6ETA

Crystal Structure of Human Gamma-D crystallin Mutant P23T+R36S at Room Temperature


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.233 
  • R-Value Observed: 0.234 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Temperature-Dependent Interactions Explain Normal and Inverted Solubility in a gamma D-Crystallin Mutant.

Khan, A.R.James, S.Quinn, M.K.Altan, I.Charbonneau, P.McManus, J.J.

(2019) Biophys J 117: 930-937

  • DOI: 10.1016/j.bpj.2019.07.019
  • Primary Citation of Related Structures:  
    6ETA, 6ETC

  • PubMed Abstract: 
  • Protein crystal production is a major bottleneck in the structural characterization of proteins. To advance beyond large-scale screening, rational strategies for protein crystallization are crucial. Understanding how chemical anisotropy (or patchiness) of the protein surface, due to the variety of amino-acid side chains in contact with solvent, contributes to protein-protein contact formation in the crystal lattice is a major obstacle to predicting and optimizing crystallization ...

    Protein crystal production is a major bottleneck in the structural characterization of proteins. To advance beyond large-scale screening, rational strategies for protein crystallization are crucial. Understanding how chemical anisotropy (or patchiness) of the protein surface, due to the variety of amino-acid side chains in contact with solvent, contributes to protein-protein contact formation in the crystal lattice is a major obstacle to predicting and optimizing crystallization. The relative scarcity of sophisticated theoretical models that include sufficient detail to link collective behavior, captured in protein phase diagrams, and molecular-level details, determined from high-resolution structural information, is a further barrier. Here, we present two crystal structures for the P23T + R36S mutant of γD-crystallin, each with opposite solubility behavior: one melts when heated, the other when cooled. When combined with the protein phase diagram and a tailored patchy particle model, we show that a single temperature-dependent interaction is sufficient to stabilize the inverted solubility crystal. This contact, at the P23T substitution site, relates to a genetic cataract and reveals at a molecular level the origin of the lowered and retrograde solubility of the protein. Our results show that the approach employed here may present a productive strategy for the rationalization of protein crystallization.


    Organizational Affiliation

    Department of Chemistry, Maynooth University, Maynooth, Ireland. Electronic address: jennifer.mcmanus@mu.ie.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Gamma-crystallin DA, B174Homo sapiensMutation(s): 2 
Gene Names: CRYGDCRYG4
UniProt & NIH Common Fund Data Resources
Find proteins for P07320 (Homo sapiens)
Explore P07320 
Go to UniProtKB:  P07320
PHAROS:  P07320
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.20 Å
  • R-Value Free: 0.265 
  • R-Value Work: 0.233 
  • R-Value Observed: 0.234 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 54.036α = 90
b = 82.103β = 90
c = 106.248γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data


Funding OrganizationLocationGrant Number
Science Foundation IrelandIrelandSFI 12/1A/1239

Revision History  (Full details and data files)

  • Version 1.0: 2018-11-07
    Type: Initial release
  • Version 1.1: 2019-11-27
    Changes: Database references