Recent advances in understanding Streptomyces.

Area of Science:

• Microbiology and Genetics
• Genomics and Molecular Biology

Background:

• Streptomyces are prolific antibiotic producers, making them crucial in medicine and industry.
• Recent research (2014-2016) has significantly advanced our understanding of Streptomyces biology.

Approach:

• This review synthesizes approximately 100 papers focusing on Streptomyces evolution, ecology, pathogenicity, growth, stress responses, secondary metabolism, and gene expression.
• Genomic approaches, including next-generation sequencing and ChIP-seq, have been pivotal in accelerating discoveries.
• Streptomyces venezuelae serves as a key model system for investigating developmental biology.

Key Points:

• Genomic data confirms interspecies recombination and accessory gene exchange during Streptomyces evolution.
• Close associations with plants, fungi, and insects highlight the importance of cellulose and chitin utilization regulators.
• Nucleotide secondary messengers (e.g., cyclic di-GMP) and phosphorylation control developmental processes like germination and sporulation.
• Endogenous nitric oxide production influences regulatory Wbl proteins during stress.
• Regulatory crosstalk within and between metabolic pathways, even between species, impacts secondary metabolism.
• A significant portion (21%) of Streptomyces mRNA species lack leader sequences and ribosome binding sites.

Conclusions:

• Genomic and technical advancements are rapidly expanding knowledge of Streptomyces.
• Further research promises more effective exploitation of these vital microorganisms for antibiotic discovery and other applications.