4D0G

Structure of Rab14 in complex with Rab-Coupling Protein (RCP)

Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.231 

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Literature

Structure-Function Analyses of the Interactions between Rab11 and Rab14 Small Gtpases with Their Shared Effector Rab Coupling Protein (Rcp).

Lall, P., Lindsay, A.J., Hanscom, S., Kecman, T., Taglauer, E.S., Mcveigh, U.M., Franklin, E., Mccaffrey, M.W., Khan, A.R.

(2015) J Biol Chem 290: 18817

  • DOI: 10.1074/jbc.M114.612366
  • Primary Citation of Related Structures:  
    4D0G

  • PubMed Abstract: 

    • Rab GTPases recruit effector proteins, via their GTP-dependent switch regions, to distinct subcellular compartments. Rab11 and Rab25 are closely related small GTPases that bind to common effectors termed the Rab11 family of interacting proteins (FIPs). The FIPs are organized into two subclasses (class I and class II) based on sequence and domain organization, and both subclasses contain a highly conserved Rab-binding domain at their C termini ...

    Rab GTPases recruit effector proteins, via their GTP-dependent switch regions, to distinct subcellular compartments. Rab11 and Rab25 are closely related small GTPases that bind to common effectors termed the Rab11 family of interacting proteins (FIPs). The FIPs are organized into two subclasses (class I and class II) based on sequence and domain organization, and both subclasses contain a highly conserved Rab-binding domain at their C termini. Yeast two-hybrid and biochemical studies have revealed that the more distantly related Rab14 also interacts with class I FIPs. Here, we perform detailed structural, thermodynamic, and cellular analyses of the interactions between Rab14 and one of the class I FIPs, the Rab-coupling protein (RCP), to clarify the molecular aspects of the interaction. We find that Rab14 indeed binds to RCP, albeit with reduced affinity relative to conventional Rab11-FIP and Rab25-FIP complexes. However, in vivo, Rab11 recruits RCP onto biological membranes. Furthermore, biophysical analyses reveal a noncanonical 1:2 stoichiometry between Rab14-RCP in dilute solutions, in contrast to Rab11/25 complexes. The structure of Rab14-RCP reveals that Rab14 interacts with the canonical Rab-binding domain and also provides insight into the unusual properties of the complex. Finally, we show that both the Rab coupling protein and Rab14 function in neuritogenesis.

    Organizational Affiliation: 

    From the School of Biochemistry and Immunology, Trinity College, Dublin 2 and amirrafk@tcd.ie.



Macromolecules
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
RAS-RELATED PROTEIN RAB-14A175Homo sapiensMutation(s): 1 
Gene Names: RAB14
UniProt & NIH Common Fund Data Resources
Find proteins for P61106 (Homo sapiens)
Explore P61106 
Go to UniProtKB:  P61106
PHAROS:  P61106
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP61106
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
RAB11 FAMILY-INTERACTING PROTEIN 1B [auth C]69Homo sapiensMutation(s): 0 
Gene Names: RAB11FIP1, RCP
UniProt & NIH Common Fund Data Resources
Find proteins for Q6WKZ4 (Homo sapiens)
Explore Q6WKZ4 
Go to UniProtKB:  Q6WKZ4
PHAROS:  Q6WKZ4
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ6WKZ4
Protein Feature View
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
GTP
Query on GTP
Download Ideal Coordinates CCD File 
C [auth A]GUANOSINE-5'-TRIPHOSPHATE
C10 H16 N5 O14 P3
XKMLYUALXHKNFT-UUOKFMHZSA-N		 Ligand Interaction
MG
Query on MG
Download Ideal Coordinates CCD File 
D [auth A]MAGNESIUM ION
Mg
JLVVSXFLKOJNIY-UHFFFAOYSA-N		 Ligand Interaction
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.50 Å
  • R-Value Free: 0.294 
  • R-Value Work: 0.224 
  • R-Value Observed: 0.231 
  • Space Group: C 2 2 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 95.87α = 90
b = 148.228β = 90
c = 38.808γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
HKL-2000data reduction
SCALEPACKdata scaling
MOLREPphasing

Structure Validation

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Entry History 

Deposition Data

  • Deposited Date: 2014-04-25 
  • Released Date: 2015-05-20 
    • Deposition Author(s): Lall, P., Khan, A.R.

Revision History  (Full details and data files)

  • Version 1.0: 2015-05-20
    Type: Initial release
  • Version 1.1: 2015-06-10
    Changes: Database references
  • Version 1.2: 2015-06-17
    Changes: Database references
  • Version 1.3: 2015-08-05
    Changes: Database references