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 
  • R-Value Observed: 0.193 

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
  • Primary Citation of Related Structures:  
    4MQV

  • 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 (RPA32C) in complex with a 26-amino-acid peptide derived from the N-terminus of SMARCAL1 (SMARCAL1N) ...

    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
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Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Replication protein A 32 kDa subunitA, C69Homo sapiensMutation(s): 0 
Gene Names: RPA32, RPA2, REPA2, RPA34
UniProt & NIH Common Fund Data Resources
Find proteins for P15927 (Homo sapiens)
Explore P15927 
Go to UniProtKB:  P15927
PHAROS:  P15927
Entity Groups  
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UniProt GroupP15927
Protein Feature View
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  • Reference Sequence
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Entity ID: 2
MoleculeChainsSequence LengthOrganismDetailsImage
SWI/SNF-related matrix-associated actin-dependent regulator of chromatin subfamily A-like protein 1B, D26Homo sapiensMutation(s): 0 
Gene Names: SMARCAL1, HARP
EC: 3.6.4
UniProt & NIH Common Fund Data Resources
Find proteins for Q9NZC9 (Homo sapiens)
Explore Q9NZC9 
Go to UniProtKB:  Q9NZC9
PHAROS:  Q9NZC9
Entity Groups  
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UniProt GroupQ9NZC9
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.220 
  • R-Value Work: 0.192 
  • R-Value Observed: 0.193 
  • Space Group: P 6 2 2
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 149.089α = 90
b = 149.089β = 90
c = 46.055γ = 120
Software Package:
Software NamePurpose
ADSCdata collection
MOLREPphasing
REFMACrefinement
HKL-2000data reduction
HKL-2000data scaling

Structure Validation

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Entry History 

Deposition Data

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

Revision History  (Full details and data files)

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