3AJI

Structure of Gankyrin-S6ATPase photo-cross-linked site-specifically, and incoporated by genetic code expansion


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.171 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystallographic study of a site-specifically cross-linked protein complex with a genetically incorporated photoreactive amino acid

Sato, S.Mimasu, S.Sato, A.Hino, N.Sakamoto, K.Umehara, T.Yokoyama, S.

(2011) Biochemistry 50: 250-257

  • DOI: 10.1021/bi1016183

  • PubMed Abstract: 
  • The benzophenone photophore is widely used to photo-cross-link macromolecules. Recent developments in genetic code expansion have allowed the biosynthesis of proteins with p-benzoyl-L-phenylalanine (pBpa) at defined sites, for covalent bonding with i ...

    The benzophenone photophore is widely used to photo-cross-link macromolecules. Recent developments in genetic code expansion have allowed the biosynthesis of proteins with p-benzoyl-L-phenylalanine (pBpa) at defined sites, for covalent bonding with interacting proteins. However, the structure of a photo-cross-linked protein complex had not been revealed, and thus neither the actual structure of the "photobridge" in a complex nor the influence of this covalent bridge on the overall complex structure was known. In this study, we determine the crystal structure of the cross-linked complex of the liver oncoprotein gankyrin and the C-terminal domain of S6 proteasomal protein (S6C), at 2.05 Å resolution. First, the photoreactive amino acid was separately incorporated into gankyrin at 16 sites on the protein surface, and two variants that efficiently formed a covalent bond with S6C were found. The yield of one of the cross-linked products, with pBpa in place of Arg85 in gankyrin, was maximized for crystallization via optimization of the duration of complex exposure to 365 nm light. The structure revealed that the carbonyl group of the benzophenone of pBpa85 formed a covalent bond exclusively with the Cγ atom of Glu356 in S6C, showing the high selectivity of formation of cross-links by pBpa. In addition, the cross-linked structure exhibited little structural distortion from the native complex structure. Our results demonstrated that cross-linking with site-specifically incorporated pBpa preserves the native binding mode and is useful for probing protein-protein interactions.


    Organizational Affiliation

    RIKEN Systems and Structural Biology Center, Tsurumi, Yokohama, Japan.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
26S proteasome non-ATPase regulatory subunit 10
A, C
231Mus musculusMutation(s): 1 
Gene Names: Psmd10
Find proteins for Q9Z2X2 (Mus musculus)
Go to UniProtKB:  Q9Z2X2
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
Proteasome (Prosome, macropain) 26S subunit, ATPase, 4
B, D
83Mus musculusMutation(s): 0 
Gene Names: Psmc4 (Tbp7)
Find proteins for P54775 (Mus musculus)
Go to UniProtKB:  P54775
Small Molecules
Modified Residues  1 Unique
IDChainsTypeFormula2D DiagramParent
PBF
Query on PBF
A, C
L-PEPTIDE LINKINGC16 H15 N O3PHE
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.05 Å
  • R-Value Free: 0.229 
  • R-Value Work: 0.171 
  • Space Group: H 3
Unit Cell:
Length (Å)Angle (°)
a = 103.164α = 90.00
b = 103.164β = 90.00
c = 154.993γ = 120.00
Software Package:
Software NamePurpose
HKL-2000data collection
CNSrefinement
MOLREPphasing
SCALEPACKdata scaling
DENZOdata reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2010-12-22
    Type: Initial release
  • Version 1.1: 2011-07-13
    Type: Version format compliance
  • Version 1.2: 2014-01-29
    Type: Database references