Plla lectin, trisaccharide complex

Experimental Data Snapshot

  • Resolution: 1.75 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.177 

Starting Model: experimental
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This is version 2.1 of the entry. See complete history


Photorhabdus luminescens lectin A (PllA): A new probe for detecting alpha-galactoside-terminating glycoconjugates.

Beshr, G.Sikandar, A.Jemiller, E.M.Klymiuk, N.Hauck, D.Wagner, S.Wolf, E.Koehnke, J.Titz, A.

(2017) J Biol Chem 292: 19935-19951

  • DOI: https://doi.org/10.1074/jbc.M117.812792
  • Primary Citation of Related Structures:  
    5ODU, 5OFI, 5OFX, 5OFZ

  • PubMed Abstract: 

    Lectins play important roles in infections by pathogenic bacteria, for example, in host colonization, persistence, and biofilm formation. The Gram-negative entomopathogenic bacterium Photorhabdus luminescens symbiotically lives in insect-infecting Heterorhabditis nematodes and kills the insect host upon invasion by the nematode. The P. luminescens genome harbors the gene plu2096 , coding for a novel lectin that we named PllA. We analyzed the binding properties of purified PllA with a glycan array and a binding assay in solution. Both assays revealed a strict specificity of PllA for α-galactoside-terminating glycoconjugates. The crystal structures of apo PllA and complexes with three different ligands revealed the molecular basis for the strict specificity of this lectin. Furthermore, we found that a 90° twist in subunit orientation leads to a peculiar quaternary structure compared with that of its ortholog LecA from Pseudomonas aeruginosa We also investigated the utility of PllA as a probe for detecting α-galactosides. The α-Gal epitope is present on wild-type pig cells and is the main reason for hyperacute organ rejection in pig to primate xenotransplantation. We noted that PllA specifically recognizes this epitope on the glycan array and demonstrated that PllA can be used as a fluorescent probe to detect this epitope on primary porcine cells in vitro In summary, our biochemical and structural analyses of the P. luminescens lectin PllA have disclosed the structural basis for PllA's high specificity for α-galactoside-containing ligands, and we show that PllA can be used to visualize the α-Gal epitope on porcine tissues.

  • Organizational Affiliation

    From the Divisions of Chemical Biology of Carbohydrates and.

Find similar proteins by:  (by identity cutoff)  |  3D Structure
Entity ID: 1
MoleculeChains Sequence LengthOrganismDetailsImage
A, B, C, D, E
A, B, C, D, E, F, G, H
122Photorhabdus laumondii subsp. laumondii TTO1Mutation(s): 0 
Gene Names: plu2096
Find proteins for Q7N561 (Photorhabdus laumondii subsp. laumondii (strain DSM 15139 / CIP 105565 / TT01))
Explore Q7N561 
Go to UniProtKB:  Q7N561
Entity Groups  
Sequence Clusters30% Identity50% Identity70% Identity90% Identity95% Identity100% Identity
UniProt GroupQ7N561
Sequence Annotations
  • Reference Sequence


Entity ID: 2
MoleculeChains Length2D Diagram Glycosylation3D Interactions
I, J, K, L, M
I, J, K, L, M, N, O
Glycosylation Resources
GlyTouCan:  G40178VU
GlyCosmos:  G40178VU
Experimental Data & Validation

Experimental Data

  • Resolution: 1.75 Å
  • R-Value Free: 0.206 
  • R-Value Work: 0.175 
  • R-Value Observed: 0.177 
  • Space Group: P 1
Unit Cell:
Length ( Å )Angle ( ˚ )
a = 58.979α = 101.15
b = 62.998β = 112.79
c = 75.86γ = 94.44
Software Package:
Software NamePurpose
XDSdata reduction
SCALAdata scaling

Structure Validation

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Entry History & Funding Information

Deposition Data

Funding OrganizationLocationGrant Number
German Research FoundationGermanyKO4116/31

Revision History  (Full details and data files)

  • Version 1.0: 2017-10-04
    Type: Initial release
  • Version 1.1: 2017-10-11
    Changes: Database references
  • Version 1.2: 2017-12-13
    Changes: Database references, Structure summary
  • Version 2.0: 2020-07-29
    Type: Remediation
    Reason: Carbohydrate remediation
    Changes: Advisory, Atomic model, Author supporting evidence, Data collection, Derived calculations, Non-polymer description, Structure summary
  • Version 2.1: 2024-01-17
    Changes: Data collection, Database references, Refinement description, Structure summary