Biological Assembly 1  

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: 51.25 kDa 
• Atom Count: 3,549 
• Modelled Residue Count: 452 
• Deposited Residue Count: 484 
• Unique protein chains: 1

 1JYS

Crystal Structure of E. coli MTA/AdoHcy Nucleosidase

• PDB DOI: 10.2210/pdb1JYS/pdb

• Classification: HYDROLASE
• Organism(s): Escherichia coli
• Expression System: Escherichia coli BL21
• Mutation(s): No 


• 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: 1.90 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 
• DOI: 10.1016/s0969-2126(01)00656-6
• Primary Citation of Related Structures:  
  1JYS


• 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

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

Small Molecules

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

Binding Affinity Annotations
ID	Source	Binding Affinity
ADE	PDBBind:  1JYS	Ki: 3.00e+5 (nM) from 1 assay(s)
	Binding MOAD:  1JYS	Ki: 3.00e+5 (nM) from 1 assay(s)

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.90 Å
• R-Value Free: 0.239 
• R-Value Work: 0.217 
• Space Group: P 2₁ 2₁ 2

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 51.08	α = 90
b = 133.03	β = 90
c = 70.85	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• 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
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance