Biological Assembly 1  

 3D View: Structure | 1D-3D View | Electron Density | Validation Report | Ligand Interaction

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 18.79 kDa 
• Atom Count: 1396 
• Modelled Residue Count: 162 
• Deposited Residue Count: 164 
• Unique protein chains: 1

147L

ROLE OF BACKBONE FLEXIBILITY IN THE ACCOMMODATION OF VARIANTS THAT REPACK THE CORE OF T4 LYSOZYME

• PDB DOI: 10.2210/pdb147L/pdb

• Classification: HYDROLASE(O-GLYCOSYL)
• Organism(s): Escherichia virus T4
• Mutation(s): No 


• Deposited: 1993-10-15 Released: 1994-01-31 
• Deposition Author(s): Baldwin, E., Matthews, B.W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Observed: 0.166 

Literature

The role of backbone flexibility in the accommodation of variants that repack the core of T4 lysozyme.

Baldwin, E.P., Hajiseyedjavadi, O., Baase, W.A., Matthews, B.W.

(1993) Science 262: 1715-1718

• PubMed: 8259514 
• DOI: 10.1126/science.8259514
• Primary Citation of Related Structures:  
  140L, 141L, 142L, 143L, 144L, 145L, 146L, 147L


• PubMed Abstract: 
  

To understand better how the packing of side chains within the core influences protein structure and stability, the crystal structures were determined for eight variants of T4 lysozyme, each of which contains three to five substitutions at adjacent interior sites. Concerted main-chain and side-chain displacements, with movements of helical segments as large as 0.8 angstrom, were observed. In contrast, the angular conformations of the mutated side chains tended to remain unchanged, with torsion angles within 20 degrees of those in the wild-type structure. These observations suggest that not only the rotation of side chains but also movements of the main chain must be considered in the evaluation of which amino acid sequences are compatible with a given protein fold.

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Related Citations: 

• Construction and Functional Selection of a T4 Lysozyme Gene Library Randomly Mutagenized at Five Specific Sites
  Baldwin, E., Xu, J., Hajiseyedjavadi, O.
  (1993) Techniques In Protein Chemistry Iv --: 499

• Control of Enzyme Activity by an Engineered Disulfide Bond
  Matsumura, M., Matthews, B.W.
  (1989) Science 243: 792

• Structure of Bacteriophage T4 Lysozyme Refined at 1.7 Angstroms Resolution
  Weaver, L.H., Matthews, B.W.
  (1987) J Mol Biol 193: 189

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Organizational Affiliation: 

Institute of Molecular Biology, Howard Hughes Medical Institute, University of Oregon, Eugene 97403.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
T4 LYSOZYME	A	164	Escherichia virus T4	Mutation(s): 0  Gene Names: E EC: 3.2.1.17
UniProt
Find proteins for P00720 (Enterobacteria phage T4) Explore P00720  Go to UniProtKB:  P00720

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
BME	C [auth A], D [auth A]	BETA-MERCAPTOETHANOL C2 H6 O S DGVVWUTYPXICAM-UHFFFAOYSA-N
CL	B [auth A]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.00 Å
• R-Value Observed: 0.166 
• Space Group: P 3₂ 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 61.2	α = 90
b = 61.2	β = 90
c = 95.7	γ = 120

Software Package:

Software Name	Purpose
TNT	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1993-10-15 
• Released Date: 1994-01-31 
Deposition Author(s): Baldwin, E., Matthews, B.W.

Revision History  

• Version 1.0: 1994-01-31
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-11-29
  Changes: Derived calculations, Other