One-Pot Two-Step Metabolic Labeling of Teichoic Acids and Direct Labeling of Peptidoglycan Reveals Tight Coordination of Both Polymers Inserted into Pneumococcus Cell Wall - Groupe Pneumocoque / Pneumococcus Group (IBS-PG) Accéder directement au contenu
Article Dans Une Revue ACS Chemical Biology Année : 2018

One-Pot Two-Step Metabolic Labeling of Teichoic Acids and Direct Labeling of Peptidoglycan Reveals Tight Coordination of Both Polymers Inserted into Pneumococcus Cell Wall

Julie Bonnet
Yung-Sing Wong
André Zapun
Claire Durmort

Résumé

A method for labeling teichoic acids in the human pathogen Streptococcus pneumoniae has been developed using a one-pot two-step metabolic labeling approach. The essential nutriment choline modified with an azido-group was incorporated and exposed at the cell surface more rapidly than it reacted with the strain promoted azide alkyne cycloaddition (SPAAC) partner also present in the medium. Once at the cell surface on teichoic acids, coupling of the azido group could then occur within 5 min by the bio-orthogonal click reaction with a DIBO-linked fluorophore. This fast and easy method allowed pulse-chase experiments and was combined with another fluorescent labeling approach to compare the insertion of teichoic acids with peptidoglycan synthesis with unprecedented temporal resolution. It has revealed that teichoic acid and peptidoglycan processes are largely concomitant, but teichoic acid insertion persists later at the division site.

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Bactériologie
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Dates et versions

hal-01861375 , version 1 (24-08-2018)

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Citer

Julie Bonnet, Yung-Sing Wong, Thierry Vernet, Anne-Marie Di Guilmi, André Zapun, et al.. One-Pot Two-Step Metabolic Labeling of Teichoic Acids and Direct Labeling of Peptidoglycan Reveals Tight Coordination of Both Polymers Inserted into Pneumococcus Cell Wall. ACS Chemical Biology, 2018, 13 (8), pp.2010-2015. ⟨10.1021/acschembio.8b00559⟩. ⟨hal-01861375⟩
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