3RTO

Acoustically mounted porcine insulin microcrystals yield an X-ray SAD structure

• PDB DOI: https://doi.org/10.2210/pdb3RTO/pdb

• Classification: HORMONE
• Organism(s): Sus scrofa
• Mutation(s): No 


• Deposited: 2011-05-03 Released: 2011-05-18 
• Deposition Author(s): Soares, A.S., Engel, M.A., Stearns, R., Datwani, S., Olechno, J., Ellson, R., Skinner, J.M., Allaire, M., Orville, A.M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.223 
• R-Value Work: 0.181 
• R-Value Observed: 0.183 

Starting Model: experimental

Literature

Acoustically Mounted Microcrystals Yield High-Resolution X-ray Structures.

Soares, A.S., Engel, M.A., Stearns, R., Datwani, S., Olechno, J., Ellson, R., Skinner, J.M., Allaire, M., Orville, A.M.

(2011) Biochemistry 50: 4399-4401

• PubMed: 21542590 
• DOI: https://doi.org/10.1021/bi200549x
• Primary Citation of Related Structures:  
  3RTO


• PubMed Abstract: 
  

  We demonstrate a general strategy for determining structures from showers of microcrystals. It uses acoustic droplet ejection to transfer 2.5 nL droplets from the surface of microcrystal slurries, through the air, onto mounting micromesh pins. Individual microcrystals are located by raster-scanning a several-micrometer X-ray beam across the cryocooled micromeshes. X-ray diffraction data sets merged from several micrometer-sized crystals are used to determine 1.8 Ǻ resolution crystal structures.

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Organizational Affiliation: 

Biology Department, Brookhaven National Laboratory, Upton, NY 11973-5000, USA. [e-mail]

Biological Assembly 1  

Global Symmetry: Dihedral - D3  (Explore in 3D)
Global Stoichiometry: Hetero 12-mer - A6B6 Pseudo Symmetry: Cyclic - C3  (Explore in 3D)
Pseudo Stoichiometry: Hetero 12-mer - A6B3C3 

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

Macromolecule Content

• Total Structure Weight: 11.71 kDa 
• Atom Count: 907 
• Modelled Residue Count: 102 
• Deposited Residue Count: 102 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Insulin	A, C	21	Sus scrofa	Mutation(s): 0
UniProt
Find proteins for P01315 (Sus scrofa) Explore P01315  Go to UniProtKB:  P01315

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
Insulin	B, D	30	Sus scrofa	Mutation(s): 0
UniProt
Find proteins for P01315 (Sus scrofa) Explore P01315  Go to UniProtKB:  P01315

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
ZN	E [auth B], F [auth D]	ZINC ION Zn PTFCDOFLOPIGGS-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 0.223 
• R-Value Work: 0.181 
• R-Value Observed: 0.183 
• Space Group: H 3

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 81.7	α = 90
b = 81.7	β = 90
c = 33.8	γ = 120

Software Package:

Software Name	Purpose
CBASS	data collection
SHELXS	phasing
REFMAC	refinement
HKL-2000	data reduction
HKL-2000	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2011-05-18 
Deposition Author(s): Soares, A.S., Engel, M.A., Stearns, R., Datwani, S., Olechno, J., Ellson, R., Skinner, J.M., Allaire, M., Orville, A.M.

Revision History  

• Version 1.0: 2011-05-18
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2023-09-13
  Changes: Data collection, Database references, Derived calculations, Refinement description
• Version 1.3: 2024-11-06
  Changes: Structure summary