Enzyme - Revision history

Prab at 12:34, 21 March 2025

2025-03-21T12:34:03Z

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 {{SI}}
 Enzymes are [[large biological molecules]] that play a crucial role in sustaining life. They drive thousands of [[metabolic processes]] that are essential for the survival of organisms. Their primary function is to act as highly selective [[catalysts]], greatly enhancing both the speed and specificity of metabolic reactions. These reactions range from the [[digestion]] of food to the intricate [[synthesis of DNA]].
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 Several enzymes find commercial applications. For instance, some are employed in the synthesis of [[antibiotics]]. Household products also harness the power of enzymes to expedite biochemical reactions. For example, biological washing powders contain enzymes that break down protein or fat stains on clothes. Likewise, enzymes in meat tenderizers decompose proteins into smaller molecules, rendering the meat more tender and easier to chew.
 =='''See Also'''==
 * [[Metabolism]]
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 [[Category:Catalysis]]
 [[Category:Process chemicals]]

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	File:DHFR_methotrexate_inhibitor.svg\|Enzyme		File:DHFR_methotrexate_inhibitor.svg\|Enzyme
	File:Methotrexate_vs_folate_2.svg\|Enzyme		File:Methotrexate_vs_folate_2.svg\|Enzyme
			</gallery>
			== Enzyme ==
			<gallery>
			File:Enzyme mechanism 2.svg\|Enzyme mechanism
			File:Michaelis Menten curve 2.svg\|Michaelis-Menten curve
			File:DHFR methotrexate inhibitor.svg\|DHFR methotrexate inhibitor
			File:Methotrexate vs folate 2.svg\|Methotrexate vs folate
	</gallery>		</gallery>

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			<gallery>
			File:Glucosidase_enzyme.png\|Enzyme
			File:IUPAC_definition_for_enzymes.png\|Enzyme
			File:Eduardbuchner.jpg\|Enzyme
			File:Q10_graph_c.svg\|Enzyme
			File:Enzyme_structure.svg\|Enzyme
			File:Hexokinase_induced_fit.svg\|Enzyme
			File:Transketolase_+_TPP.png\|Enzyme
			File:Enzyme_catalysis_energy_levels_2.svg\|Enzyme
			File:Enzyme_mechanism_2.svg\|Enzyme
			File:Michaelis_Menten_curve_2.svg\|Enzyme
			File:DHFR_methotrexate_inhibitor.svg\|Enzyme
			File:Methotrexate_vs_folate_2.svg\|Enzyme
			</gallery>

Prab: Replaced content with "{{SI}} Enzymes are large biological molecules that play a crucial role in sustaining life. They drive thousands of metabolic processes that are essential for the s..."

2023-08-28T16:52:23Z

Replaced content with "{{SI}} Enzymes are large biological molecules that play a crucial role in sustaining life. They drive thousands of metabolic processes that are essential for the s..."

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{{SI}}
Enzymes are [[large biological molecules]] that play a crucial role in sustaining life. They drive thousands of [[metabolic processes]] that are essential for the survival of organisms. Their primary function is to act as highly selective [[catalysts]], greatly enhancing both the speed and specificity of metabolic reactions. These reactions range from the [[digestion]] of food to the intricate [[synthesis of DNA]].

== Structure and Composition ==
The majority of enzymes are [[proteins]]. However, there are also catalytic [[RNA molecules]] that have been recognized as enzymes. Enzymes are characterized by their specific three-dimensional structures. To facilitate their catalytic action, enzymes might utilize organic cofactors, such as [[biotin]], or inorganic cofactors, for instance, the [[magnesium ion]].

== Functionality ==

=== Enzymatic Reactions ===
In enzymatic reactions, the starting molecules or [[substrates]] undergo conversion to form different molecules, known as [[products]]. For a biological cell to function efficiently and sustain life, nearly all its chemical reactions necessitate enzymes. This is because enzymes accelerate these reactions to rates that are conducive to life. Their selectivity for substrates means that they only expedite specific reactions among myriad possibilities. This specificity is the reason the array of enzymes present in a cell dictates the [[metabolic pathways]] that the cell will undertake.

=== Catalytic Mechanism ===
Just like other catalysts, enzymes function by diminishing the [[activation energy (Ea‡)]] necessary for a reaction. This results in an exponential increase in the reaction rate. Consequently, products form at a much quicker rate, and reactions attain their equilibrium faster. Notably, enzyme reaction rates can be up to millions of times faster than those of equivalent un-catalyzed reactions. Despite their impressive catalytic ability, enzymes are neither consumed in the reactions they facilitate nor do they modify the reactions' equilibrium. However, they do stand out from many other catalysts due to their remarkable substrate specificity. Currently, enzymes are documented to catalyze approximately 4,000 [[biochemical reactions]]. There are also [[RNA molecules]] termed [[ribozymes]] that have a catalytic function, with parts of the [[ribosome]] serving as a prime example. Furthermore, synthetic molecules, referred to as [[artificial enzymes]], exhibit enzyme-like catalysis.

== Regulation and Interactions ==
Various molecules can influence enzyme activity. While [[inhibitors]] are molecules that diminish enzyme activity, [[activators]] are ones that enhance it. Numerous [[drugs]] and poisons function as enzyme inhibitors. Factors like temperature, pressure, chemical environment (such as [[pH]]), and substrate concentration can also impact enzyme activity.

== Commercial and Practical Applications ==
Several enzymes find commercial applications. For instance, some are employed in the synthesis of [[antibiotics]]. Household products also harness the power of enzymes to expedite biochemical reactions. For example, biological washing powders contain enzymes that break down protein or fat stains on clothes. Likewise, enzymes in meat tenderizers decompose proteins into smaller molecules, rendering the meat more tender and easier to chew.

=='''See Also'''==
* [[Metabolism]]
* [[DNA Replication]]
* [[Cell Biology]]
* [[Biotechnology]]
{{stub}}
{{Food chemistry}}
{{Enzymes}}
[[Category:Biomolecules]]
[[Category:Enzymes|*]]
[[Category:Metabolism]]
[[Category:Catalysis]]
[[Category:Process chemicals]]

← Older revision		Revision as of 11:02, 18 February 2025
Line 32:		Line 32:
	[[Category:Catalysis]]		[[Category:Catalysis]]
	[[Category:Process chemicals]]		[[Category:Process chemicals]]
			<gallery>
			File:Glucosidase_enzyme.png\|Enzyme
			File:IUPAC_definition_for_enzymes.png\|Enzyme
			File:Eduardbuchner.jpg\|Enzyme
			File:Q10_graph_c.svg\|Enzyme
			File:Enzyme_structure.svg\|Enzyme
			File:Hexokinase_induced_fit.svg\|Enzyme
			File:Transketolase_+_TPP.png\|Enzyme
			File:Enzyme_catalysis_energy_levels_2.svg\|Enzyme
			File:Enzyme_mechanism_2.svg\|Enzyme
			File:Michaelis_Menten_curve_2.svg\|Enzyme
			File:DHFR_methotrexate_inhibitor.svg\|Enzyme
			File:Methotrexate_vs_folate_2.svg\|Enzyme
			</gallery>