Maltose Binding Protein fusion with RACK1 from A. thaliana

Experimental Data Snapshot

  • Resolution: 2.40 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.210 

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This is version 2.2 of the entry. See complete history


Structure of a signal transduction regulator, RACK1, from Arabidopsis thaliana.

Ullah, H.Scappini, E.L.Moon, A.F.Williams, L.V.Armstrong, D.L.Pedersen, L.C.

(2008) Protein Sci 17: 1771-1780

  • DOI: https://doi.org/10.1110/ps.035121.108
  • Primary Citation of Related Structures:  

  • PubMed Abstract: 

    The receptor for activated C-kinase 1 (RACK1) is a highly conserved WD40 repeat scaffold protein found in a wide range of eukaryotic species from Chlamydymonas to plants and humans. In tissues of higher mammals, RACK1 is ubiquitously expressed and has been implicated in diverse signaling pathways involving neuropathology, cellular stress, protein translation, and developmental processes. RACK1 has established itself as a scaffold protein through physical interaction with a myriad of signaling proteins ranging from kinases, phosphatases, ion channels, membrane receptors, G proteins, IP3 receptor, and with widely conserved structural proteins associated with the ribosome. In the plant Arabidopsis thaliana, RACK1A is implicated in diverse developmental and environmental stress pathways. Despite the functional conservation of RACK1-mediated protein-protein interaction-regulated signaling modes, the structural basis of such interactions is largely unknown. Here we present the first crystal structure of a RACK1 protein, RACK1 isoform A from Arabidopsis thaliana, at 2.4 A resolution, as a C-terminal fusion of the maltose binding protein. The structure implicates highly conserved surface residues that could play critical roles in protein-protein interactions and reveals the surface location of proposed post-transcriptionally modified residues. The availability of this structure provides a structural basis for dissecting RACK1-mediated cellular signaling mechanisms in both plants and animals.

  • Organizational Affiliation

    Department of Biology, Howard University, Washington, DC 20059, USA.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Maltose-binding periplasmic protein fused with RACK1694Escherichia coli K-12Arabidopsis thaliana
This entity is chimeric
Mutation(s): 4 
Gene Names: malEb4034JW3994ARCAAt1g18080T10F20.9T10O22.6
Find proteins for O24456 (Arabidopsis thaliana)
Explore O24456 
Go to UniProtKB:  O24456
Find proteins for P0AEX9 (Escherichia coli (strain K12))
Explore P0AEX9 
Go to UniProtKB:  P0AEX9
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupsO24456P0AEX9
Sequence Annotations
  • Reference Sequence


Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
Glycosylation Resources
GlyTouCan:  G07411ON
GlyCosmos:  G07411ON
Small Molecules
Ligands 1 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
Query on EDO

Download Ideal Coordinates CCD File 
C [auth A]1,2-ETHANEDIOL
C2 H6 O2
Biologically Interesting Molecules (External Reference) 1 Unique
Experimental Data & Validation

Experimental Data

  • Resolution: 2.40 Å
  • R-Value Free: 0.250 
  • R-Value Work: 0.210 
  • R-Value Observed: 0.210 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 57.777α = 70.4
b = 63.263β = 88.38
c = 70.056γ = 73.82
Software Package:
Software NamePurpose
StructureStudiodata collection
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2008-09-09
    Type: Initial release
  • Version 1.1: 2011-07-13
    Changes: Version format compliance
  • Version 1.2: 2015-08-26
    Changes: Source and taxonomy
  • Version 1.3: 2017-07-26
    Changes: Source and taxonomy
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Structure summary
  • Version 2.1: 2021-10-20
    Changes: Database references, Structure summary
  • Version 2.2: 2023-08-30
    Changes: Data collection, Refinement description