2EA1 | pdb_00002ea1

Crystal structure of Ribonuclease I from Escherichia coli COMPLEXED WITH GUANYLYL-2(PRIME),5(PRIME)-GUANOSINE

• PDB DOI: https://doi.org/10.2210/pdb2EA1/pdb

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


• Deposited: 2007-01-29 Released: 2008-01-22 
• Deposition Author(s): Zhou, K., Pan, J., Padmanabhan, S., Lim, R.W., Lim, L.W.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free: 
  0.257 (Depositor), 0.260 (DCC) 
• R-Value Work: 
  0.218 (Depositor), 0.220 (DCC) 
• R-Value Observed: 
  0.220 (Depositor) 

Literature

Crystal Structure of Ribonuclease I from Escherichia Coli Complexed with Guanylyl-2(Prime),5(Prime)-Guanosine at 1.80 Angstroms Resolution

Zhou, K., Pan, J., Padmanabhan, S., Lim, R.W., Lim, L.W.

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: 27.82 kDa 
• Atom Count: 2,094 
• Modelled 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  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 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
GPG	B [auth A]	GUANYLYL-2',5'-PHOSPHOGUANOSINE C20 H25 N10 O12 P YYNDAHWXMRBBRC-MHARETSRSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.80 Å
• R-Value Free:  0.257 (Depositor), 0.260 (DCC) 
• R-Value Work:  0.218 (Depositor), 0.220 (DCC) 
• R-Value Observed: 0.220 (Depositor) 

Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 43.2	α = 90
b = 49.87	β = 96.37
c = 54.52	γ = 90

Software Package:

Software Name	Purpose
AMoRE	phasing
REFMAC	refinement
DENZO	data reduction
SCALEPACK	data scaling

Structure Validation

Entry History 

Deposition Data

• Released Date: 2008-01-22 
Deposition Author(s): Zhou, K., Pan, J., Padmanabhan, S., Lim, R.W., Lim, L.W.

Revision History  

• Version 1.0: 2008-01-22
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2024-10-16
  Changes: Data collection, Database references, Derived calculations, Structure summary