Name: atp breakdown and energy release
Uploaded: 2019-03-11T09:21:09.000Z
Duration: 1 min 8 s
Channel: JoVE

K12 Standards

Virginia  Standards of Learning

HIgh School

Life Science

LS.4

LS.4.b

Hydrolysis of ATP

- [Formateur] La molécule d'adénosine triphosphate, ou ATP,emmagasine l'énergie pour son utilisation dans les cellules. 
Elle consiste en une base d'adénine,un sucre de ribose et trois groupes phosphate,qui sont liés entre euxpar des liaisons phosphoanhydride riches en énergie. 
La rupture de ces liaisons se faitpar ajout d'eaulibérant un ou deux groupes phosphatedans un procédé exergonique appelé hydrolyse. 
Cette réaction libère l'énergie des liaisonspour son utilisation dans les cellules, par exemple,pour synthétiser des protéines à partir d'acides aminés. 
Si un groupe phosphate est retiré,il en résulte une molécule d'ADP, l'adénosine diphosphate,ainsi qu'un phosphate inorganique. 
L'ADP s'hydrolyse ensuite en AMP,l'adénosine monophosphate,par suppression d'un deuxième groupe phosphate.

Takeda, Taka-aki, Shiho Miyazaki, Miki Kobayashi, Katsutoshi Nishino, Tomoko Goto, Mayu Matsunaga, Minami Ooi, et al. « Une carence en zinc provoque un retard de la clairance de l’ATP et de la génération d’adénosine chez les rats et les modèles de culture cellulaire. » Communications Biology 1, n° 1 (22 août 2018) : 113. [<a href="https://web.archive.org/web/20211019032635/https://doi.org/10.1038/s42003-018-0118-3 » target="__blank">Source</a>]

hydrolyse de l'atp

Les liaisons de l’adénosine triphosphate (ATP) peuvent être rompues par l’addition d’eau, libérant un ou deux groupes phosphates au cours d’un processus exergonique appelé hydrolyse. Cette réaction libère l’énergie dans les liaisons pour qu’elle soit utilisée dans la cellule, par exemple, pour synthétiser les protéines à partir d’acides aminés.
 
 Si un groupe phosphate est enlevé, il reste une molécule d’ADP — adénosine diphosphate — avec du phosphate inorganique. L’ADP peut être davantage hydrolysée en AMP — adénosine monophosphate — lorsqu'un deuxième groupe phosphate est enlevé.
 
 <h4>La structure de l’ATP</h4> 
 
 L’ATP se compose d’une base d’adénine, d’un sucre ribose et de trois groupes phosphates, ces derniers étant fixés l’un à l’autre par le biais de liaisons phosphoanhydrides de haute énergie.

Hydrolyse de l'ATP

Les liaisons de l’adénosine triphosphate (ATP) peuvent être rompues par l’ajout d’eau, libérant un ou deux groupes phosphate dans un processus exergonique ...

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Biology

Biologie

Cellular Processes

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Metabolism

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KEY TERMS AND CONCEPTS

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atp breakdown and energy release

ATP breakdown releases energy for cell work. Adenosine triphosphate, or ATP, can lose one or two phosphate groups when water is added. This hydrolysis reaction is exergonic, which means it releases energy that the cell can use.

When one phosphate group is removed, ATP becomes ADP, or adenosine diphosphate. Inorganic phosphate is also released. ADP can then be hydrolyzed again to form AMP, or adenosine monophosphate, after a second phosphate group is removed.

ATP has a clear structure. It is made of an adenine base, a ribose sugar, and three phosphate groups. The phosphate groups are linked to each other by high-energy phosphoanhydride bonds. Cells use the energy from these bonds for tasks such as building proteins from amino acids.

ATP Breakdown and Energy Release

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hydrolysis of atp

ATP breakdown releases energy for cell work. Adenosine triphosphate, or ATP, can lose one or two phosphate groups when water is added. This hydrolysis reaction is exergonic, which means it releases energy that the cell can use. When one phosphate group is removed, ATP becomes ADP, or adenosine diphosphate. Inorganic phosphate is also released. ADP can then be hydrolyzed again to form AMP, or adenosine monophosphate, after a second phosphate group is removed. ATP has a clear structure. It is...

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key terms and concepts

Learn how ATP hydrolysis releases energy, forms ADP and AMP, and supports cell work. See ATP structure and the role of phosphate bonds.

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ATP Breakdown and Energy Release

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