Biological Assembly 1  

 3D View: Structure | Electron Density

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 17512.94 
• Atom Count: 1228 
• Residue Count: 153 
• Unique protein chains: 1

1TP0

Triple mutation in interleukin 1 beta cavity:replacement of phenylalanines with tryptophan.

• DOI: 10.2210/pdb1TP0/pdb

• Classification: IMMUNE SYSTEM
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): 3 


• Deposited: 2004-06-15 Released: 2005-02-08 
• Deposition Author(s): Adamek, D.H., Guerrero, L., Caspar, D.L.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.2 Å
• R-Value Free: 0.237 
• R-Value Work: 0.205 

Literature

Structural and energetic consequences of mutations in a solvated hydrophobic cavity.

Adamek, D.H., Guerrero, L., Blaber, M., Caspar, D.L.

(2005) J.Mol.Biol. 346: 307-318

• PubMed: 15663946 
• DOI: 10.1016/j.jmb.2004.11.046
• Primary Citation of Related Structures:  
  1TWE, 1TWM, 1TOO, 1T4Q, 1S0L


• PubMed Abstract: 
  

The structural and energetic consequences of modifications to the hydrophobic cavity of interleukin 1-beta (IL-1beta) are described. Previous reports demonstrated that the entirely hydrophobic cavity of IL-1beta contains positionally disordered water. To gain a better understanding of the nature of this cavity and the water therein, a number of mutant proteins were constructed by site-directed mutagenesis, designed to result in altered hydrophobicity of the cavity. These mutations involve the replacement of specific phenylalanine residues, which circumscribe the cavity, with tyrosine, tryptophan, leucine and isoleucine. Using differential scanning calorimetry to determine the relative stabilities of the wild-type and mutant proteins, we found all of the mutants to be destabilizing. X-ray crystallography was used to identify the structural consequences of the mutations. No clear correlation between the hydrophobicities of the specific side-chains introduced and the resulting stabilities was found.

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Organizational Affiliation: 

Institute of Molecular Biophysics, Florida State University, Tallahassee, FL 32306-4380, USA. [e-mail]

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Interleukin-1 beta	A	153	Homo sapiens	Mutation(s): 3  Gene Names: IL1B (IL1F2)
Find proteins for P01584 (Homo sapiens) Go to Gene View: IL1B Go to UniProtKB:  P01584

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.2 Å
• R-Value Free: 0.237 
• R-Value Work: 0.205 
• Space Group: P 4₃

Unit Cell:

Length (Å)	Angle (°)
a = 54.970	α = 90.00
b = 54.970	β = 90.00
c = 76.890	γ = 90.00

Software Package:

Software Name	Purpose
CNS	refinement
MAR345	data collection
SCALEPACK	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2004-06-15 
• Released Date: 2005-02-08 
• Deposition Author(s): Adamek, D.H., Guerrero, L., Caspar, D.L.

Revision History 

• Version 1.0: 2005-02-08
  Type: Initial release
• Version 1.1: 2008-04-30
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 1.3: 2017-10-11
  Type: Refinement description