Biological Assembly 1  

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 4-mer - A2B2 

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 59.35 kDa 
• Atom Count: 4,180 
• Modelled Residue Count: 524 
• Deposited Residue Count: 524 
• Unique protein chains: 2

 1FCC

CRYSTAL STRUCTURE OF THE C2 FRAGMENT OF STREPTOCOCCAL PROTEIN G IN COMPLEX WITH THE FC DOMAIN OF HUMAN IGG

• PDB DOI:  https://doi.org/10.2210/pdb1FCC/pdb

• Classification: COMPLEX (ANTIBODY/ANTIGEN)
• Organism(s): Homo sapiens, Streptococcus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1995-01-17 Released: 1995-04-20 
• Deposition Author(s): Sauer-Eriksson, A.E., Kleywegt, G.J., Uhlen, M., Jones, T.A.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Free: 0.357 
• R-Value Work: 0.289 
• R-Value Observed: 0.289 

Literature

Crystal structure of the C2 fragment of streptococcal protein G in complex with the Fc domain of human IgG.

Sauer-Eriksson, A.E., Kleywegt, G.J., Uhlen, M., Jones, T.A.

(1995) Structure 3: 265-278

• PubMed: 7788293 
• DOI: https://doi.org/10.1016/s0969-2126(01)00157-5
• Primary Citation of Related Structures:  
  1FCC


• PubMed Abstract: 
  

Streptococcal protein G comprises two or three domains that bind to the constant Fc region of most mammalian immunoglobulin Gs (IgGs). Protein G is functionally related to staphylococcal protein A, with which it shares neither sequence nor structural homology.

---

Organizational Affiliation: 

Department of Molecular Biology, Uppsala University, Sweden.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
IGG1 MO61 FC	A, C [auth B]	206	Homo sapiens	Mutation(s): 0  Gene Names: N-TERMINAL FRAGMENT OF, IGHG1
UniProt & NIH Common Fund Data Resources
Find proteins for P01857 (Homo sapiens) Explore P01857  Go to UniProtKB:  P01857
PHAROS:  P01857

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
STREPTOCOCCAL PROTEIN G (C2 FRAGMENT)	B [auth C], D	56	Streptococcus	Mutation(s): 0  Gene Names: N-TERMINAL FRAGMENT OF
UniProt
Find proteins for P19909 (Streptococcus sp. group G) Explore P19909  Go to UniProtKB:  P19909

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.20 Å
• R-Value Free: 0.357 
• R-Value Work: 0.289 
• R-Value Observed: 0.289 
• Space Group: P 4₃ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 110.6	α = 90
b = 110.6	β = 90
c = 160.3	γ = 90

Software Package:

Software Name	Purpose
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1995-04-20 
Deposition Author(s): Sauer-Eriksson, A.E., Kleywegt, G.J., Uhlen, M., Jones, T.A.

Revision History  

• Version 1.0: 1995-04-20
  Type: Initial release
  
• Version 1.1: 2008-03-24
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance