4GN3

OBody AM1L10 bound to hen egg-white lysozyme


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.201 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Tracking Molecular Recognition at the Atomic Level with a New Protein Scaffold Based on the OB-Fold.

Steemson, J.D.Baake, M.Rakonjac, J.Arcus, V.L.Liddament, M.T.

(2014) PLoS One 9: e86050-e86050

  • DOI: https://doi.org/10.1371/journal.pone.0086050
  • Primary Citation of Related Structures:  
    4GLA, 4GLV, 4GN3, 4GN4, 4GN5

  • PubMed Abstract: 

    The OB-fold is a small, versatile single-domain protein binding module that occurs in all forms of life, where it binds protein, carbohydrate, nucleic acid and small-molecule ligands. We have exploited this natural plasticity to engineer a new class of non-immunoglobulin alternatives to antibodies with unique structural and biophysical characteristics. We present here the engineering of the OB-fold anticodon recognition domain from aspartyl tRNA synthetase taken from the thermophile Pyrobaculum aerophilum. For this single-domain scaffold we have coined the term OBody. Starting from a naïve combinatorial library, we engineered an OBody with 3 nM affinity for hen egg-white lysozyme, by optimising the affinity of a naïve OBody 11,700-fold over several affinity maturation steps, using phage display. At each maturation step a crystal structure of the engineered OBody in complex with hen egg-white lysozyme was determined, showing binding elements in atomic detail. These structures have given us an unprecedented insight into the directed evolution of affinity for a single antigen on the molecular scale. The engineered OBodies retain the high thermal stability of the parental OB-fold despite mutation of up to 22% of their residues. They can be expressed in soluble form and also purified from bacteria at high yields. They also lack disulfide bonds. These data demonstrate the potential of OBodies as a new scaffold for the engineering of specific binding reagents and provide a platform for further development of future OBody-based applications.


  • Organizational Affiliation

    Department of Biological Sciences, University of Waikato, Hamilton, New Zealand.


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
Lysozyme C
A, C, E, G, I
A, C, E, G, I, K, M, O, Q
129Gallus gallusMutation(s): 0 
EC: 3.2.1.17
UniProt
Find proteins for P00698 (Gallus gallus)
Explore P00698 
Go to UniProtKB:  P00698
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP00698
Sequence Annotations
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  • Reference Sequence
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 2
MoleculeChains Sequence LengthOrganismDetailsImage
OBody AM1L10
B, D, F, H, J
B, D, F, H, J, L, N, P, R
113Pyrobaculum aerophilumMutation(s): 0 
Gene Names: aspS
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
Sequence Annotations
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  • Reference Sequence
Small Molecules
Ligands 2 Unique
IDChains Name / Formula / InChI Key2D Diagram3D Interactions
EPE
Query on EPE

Download Ideal Coordinates CCD File 
CA [auth F]
FA [auth H]
IA [auth J]
KA [auth L]
OA [auth N]
CA [auth F],
FA [auth H],
IA [auth J],
KA [auth L],
OA [auth N],
QA [auth P],
SA [auth R],
U [auth B],
X [auth D]
4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID
C8 H18 N2 O4 S
JKMHFZQWWAIEOD-UHFFFAOYSA-N
GOL
Query on GOL

Download Ideal Coordinates CCD File 
AA [auth E]
BA [auth E]
DA [auth G]
EA [auth G]
GA [auth I]
AA [auth E],
BA [auth E],
DA [auth G],
EA [auth G],
GA [auth I],
HA [auth I],
JA [auth K],
LA [auth L],
MA [auth M],
NA [auth M],
PA [auth O],
RA [auth Q],
S [auth A],
T [auth A],
V [auth C],
W [auth C],
Y [auth D],
Z [auth D]
GLYCEROL
C3 H8 O3
PEDCQBHIVMGVHV-UHFFFAOYSA-N
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.95 Å
  • R-Value Free: 0.228 
  • R-Value Work: 0.199 
  • R-Value Observed: 0.201 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 60.54α = 90
b = 186.25β = 90
c = 245.68γ = 90
Software Package:
Software NamePurpose
XSCALEdata scaling
PHASERphasing
REFMACrefinement
PDB_EXTRACTdata extraction

Structure Validation

View Full Validation Report



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2013-08-21
    Type: Initial release
  • Version 1.1: 2014-02-12
    Changes: Database references