3AUI | pdb_00003aui

A simplified BPTI variant with poly Glu amino acid tag (C3E) at the C-terminus

• PDB DOI: https://doi.org/10.2210/pdb3AUI/pdb

• Classification: HYDROLASE INHIBITOR
• Organism(s): Bos taurus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2011-02-03 Released: 2012-02-08 
• Deposition Author(s): Islam, M.M., Kato, A., Khan, M.M.A., Noguchi, K., Yohda, M., Kidokoro, S.I., Kuroda, Y.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.85 Å
• R-Value Free: 
  0.312 (Depositor), 0.313 (DCC) 
• R-Value Work: 
  0.223 (Depositor) 
• R-Value Observed: 
  0.227 (Depositor) 

Starting Model: experimental

Literature

Effect of amino acid mutations on protein's solubility, function and structure characterized using short poly amino acid peptide tags

Islam, M.M., Kato, A., Khan, M.M.A., Noguchi, K., Yohda, M., Kidokoro, S.I., Kuroda, Y.

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: 13.17 kDa 
• Atom Count: 1,032 
• Modeled Residue Count: 115 
• Deposited Residue Count: 126 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Bovine pancreatic trypsin inhibitor	A, B	63	Bos taurus	Mutation(s): 0

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
SO4	C [auth A], D [auth B]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.85 Å
• R-Value Free:  0.312 (Depositor), 0.313 (DCC) 
• R-Value Work:  0.223 (Depositor) 
• R-Value Observed: 0.227 (Depositor) 

Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 64.849	α = 90
b = 48.858	β = 109.05
c = 36.79	γ = 90

Software Package:

Software Name	Purpose
HKL-2000	data collection
MOLREP	phasing
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2012-02-08 
Deposition Author(s): Islam, M.M., Kato, A., Khan, M.M.A., Noguchi, K., Yohda, M., Kidokoro, S.I., Kuroda, Y.

Revision History  

• Version 1.0: 2012-02-08
  Type: Initial release
  
• Version 1.1: 2023-11-01
  Changes: Data collection, Database references, Derived calculations, Refinement description
• Version 1.2: 2024-10-23
  Changes: Structure summary