2X45

Crystal Structure of Arg r 1 in complex with histamine

• PDB DOI: https://doi.org/10.2210/pdb2X45/pdb

• Classification: ALLERGEN
• Organism(s): Argas reflexus
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2010-01-28 Released: 2011-02-09 
• Deposition Author(s): Paesen, G.C., Siebold, C., Syme, N., Harlos, K., Graham, S.C., Hilger, C., Homans, S.W., Hentges, F., Stuart, D.I.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.40 Å
• R-Value Free: 0.183 
• R-Value Work: 0.130 
• R-Value Observed: 0.133 

Starting Model: experimental

Literature

Crystal Structure of the Allergen Arg R 1, a Histamine-Binding Lipocalin from a Soft Tick

Paesen, G.C., Siebold, C., Syme, N., Harlos, K., Graham, S.C., Hilger, C., Homans, S.W., Hentges, F., Stuart, D.I.

To be published.

Biological Assembly 1  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 1 generated by PISA (software)

Biological Assembly 2  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 2 generated by PISA (software)

Biological Assembly 3  

Global Symmetry: Asymmetric - C1 
Global Stoichiometry: Monomer - A1 

Biological assembly 3 generated by PISA (software)

Macromolecule Content

• Total Structure Weight: 47.56 kDa 
• Atom Count: 4,411 
• Modelled Residue Count: 432 
• Deposited Residue Count: 432 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
ALLERGEN ARG R 1	A, B, C	144	Argas reflexus	Mutation(s): 0
UniProt
Find proteins for Q5GQ85 (Argas reflexus) Explore Q5GQ85  Go to UniProtKB:  Q5GQ85

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HSM	D [auth A], E [auth A], F [auth A], G [auth B], H [auth B], I [auth B], J [auth C], K [auth C], L [auth C]	HISTAMINE C5 H9 N3 NTYJJOPFIAHURM-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.40 Å
• R-Value Free: 0.183 
• R-Value Work: 0.130 
• R-Value Observed: 0.133 
• Space Group: C 1 2 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 107.147	α = 90
b = 61.817	β = 105.14
c = 63.871	γ = 90

Software Package:

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

Structure Validation

Entry History 

Deposition Data

• Released Date: 2011-02-09 
Deposition Author(s): Paesen, G.C., Siebold, C., Syme, N., Harlos, K., Graham, S.C., Hilger, C., Homans, S.W., Hentges, F., Stuart, D.I.

Revision History  

• Version 1.0: 2011-02-09
  Type: Initial release
  
• Version 1.1: 2011-05-07
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2023-12-20
  Changes: Data collection, Database references, Derived calculations, Other, Refinement description
• Version 1.4: 2024-10-23
  Changes: Structure summary