PMID- 9382887 OWN - NLM STAT- MEDLINE DCOM- 19971230 LR - 20240214 IS - 0022-1007 (Print) IS - 1540-9538 (Electronic) IS - 0022-1007 (Linking) VI - 186 IP - 11 DP - 1997 Dec 1 TI - A novel antioxidant gene from Mycobacterium tuberculosis. PG - 1885-96 AB - Among the major antimicrobial products of macrophages are reactive intermediates of the oxidation of nitrogen (RNI) and the reduction of oxygen (ROI). Selection of recombinants in acidified nitrite led to the cloning of a novel gene, noxR1, from a pathogenic clinical isolate of Mycobacterium tuberculosis. Expression of noxR1 conferred upon Escherichia coli and Mycobacterium smegmatis enhanced ability to resist RNI and ROI, whether the bacteria were exposed to exogenous compounds in medium or to endogenous products in macrophages. These studies provide the first identification of an RNI resistance mechanism in mycobacteria, point to a new mechanism for resistance to ROI, and raise the possibility that inhibition of the noxR1 pathway might enhance the ability of macrophages to control tuberculosis. FAU - Ehrt, S AU - Ehrt S AD - Division of International Medicine and Infectious Disease, Department of Medicine, Cornell University Medical College, New York 10021, USA. FAU - Shiloh, M U AU - Shiloh MU FAU - Ruan, J AU - Ruan J FAU - Choi, M AU - Choi M FAU - Gunzburg, S AU - Gunzburg S FAU - Nathan, C AU - Nathan C FAU - Xie, Q AU - Xie Q FAU - Riley, L W AU - Riley LW LA - eng SI - GENBANK/Y08323 GR - T32 GM007739/GM/NIGMS NIH HHS/United States GR - GM-07739/GM/NIGMS NIH HHS/United States GR - HL-51967/HL/NHLBI NIH HHS/United States PT - Journal Article PT - Research Support, Non-U.S. Gov't PT - Research Support, U.S. Gov't, P.H.S. PL - United States TA - J Exp Med JT - The Journal of experimental medicine JID - 2985109R RN - 0 (Antioxidants) RN - 0 (Bacterial Proteins) RN - 0 (DNA, Bacterial) RN - 0 (Nitrites) RN - 0 (NoxR1 protein, Mycobacterium tuberculosis) RN - 0 (Reactive Oxygen Species) RN - 0 (Recombinant Fusion Proteins) RN - BBX060AN9V (Hydrogen Peroxide) SB - IM EIN - J Exp Med 1998 Jan 5;187(1):141 MH - Amino Acid Sequence MH - Animals MH - Antioxidants MH - Bacterial Proteins/*genetics/physiology MH - Base Sequence MH - Cloning, Molecular MH - DNA, Bacterial/genetics MH - Escherichia coli/genetics MH - *Genes, Bacterial MH - Hydrogen Peroxide/metabolism MH - Macrophages/metabolism/microbiology MH - Mice MH - Mice, Inbred C57BL MH - Molecular Sequence Data MH - Mycobacterium/genetics MH - Mycobacterium tuberculosis/*genetics MH - Nitrites/*metabolism MH - Oxidation-Reduction MH - Reactive Oxygen Species/*metabolism MH - Recombinant Fusion Proteins/metabolism MH - Transfection MH - Tuberculosis/immunology PMC - PMC2199150 EDAT- 1998/01/07 00:00 MHDA- 1998/01/07 00:01 PMCR- 1998/06/01 CRDT- 1998/01/07 00:00 PHST- 1998/01/07 00:00 [pubmed] PHST- 1998/01/07 00:01 [medline] PHST- 1998/01/07 00:00 [entrez] PHST- 1998/06/01 00:00 [pmc-release] AID - 10.1084/jem.186.11.1885 [doi] PST - ppublish SO - J Exp Med. 1997 Dec 1;186(11):1885-96. doi: 10.1084/jem.186.11.1885.