1U18

1.96 A Crystal structure of H60C mutant of nitrophorin complexed with histamine

• PDB DOI: https://doi.org/10.2210/pdb1U18/pdb

• Classification: SIGNALING PROTEIN
• Organism(s): Rhodnius prolixus
• Expression System: Escherichia coli BL21(DE3)
• Mutation(s): No 


• Deposited: 2004-07-15 Released: 2005-07-26 
• Deposition Author(s): Vetter, S.W., Goodin, D.B.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.96 Å
• R-Value Free: 0.226 
• R-Value Work: 0.185 
• R-Value Observed: 0.187 

Starting Model: experimental

Literature

1.96 A Crystal structure of H60C mutant of nitrophorin complexed with histamine

Vetter, S.W., Goodin, D.B.

To be published.

Biological Assembly 1  

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

Biological assembly 1 assigned by authors.

Biological Assembly 2  

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

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 42.86 kDa 
• Atom Count: 3,200 
• Modelled Residue Count: 368 
• Deposited Residue Count: 370 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Nitrophorin 1	A, B	185	Rhodnius prolixus	Mutation(s): 0
UniProt
Find proteins for Q26239 (Rhodnius prolixus) Explore Q26239  Go to UniProtKB:  Q26239

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HEM	D [auth A], G [auth B]	PROTOPORPHYRIN IX CONTAINING FE C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L
HSM	E [auth A], H [auth B]	HISTAMINE C5 H9 N3 NTYJJOPFIAHURM-UHFFFAOYSA-N
PO4	C [auth A], F [auth B]	PHOSPHATE ION O4 P NBIIXXVUZAFLBC-UHFFFAOYSA-K

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.96 Å
• R-Value Free: 0.226 
• R-Value Work: 0.185 
• R-Value Observed: 0.187 
• Space Group: P 1 2₁ 1

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 38.82	α = 90
b = 73.85	β = 98.57
c = 65.38	γ = 90

Software Package:

Software Name	Purpose
REFMAC	refinement
CrystalClear	data reduction
d*TREK	data scaling
CNS	phasing

Structure Validation

Entry History 

Deposition Data

• Released Date: 2005-07-26 
Deposition Author(s): Vetter, S.W., Goodin, D.B.

Revision History  

• Version 1.0: 2005-07-26
  Type: Initial release
  
• Version 1.1: 2008-04-30
  Changes: Version format compliance
• Version 1.2: 2011-07-13
  Changes: Version format compliance
• Version 1.3: 2023-08-23
  Changes: Data collection, Database references, Derived calculations, Refinement description
• Version 1.4: 2024-11-06
  Changes: Structure summary