5AJC

X-ray structure of RSL lectin in complex with sialyl lewis X tetrasaccharide


Experimental Data Snapshot

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.151 
  • R-Value Observed: 0.153 

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Ligand Structure Quality Assessment 


This is version 2.0 of the entry. See complete history


Literature

The Hidden Conformation of Lewis X, a Human Histo-Blood Group Antigen, is a Determinant for Recognition by Pathogen Lectins

Topin, J.Lelimousin, M.Arnaud, J.Audfray, A.Perez, S.Varrot, A.Imberty, A.

(2016) ACS Chem Biol 11: 2011

  • DOI: 10.1021/acschembio.6b00333
  • Primary Citation of Related Structures:  
    5AJB, 5AJC

  • PubMed Abstract: 
  • Histo-blood group epitopes are fucosylated branched oligosaccharides with well-defined conformations in solution that are recognized by receptors, such as lectins from pathogens. We report here the results of a series of experimental and computational endeavors revealing the unusual distortion of histo-blood group antigens by bacterial and fungal lectins ...

    Histo-blood group epitopes are fucosylated branched oligosaccharides with well-defined conformations in solution that are recognized by receptors, such as lectins from pathogens. We report here the results of a series of experimental and computational endeavors revealing the unusual distortion of histo-blood group antigens by bacterial and fungal lectins. The Lewis x trisaccharide adopts a rigid closed conformation in solution, while crystallography and molecular dynamics reveal several higher energy open conformations when bound to the Ralstonia solanacearum lectin, which is in agreement with thermodynamic and kinetic measurements. Extensive molecular dynamics simulations confirm rare transient Le(x) openings in solution, frequently assisted by distortion of the central N-acetyl-glucosamine ring. Additional directed molecular dynamic trajectories revealed the role of a conserved tryptophan residue in guiding the fucose into the binding site. Our findings show that conformational adaptation of oligosaccharides is of paramount importance in cell recognition and should be considered when designing anti-infective glyco-compounds.


    Organizational Affiliation

    CERMAV UPR5301, CNRS, and Université Grenoble Alpes , BP 53, 38041 Grenoble cedex 9, France.



Macromolecules
Find similar proteins by:  (by identity cutoff)  |  Structure
Entity ID: 1
MoleculeChainsSequence LengthOrganismDetailsImage
PUTATIVE FUCOSE-BINDING LECTIN PROTEINA, B, C90Ralstonia solanacearumMutation(s): 0 
Gene Names: E7Z57_08365RSP795_21825RSP822_19650RUN39_v1_50103
UniProt
Find proteins for A0A0S4TLR1 (Ralstonia solanacearum)
Explore A0A0S4TLR1 
Go to UniProtKB:  A0A0S4TLR1
Protein Feature View
Expand
  • Reference Sequence
Oligosaccharides

Help

Entity ID: 2
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
alpha-L-fucopyranose-(1-3)-[beta-D-galactopyranose-(1-4)]2-acetamido-2-deoxy-alpha-D-glucopyranoseD3N/A Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G51591NI
GlyCosmos:  G51591NI
GlyGen:  G51591NI
Entity ID: 3
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
alpha-L-fucopyranose-(1-3)-2-acetamido-2-deoxy-beta-D-glucopyranoseE2N/A Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G80587NA
GlyCosmos:  G80587NA
GlyGen:  G80587NA
Entity ID: 4
MoleculeChainsChain Length2D DiagramGlycosylation3D Interactions
N-acetyl-alpha-neuraminic acid-(2-3)-beta-D-galactopyranose-(1-4)-[alpha-L-fucopyranose-(1-3)]2-acetamido-2-deoxy-alpha-D-glucopyranoseF4N/A Oligosaccharides Interaction
Glycosylation Resources
GlyTouCan:  G07675NG
GlyCosmos:  G07675NG
GlyGen:  G07675NG
Small Molecules
Ligands 3 Unique
IDChainsName / Formula / InChI Key2D Diagram3D Interactions
FUC (Subject of Investigation/LOI)
Query on FUC

Download Ideal Coordinates CCD File 
I [auth B], K [auth C]alpha-L-fucopyranose
C6 H12 O5
SHZGCJCMOBCMKK-SXUWKVJYSA-N
 Ligand Interaction
FUL (Subject of Investigation/LOI)
Query on FUL

Download Ideal Coordinates CCD File 
H [auth A], J [auth B], L [auth C]beta-L-fucopyranose
C6 H12 O5
SHZGCJCMOBCMKK-KGJVWPDLSA-N
 Ligand Interaction
TRS
Query on TRS

Download Ideal Coordinates CCD File 
G [auth A]2-AMINO-2-HYDROXYMETHYL-PROPANE-1,3-DIOL
C4 H12 N O3
LENZDBCJOHFCAS-UHFFFAOYSA-O
 Ligand Interaction
Biologically Interesting Molecules (External Reference) 2 Unique
Experimental Data & Validation

Experimental Data

  • Method: X-RAY DIFFRACTION
  • Resolution: 1.70 Å
  • R-Value Free: 0.187 
  • R-Value Work: 0.151 
  • R-Value Observed: 0.153 
  • Space Group: P 21 21 21
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 36.766α = 90
b = 83.163β = 90
c = 90.697γ = 90
Software Package:
Software NamePurpose
REFMACrefinement
XDSdata reduction
Aimlessdata scaling
PHASERphasing

Structure Validation

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Ligand Structure Quality Assessment  



Entry History 

Deposition Data

Revision History  (Full details and data files)

  • Version 1.0: 2016-03-02
    Type: Initial release
  • Version 1.1: 2016-06-01
    Changes: Database references
  • Version 1.2: 2016-07-27
    Changes: Database references
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Atomic model, Data collection, Derived calculations, Other, Structure summary