Biological Assembly 1  

 3D View: Structure | Ligand Interaction

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

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

Macromolecule Content

• Total Structure Weight: 17923.51 
• Atom Count: 1266 
• Residue Count: 153 
• Unique protein chains: 1

2BLH

Ligand Migration and Protein Fluctuations in Myoglobin Mutant L29W

• DOI: 10.2210/pdb2BLH/pdb

• Classification: OXYGEN TRANSPORT
• Organism(s): Physeter macrocephalus
• Expression System: Escherichia coli
• Mutation(s): 1 


• Deposited: 2005-03-04 Released: 2005-04-06 
• Deposition Author(s): Nienhaus, K., Ostermann, A., Nienhaus, G.U., Parak, F.G., Schmidt, M.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.77 Å
• R-Value Free: 0.202 
• R-Value Work: 0.186 

Literature

Ligand Migration and Protein Fluctuations in Myoglobin Mutant L29W

Nienhaus, K., Ostermann, A., Nienhaus, G.U., Parak, F.G., Schmidt, M.

(2005) Biochemistry 44: 5095

• PubMed: 15794647 
• DOI: 10.1021/bi047513t
• Primary Citation of Related Structures:  
  2BLJ, 2BLI


• PubMed Abstract: 
  

We have determined eight X-ray structures of myoglobin mutant L29W at various experimental conditions. In addition, infrared spectroscopic experiments are presented, which are discussed in the light of the X-ray structures. Two distinct conformations of the CO-ligated protein were identified, giving rise to two stretching bands of heme-bound CO. If L29W MbCO crystals are illuminated around 180 K, a deoxy species is formed. The CO molecules migrate to the proximal side of the heme and remain trapped in the so-called Xe1 cavity upon temperature decrease to 105 K. The structure of this photoproduct is almost identical to the equilibrium high-temperature deoxy Mb structure. If the temperature is cycled to increasingly higher values, CO recombination is observed. Three intermediate structures have been determined during the rebinding process. Efficient recombination occurs only above 180 K, the characteristic temperature for the onset of protein dynamics. Rebinding is remarkably slow because bulky residues His64 and Trp29 block important migration pathways of the CO molecule.

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Organizational Affiliation: 

Department of Biophysics, University of Ulm, Albert-Einstein-Allee 11, 89081 Ulm, Germany.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
MYOGLOBIN	A	153	Physeter macrocephalus	Mutation(s): 1  Gene Names: MB
Find proteins for P02185 (Physeter macrocephalus) Go to Gene View: MB Go to UniProtKB:  P02185

Small Molecules

Ligands 1 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
HEM	A	PROTOPORPHYRIN IX CONTAINING FE HEME C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 1.77 Å
• R-Value Free: 0.202 
• R-Value Work: 0.186 
• Space Group: P 6

Unit Cell:

Length (Å)	Angle (°)
a = 92.420	α = 90.00
b = 92.420	β = 90.00
c = 46.790	γ = 120.00

Software Package:

Software Name	Purpose
SAINT	data scaling
CNS	refinement
SAINT	data reduction

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2005-03-04 
• Released Date: 2005-04-06 
• Deposition Author(s): Nienhaus, K., Ostermann, A., Nienhaus, G.U., Parak, F.G., Schmidt, M.

Revision History 

• Version 1.0: 2005-04-06
  Type: Initial release
• Version 1.1: 2014-12-10
  Type: Data collection, Derived calculations, Non-polymer description, Other, Refinement description, Structure summary, Version format compliance
• Version 1.2: 2017-06-28
  Type: Data collection