1YZU

GppNHp-Bound Rab21 GTPase at 2.50 A Resolution


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.217 

Starting Model: experimental
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Ligand Structure Quality Assessment 


This is version 1.4 of the entry. See complete history


Literature

Structural basis of family-wide Rab GTPase recognition by rabenosyn-5.

Eathiraj, S.Pan, X.Ritacco, C.Lambright, D.G.

(2005) Nature 436: 415-419

  • DOI: https://doi.org/10.1038/nature03798
  • Primary Citation of Related Structures:  
    1YU9, 1YVD, 1YZK, 1YZL, 1YZM, 1YZN, 1YZQ, 1YZT, 1YZU, 1Z06, 1Z07, 1Z08, 1Z0A, 1Z0D, 1Z0F, 1Z0I, 1Z0J, 1Z0K, 1Z22, 1Z2A

  • PubMed Abstract: 

    Rab GTPases regulate all stages of membrane trafficking, including vesicle budding, cargo sorting, transport, tethering and fusion. In the inactive (GDP-bound) conformation, accessory factors facilitate the targeting of Rab GTPases to intracellular compartments. After nucleotide exchange to the active (GTP-bound) conformation, Rab GTPases interact with functionally diverse effectors including lipid kinases, motor proteins and tethering complexes. How effectors distinguish between homologous Rab GTPases represents an unresolved problem with respect to the specificity of vesicular trafficking. Using a structural proteomic approach, we have determined the specificity and structural basis underlying the interaction of the multivalent effector rabenosyn-5 with the Rab family. The results demonstrate that even the structurally similar effector domains in rabenosyn-5 can achieve highly selective recognition of distinct subsets of Rab GTPases exclusively through interactions with the switch and interswitch regions. The observed specificity is determined at a family-wide level by structural diversity in the active conformation, which governs the spatial disposition of critical conserved recognition determinants, and by a small number of both positive and negative sequence determinants that allow further discrimination between Rab GTPases with similar switch conformations.


  • Organizational Affiliation

    Program in Molecular Medicine, Department of Biochemistry & Molecular Pharmacology, University of Massachusetts Medical School, Worcester, Massachusetts 01605, USA.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Ras-related protein Rab-21
A, B
170Homo sapiensMutation(s): 0 
Gene Names: RAB21KIAA0118
UniProt & NIH Common Fund Data Resources
Find proteins for Q9UL25 (Homo sapiens)
Explore Q9UL25 
Go to UniProtKB:  Q9UL25
PHAROS:  Q9UL25
GTEx:  ENSG00000080371 
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ9UL25
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.293 
  • R-Value Work: 0.214 
  • R-Value Observed: 0.217 
  • Space Group: I 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 77.834α = 90
b = 99.719β = 90
c = 105.76γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
DENZOdata reduction
SCALEPACKdata scaling
AMoREphasing

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2005-07-26
    Type: Initial release
  • Version 1.1: 2008-04-30
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2024-02-14
    Changes: Data collection, Database references, Derived calculations
  • Version 1.4: 2024-04-03
    Changes: Refinement description