Biological Assembly 1  

 3D View: Structure | Electron Density | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

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

Biological assembly 1 assigned by authors.

Biological Assembly 2  

 3D View: Structure | Electron Density | Ligand Interaction

Standalone Viewers  
Protein Workshop | Ligand Explorer

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

Biological assembly 2 assigned by authors.

Macromolecule Content

• Total Structure Weight: 31999.86 
• Atom Count: 2272 
• Residue Count: 286 
• Unique protein chains: 1

1FSL

FERRIC SOYBEAN LEGHEMOGLOBIN COMPLEXED WITH NICOTINATE

• DOI: 10.2210/pdb1FSL/pdb

• Classification: OXYGEN TRANSPORT
• Organism(s): Glycine max


• Deposited: 1995-12-12 Released: 1996-06-26 
• Deposition Author(s): Ellis, P.J., Guss, J.M., Freeman, H.C.

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Experimental Data Snapshot

• Method: X-RAY DIFFRACTION
• Resolution: 2.3 Å
• R-Value Work: 0.158 

Literature

Structure of ferric soybean leghemoglobin a nicotinate at 2.3 A resolution.

Ellis, P.J., Appleby, C.A., Guss, J.M., Hunter, W.N., Ollis, D.L., Freeman, H.C.

(1997) Acta Crystallogr.,Sect.D 53: 302-310

• PubMed: 15299933 
• DOI: 10.1107/S0907444997000292


• PubMed Abstract: 
  

Soybean leghemoglobin a is a small (16 kDa) protein facilitating the transport of O(2) to respiring N(2)-fixing bacteria at low free-O(2) tension. The crystal structure of soybean ferric leghemoglobin a nicotinate has been refined at 2.3 A resolution. The final R factor is 15.8% for 6877 reflections between 6.0 and 2.3 A. The structure of soybean leghemoglobin a (143 residues) is closely similar to that of lupin leghemoglobin II (153 residues), the proteins having 82 identical residues when the sequences are aligned. The new structure provides support for the conclusion that the unique properties of leghemoglobin arise principally from a heme pocket considerably larger and more flexible than that of myoglobin, a strongly ruffled heme group, and a proximal histidine orientation more favourable to ligand binding.

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Related Citations: 

• Crystal Structure of Soybean Ferric Leghaemoglobin a Nicotinate at a Resolution of 3.3 Angstrom
  Ollis, D.L.,Appleby, C.A.,Colman, P.M.,Cutten, A.E.,Guss, J.M.,Venkatappa, M.P.,Freeman, H.C.
  (1983) Aust.J.Chem. 36: 451




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Organizational Affiliation: 

School of Chemistry, University of Sydney, NSW, Australia.

Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
Molecule	Chains	Sequence Length	Organism	Details
LEGHEMOGLOBIN A	A, B	143	Glycine max	Mutation(s): 0  Gene Names: LBA
Find proteins for P02238 (Glycine max) Go to UniProtKB:  P02238

Small Molecules

Ligands 2 Unique
ID	Chains	Name / Formula / InChI Key	2D Diagram & Interactions
NIO	A, B	NICOTINIC ACID C6 H5 N O2 PVNIIMVLHYAWGP-UHFFFAOYSA-N
HEM	A, B	PROTOPORPHYRIN IX CONTAINING FE HEME C34 H32 Fe N4 O4 KABFMIBPWCXCRK-RGGAHWMASA-L

Experimental Data & Validation

Experimental Data

• Method: X-RAY DIFFRACTION
• Resolution: 2.3 Å
• R-Value Work: 0.158 
• Space Group: P 1 2₁ 1

Unit Cell:

Length (Å)	Angle (°)
a = 52.690	α = 90.00
b = 56.550	β = 109.90
c = 57.800	γ = 90.00

Software Package:

Software Name	Purpose
ENRAF-NONIUS	data reduction
PROFFT	refinement
PROTEIN	data scaling

Structure Validation

Entry History 

Deposition Data

• Deposited Date: 1995-12-12 
• Released Date: 1996-06-26 
• Deposition Author(s): Ellis, P.J., Guss, J.M., Freeman, H.C.

Revision History 

• Version 1.0: 1996-06-26
  Type: Initial release
• Version 1.1: 2008-03-24
  Type: Version format compliance
• Version 1.2: 2011-07-13
  Type: Version format compliance
• Version 1.3: 2018-04-04
  Type: Data collection, Other
• Version 1.4: 2018-04-18
  Type: Data collection