1PPN

STRUCTURE OF MONOCLINIC PAPAIN AT 1.60 ANGSTROMS RESOLUTION

• PDB DOI: https://doi.org/10.2210/pdb1PPN/pdb

• Classification: HYDROLASE(SULFHYDRYL PROTEINASE)
• Organism(s): Carica papaya
• Mutation(s): No 


• Deposited: 1991-10-25 Released: 1994-01-31 
• Deposition Author(s): Pickersgill, R.W., Harris, G.W., Garman, E.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Work: 0.160 

Literature

Structure of Monoclinic Papain at 1.60 Angstroms Resolution

Pickersgill, R.W., Harris, G.W., Garman, E.

(1992) Acta Crystallogr B 48: 59-67

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content

• Total Structure Weight: 23.48 kDa 
• Atom Count: 1,888 
• Modelled Residue Count: 212 
• Deposited Residue Count: 212 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
PAPAIN	A	212	Carica papaya	Mutation(s): 0  EC: 3.4.22.2
UniProt
Find proteins for P00784 (Carica papaya) Explore P00784  Go to UniProtKB:  P00784

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MOH	C [auth A]	METHANOL C H4 O OKKJLVBELUTLKV-UHFFFAOYSA-N
UNL	B [auth A]	Unknown ligand OKKJLVBELUTLKV-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.60 Å
• R-Value Work: 0.160 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 65.7	α = 90
b = 50.7	β = 98.4
c = 31.5	γ = 90

Software Package:

Software Name	Purpose
PROLSQ	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 1994-01-31 
Deposition Author(s): Pickersgill, R.W., Harris, G.W., Garman, E.

Revision History  

• Version 1.0: 1994-01-31
  Type: Initial release
  
• Version 1.1: 2008-03-03
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2015-04-08
  Changes: Non-polymer description
• Version 1.4: 2024-06-05
  Changes: Data collection, Database references, Derived calculations, Other
• Version 1.5: 2024-10-23
  Changes: Structure summary