8AQO

Streptavidin with a bisbiothinilated Fe4S4 cluster

• PDB DOI: https://doi.org/10.2210/pdb8AQO/pdb

• Classification: UNKNOWN FUNCTION
• Organism(s): Streptomyces avidinii
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2022-08-13 Released: 2023-08-23 
• Deposition Author(s): Igareta, N.V., Ward, T.R.
• Funding Organization(s): Not funded

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.217 
• R-Value Work: 0.184 
• R-Value Observed: 0.185 

Literature

Hydrophobic probe bound to Streptavidin - 1

Igareta, N.V., Ward, T.R.

To be published.

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)

Biological Assembly Evidence: mass spectrometry

Macromolecule Content

• Total Structure Weight: 68.03 kDa 
• Atom Count: 4,043 
• Modelled Residue Count: 492 
• Deposited Residue Count: 632 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Streptavidin	A, B, C, D	158	Streptomyces avidinii	Mutation(s): 2
UniProt
Find proteins for P22629 (Streptomyces avidinii) Explore P22629  Go to UniProtKB:  P22629

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
NUI (Subject of Investigation/LOI)	E [auth A], F [auth C]	5-[(3~{a}~{S},4~{S},6~{a}~{R})-2-oxidanylidene-1,3,3~{a},4,6,6~{a}-hexahydrothieno[3,4-d]imidazol-4-yl]-~{N}-[2-[[20-[2-[5-[(3~{a}~{S},4~{S},6~{a}~{R})-2-oxidanylidene-1,3,3~{a},4,6,6~{a}-hexahydrothieno[3,4-d]imidazol-4-yl]pentanoylamino]ethanoylamino]-2$l^{3},4,12,14$l^{3},16,24,25$l^{3},27$l^{3}-octathia-1$l^{4},3$l^{4},13$l^{4},15$l^{4}-tetraferranonacyclo[11.11.1.1^{1,13}.1^{6,10}.1^{18,22}.0^{2,15}.0^{3,14}.0^{3,25}.0^{15,27}]octacosa-6(28),7,9,18,20,22(26)-hexaen-8-yl]amino]-2-oxidanylidene-ethyl]pentanamide C40 H52 Fe4 N8 O6 S10 BUAXODRGONQWCA-XTALMZNNSA-J

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.217 
• R-Value Work: 0.184 
• R-Value Observed: 0.185 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 114.778	α = 90
b = 89.134	β = 97.57
c = 57.709	γ = 90

Software Package:

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

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2023-08-23 
Deposition Author(s): Igareta, N.V., Ward, T.R.

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Funding Organization	Location	Grant Number
Not funded		--

Revision History  

• Version 1.0: 2023-08-23
  Type: Initial release