6AY7

Cartilage homing cysteine-dense-peptides

• PDB DOI: https://doi.org/10.2210/pdb6AY7/pdb

• Classification: TOXIN
• Organism(s): Androctonus australis
• Expression System: Homo sapiens
• Mutation(s): No 


• Deposited: 2017-09-07 Released: 2018-08-22 
• Deposition Author(s): Gewe, M.M., Strong, R.K.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.77 Å
• R-Value Free: 0.193 
• R-Value Work: 0.140 
• R-Value Observed: 0.143 

Starting Model: experimental

Literature

Cartilage homing cysteine-dense-peptides

Gewe, M.M.

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 2  

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

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

Macromolecule Content

• Total Structure Weight: 9.29 kDa 
• Atom Count: 711 
• Modelled Residue Count: 78 
• Deposited Residue Count: 78 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Potassium channel toxin alpha-KTx 3.5	A, B	39	Androctonus australis	Mutation(s): 0  Gene Names: KTX2
UniProt
Find proteins for P45696 (Androctonus australis) Explore P45696  Go to UniProtKB:  P45696

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
TFA	E [auth A], H [auth B]	trifluoroacetic acid C2 H F3 O2 DTQVDTLACAAQTR-UHFFFAOYSA-N
SO4	C [auth A], D [auth A], G [auth B]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
CL	F [auth A], I [auth B]	CHLORIDE ION Cl VEXZGXHMUGYJMC-UHFFFAOYSA-M

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.77 Å
• R-Value Free: 0.193 
• R-Value Work: 0.140 
• R-Value Observed: 0.143 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 27.838	α = 90
b = 47.125	β = 90
c = 48.538	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling
PHASER	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2018-08-22 
Deposition Author(s): Gewe, M.M., Strong, R.K.

Revision History  

• Version 1.0: 2018-08-22
  Type: Initial release
  
• Version 1.1: 2023-10-04
  Changes: Data collection, Database references, Refinement description
• Version 1.2: 2024-10-30
  Changes: Structure summary