1B2D

PH AFFECTS GLU B13 SWITCHING AND SULFATE BINDING IN CUBIC INSULIN CRYSTALS (PH 6.35 COORDINATES)

• PDB DOI: https://doi.org/10.2210/pdb1B2D/pdb

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


• Deposited: 1998-11-26 Released: 2003-04-08 
• Deposition Author(s): Diao, J.S., Caspar, D.L.D.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free: 0.229 
• R-Value Work: 0.193 
• R-Value Observed: 0.193 

Literature

Crystallographic titration of cubic insulin crystals: pH affects GluB13 switching and sulfate binding.

Diao, J.

(2003) Acta Crystallogr D Biol Crystallogr 59: 670-676

• PubMed: 12657786 
• DOI: https://doi.org/10.1107/s0907444903002208
• Primary Citation of Related Structures:  
  1B17, 1B18, 1B19, 1B2A, 1B2B, 1B2C, 1B2D, 1B2E, 1B2F, 1B2G


• PubMed Abstract: 
  

  Structures of porcine insulin crystals soaked in 1 M sodium sulfate at pH 5.00, 5.53, 5.80, 6.00, 6.16, 6.26, 6.35, 6.50, 6.98 and 9.00 have been determined at between 1.7 and 1.9 A resolution. GluB13 exhibits a single conformation at pH

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Organizational Affiliation: 

Institute of Molecular Biophysics, Florida State University, Tallahassee 32306, USA. [e-mail]

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Hetero 2-mer - A1B1 

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

Biological Assembly 2  

Global Symmetry: Cyclic - C3  (Explore in 3D)
Global Stoichiometry: Hetero 6-mer - A3B3 

Biological assembly 2 generated by PISA (software)

Biological Assembly 3  

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

Biological assembly 3 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 5.88 kDa 
• Atom Count: 482 
• Modelled Residue Count: 51 
• Deposited Residue Count: 51 
• Unique protein chains: 2

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (INSULIN A CHAIN)	A	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
PROTEIN (INSULIN B CHAIN)	B	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
SO4	C [auth B]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.70 Å
• R-Value Free: 0.229 
• R-Value Work: 0.193 
• R-Value Observed: 0.193 
• Space Group: I 2₁ 3

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 78.811	α = 90
b = 78.811	β = 90
c = 78.811	γ = 90

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
X-PLOR	model building
X-PLOR	refinement
X-PLOR	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2003-04-08 
Deposition Author(s): Diao, J.S., Caspar, D.L.D.

Revision History  

• Version 1.0: 2003-04-08
  Type: Initial release
  
• Version 1.1: 2008-04-26
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2023-12-27
  Changes: Data collection, Database references, Derived calculations
• Version 1.4: 2024-10-30
  Changes: Structure summary