7ALX | pdb_00007alx

Sav-SOD: Chimeric Streptavidin-cSOD as Host for Artificial Metalloenzymes

• PDB DOI: https://doi.org/10.2210/pdb7ALX/pdb

• Classification: METAL BINDING PROTEIN
• Organism(s): Streptomyces avidinii, Mycobacterium tuberculosis variant bovis AF2122/97
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2020-10-07 Released: 2021-07-14 
• Deposition Author(s): Igareta, N.V., Christoffel, F., Peterson, R.L., Ward, T.R.
• Funding Organization(s): Swiss National Science Foundation, European Research Council (ERC)

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 
  0.218 (Depositor), 0.220 (DCC) 
• R-Value Work: 
  0.179 (Depositor), 0.190 (DCC) 

Starting Model: experimental

Literature

Design and evolution of chimeric streptavidin for protein-enabled dual gold catalysis

Christoffel, F., Igareta, N.V., Pellizzoni, M.M., Tiessler-Sala, L., Lozhkin, B., Spiess, D.C., Lledos, A., Marechal, J.D., Peterson, R.L., Ward, T.R.

(2021) Nat Catal 4: 643-653

• DOI: https://doi.org/10.1038/s41929-021-00651-9

Biological Assembly 1  

Global Symmetry: Dihedral - D2  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

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

Macromolecule Content 

• Total Structure Weight: 41.66 kDa 
• Atom Count: 2,086 
• Modeled Residue Count: 249 
• Deposited Residue Count: 388 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Streptavidin,Superoxide dismutase [Cu-Zn],Streptavidin	A [auth AAA], B [auth BBB]	194	Streptomyces avidinii, Mycobacterium tuberculosis variant bovis AF2122/97	Mutation(s): 1  EC: 1.15.1.1
UniProt
Find proteins for P0A609 (Mycobacterium bovis (strain ATCC BAA-935 / AF2122/97)) Explore P0A609  Go to UniProtKB:  P0A609
Find proteins for P22629 (Streptomyces avidinii) Explore P22629  Go to UniProtKB:  P22629
UniProt Groups	P22629P0A609

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
UFW (Subject of Investigation/LOI)	C [auth AAA], D [auth BBB]	((4S)-1,3-dimesityl-4-((5-((3aS,4S,6aR)-2-oxohexahydro-1H-thieno[3,4-d]imidazol-4-yl)pentanamido)methyl)imidazolidin-2-yl)gold C32 H43 Au N5 O2 S MQANASQMIINTPK-INIVJQHFSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free:  0.218 (Depositor), 0.220 (DCC) 
• R-Value Work:  0.179 (Depositor), 0.190 (DCC) 

Space Group: P 4₂ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 102.525	α = 90
b = 102.525	β = 90
c = 59.077	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
XDS	data reduction
PHASER	phasing
Aimless	data scaling

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2021-07-14 
Deposition Author(s): Igareta, N.V., Christoffel, F., Peterson, R.L., Ward, T.R.

---

Funding Organization	Location	Grant Number
Swiss National Science Foundation	Switzerland	200020_182046
European Research Council (ERC)	Switzerland	694424

Revision History  

• Version 1.0: 2021-07-14
  Type: Initial release
  
• Version 2.0: 2021-11-17
  Changes: Atomic model, Data collection, Database references
• Version 2.1: 2024-01-31
  Changes: Data collection, Derived calculations, Refinement description