1FSL

FERRIC SOYBEAN LEGHEMOGLOBIN COMPLEXED WITH NICOTINATE


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Work: 0.158 

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This is version 1.5 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 D Biol Crystallogr 53: 302-310

  • DOI: https://doi.org/10.1107/S0907444997000292
  • Primary Citation of Related Structures:  
    1FSL

  • 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.


  • Organizational Affiliation

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


Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
LEGHEMOGLOBIN A
A, B
143Glycine maxMutation(s): 0 
UniProt
Find proteins for P02238 (Glycine max)
Explore P02238 
Go to UniProtKB:  P02238
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupP02238
Sequence Annotations
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 2.30 Å
  • R-Value Work: 0.158 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 52.69α = 90
b = 56.55β = 109.9
c = 57.8γ = 90
Software Package:
Software NamePurpose
PROFFTrefinement
ENRAF-NONIUSdata reduction
PROTEINdata scaling

Structure Validation

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Ligand Structure Quality Assessment 


Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 1996-06-26
    Type: Initial release
  • Version 1.1: 2008-03-24
    Changes: Version format compliance
  • Version 1.2: 2011-07-13
    Changes: Version format compliance
  • Version 1.3: 2018-04-04
    Changes: Data collection, Other
  • Version 1.4: 2018-04-18
    Changes: Data collection
  • Version 1.5: 2024-02-07
    Changes: Data collection, Database references, Derived calculations