1ZAY | pdb_00001zay

PURINE REPRESSOR-HYPOXANTHINE-MODIFIED-PURF-OPERATOR COMPLEX

• PDB DOI: https://doi.org/10.2210/pdb1ZAY/pdb
• NAKB: 1ZAY

• Classification: TRANSCRIPTION/DNA
• Organism(s): Escherichia coli
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 1998-12-16 Released: 1999-12-16 
• Deposition Author(s): Zheleznova, E.E., Brennan, R.G.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Work: 
  0.180 (Depositor) 

Starting Model: experimental

Literature

The Roles of Exocyclic Groups in the Central Base-Pair Step in Modulating the Affinity of PurR for its Operator

Zheleznova, E.E., Brennan, R.G.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Macromolecule Content 

• Total Structure Weight: 43.45 kDa 
• Atom Count: 3,034 
• Modeled Residue Count: 355 
• Deposited Residue Count: 357 
• Unique protein chains: 1
• Unique nucleic acid chains: 1

Macromolecules

Entity ID: 2
Molecule	Chains	Sequence Length	Organism	Details	Image
PROTEIN (PURINE REPRESSOR)	B [auth A]	340	Escherichia coli	Mutation(s): 0
UniProt
Find proteins for P0ACP7 (Escherichia coli (strain K12)) Explore P0ACP7  Go to UniProtKB:  P0ACP7

Entity ID: 1
Molecule	Chains	Length	Organism	Image
DNA (5'-D(*AP*AP*CP*GP*AP*AP*AP*AP*TP*(1AP)P*TP*TP*TP*TP*CP*GP*T)-3')	A [auth M]	17	N/A

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HPA	C [auth A]	HYPOXANTHINE C5 H4 N4 O FDGQSTZJBFJUBT-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.70 Å
• R-Value Work:  0.180 (Depositor) 

Space Group: C 2 2 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 176.449	α = 90
b = 95.187	β = 90
c = 81.777	γ = 90

Software Package:

Software Name	Purpose
TNT	refinement
bioteX	data reduction
bioteX	data scaling
TNT	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 1999-12-16 
Deposition Author(s): Zheleznova, E.E., Brennan, R.G.

Revision History  

• Version 1.0: 1999-12-16
  Type: Initial release
  
• Version 1.1: 2008-04-27
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2017-10-04
  Changes: Refinement description
• Version 1.4: 2023-08-23
  Changes: Data collection, Database references, Derived calculations, Refinement description