7ULG

recombinant alpha cobra toxin

• PDB DOI: https://doi.org/10.2210/pdb7ULG/pdb

• Classification: BIOSYNTHETIC PROTEIN
• Organism(s): Naja kaouthia
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2022-04-04 Released: 2023-05-03 
• Deposition Author(s): Xu, J., Lei, X., Chen, L.
• Funding Organization(s): National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.57 Å
• R-Value Free: 0.181 
• R-Value Work: 0.169 
• R-Value Observed: 0.170 

Literature

Structure of recombinant alpha cobra toxin at 1.57 Angstroms

Xu, J., Lei, X., Chen, L.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

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

Biological Assembly Evidence: gel filtration

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 assigned by authors and generated by PISA (software)

Biological Assembly 3  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 3 assigned by authors and generated by PISA (software)

Biological Assembly 4  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 4 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 32.19 kDa 
• Atom Count: 2,473 
• Modelled Residue Count: 272 
• Deposited Residue Count: 288 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Alpha-cobratoxin	A, B, C, D	72	Naja kaouthia	Mutation(s): 0
UniProt
Find proteins for P01391 (Naja kaouthia) Explore P01391  Go to UniProtKB:  P01391

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
EPE	E [auth B]	4-(2-HYDROXYETHYL)-1-PIPERAZINE ETHANESULFONIC ACID C8 H18 N2 O4 S JKMHFZQWWAIEOD-UHFFFAOYSA-N
ACT	F [auth C]	ACETATE ION C2 H3 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.57 Å
• R-Value Free: 0.181 
• R-Value Work: 0.169 
• R-Value Observed: 0.170 
• Space Group: P 3 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 73.969	α = 90
b = 73.969	β = 90
c = 110.841	γ = 120

Software Package:

Software Name	Purpose
PHENIX	refinement
iMOSFLM	data reduction
Aimless	data scaling
PHASER	phasing

Structure Validation

Entry History & Funding Information

Deposition Data

• Released Date: 2023-05-03 
Deposition Author(s): Xu, J., Lei, X., Chen, L.

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Funding Organization	Location	Grant Number
National Institutes of Health/National Institute of General Medical Sciences (NIH/NIGMS)	United States	R01GM064642

Revision History  

• Version 1.0: 2023-05-03
  Type: Initial release
  
• Version 1.1: 2023-10-25
  Changes: Data collection, Refinement description