6CLA

2.80 A MicroED structure of proteinase K at 6.0 e- / A^2


Experimental Data Snapshot

  • Method: ELECTRON CRYSTALLOGRAPHY
  • Resolution: 2.80 Å
  • R-Value Free: 0.326 
  • R-Value Work: 0.263 
  • R-Value Observed: 0.267 

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Literature

Analysis of Global and Site-Specific Radiation Damage in Cryo-EM.

Hattne, J.Shi, D.Glynn, C.Zee, C.T.Gallagher-Jones, M.Martynowycz, M.W.Rodriguez, J.A.Gonen, T.

(2018) Structure 26: 759-766.e4

  • DOI: 10.1016/j.str.2018.03.021
  • Primary Citation of Related Structures:  
    6CL8, 6CL7, 6CL9, 6CLP, 6CLO, 6CLR, 6CLQ, 6CLT, 6CLS, 6CLH, 6CLG, 6CLJ, 6CLI, 6CLL, 6CLK, 6CLN, 6CLM, 6CLB, 6CLA, 6CLD, 6CLC, 6CLF, 6CLE

  • PubMed Abstract: 
  • Micro-crystal electron diffraction (MicroED) combines the efficiency of electron scattering with diffraction to allow structure determination from nano-sized crystalline samples in cryoelectron microscopy (cryo-EM). It has been used to solve structures of a diverse set of biomolecules and materials, in some cases to sub-atomic resolution ...

    Micro-crystal electron diffraction (MicroED) combines the efficiency of electron scattering with diffraction to allow structure determination from nano-sized crystalline samples in cryoelectron microscopy (cryo-EM). It has been used to solve structures of a diverse set of biomolecules and materials, in some cases to sub-atomic resolution. However, little is known about the damaging effects of the electron beam on samples during such measurements. We assess global and site-specific damage from electron radiation on nanocrystals of proteinase K and of a prion hepta-peptide and find that the dynamics of electron-induced damage follow well-established trends observed in X-ray crystallography. Metal ions are perturbed, disulfide bonds are broken, and acidic side chains are decarboxylated while the diffracted intensities decay exponentially with increasing exposure. A better understanding of radiation damage in MicroED improves our assessment and processing of all types of cryo-EM data.


    Organizational Affiliation

    Howard Hughes Medical Institute, University of California, Los Angeles, Los Angeles CA 90095, USA; Janelia Research Campus, Howard Hughes Medical Institute, Ashburn, VA 20147, USA; Departments of Physiology and Biological Chemistry, David Geffen School of Medicine, University of California, Los Angeles, Los Angeles CA 90095, USA. Electronic address: tgonen@ucla.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Proteinase KA279Parengyodontium albumMutation(s): 0 
Gene Names: PROK
EC: 3.4.21.64
UniProt
Find proteins for P06873 (Parengyodontium album)
Explore P06873 
Go to UniProtKB:  P06873
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: ELECTRON CRYSTALLOGRAPHY
  • Resolution: 2.80 Å
  • R-Value Free: 0.326 
  • R-Value Work: 0.263 
  • R-Value Observed: 0.267 
  • Space Group: P 43 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 67.45α = 90
b = 67.45β = 90
c = 100.818γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
MOSFLMdata reduction
Aimlessdata scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2018-05-16
    Type: Initial release