Biological Assembly 1  

 3D View: Structure | Electron Density

Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Hetero 4-mer - A2B2 

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

Macromolecule Content

• Total Structure Weight: 5.72 kDa 
• Atom Count: 427 
• Modelled Residue Count: 50 
• Deposited Residue Count: 50 
• Unique protein chains: 2

2C8Q

insuline(1sec) and UV laser excited fluorescence

• DOI: 10.2210/pdb2C8Q/pdb

• Classification: HORMONE
• Organism(s): Homo sapiens
• Mutation(s): No 


• Deposited: 2005-12-06 Released: 2006-03-08 
• Deposition Author(s): Vernede, X., Lavault, B., Ohana, J., Nurizzo, D., Joly, J., Jacquamet, L., Felisaz, F., Cipriani, F., Bourgeois, D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Free: 0.230 
• R-Value Work: 0.207 
• R-Value Observed: 0.208 

Literature

Uv Laser-Excited Fluorescence as a Tool for the Visualization of Protein Crystals Mounted in Loops.

Vernede, X., Lavault, B., Ohana, J., Nurizzo, D., Joly, J., Jacquamet, L., Felisaz, F., Cipriani, F., Bourgeois, D.

(2006) Acta Crystallogr D Biol Crystallogr 62: 253

• PubMed: 16510972 
• DOI: 10.1107/S0907444905041429
• Primary Citation of Related Structures:  
  2C8R, 2C8Q, 2C8P, 2C8O


• PubMed Abstract: 
  

Structural proteomics has promoted the rapid development of automated protein structure determination using X-ray crystallography. Robotics are now routinely used along the pipeline from genes to protein structures. However, a bottleneck still remains. At synchrotron beamlines, the success rate of automated sample alignment along the X-ray beam is limited by difficulties in visualization of protein crystals, especially when they are small and embedded in mother liquor. Despite considerable improvement in optical microscopes, the use of visible light transmitted or reflected by the sample may result in poor or misleading contrast. Here, the endogenous fluorescence from aromatic amino acids has been used to identify even tiny or weakly fluorescent crystals with a high success rate. The use of a compact laser at 266 nm in combination with non-fluorescent sample holders provides an efficient solution to collect high-contrast fluorescence images in a few milliseconds and using standard camera optics. The best image quality was obtained with direct illumination through a viewing system coaxial with the UV beam. Crystallographic data suggest that the employed UV exposures do not generate detectable structural damage.

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Organizational Affiliation: 

LCCP, UMR 5075, IBS-CEA/CNRS/UJF, Grenoble, France.

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
INSULIN A CHAIN	A	21	Homo sapiens	Mutation(s): 0  Gene Names: INS
Find proteins for P01308 (Homo sapiens) Explore P01308  Go to UniProtKB:  P01308
NIH Common Fund Data Resources
PHAROS:  P01308

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
INSULIN B CHAIN	B	29	Homo sapiens	Mutation(s): 0  Gene Names: INS
Find proteins for P01308 (Homo sapiens) Explore P01308  Go to UniProtKB:  P01308
NIH Common Fund Data Resources
PHAROS:  P01308

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.95 Å
• R-Value Free: 0.230 
• R-Value Work: 0.207 
• R-Value Observed: 0.208 
• Space Group: I 2₁ 3

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 78.608	α = 90
b = 78.608	β = 90
c = 78.608	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
MOSFLM	data reduction
SCALA	data scaling
AMoRE	phasing

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2005-12-06 
• Released Date: 2006-03-08 
Deposition Author(s): Vernede, X., Lavault, B., Ohana, J., Nurizzo, D., Joly, J., Jacquamet, L., Felisaz, F., Cipriani, F., Bourgeois, D.

Revision History  

• Version 1.0: 2006-03-08
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Advisory, Version format compliance