8UG2 | pdb_00008ug2

Crystal structure of de novo designed metal-controlled heterodimer of mutant B1 immunoglobulin-binding domain of Streptococcal Protein G MCHeT_A + MCHeT_C

• PDB DOI: https://doi.org/10.2210/pdb8UG2/pdb

• Classification: DE NOVO PROTEIN
• Organism(s): Streptococcus pyogenes
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2023-10-05 Released: 2024-10-09 
• Deposition Author(s): Mealka, M., Maniaci, B., Stec, B., Huxford, T.
• Funding Organization(s): Army Research Office

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.36 Å
• R-Value Free: 
  0.173 (Depositor), 0.175 (DCC) 
• R-Value Work: 
  0.144 (Depositor), 0.145 (DCC) 
• R-Value Observed: 
  0.146 (Depositor) 

Starting Model: experimental

Literature

Design of Protein Heterodimers Utilizing Metal-Ligand and Salt-Bridge Interactions

Maniaci, B., Mealka, M., Bobkov, A., Stec, B., Huxford, T., Love, J.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 12.68 kDa 
• Atom Count: 977 
• Modeled Residue Count: 112 
• Deposited Residue Count: 112 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Beta 1 domain of streptococcal protein G (G beta 1) MCHetA	A	56	Streptococcus pyogenes	Mutation(s): 0

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Beta 1 domain of streptococcal protein G (G beta 1) MCHetC	B	56	Streptococcus pyogenes	Mutation(s): 0

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN (Subject of Investigation/LOI)	C [auth A], D [auth A]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N
EDO	F [auth A]	1,2-ETHANEDIOL C2 H6 O2 LYCAIKOWRPUZTN-UHFFFAOYSA-N
CL (Subject of Investigation/LOI)	E [auth A], G [auth B]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.36 Å
• R-Value Free:  0.173 (Depositor), 0.175 (DCC) 
• R-Value Work:  0.144 (Depositor), 0.145 (DCC) 
• R-Value Observed: 0.146 (Depositor) 

Space Group: I 4₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 69.859	α = 90
b = 69.859	β = 90
c = 25.732	γ = 90

Software Package:

Software Name	Purpose
PHENIX	refinement
PHENIX	refinement
XDS	data reduction
XDS	data scaling
PHENIX	phasing

Structure Validation

Entry History 

& Funding Information

Deposition Data

• Released Date: 2024-10-09 
Deposition Author(s): Mealka, M., Maniaci, B., Stec, B., Huxford, T.

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Funding Organization	Location	Grant Number
Army Research Office	United States	W911NF-13-1-0155

Revision History  

• Version 1.0: 2024-10-09
  Type: Initial release