Topics outline (for the part taught by Dr. David K. Banfield) Gene Relationship between genome complexity and organism DNA content Features that contribute to genome complexity Spacer sequences Difference between prokaryotic and eukaryotic genes Functions of introns Gene duplication New gene Transposable element Bacteria can horizontally transfer DNA Multicopy genes Pseudogenes Repetitive DNA sequences Eukaryotic chromosomes Condensed vs decondensed chromatin Chromosomes Chromatin Histone protein Nucleosome Packing DNA chromatin and chromatin condensation Electrophoresis Chromatin Chromosome condensation Position effect in gene expression Metaphase chromosomes Replication (DNA) Centromeres Replication origins Identification of replication origin Protein machines Structure of DNA 5’ to 3’ Helicases and single-stranded DNA binding proteins (SSB) -1– Based on lectures given in 2004 fall semester BIOL 104 courses Telomeres DNA synthesis at telomeres Accuracy of DNA replications Consequence of errors Cancer incidence DNA mismatch repair proteins Cells NEED to repair damaged DNA Sources of DNA damages Mechanisms of DNA repair Gene regulation Gene expression and its regulation Cell-specific gene expression From DNA to RNA transcription and to proteins The flow of genetic material Functional difference between DNA and RNA Types of RNA Transcription (e- microscopy) Regulation of transcription Eukaryotic polymerase Types of genes Transcription factors and initiation of transcription and RNA polymerase II Affinity purification PAGE General transcription factors Promoters Transcription Structure and function of RNA polymerase II (video) TATA box binding protein (video) Promoter and enhancer sequence Cis-acting regulatory elements Transcriptional factors Activator proteins Genes expressed with different efficiency Chromatin structure and transcription (gene activator proteins) Specific transcription regulatory proteins enhancers ?? (gene expression and development) -2– Based on lectures given in 2004 fall semester BIOL 104 courses Drosphilia (non-uniform distribution of gene regulatory proteins) Reporter genes Homeodomain (video) Transcription activators (DNA binding and activation) Function / role of transcription activators Transcriptional repressors Genes transcribed from 1 strand and another The genetic code Single “reading” frames on single DNA strand Possible “reading” frames on double strand RNA processing (capping, polyadenylation, splicing) Polyadenylation Bacterial and eukaryotic mRNA (capping and polyadenylation) Special nucleotides sequence ( begin and end) Alternative splicing Prokaryotes and eukaryotes (transcription and translation simultaneously?) Mark “mature” mRNA Control life-span of mRNAs Eukaryotic and prokaryotic cells handle mRNA differently Translation Regulation Structure of prokaryotic and eukaryotic mRNAs Translation initiation Ribosomes Translation completes the flow of genetic information in the cell Regulation of protein function Protein folding and processing -3– Based on lectures given in 2004 fall semester BIOL 104 courses