PDF]

open access: yes, 2015
High-resolution structures of membrane and soluble proteins can be obtained by cryo-electron crystallography, given highly-ordered cryo-preparations of perfectly flat 2D crystals are available.
Scherer, Sebastian
core   +1 more source

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