2PQX | pdb_00002pqx

E. coli RNase 1 (in vivo folded)

• PDB DOI: https://doi.org/10.2210/pdb2PQX/pdb

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


• Deposited: 2007-05-03 Released: 2007-09-18 
• Deposition Author(s): Messens, J., Loris, R., Wyns, L.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.42 Å
• R-Value Free: 
  0.202 (Depositor), 0.208 (DCC) 
• R-Value Work: 
  0.188 (Depositor), 0.192 (DCC) 

Literature

Crystal structure of E. coli ribonuclease 1

Messens, J., Collet, J.F., Loris, R., Wyns, L.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 27.43 kDa 
• Atom Count: 2,095 
• Modeled Residue Count: 245 
• Deposited Residue Count: 245 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Ribonuclease I	A	245	Escherichia coli	Mutation(s): 0  Gene Names: rna, rnsA EC: 3.1.27.6 (PDB Primary Data), 4.6.1.21 (UniProt)
UniProt
Find proteins for P21338 (Escherichia coli (strain K12)) Explore P21338  Go to UniProtKB:  P21338

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
MES	C [auth A]	2-(N-MORPHOLINO)-ETHANESULFONIC ACID C6 H13 N O4 S SXGZJKUKBWWHRA-UHFFFAOYSA-N
CA	B [auth A]	CALCIUM ION Ca BHPQYMZQTOCNFJ-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.42 Å
• R-Value Free:  0.202 (Depositor), 0.208 (DCC) 
• R-Value Work:  0.188 (Depositor), 0.192 (DCC) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 39.894	α = 90
b = 49.626	β = 96.863
c = 53.398	γ = 90

Software Package:

Software Name	Purpose
MAR345	data collection
MLPHARE	phasing
CNS	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2007-09-18 
Deposition Author(s): Messens, J., Loris, R., Wyns, L.

Revision History  

• Version 1.0: 2007-09-18
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2017-10-18
  Changes: Refinement description
• Version 1.3: 2024-10-09
  Changes: Data collection, Database references, Derived calculations, Structure summary