Biological Assembly 1  

 3D View: Structure | Ligand Interaction

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: 41.76 kDa 
• Atom Count: 2976 
• Residue Count: 329 
• 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
• Mutation(s): No 


• 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: 2.20 Å
• R-Value Free: 0.283 
• R-Value Work: 0.223 
• R-Value Observed: 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 U S A 94: 11813-11818

• PubMed: 9342320 
• DOI: 10.1073/pnas.94.22.11813
• Structures With Same Primary Citation


• 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

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 UniProtKB:  P01574
NIH Common Fund Data Resources
PHAROS  P01574 GTEx  ENSG00000171855

Small Molecules

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

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 0.283 
• R-Value Work: 0.223 
• R-Value Observed: 0.223 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 55.3	α = 90
b = 65.9	β = 90
c = 121.5	γ = 90

Software Package:

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

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
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 2.0: 2017-10-25
  Changes: Advisory, Atomic model, Refinement description, Structure summary