2.50
Hdl Handle:
http://hdl.handle.net/10033/621148
Title:
Photorhabdus luminescens lectin A (PllA) - a new probe for detecting α-galactoside-terminating glycoconjugates.
Authors:
Beshr, Ghamdan; Sikandar, Asfandyar; Jemiller, Eva-Maria; Klymiuk, Nikolai; Hauck, Dirk; Wagner, Stefanie; Wolf, Eckhard; Koehnke, Jesko; Titz, Alexander ( 0000-0001-7408-5084 )
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 alpha-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 degree 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 alpha-galactosides. The alpha-Gal epitope is present on wild-type pig cells and 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 PllAs high specificity for alpha-galactoside-containing ligands, and we show that PllA can be used to visualize alpha-Gal epitope on porcine tissues.
Affiliation:
Helmholtz-Institute for Pharmaceutical Research Saarland (HIPS), Universitycampus E8.1, 66123 Saarbrücken, Germany.
Citation:
Photorhabdus luminescens lectin A (PllA) - a new probe for detecting α-galactoside-terminating glycoconjugates. 2017 J. Biol. Chem.
Journal:
The Journal of biological chemistry
Issue Date:
28-Sep-2017
URI:
http://hdl.handle.net/10033/621148
DOI:
10.1074/jbc.M117.812792
PubMed ID:
28972138
Type:
Article
Language:
en
ISSN:
1083-351X
Appears in Collections:
publications of the junior research group chemical biology of carbohydrates ([HIPS]CBCH)

Full metadata record

DC FieldValue Language
dc.contributor.authorBeshr, Ghamdanen
dc.contributor.authorSikandar, Asfandyaren
dc.contributor.authorJemiller, Eva-Mariaen
dc.contributor.authorKlymiuk, Nikolaien
dc.contributor.authorHauck, Dirken
dc.contributor.authorWagner, Stefanieen
dc.contributor.authorWolf, Eckharden
dc.contributor.authorKoehnke, Jeskoen
dc.contributor.authorTitz, Alexanderen
dc.date.accessioned2017-11-01T10:37:09Z-
dc.date.available2017-11-01T10:37:09Z-
dc.date.issued2017-09-28-
dc.identifier.citationPhotorhabdus luminescens lectin A (PllA) - a new probe for detecting α-galactoside-terminating glycoconjugates. 2017 J. Biol. Chem.en
dc.identifier.issn1083-351X-
dc.identifier.pmid28972138-
dc.identifier.doi10.1074/jbc.M117.812792-
dc.identifier.urihttp://hdl.handle.net/10033/621148-
dc.description.abstractLectins 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 alpha-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 degree 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 alpha-galactosides. The alpha-Gal epitope is present on wild-type pig cells and 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 PllAs high specificity for alpha-galactoside-containing ligands, and we show that PllA can be used to visualize alpha-Gal epitope on porcine tissues.en
dc.language.isoenen
dc.rights.urihttp://creativecommons.org/licenses/by-nc-sa/4.0/*
dc.titlePhotorhabdus luminescens lectin A (PllA) - a new probe for detecting α-galactoside-terminating glycoconjugates.en
dc.typeArticleen
dc.contributor.departmentHelmholtz-Institute for Pharmaceutical Research Saarland (HIPS), Universitycampus E8.1, 66123 Saarbrücken, Germany.en
dc.identifier.journalThe Journal of biological chemistryen

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