'Repressor ' presentation slideshows

Regulation of Gene Expression Chapter 18

Regulation of Gene Expression Chapter 18. Gene expression. Flow of genetic information Genotype to phenotype Genes to proteins Proteins not made at random Specific purposes Appropriate times. Control of gene expression. Selective expression of genes

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Why genes are regulated?

Why genes are regulated?. Minimize energy consumption--why express a gene you do not need? (economy) Control growth--many cells in a mature organism do not grow, and expression of genes involved in promoting cell division is tightly regulated . (physiological balance)

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The Wonderful World of Repressors

The Wonderful World of Repressors. Supriya Pokhrel, Firras Garada, Sonia Sharma, Kristen Wade, Trevor Faske, Mandi Feinberg. Background. - Repressor protein binds to upstream promoter regions - blocks transcription of downstream genes - allows for regulation of lytic vs. lysogenic cycles.

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Chapter 10

Chapter 10. The operon.

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Chapter 10

Chapter 10. The operon.

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Gene Regulation in Prokaryotes

Gene Regulation in Prokaryotes. Outline of Chapter 16. There are many steps in gene expression and regulation can occur at any one of them Genetic and molecular studies show that most regulation affects the initiation of RNA transcripts Studies of genes for lactose utilization

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L1 The lac operon

Section L Regulation of Transcription in Prokaryotes L1 The lac operon L2 The trp operon L3 Transcriptional regulation by alternative s factor. L1 The lac operon. The operon The lactose operon The lac repressor Induction cAMP receptor protein.

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Gene Expression Regulation: The lac Operon

Gene Expression Regulation: The lac Operon. Control Mechanisms. There are 42 000 genes that code for proteins in humans However, not all proteins are required at all times. E.g. Insulin is only required in a cell when glucose levels are high.

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Exodus 15:26

Exodus 15:26

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Bacteriophage lambda (l)

Bacteriophage lambda (l). Transcriptional switches can regulate cellular decisions. Lysis or Lysogeny. Lysis : Infection by phage produces many progeny and breaks open (lyses) the host bacterium

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Controlling Gene Expression

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Phage Lab @

Phage Lab @. Et2Brutus, cluster A2. BruceB , cluster G. Cluster G phage: BruceB , discovered by Catherine Halpern. Extremely conserved cluster Blastn 95-99% identity over genome length Some infect M. tuberculosis with decent efficiency Novel feature is MPME, pham 139. Pari (A1)

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Control of Gene Expression

Control of Gene Expression. Big Idea 3: Living systems store, retrieve, transmit, and respond to info essential to life processes. Essential Knowledge. 3B1: Gene regulation results in differential gene expression, leading to cell specialization.

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Conversation Starters

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Recombinant Expression of PDI in E. coli

0. Recombinant Expression of PDI in E. coli. Natasha Cortez ABE Summer Workshop 2007. 0. Overview.

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Operons fancy light switches

Operons fancy light switches. Ch 18. We all seek control. Think of a light switch Two purposes, on and off Sometimes we need light Advantages: have it when needed, i.e. the expression of what we want We can use this built in convenience mechanism to use things when necessary

235 views • 14 slides

In medium with glucose as the only sugar In medium with glucose and lactose

preQ: Under which conditions will E. coli cells express (transcribe and translate) lots of beta-galactosidase?. In medium with glucose as the only sugar In medium with glucose and lactose In medium with lactose as the only sugar In medium with galactose All of the above.

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Bacterial Operons

Bacterial Operons. A model of gene expression regulation Ch 18.4. Bacteria Organize their genes into operons. Grouping genes with related functions into one transcriptional unit with a single on-off switch to control the group

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Chapter 12 Vocab not in glossary

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Off

Notch. Hedgehog. Hypoxia. HDAC. ARNT. Repressor. SMRT. E1A. CSL. E1A. E1A. Ci-75. Off. PCAF. CBP. CBP. ARNT. HIF-1 ?. NotchIC. CSL. E1A. E1A. E1A. Ci. On. NotchIC. ARNT. HIF-1 ?. CSL. Ci. X-E1A. X-E1A. X-E1A. Positive Feedback. E1A. E1A. E1A. X. X. X.

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