Unit 3007: Microbial Genetics

1. Introduction to Microbial Genetics

• Overview of microbial genetics
• Structure of microbial genomes
  • Prokaryotic genomes: chromosome organization, plasmids
  • Eukaryotic microbial genomes
• Gene expression in microorganisms
  • Transcription and translation basics
• Genetic variation in microbes
  • Sources and significance

2. Mechanisms of DNA Replication in Microbes

• DNA replication fundamentals
• Key enzymes and proteins involved
  • DNA polymerases, helicase, primase, ligase
• Steps of DNA replication
• Comparison between prokaryotic and eukaryotic replication
  • Replication origins, replication forks
• Replication fidelity and proofreading mechanisms

3. Gene Regulation in Bacteria

• Importance of gene regulation
• Mechanisms of bacterial gene regulation
  • Operons (e.g., lac operon, trp operon)
  • Transcription factors and regulatory proteins
  • Sigma factors
• Environmental signals and gene expression modulation

4. Horizontal Gene Transfer in Microorganisms

• Definition and significance
• Mechanisms of horizontal gene transfer
  • Transformation
  • Transduction
  • Conjugation
• Implications for microbial evolution and antibiotic resistance

5. Mutations and Mutagenesis in Microbial Genetics

• Types of mutations
  • Point mutations, insertions, deletions, frameshifts
• Causes of mutations
  • Spontaneous vs induced mutations
• Effects of mutations on gene function
• Mutagenesis processes and applications

6. Plasmids and Mobile Genetic Elements

• Characteristics of plasmids
• Types of mobile genetic elements
  • Transposons, integrons
• Role in horizontal gene transfer
• Significance in antibiotic resistance, virulence, and adaptation

7. Genetic Engineering and Biotechnology in Microorganisms

• Overview of genetic engineering
• Techniques in microbial genetics
  • Gene cloning
  • Gene editing (e.g., CRISPR-Cas systems)
  • Recombinant protein production
• Applications in medicine, agriculture, and industry

8. Evolutionary Genetics of Microbes

• Mechanisms of microbial evolution
  • Natural selection
  • Genetic drift
  • Gene flow
• Impact on microbial diversity and adaptation
• Case studies illustrating microbial evolution