7ZX9

Streptavidin with a fluorescent substrate

• PDB DOI: https://doi.org/10.2210/pdb7ZX9/pdb

• Classification: METAL BINDING PROTEIN
• Organism(s): Streptomyces avidinii
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2022-05-20 Released: 2022-06-15 
• Deposition Author(s): Igareta, N.V., Ward, T.R.
• Funding Organization(s): Swiss National Science Foundation

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.55 Å
• R-Value Free: 0.199 
• R-Value Work: 0.176 

Literature

Streptavidin Iron-Porphyrin

Igareta, N.V.

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: 17.04 kDa 
• Atom Count: 1,084 
• Modelled Residue Count: 124 
• Deposited Residue Count: 158 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Streptavidin	A	158	Streptomyces avidinii	Mutation(s): 0
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
K9D (Subject of Investigation/LOI)	B [auth A]	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-[6-(3,4-dihydro-1~{H}-isoquinolin-2-yl)-1,3-bis(oxidanylidene)benzo[de]isoquinolin-2-yl]ethyl]pentanamide C33 H35 N5 O4 S OIYWBNMJMDVZAF-XXJPWZBZSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.55 Å
• R-Value Free: 0.199 
• R-Value Work: 0.176 
• Space Group: I 4₁ 2 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 57.71	α = 90
b = 57.71	β = 90
c = 183.617	γ = 90

Software Package:

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

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2022-06-15 
Deposition Author(s): Igareta, N.V., Ward, T.R.

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Funding Organization	Location	Grant Number
Swiss National Science Foundation	Switzerland	--

Revision History  

• Version 1.0: 2022-06-15
  Type: Initial release
  
• Version 1.1: 2024-01-31
  Changes: Data collection, Refinement description