Cited by 163Tuberculosis Research and EpidemiologyBacterial Genetics and BiotechnologyIron Metabolism and Disorders

Mechanisms of iron regulation in mycobacteria: role in physiology and virulence

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Rodriguez, G. Marcela, Smith, Issar·2003·Molecular Microbiology

Abstract

Summary: The role of iron in mycobacteria as in other bacteria goes beyond the need for this essential cofactor. Limitation of this metal triggers an extensive response aimed at increasing iron acquisition while coping with iron deficiency. In contrast, iron‐rich environments prompt these prokaryotes to induce synthesis of iron storage molecules and to increase mechanisms of protection against iron‐mediated oxidative damage. The response to changes in iron availability is strictly regulated in order to maintain sufficient but not excessive and potentially toxic levels of iron in the cell. This response is also linked to other important processes such as protection against oxidative stress and virulence. In bacteria, iron metabolism is regulated by controlling transcription of genes involved in iron uptake, transport and storage. In mycobacteria, this role is fulfilled by the i ron‐d ependent r egulator IdeR. IdeR is an essential protein in Mycobacterium tuberculosis, the causative agent of human tuberculosis. It functions as a repressor of iron acquisition genes, but is also an activator of iron storage genes and a positive regulator of oxidative stress responses.

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Crossref · 10.1046/j.1365-2958.2003.03384.x

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  • In Fe-replete conditions, two IdeR homodimers with four bound Fe ions recognize a 19-base-pair palindromic sequence and negatively regulate expression of proteins required in Fe-depleted conditions.

    “Two homodimers with four bound Fe ions recognize a 19-base-pair palindromic sequence and in Fe-replete conditions and negatively regulate the expression of proteins required in Fe-depleted conditions [65].”

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Authors
Rodriguez, G. M., & Smith, I.
Affiliations
International Center for Public Health (US)
Corresponding author
Smith, Issar
Venue
Molecular Microbiology
Publisher
Wiley
Published
2003-03
Volume
47
Issue
6
Pages
1485-1494
ISSN
  • 0950-382X (ISSN-L)
  • 1365-2958
OpenAlex
W2156343505
Cited by
162
References
81
Citations by year
2026: 4 · 2025: 2 · 2024: 2 · 2023: 3 · 2022: 4 · 2021: 1 · 2020: 6 · 2019: 4 · 2018: 8 · 2017: 4 · 2016: 5 · 2015: 5 · 2014: 6 · 2013: 7 · 2012: 5
FWCI
2.09
Type
journal article
Language
en
Open access
Locations
  • Molecular Microbiology (publishedVersion)
  • PubMed (publishedVersion)
Funders
  • National Institutes of Health
  • National Heart, Lung, and Blood Institute (HL64544, R01HL064544)
  • National Institute of Allergy and Infectious Diseases (AI-44856)
Topics
  • Health Sciences › Medicine › Infectious Diseases › Tuberculosis Research and Epidemiology
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Genetics › Bacterial Genetics and Biotechnology
  • Health Sciences › Medicine › Hematology › Iron Metabolism and Disorders
Keywords
iron regulation, mycobacteria, Mycobacterium tuberculosis, IdeR, iron acquisition, iron storage, oxidative stress response, virulence, iron deficiency, transcriptional regulation
MeSH terms
Iron, Mycobacterium, Virulence, Gene Expression Regulation, Bacterial, Oxidative Stress, Feedback, Physiological

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