Biological Assembly 1  

 3D View: Structure | Ligand Interaction

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Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 41762.97 
• Atom Count: 2895 
• Residue Count: 332 
• Unique protein chains: 1

1AU1

HUMAN INTERFERON-BETA CRYSTAL STRUCTURE

• DOI: 10.2210/pdb1AU1/pdb

• Classification: INTERFERON
• Organism(s): Homo sapiens
• Expression System: Cricetulus griseus


• Deposited: 1997-09-09 Released: 1998-06-17 
• Deposition Author(s): Karpusas, M., Nolte, M., Lipscomb, W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.2 Å
• R-Value Free: 0.283 
• R-Value Work: 0.223 

Literature

The crystal structure of human interferon beta at 2.2-A resolution.

Karpusas, M., Nolte, M., Benton, C.B., Meier, W., Lipscomb, W.N., Goelz, S.

(1997) Proc.Natl.Acad.Sci.USA 94: 11813-11818

• PubMed: 9342320 
• DOI: 10.1073/pnas.94.22.11813


• PubMed Abstract: 
  

Type I interferons (IFNs) are helical cytokines that have diverse biological activities despite the fact that they appear to interact with the same receptor system. To achieve a better understanding of the structural basis for the different activities of alpha and beta IFNs, we have determined the crystal structure of glycosylated human IFN-beta at 2.2-A resolution by molecular replacement. The molecule adopts a fold similar to that of the previously determined structures of murine IFN-beta and human IFN-alpha2b but displays several distinct structural features. Like human IFN-alpha2b, human IFN-beta contains a zinc-binding site at the interface of the two molecules in the asymmetric unit, raising the question of functional relevance for IFN-beta dimers. However, unlike the human IFN-alpha2b dimer, in which homologous surfaces form the interface, human IFN-beta dimerizes with contact surfaces from opposite sides of the molecule. The relevance of the structure to the effects of point mutations in IFN-beta at specific exposed residues is discussed. A potential role of ligand-ligand interactions in the conformational assembly of IFN receptor components is discussed.

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Organizational Affiliation: 

Biogen, Inc., 12 Cambridge Center, Cambridge, MA 02142, USA. [e-mail]

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
INTERFERON-BETA	A, B	166	Homo sapiens	Mutation(s): 0  Gene Names: IFNB1 (IFB, IFNB)
Find proteins for P01574 (Homo sapiens) Go to Gene View: IFNB1 Go to UniProtKB:  P01574

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
ZN	B	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N
BGC	A, B	BETA-D-GLUCOSE C6 H12 O6 WQZGKKKJIJFFOK-VFUOTHLCSA-N
G6D	A, B	6-DEOXY-ALPHA-D-GLUCOSE D-Quinovose C6 H12 O5 SHZGCJCMOBCMKK-DVKNGEFBSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.2 Å
• R-Value Free: 0.283 
• R-Value Work: 0.223 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length (Å)	Angle (°)
a = 55.300	α = 90.00
b = 65.900	β = 90.00
c = 121.500	γ = 90.00

Software Package:

Software Name	Purpose
bioteX	data collection
X-PLOR	model building
X-PLOR	phasing
bioteX	data reduction
AMoRE	phasing
X-PLOR	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1997-09-09 
• Released Date: 1998-06-17 
• Deposition Author(s): Karpusas, M., Nolte, M., Lipscomb, W.

Revision History 

• Version 1.0: 1998-06-17
  Type: Initial release
• Version 1.1: 2008-03-03
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 2.0: 2017-10-25
  Type: Advisory, Atomic model, Refinement description, Structure summary