Intrinsic disorder in the nickel-dependent urease network

Area of Science:

• Biochemistry
• Microbiology
• Structural Biology

Background:

• Nickel (Ni(II)) ions are crucial for enzymes but toxic at high concentrations.
• Nickel-dependent organisms possess regulatory networks to manage intracellular Ni(II) levels.
• Urease is a key virulence factor in pathogens, essential for host colonization.

Purpose of the Study:

• To investigate the molecular mechanisms underlying nickel ion regulation in bacteria.
• To explore the role of intrinsically disordered proteins in urease production and activity.
• To understand how protein flexibility influences Ni(II) sensing and urease regulation.

Main Methods:

• Analysis of structural and unstructural information.
• Focus on molecular basis of conformational changes and interactions.
• Examination of protein flexibility in Ni(II)-sensors.

Main Results:

• Intrinsically disordered proteins are central to regulatory networks controlling urease.
• Protein flexibility in Ni(II)-sensors modulates DNA interactions and protein-protein interactions.
• Flexibility impacts urease activation and substrate accessibility.

Conclusions:

• Intrinsic disorder plays a critical role in bacterial nickel homeostasis and urease regulation.
• Understanding these mechanisms is key to developing novel antimicrobial strategies.
• Targeting these regulatory networks may yield new drugs for bacterial eradication.