6OR0

Crystal structure of Insulin from Non-merohedrally twinned crystals


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.166 

wwPDB Validation 3D Report Full Report


This is version 1.0 of the entry. See complete history

Literature

Non-merohedral twinning: from minerals to proteins.

Sevvana, M.Ruf, M.Uson, I.Sheldrick, G.M.Herbst-Irmer, R.

(2019) Acta Crystallogr D Struct Biol 75: 1040-1050

  • DOI: 10.1107/S2059798319010179
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 
  • In contrast to twinning by merohedry, the reciprocal lattices of the different domains of non-merohedral twins do not overlap exactly. This leads to three kinds of reflections: reflections with no overlap, reflections with an exact overlap and reflec ...

    In contrast to twinning by merohedry, the reciprocal lattices of the different domains of non-merohedral twins do not overlap exactly. This leads to three kinds of reflections: reflections with no overlap, reflections with an exact overlap and reflections with a partial overlap of a reflection from a second domain. This complicates the unit-cell determination, indexing, data integration and scaling of X-ray diffraction data. However, with hindsight it is possible to detwin the data because there are reflections that are not affected by the twinning. In this article, the successful solution and refinement of one mineral, one organometallic and two protein non-merohedral twins using a common strategy are described. The unit-cell constants and the orientation matrices were determined by the program CELL_NOW. The data were then integrated with SAINT. TWINABS was used for scaling, empirical absorption corrections and the generation of two different data files, one with detwinned data for structure solution and refinement and a second one for (usually more accurate) structure refinement against total integrated intensities. The structures were solved by experimental phasing using SHELXT for the first two structures and SHELXC/D/E for the two protein structures; all models were refined with SHELXL.


    Organizational Affiliation

    Structural Biology, IBMB-CSIC, Baldiri Reixach 13-15, 08028 Barcelona, Spain.,Department of Biological Sciences, Purdue University, West Lafayette, IN 47907, USA.,Department of Inorganic Chemistry, University of Göttingen, Tammannstrasse 4, 37077 Göttingen, Germany.,Bruker Nano Inc., 5465 East Cheryl Parkway, Madison, WI 53711, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Insulin chain A
A
21Bos taurusMutation(s): 0 
Gene Names: INS
Find proteins for P01317 (Bos taurus)
Go to Gene View: INS
Go to UniProtKB:  P01317
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Insulin chain B
B
29Bos taurusMutation(s): 0 
Gene Names: INS
Find proteins for P01317 (Bos taurus)
Go to Gene View: INS
Go to UniProtKB:  P01317
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.55 Å
  • R-Value Free: 0.215 
  • R-Value Work: 0.166 
  • Space Group: I 21 3
Unit Cell:
Length (Å)Angle (°)
a = 78.031α = 90.00
b = 78.031β = 90.00
c = 78.031γ = 90.00
Software Package:
Software NamePurpose
SHELXrefinement
SHELXDEphasing
SADABSdata scaling
SAINTdata reduction

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Spanish Ministry of Science, Innovation, and UniversitiesSpainBIO2015-64216-P
European Union (EU)European UnionMDM2014-0435

Revision History 

  • Version 1.0: 2019-12-11
    Type: Initial release