'Catabolite repression' diaporamas de présentation

Signal transduction

Signal transduction. ???? ???????. Signal transduction and cell division. Signal transduction. in prokaryotes. Regulation of Enzyme Activity. Feedback Inhibition.

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Regulation of Metabolism

Regulation of Metabolism. Rationale for Regulation. Biological Efficiency. Flexibility : adaptaton to dietary changes Need for biosynthetic products Control of pre-existing enzymes Modulation : biosynthesis only as fast as needs for macromolecular syntesis. Competing Reactions: Regulation.

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Molecular Biology and Biochemistry 694:408 / 115:512 Spring 2007, Lectures 13-14

Molecular Biology and Biochemistry 694:408 / 115:512 Spring 2007, Lectures 13-14 Regulation of prokaryotic transcription Watson et al., (2004) Mol. Biol. Of the Gene, Chapter 16 Garrett and Grisham, Biochemistry (2005), Chapter 29 (pg. 942-974)

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Catabolite repression happens when glucose (a catabolite) levels are high .

The lac repressor bound to operator sequences and the CAP-cAMP in complex with its 30 bp binding site . The TATA box and -35 region of the promoter are also indicated. Catabolite repression happens when glucose (a catabolite) levels are high . Then cyclic AMP is inhibited from forming.

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Lecture 12 RNA polymerase as a molecular motor Transcriptional control

Lecture 12 RNA polymerase as a molecular motor Transcriptional control. RNA polymerase as a molecular motor. from Gelles 1998. From S. Block. Average step size = 3.7A, which corresponds to the base spacing in B-DNA. RNAP can back-step!. Transcriptional control (Chapter 7).

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Control of gene expression in bacteria.

Control of gene expression in bacteria. Lecture 20. Chapter 17. RNA polymerase. The CAP protein recruits RNA polymerase to the Lac operon promoter. J G Burr, 10/27/13. The amount or activity of any protein found inside a bacterial cell could be governed in any of 3 ways:.

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Lecture 12 RNA polymerase as a molecular motor Transcriptional control

Lecture 12 RNA polymerase as a molecular motor Transcriptional control. RNA polymerase as a molecular motor. from Gelles 1998. From S. Block. Average step size = 3.7A, which corresponds to the base spacing in B-DNA. RNAP can back-step!. Transcriptional control (Chapter 7).

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Gene Regulation

Gene Regulation. Intro.

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Sites of regulation

Sites of regulation. Feedback inhibition. Mechanism of allosteric inhibition. Repression and Induction. Mechanism of repression- Negative control. Mechanism of repression- control by co-repressor. Operon= a cluster of genes under control of a single promoter Regulon?. Arginine synthesis.

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Sites of regulation

Sites of regulation. Feedback inhibition. Mechanism of allosteric inhibition. Repression and Induction. Mechanism of repression- Negative control. Mechanism of repression- control by co-repressor. Operon= a cluster of genes under control of a single promoter Regulon?. Arginine synthesis.

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Rate of things via spectrophotometry

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Control of Gene Expression

Genetic Regulatory Mechanisms Dr. Jeffrey Patton Associate Professor Pathology, Microbiology, and Immunology USC-School of Medicine. Control of Gene Expression. Transcriptional control Clustering of genes with related function Coordinate control of genes with related function

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Genetic Regulatory Mechanisms

Genetic Regulatory Mechanisms. Control of Gene Expression. Transcriptional control Clustering of genes with related function Coordinate control of genes with related function Polycistronic mRNA. Inducible Genes - Operon Model.

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FACTORS INFLUENCING THE SYNTHESIS OF POLYHYDROXYBUTYRATE DEPOLYMERASE IN STREPTOMYCES SP. 5A

FIGURE 1. CONTACT-INDEPENDENT INDUCTION OF PHB DEPOLYMERASE. FIGURE 3. EFFECT OF 3HB CONCENTRATION ON PHB DEPOLYMERASE SYNTHESIS. A. B.

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