1FSL

FERRIC SOYBEAN LEGHEMOGLOBIN COMPLEXED WITH NICOTINATE


Experimental Data Snapshot

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

wwPDB Validation 3D Report Full Report


This is version 1.4 of the entry. See complete history

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

  • 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 ...

    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.


    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


    Organizational Affiliation

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




Macromolecules

Find similar proteins by: Sequence  |  Structure

Entity ID: 1
MoleculeChainsSequence LengthOrganismDetails
LEGHEMOGLOBIN A
A, B
143Glycine maxMutation(s): 0 
Gene Names: LBA
Find proteins for P02238 (Glycine max)
Go to UniProtKB:  P02238
Small Molecules
Ligands 2 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
NIO
Query on NIO

Download SDF File 
Download CCD File 
A, B
NICOTINIC ACID
C6 H5 N O2
PVNIIMVLHYAWGP-UHFFFAOYSA-N
 Ligand Interaction
HEM
Query on HEM

Download SDF File 
Download CCD File 
A, B
PROTOPORPHYRIN IX CONTAINING FE
HEME
C34 H32 Fe N4 O4
KABFMIBPWCXCRK-RGGAHWMASA-L
 Ligand Interaction
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 = 52.690α = 90.00
b = 56.550β = 109.90
c = 57.800γ = 90.00
Software Package:
Software NamePurpose
ENRAF-NONIUSdata reduction
PROFFTrefinement
PROTEINdata scaling

Structure Validation

View Full Validation Report or Ramachandran Plots



Entry History 

Deposition Data

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