4ZCB

Human CRBPII mutant - Y60W dimer


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.182 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Domain-Swapped Dimers of Intracellular Lipid-Binding Proteins: Evidence for Ordered Folding Intermediates.

Assar, Z.Nossoni, Z.Wang, W.Santos, E.M.Kramer, K.McCornack, C.Vasileiou, C.Borhan, B.Geiger, J.H.

(2016) Structure 24: 1590-1598

  • DOI: 10.1016/j.str.2016.05.022
  • Primary Citation of Related Structures:  
  • Also Cited By: 5U6G

  • PubMed Abstract: 
  • Human Cellular Retinol Binding Protein II (hCRBPII), a member of the intracellular lipid-binding protein family, is a monomeric protein responsible for the intracellular transport of retinol and retinal. Herein we report that hCRBPII forms an extensi ...

    Human Cellular Retinol Binding Protein II (hCRBPII), a member of the intracellular lipid-binding protein family, is a monomeric protein responsible for the intracellular transport of retinol and retinal. Herein we report that hCRBPII forms an extensive domain-swapped dimer during bacterial expression. The domain-swapped region encompasses almost half of the protein. The dimer represents a novel structural architecture with the mouths of the two binding cavities facing each other, producing a new binding cavity that spans the length of the protein complex. Although wild-type hCRBPII forms the dimer, the propensity for dimerization can be substantially increased via mutation at Tyr60. The monomeric form of the wild-type protein represents the thermodynamically more stable species, making the domain-swapped dimer a kinetically trapped entity. Hypothetically, the wild-type protein has evolved to minimize dimerization of the folding intermediate through a critical hydrogen bond (Tyr60-Glu72) that disfavors the dimeric form.


    Related Citations: 
    • Structures of holo wild-type human cellular retinol-binding protein II (hCRBPII) bound to retinol and retinal.
      Nossoni, Z.,Assar, Z.,Yapici, I.,Nosrati, M.,Wang, W.,Berbasova, T.,Vasileiou, C.,Borhan, B.,Geiger, J.
      (2014) Acta Crystallogr.,Sect.D 70: 3226


    Organizational Affiliation

    Department of Chemistry, Michigan State University, East Lansing, MI 48824, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Retinol-binding protein 2
A, B
133Homo sapiensMutation(s): 1 
Gene Names: RBP2 (CRBP2)
Find proteins for P50120 (Homo sapiens)
Go to Gene View: RBP2
Go to UniProtKB:  P50120
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.7 Å
  • R-Value Free: 0.239 
  • R-Value Work: 0.182 
  • Space Group: P 21 21 2
Unit Cell:
Length (Å)Angle (°)
a = 62.620α = 90.00
b = 109.774β = 90.00
c = 36.322γ = 90.00
Software Package:
Software NamePurpose
HKL-2000data reduction
REFMACphasing
REFMACrefinement
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-04-20
    Type: Initial release
  • Version 1.1: 2017-09-06
    Type: Database references, Derived calculations