1HKQ

PPS10 plasmid DNA replication initiator protein RepA. Replication inactive, dimeric N-terminal domain.

• PDB DOI: https://doi.org/10.2210/pdb1HKQ/pdb

• Classification: DNA BINDING PROTEIN
• Organism(s): Pseudomonas savastanoi
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2003-03-11 Released: 2003-05-29 
• Deposition Author(s): Giraldo, R., Fernandez-Tornero, C., Evans, P.R., Diaz-Orejas, R., Romero, A.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.75 Å
• R-Value Free: 0.272 
• R-Value Work: 0.238 
• R-Value Observed: 0.238 

Literature

A Conformational Switch between Transcriptional Repression and Replication Initiation in Repa Dimerization Domain

Giraldo, R., Fernandez-Tornero, C., Evans, P.R., Diaz-Orejas, R., Romero, A.

(2003) Nat Struct Biol 10: 496

• PubMed: 12825085 
• DOI: https://doi.org/10.1038/nsb0703-496
• Primary Citation of Related Structures:  
  1HKQ

Biological Assembly 1  

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

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

Macromolecule Content

• Total Structure Weight: 32.31 kDa 
• Atom Count: 2,087 
• Modelled Residue Count: 250 
• Deposited Residue Count: 264 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
REPLICATION PROTEIN	A, B	132	Pseudomonas savastanoi	Mutation(s): 0
UniProt
Find proteins for Q52546 (Pseudomonas syringae) Explore Q52546  Go to UniProtKB:  Q52546

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HG	C [auth A], E [auth A], F [auth A], G [auth A], I [auth B], K [auth B], L [auth B], M [auth B]	MERCURY (II) ION Hg BQPIGGFYSBELGY-UHFFFAOYSA-N
BEZ	D [auth A], J [auth B]	BENZOIC ACID C7 H6 O2 WPYMKLBDIGXBTP-UHFFFAOYSA-N
PO4	H [auth A]	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.75 Å
• R-Value Free: 0.272 
• R-Value Work: 0.238 
• R-Value Observed: 0.238 
• Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 51.866	α = 90
b = 55.533	β = 90
c = 96.073	γ = 90

Software Package:

Software Name	Purpose
MOSFLM	data reduction
SCALA	data scaling
CNS	phasing
SHARP	phasing
CNS	refinement

Structure Validation

Entry History 

Deposition Data

• Released Date: 2003-05-29 
Deposition Author(s): Giraldo, R., Fernandez-Tornero, C., Evans, P.R., Diaz-Orejas, R., Romero, A.

Revision History  

• Version 1.0: 2003-05-29
  Type: Initial release
  
• Version 1.1: 2011-05-08
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2019-02-27
  Changes: Data collection, Experimental preparation, Other
• Version 1.4: 2019-04-10
  Changes: Data collection, Source and taxonomy
• Version 1.5: 2019-07-24
  Changes: Data collection