1BB1

CRYSTAL STRUCTURE OF A DESIGNED, THERMOSTABLE HETEROTRIMERIC COILED COIL


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.208 

wwPDB Validation 3D Report Full Report


This is version 1.2 of the entry. See complete history

Literature

Crystal structure of a designed, thermostable, heterotrimeric coiled coil.

Nautiyal, S.Alber, T.

(1999) Protein Sci. 8: 84-90

  • DOI: 10.1110/ps.8.1.84

  • PubMed Abstract: 
  • Electrostatic interactions are often critical for determining the specificity of protein-protein complexes. To study the role of electrostatic interactions for assembly of helical bundles, we previously designed a thermostable, heterotrimeric coiled ...

    Electrostatic interactions are often critical for determining the specificity of protein-protein complexes. To study the role of electrostatic interactions for assembly of helical bundles, we previously designed a thermostable, heterotrimeric coiled coil, ABC, in which charged residues were employed to drive preferential association of three distinct, 34-residue helices. To investigate the basis for heterotrimer specificity, we have used multiwavelength anomalous diffraction (MAD) analysis to determine the 1.8 A resolution crystal structure of ABC. The structure shows that ABC forms a heterotrimeric coiled coil with the intended arrangement of parallel chains. Over half of the ion pairs engineered to restrict helix associations were apparent in the experimental electron density map. As seen in other trimeric coiled coils, ABC displays acute knobs-into-holes packing and a buried anion coordinated by core polar amino acids. These interactions validate the design strategy and illustrate how packing and polar contacts determine structural uniqueness.


    Related Citations: 
    • A Designed Heterotrimeric Coiled Coil
      Nautiyal, S.,Woolfson, D.N.,King, D.S.,Alber, T.
      (1995) Biochemistry 34: 11645


    Organizational Affiliation

    Department of Molecular and Cell Biology, University of California, Berkeley 94720-3206, USA.




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
DESIGNED, THERMOSTABLE HETEROTRIMERIC COILED COIL
A
36N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 2
MoleculeChainsSequence LengthOrganismDetails
DESIGNED, THERMOSTABLE HETEROTRIMERIC COILED COIL
B
36N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Entity ID: 3
MoleculeChainsSequence LengthOrganismDetails
DESIGNED, THERMOSTABLE HETEROTRIMERIC COILED COIL
C
36N/AN/A
Protein Feature View is not available: No corresponding UniProt sequence found.
Small Molecules
Ligands 1 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
CL
Query on CL

Download SDF File 
Download CCD File 
A
CHLORIDE ION
Cl
VEXZGXHMUGYJMC-UHFFFAOYSA-M
 Ligand Interaction
Modified Residues  2 Unique
IDChainsTypeFormula2D DiagramParent
NH2
Query on NH2
A, B, C
NON-POLYMERH2 N

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ACE
Query on ACE
A, B, C
NON-POLYMERC2 H4 O

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Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.8 Å
  • R-Value Free: 0.269 
  • R-Value Work: 0.208 
  • Space Group: P 1 21 1
Unit Cell:
Length (Å)Angle (°)
a = 21.930α = 90.00
b = 35.010β = 93.70
c = 66.460γ = 90.00
Software Package:
Software NamePurpose
X-PLORrefinement
X-PLORphasing
CCP4data scaling
DENZOdata reduction
X-PLORmodel building

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

Revision History 

  • Version 1.0: 1999-02-02
    Type: Initial release
  • Version 1.1: 2008-03-03
    Type: Version format compliance
  • Version 1.2: 2011-07-13
    Type: Version format compliance