3USV

Structure of the precursor of a thermostable variant of papain at 3.8 A resolution from a crystal soaked at pH 4

• PDB DOI: https://doi.org/10.2210/pdb3USV/pdb

• Classification: HYDROLASE
• Organism(s): Carica papaya
• Expression System: Escherichia coli
• Mutation(s): Yes 


• Deposited: 2011-11-24 Released: 2012-11-28 
• Deposition Author(s): Roy, S., Choudhury, D., Biswas, S., Dattagupta, J.K.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 3.80 Å
• R-Value Free: 0.408 
• R-Value Work: 0.358 
• R-Value Observed: 0.358 

Literature

Crystallographic analysis of pro-papain variant elucidates the structural basis of the step-wise activation mechanism of the zymogen

Roy, S., Choudhury, D., Biswas, S., Dattagupta, J.K.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly 2  

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

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 82.14 kDa 
• Atom Count: 3,020 
• Modelled Residue Count: 616 
• Deposited Residue Count: 726 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Papain	A, B [auth C]	363	Carica papaya	Mutation(s): 4  EC: 3.4.22.2
UniProt
Find proteins for P00784 (Carica papaya) Explore P00784  Go to UniProtKB:  P00784

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 3.80 Å
• R-Value Free: 0.408 
• R-Value Work: 0.358 
• R-Value Observed: 0.358 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 42.853	α = 90
b = 75.97	β = 97.71
c = 109.711	γ = 90

Software Package:

Software Name	Purpose
MAR345dtb	data collection
MOLREP	phasing
CNS	refinement
AUTOMAR	data reduction

Structure Validation

Entry History 

Deposition Data

• Released Date: 2012-11-28 
Deposition Author(s): Roy, S., Choudhury, D., Biswas, S., Dattagupta, J.K.

Revision History  

• Version 1.0: 2012-11-28
  Type: Initial release
  
• Version 1.1: 2023-11-08
  Changes: Data collection, Database references, Refinement description