5EPP

Structural Insights into the Interaction of p97 N-terminus Domain and VBM Motif in Rhomboid Protease, RHBDL4


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.88 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.177 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structural insights into the interaction of p97 N-terminus domain and VBM in rhomboid protease, RHBDL4.

Lim, J.J.Lee, Y.Ly, T.T.Kang, J.Y.Lee, J.G.An, J.Y.Youn, H.S.Park, K.R.Kim, T.G.Yang, J.K.Jun, Y.Eom, S.H.

(2016) Biochem.J. 473: 2863-2880

  • DOI: 10.1042/BCJ20160237

  • PubMed Abstract: 
  • RHBDL4 is an active rhomboid that specifically recognizes and cleaves atypical, positively charged transmembrane endoplasmic reticulum-associated degradation (ERAD) substrates. Interaction of valosin-containing protein (p97/VCP) and RHBDL4 is crucial ...

    RHBDL4 is an active rhomboid that specifically recognizes and cleaves atypical, positively charged transmembrane endoplasmic reticulum-associated degradation (ERAD) substrates. Interaction of valosin-containing protein (p97/VCP) and RHBDL4 is crucial to retrotranslocate polyubiquitinated substrates for ERAD pathway. Here, we report the first complex structure of VCP-binding motif (VBM) with p97 N-terminal domain (p97N) at 1.88 Å resolution. Consistent with p97 adaptor proteins including p47-ubiquitin regulatory X (UBX), gp78-VCP-interacting motif (VIM), OTU1-UBX-like element, and FAF1-UBX, RHBDL4 VBM also binds at the interface between the two lobes of p97N. Notably, the RF residues in VBM are involved in the interaction with p97N, showing a similar interaction pattern with that of FPR signature motif in the UBX domain, although the directionality is opposite. Comparison of VBM interaction with VIM of gp78, another α-helical motif that interacts with p97N, revealed that the helix direction is inversed. Nevertheless, the conserved arginine residues in both motifs participate in the majority of the interface via extensive hydrogen bonds and ionic interactions with p97N. We identified novel VBM-binding mode to p97N that involves a combination of two types of p97-cofactor specificities observed in the UBX and VIM interactions. This highlights the induced fit model of p97N interdomain cleft upon cofactor binding to form stable p97-cofactor complexes. Our mutational and biochemical analyses in defining the specific interaction between VBM and p97N have elucidated the importance of the highly conserved VBM, applicable to other VBM-containing proteins. We also showed that RHBDL4, ubiquitins, and p97 co-operate for efficient substrate dislocation.


    Organizational Affiliation

    School of Life Science, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea Steitz Center for Structural Biology, Gwangju Institute of Science and Technology (GIST), 123 Cheomdangwagi-ro, Buk-gu, Gwangju 61005, Republic of Korea.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Transitional endoplasmic reticulum ATPase
A
184Homo sapiensMutation(s): 0 
Gene Names: VCP
EC: 3.6.4.6
Find proteins for P55072 (Homo sapiens)
Go to Gene View: VCP
Go to UniProtKB:  P55072
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Rhomboid-related protein 4
B
15Homo sapiensMutation(s): 0 
Gene Names: RHBDD1 (RHBDL4)
EC: 3.4.21.105
Find proteins for Q8TEB9 (Homo sapiens)
Go to Gene View: RHBDD1
Go to UniProtKB:  Q8TEB9
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.88 Å
  • R-Value Free: 0.209 
  • R-Value Work: 0.177 
  • Space Group: P 65
Unit Cell:
Length (Å)Angle (°)
a = 96.999α = 90.00
b = 96.999β = 90.00
c = 50.902γ = 120.00
Software Package:
Software NamePurpose
Cootmodel building
MOLREPphasing
PHENIXrefinement
HKL-2000data processing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2016-09-14
    Type: Initial release
  • Version 1.1: 2016-11-09
    Type: Database references, Structure summary