4PIF

Crystal Structure of recombinant WT Banana Lectin


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.197 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.167 

wwPDB Validation   3D Report Full Report


This is version 1.1 of the entry. See complete history


Literature

Engineering a Therapeutic Lectin by Uncoupling Mitogenicity from Antiviral Activity.

Swanson, M.D.Boudreaux, D.M.Salmon, L.Chugh, J.Winter, H.C.Meagher, J.L.Andre, S.Murphy, P.V.Oscarson, S.Roy, R.King, S.Kaplan, M.H.Goldstein, I.J.Tarbet, E.B.Hurst, B.L.Smee, D.F.de la Fuente, C.Hoffmann, H.H.Xue, Y.Rice, C.M.Schols, D.Garcia, J.V.Stuckey, J.A.Gabius, H.J.Al-Hashimi, H.M.Markovitz, D.M.

(2015) Cell 163: 746-758

  • DOI: 10.1016/j.cell.2015.09.056
  • Primary Citation of Related Structures:  
    4PIF, 4PIK, 4PIT, 4PIU

  • PubMed Abstract: 
  • A key effector route of the Sugar Code involves lectins that exert crucial regulatory controls by targeting distinct cellular glycans. We demonstrate that a single amino-acid substitution in a banana lectin, replacing histidine 84 with a threonine, significantly reduces its mitogenicity, while preserving its broad-spectrum antiviral potency ...

    A key effector route of the Sugar Code involves lectins that exert crucial regulatory controls by targeting distinct cellular glycans. We demonstrate that a single amino-acid substitution in a banana lectin, replacing histidine 84 with a threonine, significantly reduces its mitogenicity, while preserving its broad-spectrum antiviral potency. X-ray crystallography, NMR spectroscopy, and glycocluster assays reveal that loss of mitogenicity is strongly correlated with loss of pi-pi stacking between aromatic amino acids H84 and Y83, which removes a wall separating two carbohydrate binding sites, thus diminishing multivalent interactions. On the other hand, monovalent interactions and antiviral activity are preserved by retaining other wild-type conformational features and possibly through unique contacts involving the T84 side chain. Through such fine-tuning, target selection and downstream effects of a lectin can be modulated so as to knock down one activity, while preserving another, thus providing tools for therapeutics and for understanding the Sugar Code.


    Organizational Affiliation

    Division of Infectious Diseases, Department of Internal Medicine, Program in Immunology, University of Michigan, Ann Arbor, MI 48109, USA. Electronic address: dmarkov@umich.edu.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
Ripening-associated proteinA, B, C, D149Musa acuminataMutation(s): 0 
UniProt
Find proteins for O22321 (Musa acuminata)
Explore O22321 
Go to UniProtKB:  O22321
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupO22321
Protein Feature View
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  • Reference Sequence
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.197 
  • R-Value Work: 0.165 
  • R-Value Observed: 0.167 
  • Space Group: P 1 21 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 50.51α = 90
b = 94.492β = 97.47
c = 63.443γ = 90
Software Package:
Software NamePurpose
HKL-2000data reduction
BUSTER-TNTrefinement
PDB_EXTRACTdata extraction
PHASERphasing
DENZOdata reduction
SCALEPACKdata scaling
BUSTERrefinement

Structure Validation

View Full Validation Report




Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2015-11-04
    Type: Initial release
  • Version 1.1: 2017-11-22
    Changes: Derived calculations, Refinement description