Manganese import protects Salmonella enterica serovar Typhimurium against nitrosative stress

Nitric oxide (NO˙) is a radical molecule produced by mammalian phagocytic cells as part of the innate immune response to bacterial pathogens. It exerts its antimicrobial activity in part by impairing the function of metalloproteins, particularly those containing iron and zinc cofactors. The pathogen...

Full description

Saved in:
Bibliographic Details
Published in:Metallomics 2020-11, Vol.12 (11), p.1791-1801
Main Authors: Yousuf, Shehla, Karlinsey, Joyce E, Neville, Stephanie L, McDevitt, Christopher A, Libby, Stephen J, Fang, Ferric C, Frawley, Elaine R
Format: Article
Language:English
Subjects:
Antiinfectives and antibacterials
Antimicrobial activity
Cofactors
Derepression
Immune response
Innate immunity
Iron
Magnesium
Manganese
Nitric oxide
Phagocytes
Salmonella
Salmonella enterica
Stress
Zinc
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:Nitric oxide (NO˙) is a radical molecule produced by mammalian phagocytic cells as part of the innate immune response to bacterial pathogens. It exerts its antimicrobial activity in part by impairing the function of metalloproteins, particularly those containing iron and zinc cofactors. The pathogenic Gram-negative bacterium Salmonella enterica serovar typhimurium undergoes dynamic changes in its cellular content of the four most common metal cofactors following exposure to NO˙ stress. Zinc, iron and magnesium all decrease in response to NO˙ while cellular manganese increases significantly. Manganese acquisition is driven primarily by increased expression of the mntH and sitABCD transporters following derepression of MntR and Fur. ZupT also contributes to manganese acquisition in response to nitrosative stress. S. Typhimurium mutants lacking manganese importers are more sensitive to NO˙, indicating that manganese is important for resistance to nitrosative stress.
ISSN:1756-5901
1756-591X
DOI:10.1039/d0mt00178c