2AF5

2.5A X-ray Structure of Engineered OspA protein


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.242 

wwPDB Validation 3D Report Full Report


This is version 1.3 of the entry. See complete history

Literature

Atomic structures of peptide self-assembly mimics.

Makabe, K.McElheny, D.Tereshko, V.Hilyard, A.Gawlak, G.Yan, S.Koide, A.Koide, S.

(2006) Proc.Natl.Acad.Sci.Usa 103: 17753-17758

  • DOI: 10.1073/pnas.0606690103
  • Primary Citation of Related Structures:  2FKG, 2FKJ, 2HKD

  • PubMed Abstract: 
  • Although the beta-rich self-assemblies are a major structural class for polypeptides and the focus of intense research, little is known about their atomic structures and dynamics due to their insoluble and noncrystalline nature. We developed a protei ...

    Although the beta-rich self-assemblies are a major structural class for polypeptides and the focus of intense research, little is known about their atomic structures and dynamics due to their insoluble and noncrystalline nature. We developed a protein engineering strategy that captures a self-assembly segment in a water-soluble molecule. A predefined number of self-assembling peptide units are linked, and the beta-sheet ends are capped to prevent aggregation, which yields a mono-dispersed soluble protein. We tested this strategy by using Borrelia outer surface protein (OspA) whose single-layer beta-sheet located between two globular domains consists of two beta-hairpin units and thus can be considered as a prototype of self-assembly. We constructed self-assembly mimics of different sizes and determined their atomic structures using x-ray crystallography and NMR spectroscopy. Highly regular beta-sheet geometries were maintained in these structures, and peptide units had a nearly identical conformation, supporting the concept that a peptide in the regular beta-geometry is primed for self-assembly. However, we found small but significant differences in the relative orientation between adjacent peptide units in terms of beta-sheet twist and bend, suggesting their inherent flexibility. Modeling shows how this conformational diversity, when propagated over a large number of peptide units, can lead to a substantial degree of nanoscale polymorphism of self-assemblies.


    Related Citations: 
    • Design of single-layer beta-sheets without a hydrophobic core
      Koide, S.,Huang, X.,Link, K.,Koide, A.,Bu, Z.,Engleman, D.M.
      (2000) Nature 403: 456


    Organizational Affiliation

    Department of Biochemistry and Molecular Biology, University of Chicago, Chicago, IL 60637, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
Engineered Outer Surface Protein A (OspA) with the inserted two beta-hairpins
A
297Borrelia burgdorferi (strain ATCC 35210 / B31 / CIP 102532 / DSM 4680)Gene Names: ospA
Find proteins for P0CL66 (Borrelia burgdorferi (strain ATCC 35210 / B31 / CIP 102532 / DSM 4680))
Go to UniProtKB:  P0CL66
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.5 Å
  • R-Value Free: 0.276 
  • R-Value Work: 0.242 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 48.547α = 90.00
b = 55.330β = 104.08
c = 70.361γ = 90.00
Software Package:
Software NamePurpose
MOLREPphasing
SCALEPACKdata scaling
REFMACrefinement
HKL-2000data reduction

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 2006-08-01
    Type: Initial release
  • Version 1.1: 2008-04-30
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Advisory, Version format compliance
  • Version 1.3: 2017-08-16
    Type: Source and taxonomy