Lecture

Introduction to Metabolism

Graph Chat

Chat with Graph Search

Ask any question about EPFL courses, lectures, exercises, research, news, etc. or try the example questions below.

DISCLAIMER: The Graph Chatbot is not programmed to provide explicit or categorical answers to your questions. Rather, it transforms your questions into API requests that are distributed across the various IT services officially administered by EPFL. Its purpose is solely to collect and recommend relevant references to content that you can explore to help you answer your questions.

Description

This lecture covers the fundamental concepts of metabolism, including the definition of metabolism as the set of biochemical reactions in an organism aimed at transforming energy for the synthesis of precursors and biomolecules. It explains the organization of life chemistry into metabolic pathways, the complexity of metabolic pathways, the circulation of energy in an ecosystem, and the principles of bioenergetics based on the laws of thermodynamics. The lecture also delves into the role of ATP in cellular work, the structure and hydrolysis of ATP, and how enzymes accelerate metabolic reactions by lowering the activation energy barrier. It concludes with a discussion on the regulation of enzymatic activity and the importance of enzyme specificity, cofactors, and enzyme inhibitors.

Official source

Related concepts (32)

Enzyme

Enzymes (ˈɛnzaɪmz) are proteins that act as biological catalysts by accelerating chemical reactions. The molecules upon which enzymes may act are called substrates, and the enzyme converts the substrates into different molecules known as products. Almost all metabolic processes in the cell need enzyme catalysis in order to occur at rates fast enough to sustain life. Metabolic pathways depend upon enzymes to catalyze individual steps.

Enzyme catalysis

Enzyme catalysis is the increase in the rate of a process by a biological molecule, an "enzyme". Most enzymes are proteins, and most such processes are chemical reactions. Within the enzyme, generally catalysis occurs at a localized site, called the active site. Most enzymes are made predominantly of proteins, either a single protein chain or many such chains in a multi-subunit complex. Enzymes often also incorporate non-protein components, such as metal ions or specialized organic molecules known as cofactor (e.

Enzyme inhibitor

An enzyme inhibitor is a molecule that binds to an enzyme and blocks its activity. Enzymes are proteins that speed up chemical reactions necessary for life, in which substrate molecules are converted into products. An enzyme facilitates a specific chemical reaction by binding the substrate to its active site, a specialized area on the enzyme that accelerates the most difficult step of the reaction.

Enzyme kinetics

Enzyme kinetics is the study of the rates of enzyme-catalysed chemical reactions. In enzyme kinetics, the reaction rate is measured and the effects of varying the conditions of the reaction are investigated. Studying an enzyme's kinetics in this way can reveal the catalytic mechanism of this enzyme, its role in metabolism, how its activity is controlled, and how a drug or a modifier (inhibitor or activator) might affect the rate. An enzyme (E) is typically a protein molecule that promotes a reaction of another molecule, its substrate (S).

Metabolism

Metabolism (məˈtæbəlɪzəm, from μεταβολή metabolē, "change") is the set of life-sustaining chemical reactions in organisms. The three main functions of metabolism are: the conversion of the energy in food to energy available to run cellular processes; the conversion of food to building blocks for proteins, lipids, nucleic acids, and some carbohydrates; and the elimination of metabolic wastes. These enzyme-catalyzed reactions allow organisms to grow and reproduce, maintain their structures, and respond to their environments.

Related lectures (64)

Cellular Communication and Metabolism: Energy Transformation Principles

Discusses cellular communication, metabolism, energy transformation, and the role of enzymes in biochemical reactions.

Metabolic Flux Balance Analysis

Covers modeling and analyzing complex biological networks, focusing on metabolism and signaling, using techniques like flux balance analysis and kinetic modeling.

Enzyme Kinetics: Understanding Reaction Rates and Mechanisms

Covers enzyme kinetics, focusing on reaction rates, the Michaelis-Menten equation, and factors affecting enzyme activity.

Thermodynamics: Energy Transformation

Covers energy transformation in thermodynamics, discussing laws, entropy, and spontaneity criteria for reactions.

Enzymes: Basic Concepts and Kinetics