4MQV

Crystal complex of Rpa32c and Smarcal1 N-terminus


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.192 

wwPDB Validation 3D Report Full Report


This is version 1.1 of the entry. See complete history

Literature

Structure of RPA32 bound to the N-terminus of SMARCAL1 redefines the binding interface between RPA32 and its interacting proteins

Xie, S.Lu, Y.Jakoncic, J.Sun, H.Xia, J.Qian, C.M.

(2014) Febs J. 281: 3382-3396

  • DOI: 10.1111/febs.12867

  • PubMed Abstract: 
  • Replication protein A subunit RPA32 contains a C-terminal domain that interacts with a variety of DNA damage response proteins including SMARCAL1, Tipin, UNG2 and XPA. We have solved the high-resolution crystal structure of RPA32 C-terminal domain (R ...

    Replication protein A subunit RPA32 contains a C-terminal domain that interacts with a variety of DNA damage response proteins including SMARCAL1, Tipin, UNG2 and XPA. We have solved the high-resolution crystal structure of RPA32 C-terminal domain (RPA32C) in complex with a 26-amino-acid peptide derived from the N-terminus of SMARCAL1 (SMARCAL1N). The RPA32C-SMARCAL1N structure reveals a 1 : 1 binding stoichiometry and displays a well-ordered binding interface. SMARCAL1N adopts a long α-helical conformation with the highly conserved 11 residues aligned on one face of the α-helix showing extensive interactions with the RPA32C domain. Extensive mutagenesis experiments were performed to corroborate the interactions observed in crystal structure. Moreover, the α1/α2 loop of the RPA32C domain undergoes a conformational rearrangement upon SMARCAL1N binding. NMR study has further confirmed that the RPA32C-SMARCAL1N interaction induces conformational changes in RPA32C. Isothermal titration calorimetry studies have also demonstrated that the conserved α-helical motif defined in the current study is required for sufficient binding of RPA32C. Taken together, our study has provided convincing structural information that redefines the common recognition pattern shared by RPA32C interacting proteins.


    Organizational Affiliation

    Department of Biochemistry, the University of Hong Kong, China.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Replication protein A 32 kDa subunit
A, C
69Homo sapiensMutation(s): 0 
Gene Names: RPA2 (REPA2, RPA32, RPA34)
Find proteins for P15927 (Homo sapiens)
Go to Gene View: RPA2
Go to UniProtKB:  P15927
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
SWI/SNF-related matrix-associated actin-dependent regulator of chromatin subfamily A-like protein 1
B, D
26Homo sapiensMutation(s): 0 
Gene Names: SMARCAL1 (HARP)
EC: 3.6.4.-
Find proteins for Q9NZC9 (Homo sapiens)
Go to Gene View: SMARCAL1
Go to UniProtKB:  Q9NZC9
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.192 
  • Space Group: P 6 2 2
Unit Cell:
Length (Å)Angle (°)
a = 149.089α = 90.00
b = 149.089β = 90.00
c = 46.055γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data reduction
ADSCdata collection
REFMACrefinement
HKL-2000data scaling
MOLREPphasing

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

  • Deposited Date: 2013-09-16 
  • Released Date: 2014-07-02 
  • Deposition Author(s): Xie, S., Qian, C.M.

Revision History 

  • Version 1.0: 2014-07-02
    Type: Initial release
  • Version 1.1: 2014-12-31
    Type: Database references