| DOI | Trouver le DOI : https://doi.org/10.1371/journal.pone.0069888 |
|---|
| Auteur | Rechercher : Lindhout, T.1; Rechercher : Bainbridge, C.R.1; Rechercher : Costain, W.J.1; Rechercher : Gilbert, M.1; Rechercher : Wakarchuk, W.W. |
|---|
| Affiliation | - Conseil national de recherches du Canada. Thérapeutique en santé humaine
|
|---|
| Format | Texte, Article |
|---|
| Sujet | bacterial enzyme; glycan; glycoprotein; hybrid protein; maltose binding protein; polysialic acid; polysialyltransferase; recombinant enzyme; unclassified drug; binding site; carbohydrate analysis; cell migration; cell surface; comparative study; DNA sequence; enzyme activity; enzyme analysis; enzyme kinetics; enzyme stability; enzyme synthesis; Escherichia coli; Mannheimia haemolytica; Neisseria meningitidis; neuroprogenitor cell; nucleotide sequence; pH; protein expression; protein localization; protein modification; solubility; stem cell; suicide substrate; thermostability; wound healing |
|---|
| Résumé | Polysialic acids are bioactive carbohydrates found in eukaryotes and some bacterial pathogens. The bacterial polysialyltransferases (PSTs), which catalyze the synthesis of polysialic acid capsules, have previously been identified in select strains of Escherichia coli and Neisseria meningitidis and are classified in the Carbohydrate-Active enZYmes Database as glycosyltransferase family GT-38. In this study using DNA sequence analysis and functional characterization we have identified a novel polysialyltransferase from the bovine/ovine pathogen Mannheimia haemolytica A2 (PSTMh). The enzyme was expressed in recombinant form as a soluble maltose-binding-protein fusion in parallel with the related PSTs from E. coli K1 and N. meningitidis group B in order to perform a side-by-side comparison. Biochemical properties including solubility, acceptor preference, reaction pH optima, thermostability, kinetics, and product chain length for the enzymes were compared using a synthetic fluorescent acceptor molecule. PSTMh exhibited biochemical properties that make it an attractive candidate for chemi-enzymatic synthesis applications of polysialic acid. The activity of PSTMh was examined on a model glycoprotein and the surface of a neuroprogenitor cell line where the results supported its development for use in applications to therapeutic protein modification and cell surface glycan remodelling to enable cell migration at implantation sites to promote wound healing. The three PSTs examined here demonstrated different properties that would each be useful to therapeutic applications. © 2013 Lindhout et al. |
|---|
| Date de publication | 2013 |
|---|
| Dans | |
|---|
| Langue | anglais |
|---|
| Publications évaluées par des pairs | Oui |
|---|
| Numéro NPARC | 21269716 |
|---|
| Exporter la notice | Exporter en format RIS |
|---|
| Signaler une correction | Signaler une correction (s'ouvre dans un nouvel onglet) |
|---|
| Identificateur de l’enregistrement | 8e519624-1cfd-4675-bfa0-d3f56edf563d |
|---|
| Enregistrement créé | 2013-12-13 |
|---|
| Enregistrement modifié | 2022-11-18 |
|---|
