6PU5

MicroED structure of proteinase K recorded on CetaD


Experimental Data Snapshot

  • Method: ELECTRON CRYSTALLOGRAPHY
  • Resolution: 2.7 Å
  • Aggregation State: 3D ARRAY 
  • Reconstruction Method: CRYSTALLOGRAPHY 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

MicroED with the Falcon III direct electron detector.

Hattne, J.Martynowycz, M.W.Penczek, P.A.Gonen, T.

(2019) Iucrj 6: 921-926

  • DOI: 10.1107/S2052252519010583
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • Microcrystal electron diffraction (MicroED) combines crystallography and electron cryo-microscopy (cryo-EM) into a method that is applicable to high-resolution structure determination. In MicroED, nanosized crystals, which are often intractable using ...

    Microcrystal electron diffraction (MicroED) combines crystallography and electron cryo-microscopy (cryo-EM) into a method that is applicable to high-resolution structure determination. In MicroED, nanosized crystals, which are often intractable using other techniques, are probed by high-energy electrons in a transmission electron microscope. Diffraction data are recorded by a camera in movie mode: the nanocrystal is continuously rotated in the beam, thus creating a sequence of frames that constitute a movie with respect to the rotation angle. Until now, diffraction-optimized cameras have mostly been used for MicroED. Here, the use of a direct electron detector that was designed for imaging is reported. It is demonstrated that data can be collected more rapidly using the Falcon III for MicroED and with markedly lower exposure than has previously been reported. The Falcon III was operated at 40 frames per second and complete data sets reaching atomic resolution were recorded in minutes. The resulting density maps to 2.1 Å resolution of the serine protease proteinase K showed no visible signs of radiation damage. It is thus demonstrated that dedicated diffraction-optimized detectors are not required for MicroED, as shown by the fact that the very same cameras that are used for imaging applications in electron microscopy, such as single-particle cryo-EM, can also be used effectively for diffraction measurements.


    Organizational Affiliation

    Howard Hughes Medical Institute, Department of Biological Chemistry, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, USA.,Howard Hughes Medical Institute, Department of Physiology, David Geffen School of Medicine, University of California, Los Angeles, CA 90095, USA.,Department of Biochemistry and Molecular Biology, The University of Texas McGovern Medical School, Houston, TX 77030, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Proteinase K
A
279Parengyodontium albumMutation(s): 0 
Gene Names: PROK
EC: 3.4.21.64
Find proteins for P06873 (Parengyodontium album)
Go to UniProtKB:  P06873
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CA
Query on CA

Download SDF File 
Download CCD File 
A
CALCIUM ION
Ca
BHPQYMZQTOCNFJ-UHFFFAOYSA-N
 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON CRYSTALLOGRAPHY
  • Resolution: 2.7 Å
  • Aggregation State: 3D ARRAY 
  • Reconstruction Method: CRYSTALLOGRAPHY 
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
MOLREPphasing
Aimlessdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2019-08-28
    Type: Initial release
  • Version 1.1: 2019-10-16
    Type: Data collection, Database references