Pyrrolnitrin (CAS 1018-71-9): A Natural Halogenated Antifungal Metabolite for Agricultural and Pharmaceutical
Pyrrolnitrin (CAS No. 1018-71-9), molecular formula C10H6Cl2N2O2 and molecular weight 257.07, is a naturally occurring halogenated pyrrole antibiotic with broad-spectrum antifungal activity. Also commonly searched as PRN, 3-chloro-4-(2-nitro-3-chlorophenyl)pyrrole, Pyrrolnitrine, and Antifungal Pyrrole Antibiotic, Pyrrolnitrin has attracted significant scientific interest due to its potent bioactivity and unique mechanism of action.
As a secondary metabolite isolated from bacteria such as Pseudomonas fluorescens and Burkholderia cepacia, Pyrrolnitrin plays a crucial role in microbial ecological defense and has become an important molecule in agrochemical development, natural product chemistry, and antifungal mechanism research.
Natural Origin and Biosynthetic Importance
Pyrrolnitrin is biosynthetically derived from tryptophan and belongs to the family of chlorinated phenylpyrrole natural products. The biosynthesis involves multiple enzymatic chlorination and oxidative rearrangement steps, making it an important model molecule for studying microbial halometabolite production.
Recent biosynthetic studies have shown that Pyrrolnitrin-producing strains exhibit strong antagonistic activity against soil-borne phytopathogens, highlighting its significance in microbial biocontrol strategies.
Because of its natural origin and targeted antifungal properties, Pyrrolnitrin has become a valuable lead structure for the design of synthetic fungicides.
Mechanism of Antifungal Action
Pyrrolnitrin exhibits potent antifungal activity by disrupting fungal respiratory systems and oxidative phosphorylation.
Mechanistic studies indicate that Pyrrolnitrin:
- inhibits mitochondrial electron transport;
- interferes with ATP generation;
- alters membrane permeability;
- induces intracellular oxidative stress.
Classical biochemical studies demonstrated that Pyrrolnitrin targets the electron transport chain between NADH/succinate oxidation and coenzyme Q transfer, ultimately suppressing fungal growth.
This unique mode of action makes Pyrrolnitrin highly effective against resistant fungal strains.
Applications of Pyrrolnitrin in Scientific Research
1. Agricultural Fungicide Development
Pyrrolnitrin serves as an important lead compound for the development of commercial fungicides.
Notably, synthetic phenylpyrrole fungicides such as:
- Fludioxonil
- Fenpiclonil
were developed based on Pyrrolnitrin’s core pharmacophore.
These fungicides are widely used for seed treatment and crop protection against fungal diseases such as:
- Fusarium spp.
- Rhizoctonia solani
- Botrytis cinerea
Studies confirm that Pyrrolnitrin-derived fungicides have maintained strong efficacy with relatively low resistance development over decades.
2. Natural Product Chemistry Research
Pyrrolnitrin is extensively used in:
- natural product isolation studies;
- biosynthetic pathway elucidation;
- microbial metabolite screening.
Its halogenated pyrrole scaffold offers an important structural model for medicinal chemistry optimization.
3. Antimicrobial Drug Discovery
Beyond antifungal applications, Pyrrolnitrin analogues have shown:
- antibacterial activity;
- antimycobacterial activity;
- cytotoxic activity in tumor cell lines.
These findings support ongoing research into novel therapeutic applications.
4. Biocontrol Agent Screening
In agricultural microbiology, Pyrrolnitrin-producing bacteria are used as biological control agents for sustainable plant disease management.
Its broad-spectrum antifungal activity makes it highly relevant in eco-friendly crop protection systems.
Pyrrolnitrin as a Synthetic Intermediate
Due to its halogenated nitrophenyl-pyrrole structure, Pyrrolnitrin is also used as a synthetic intermediate in:
- phenylpyrrole fungicide synthesis;
- halogenated heterocycle derivatization;
- structure–activity relationship (SAR) studies.
Its scaffold continues to inspire new antifungal lead optimization.
Finetech Industry Limited: Reliable Pyrrolnitrin Supplier
Finetech Industry Limited supplies high-purity Pyrrolnitrin (CAS 1018-71-9) for research and industrial applications.
Our Pyrrolnitrin products support:
- antifungal research;
- agricultural fungicide R&D;
- microbial metabolite studies;
- pharmaceutical discovery.
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Keywords
Pyrrolnitrin; PRN; Pyrrolnitrine; Pyrrolnitrin CAS 1018-71-9; Antifungal Pyrrole Antibiotic; Pyrrolnitrin Supplier; Pyrrolnitrin Research Chemical; Phenylpyrrole Fungicide Intermediate; Natural Antifungal Metabolite; Fludioxonil Intermediate