9OZW | pdb_00009ozw

Gradient equilibration of alpha-lactalbumin to a 25% glycerol solution over 40 minutes

  • Classification: STRUCTURAL PROTEIN
  • Organism(s): Bos taurus
  • Mutation(s): No 

  • Deposited: 2025-06-05 Released: 2025-10-15 
  • Deposition Author(s): Juers, D.H.
  • Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.17 Å
  • R-Value Free: 
    0.237 (Depositor), 0.240 (DCC) 
  • R-Value Work: 
    0.197 (Depositor), 0.199 (DCC) 
  • R-Value Observed: 
    0.199 (Depositor) 

Starting Model: experimental
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Literature

Automated gradient equilibration of macromolecular crystals to new solution conditions.

Juers, D.H., Quire, J., Stothers, S.

(2025) Acta Crystallogr F Struct Biol Commun 81: 478-486

  • DOI: https://doi.org/10.1107/S2053230X25008398
  • Primary Citation of Related Structures:  
    9OZ5, 9OZW, 9OZY

  • PubMed Abstract: 

    We describe a device and a method for changing the ambient solution of a macromolecular crystal. The approach is gentle, automated, inexpensive and open source. Examples are given of the equilibration of three different crystals to new solutions with exchange times ranging from 5 to 180 min. In each case direct transfer of the crystal to the new solution causes cracking, which is eliminated with gradient equilibration using the described device. Crystals equilibrated with the device produce high-quality diffraction that yields refined structures comparable to those determined previously. The device offers a more systematic and labor-saving workflow than current practice both for performing diffraction analysis of macromolecular crystals and for investigating the response of macromolecular crystals to changes in solution composition.

    • Organizational Affiliation: 
    • Department of Physics, Whitman College, Walla Walla, WA 99362, USA.

Macromolecules
Find similar proteins by: 
(by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Alpha-lactalbumin
A, B, C, D, E
A, B, C, D, E, F
123Bos taurusMutation(s): 0 
UniProt
Find proteins for P00711 (Bos taurus)
Explore P00711 
Go to UniProtKB:  P00711
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00711
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.17 Å
  • R-Value Free:  0.237 (Depositor), 0.240 (DCC) 
  • R-Value Work:  0.197 (Depositor), 0.199 (DCC) 
  • R-Value Observed: 0.199 (Depositor) 
Space Group: P 21 21 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 72.296α = 90
b = 105.084β = 90
c = 118.19γ = 90
Software Package:
Software NamePurpose
PHENIXrefinement
CrysalisProdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Entry History & Funding Information

Deposition Data

  • Released Date: 2025-10-15 
    • Deposition Author(s): Juers, D.H.
Funding OrganizationLocationGrant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)United States--

Revision History  (Full details and data files)

  • Version 1.0: 2025-10-15
    Type: Initial release
  • Version 1.1: 2025-11-12
    Changes: Database references