These tools will no longer be maintained as of December 31, 2024. Archived website can be found here. PubMed4Hh GitHub repository can be found here. Contact NLM Customer Service if you have questions.


Pubmed for Handhelds

PUBMED FOR HANDHELDS

Search MEDLINE/PubMed

  • Title: A simple semi-quantitative in vivo method using H₂S detection to monitor sulfide metabolizing enzymes.
    Author: Zhang Y, Weiner JH.
    Journal: Biotechniques; 2014 Oct; 57(4):208-10. PubMed ID: 25312091.
    Abstract:
    Here we present a simple in vivo microtiter plate assay using lead acetate [Pb(OAc)2]-soaked filter paper to detect H2S released by Escherichia coli metabolizing cysteine. The released H2S precipitates as brown lead sulfide (PbS) on Pb(OAc)2 soaked filter paper. The PbS stain quantitated by ImageJ software is proportional to the amount of H2S released from the culture. Expression of recombinant Acidithiobacillus ferrooxidans sulfide:quinone oxidoreductase (SQR) converts the H2S to sulfur, resulting in less PbS formation. The in vivo H2S oxidation activity of SQR was calculated based on the density of the PbS stain formed by E. coli expressing SQR compared with cells harboring the empty vector pLM1. The results are consistent with the in vitro activity of SQR measured by decylubiquinone (DUQ) reduction. This assay can be applied to sulfide metabolizing enzymatic studies, mutant screening and high-throughput inhibitor screens.
    [Abstract] [Full Text] [Related] [New Search]