Crystal structure of non-myristoylated E153A recoverin at 1.2 A resolution with calcium ions bound to EF-hands 2 and 3

Experimental Data Snapshot

  • Resolution: 1.20 Å
  • R-Value Free: 0.140 
  • R-Value Work: 0.121 
  • R-Value Observed: 0.122 

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Crystal Structure of Recoverin with Calcium Ions Bound to Both Functional EF Hands.

Kumar, R.P.Ranaghan, M.J.Ganjei, A.Y.Oprian, D.D.

(2015) Biochemistry 54: 7222-7228

  • DOI: https://doi.org/10.1021/acs.biochem.5b01160
  • Primary Citation of Related Structures:  
    4YI8, 4YI9

  • PubMed Abstract: 

    Recoverin (Rv), a small Ca(2+)-binding protein that inhibits rhodopsin kinase (RK), has four EF hands, two of which are functional (EF2 and EF3). Activation requires Ca(2+) in both EF hands, but crystal structures have never been observed with Ca(2+) ions in both sites; all previous structures have Ca(2+) bound to only EF3. We suspected that this was due to an intermolecular crystal contact between T80 and a surface glutamate (E153) that precluded coordination of a Ca(2+) ion in EF2. We constructed the E153A mutant, determined its X-ray crystal structure to 1.2 Å resolution, and showed that two Ca(2+) ions are bound, one in EF3 and one in EF2. Additionally, several other residues are shown to adopt conformations in the 2Ca(2+) structure not seen previously and not seen in a second structure of the E153A mutant containing Na(+) instead of Ca(2+) in the EF2 site. The side-chain rearrangements in these residues form a 28 Å allosteric cascade along the surface of the protein connecting the Ca(2+)-binding site of EF2 with the active-site pocket responsible for binding RK.

  • Organizational Affiliation

    Department of Biochemistry, Brandeis University , Waltham, Massachusetts 02454, United States.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Recoverin201Bos taurusMutation(s): 1 
Gene Names: RCVRNRCV1
Find proteins for P21457 (Bos taurus)
Explore P21457 
Go to UniProtKB:  P21457
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP21457
Sequence Annotations
  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Resolution: 1.20 Å
  • R-Value Free: 0.140 
  • R-Value Work: 0.121 
  • R-Value Observed: 0.122 
  • Space Group: I 4
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 84.16α = 90
b = 84.16β = 90
c = 59.23γ = 90
Software Package:
Software NamePurpose
MOSFLMdata reduction
SCALAdata scaling
PDB_EXTRACTdata extraction

Structure Validation

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Entry History & Funding Information

Deposition Data

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: 2015-12-02
    Type: Initial release
  • Version 1.1: 2015-12-30
    Changes: Database references
  • Version 1.2: 2017-09-20
    Changes: Author supporting evidence, Database references, Derived calculations
  • Version 1.3: 2019-12-25
    Changes: Author supporting evidence
  • Version 1.4: 2023-09-27
    Changes: Data collection, Database references, Refinement description