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Updated: Jun 5, 2026

Synthesis of Infectious Bacteriophages in an E. coli-based Cell-free Expression System

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Published on: August 17, 2017

Bacterial NO Synthases.

S Iu Filippovich¹

¹Bach Institute of Biochemistry, Russian Academy of Sciences, Moscow, Russia. syf@inbi.ras.ru

Biochemistry. Biokhimiia

|December 21, 2010

Summary

Bacterial nitric oxide synthases (NOS) typically lack reductase domains, unlike their mammalian counterparts. This study explores the unique structure, evolutionary links, and diverse functions of bacterial NOS, including roles in DNA repair and antibiotic resistance.

Area of Science:

Biochemistry
Microbiology
Enzymology

Background:

Mammalian nitric oxide synthases (NOS) possess distinct reductase domains, unlike most bacterial NOS.
The NOS from myxobacterium Sorangium cellulosum is an exception, featuring an unusually structured and located reductase domain.
Advances in bacterial genomics facilitate the identification and study of NOS oxygenase domains in various bacterial species.

Purpose of the Study:

To elucidate the structural characteristics of bacterial nitric oxide synthases (NOS).
To investigate the sources of reducing equivalents utilized by bacterial NOS.
To explore the evolutionary relationships and diverse functional roles of bacterial NOS.

Main Methods:

Comparative genomics to identify NOS genes in bacterial genomes.

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Bioinformatic analysis of NOS domain structures and evolutionary relationships.

Literature review of established functions of bacterial NOS.

Main Results:

Bacterial NOS primarily consist of an oxygenase domain, differing from mammalian NOS.
The study details unique structural features, evolutionary connections, and diverse functions of bacterial NOS.
Identified functions include tryptophan nitration, UV damage repair, oxidative stress adaptation, cGMP synthesis, and antibiotic resistance.

Conclusions:

Bacterial NOS exhibit significant structural and functional diversity compared to mammalian NOS.
The identified functions highlight the critical roles of bacterial NOS in bacterial physiology and survival.
Further research into bacterial NOS can reveal novel biochemical pathways and potential therapeutic targets.