Biological Assembly 1  

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

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

Macromolecule Content

• Total Structure Weight: 17984.28 
• Atom Count: 1247 
• Residue Count: 153 
• Unique protein chains: 1

3RGK

Crystal Structure of Human Myoglobin Mutant K45R

• DOI: 10.2210/pdb3RGK/pdb
• Entry 3RGK supersedes 2MM1

• Classification: OXYGEN TRANSPORT
• Organism(s): Homo sapiens
• Expression System: Escherichia coli
• Mutation(s): 2 


• Deposited: 2011-04-08 Released: 2011-04-27 
• Deposition Author(s): Hubbard, S.R.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 1.65 Å
• R-Value Free: 0.198 
• R-Value Work: 0.175 

Literature

X-ray crystal structure of a recombinant human myoglobin mutant at 2.8 A resolution

Hubbard, S.R., Lambright, S.G., Boxer, S.G., Hendrickson, W.A.

(1990) J.Mol.Biol. 20: 215-218

• PubMed: 2342104 
• DOI: 10.1016/S0022-2836(05)80181-0
• Primary Citation of Related Structures:  
  2MM1


• PubMed Abstract: 
  

We have grown crystals in trigonal space group P3(2)21 of a mutant human myoglobin, aquomet form, in which lysine at position 45 has been replaced by arginine and cysteine at position 110 has been replaced by alanine. Suitable crystals of native recombinant human myoglobin have not been obtained. We have used the molecular replacement method to determine the X-ray crystal structure of the mutant at 2.8 A resolution. At the present stage of refinement, the crystallographic R-value for the model, with tightly restrained stereochemistry, is 0.158 for 5.0 to 2.8 A data. As expected, the overall structure is quite similar to the sperm whale myoglobin structure. Arginine 45 adopts a well-ordered conformation similar to that found in aquomet sperm whale myoglobin.

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Organizational Affiliation: 

Howard Hughes Medical Institute, Department of Biochemistry and Molecular Biophysics, Columbia University, New York, NY 10032.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
Myoglobin	A	153	Homo sapiens	Mutation(s): 2  Gene Names: MB
Find proteins for P02144 (Homo sapiens) Go to Gene View: MB Go to UniProtKB:  P02144

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
SO4	A	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
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: 1.65 Å
• R-Value Free: 0.198 
• R-Value Work: 0.175 
• Space Group: P 3₂ 2 1

Unit Cell:

Length (Å)	Angle (°)
a = 86.200	α = 90.00
b = 86.200	β = 90.00
c = 35.660	γ = 120.00

Software Package:

Software Name	Purpose
REFMAC	refinement

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 2011-04-08 
• Released Date: 2011-04-27 
• Deposition Author(s): Hubbard, S.R.
• This entry supersedes: 2MM1

Revision History 

• Version 1.0: 2011-04-27
  Type: Initial release
• Version 1.1: 2011-07-13
  Type: Version format compliance