Reprioritization of biofilm metabolism is associated with nutrient adaptation and long-term survival of Haemophilus influenzae.

Journal Article (Journal Article)

Nontypeable Haemophilus influenzae (NTHI) is a human-restricted pathogen with an essential requirement for heme-iron acquisition. We previously demonstrated that microevolution of NTHI promotes stationary phase survival in response to transient heme-iron restriction. In this study, we examine the metabolic contributions to biofilm formation using this evolved NTHI strain, RM33. Quantitative analyses identified 29 proteins, 55 transcripts, and 31 metabolites that significantly changed within in vitro biofilms formed by RM33. The synthesis of all enzymes within the tryptophan and glycogen pathways was significantly increased in biofilms formed by RM33 compared with the parental strain. In addition, increases were observed in metabolite transport, adhesin production, and DNA metabolism. Furthermore, we observed pyruvate as a pivotal point in the metabolic pathways associated with changes in cAMP phosphodiesterase activity during biofilm formation. Taken together, changes in central metabolism combined with increased stores of nutrients may serve to counterbalance nutrient sequestration.

Full Text

Duke Authors

Cited Authors

  • Harrison, A; Hardison, RL; Wallace, RM; Fitch, J; Heimlich, DR; Bryan, MO; Dubois, L; John-Williams, LS; Sebra, RP; White, P; Moseley, MA; Thompson, JW; Justice, SS; Mason, KM

Published Date

  • 2019

Published In

Volume / Issue

  • 5 / 1

Start / End Page

  • 33 -

PubMed ID

  • 31700653

Pubmed Central ID

  • PMC6831627

Electronic International Standard Serial Number (EISSN)

  • 2055-5008

Digital Object Identifier (DOI)

  • 10.1038/s41522-019-0105-6


  • eng

Conference Location

  • United States