Biological Assembly 1  

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Global Symmetry: Cyclic - C2  (3D View)
Global Stoichiometry: Homo 2-mer - A2 

Biological assembly 1 assigned by authors and generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 51246.50 
• Atom Count: 3334 
• Residue Count: 484 
• Unique protein chains: 1

1JYS

Crystal Structure of E. coli MTA/AdoHcy Nucleosidase

• DOI: 10.2210/pdb1JYS/pdb

• Classification: HYDROLASE
• Organism(s): Escherichia coli (strain K12)
• Expression System: Escherichia coli BL21


• Deposited: 2001-09-13 Released: 2002-10-01 
• Deposition Author(s): Lee, J.E., Cornell, K.A., Riscoe, M.K., Howell, P.L.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.9 Å
• R-Value Free: 0.239 
• R-Value Work: 0.217 

Literature

Structure of E. coli 5'-methylthioadenosine/S-adenosylhomocysteine nucleosidase reveals similarity to the purine nucleoside phosphorylases.

Lee, J.E., Cornell, K.A., Riscoe, M.K., Howell, P.L.

(2001) Structure 9: 941-953

• PubMed: 11591349 


• PubMed Abstract: 
  

5'-methylthioadenosine/S-adenosyl-homocysteine (MTA/AdoHcy) nucleosidase catalyzes the irreversible cleavage of 5'-methylthioadenosine and S-adenosylhomocysteine to adenine and the corresponding thioribose, 5'-methylthioribose and S-ribosylhomocysteine, respectively. While this enzyme is crucial for the metabolism of AdoHcy and MTA nucleosides in many prokaryotic and lower eukaryotic organisms, it is absent in mammalian cells. This metabolic difference represents an exploitable target for rational drug design.

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Organizational Affiliation: 

Structural Biology and Biochemistry, Research Institute, Hospital for Sick Children, 555 University Avenue, Toronto, Ontario M5G 1X8, Canada.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
MTA/SAH nucleosidase	A, B	242	Escherichia coli (strain K12)	Mutation(s): 0  Gene Names: mtnN (mtn, pfs, yadA) EC: 3.2.2.9
Find proteins for P0AF12 (Escherichia coli (strain K12)) Go to UniProtKB:  P0AF12

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
ADE	A, B	ADENINE C5 H5 N5 GFFGJBXGBJISGV-UHFFFAOYSA-N

External Ligand Annotations
ID	Binding Affinity (Sequence Identity %)
ADE	Ki: 300000 nM BINDINGMOAD
ADE	Ki: 300000 nM PDBBIND

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.9 Å
• R-Value Free: 0.239 
• R-Value Work: 0.217 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length (Å)	Angle (°)
a = 51.080	α = 90.00
b = 133.030	β = 90.00
c = 70.850	γ = 90.00

Software Package:

Software Name	Purpose
DENZO	data reduction
SCALEPACK	data scaling
CNS	phasing
CNS	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2001-09-13 
• Released Date: 2002-10-01 
• Deposition Author(s): Lee, J.E., Cornell, K.A., Riscoe, M.K., Howell, P.L.

Revision History 

• Version 1.0: 2002-10-01
  Type: Initial release
• Version 1.1: 2008-04-27
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance