2R50 | pdb_00002r50

The crystal structure of nonsymbiotic corn hemoglobin 1

• PDB DOI: https://doi.org/10.2210/pdb2R50/pdb

• Classification: METAL BINDING PROTEIN
• Organism(s): Zea mays subsp. parviglumis
• Expression System: Escherichia coli
• Mutation(s): No 


• Deposited: 2007-09-02 Released: 2007-09-18 
• Deposition Author(s): Smagghe, B.J., Hoy, J.A., Hargrove, M.S.

---

Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free: 
  0.253 (Depositor), 0.251 (DCC) 
• R-Value Work: 
  0.201 (Depositor), 0.204 (DCC) 
• R-Value Observed: 
  0.203 (Depositor) 

Starting Model: experimental

Literature

The crystal structure of nonsymbiotic corn hemoglobin 1

Smagghe, B.J., Hoy, J.A., Hargrove, M.S.

To be published.

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 PISA (software)

Biological Assembly 2  

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

Biological assembly 2 assigned by authors and generated by PISA (software)

Biological Assembly 3  

Global Symmetry: Dihedral - D2  (Explore in 3D)
Global Stoichiometry: Homo 4-mer - A4 

Biological assembly 3 generated by PISA (software)

Macromolecule Content 

• Total Structure Weight: 76.28 kDa 
• Atom Count: 5,368 
• Modeled Residue Count: 584 
• Deposited Residue Count: 660 
• Unique protein chains: 1

Macromolecules

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details	Image
Non-symbiotic hemoglobin	A, B, C, D	165	Zea mays subsp. parviglumis	Mutation(s): 0  Gene Names: HB, GLB1 EC: 1.7.2
UniProt
Find proteins for Q9M593 (Zea mays subsp. parviglumis) Explore Q9M593  Go to UniProtKB:  Q9M593

Small Molecules

Ligands 3 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram
HEM	E [auth A], G [auth B], K [auth C], N [auth D]	PROTOPORPHYRIN IX CONTAINING FE C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L
SO4	F [auth B], I [auth C], J [auth C], L [auth D], M [auth D]	SULFATE ION O4 S QAOWNCQODCNURD-UHFFFAOYSA-L
ACY	H [auth B], O [auth D]	ACETIC ACID C2 H4 O2 QTBSBXVTEAMEQO-UHFFFAOYSA-N

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.20 Å
• R-Value Free:  0.253 (Depositor), 0.251 (DCC) 
• R-Value Work:  0.201 (Depositor), 0.204 (DCC) 
• R-Value Observed: 0.203 (Depositor) 

Space Group: P 2₁ 2₁ 2₁

Unit Cell:

Length ( Å )	Angle ( ˚ )
a = 50.754	α = 90
b = 89.734	β = 90
c = 157.424	γ = 90

Software Package:

Software Name	Purpose
d*TREK	data scaling
AMoRE	phasing
REFMAC	refinement
PDB_EXTRACT	data extraction
CrystalClear	data collection
d*TREK	data reduction

Structure Validation

Entry History 

Deposition Data

• Released Date: 2007-09-18 
Deposition Author(s): Smagghe, B.J., Hoy, J.A., Hargrove, M.S.

Revision History  

• Version 1.0: 2007-09-18
  Type: Initial release
  
• Version 1.1: 2011-07-13
  Changes: Version format compliance
• Version 1.2: 2023-08-30
  Changes: Data collection, Database references, Derived calculations, Refinement description