https://wikimd.com/index.php?action=history&feed=atom&title=X-Pro_dipeptidase 2026-04-22T06:26:39Z Revision history for this page on the wiki MediaWiki 1.44.2 https://wikimd.com/index.php?title=X-Pro_dipeptidase&diff=6425539&oldid=prev 2025-03-04T20:56:01Z

<p>CSV import</p> <p><b>New page</b></p><div>{{DISPLAYTITLE:X-Pro dipeptidase}}<br /> <br /> &#039;&#039;&#039;X-Pro dipeptidase&#039;&#039;&#039;, also known as prolyl dipeptidase, is an [[enzyme]] that plays a crucial role in the metabolism of [[proteins]] by catalyzing the hydrolysis of dipeptides containing a proline residue at the C-terminal position. This enzyme is classified under the [[EC number|EC]] number 3.4.13.9 and is part of the [[peptidase]] family.<br /> <br /> ==Structure==<br /> [[File:4c5y.jpg|Structure of X-Pro dipeptidase|thumb|right]]<br /> X-Pro dipeptidase is a [[metalloenzyme]], meaning it requires a metal ion for its activity. The enzyme typically contains [[zinc]] ions at its active site, which are essential for its catalytic function. The structure of X-Pro dipeptidase is characterized by a compact, globular shape, with the active site located in a cleft that allows substrate binding and catalysis.<br /> <br /> ==Function==<br /> The primary function of X-Pro dipeptidase is to cleave dipeptides where the second amino acid is [[proline]]. This specificity is important because proline has a unique cyclic structure that can affect the conformation of peptides and proteins. By breaking down these dipeptides, X-Pro dipeptidase aids in the recycling of amino acids and the regulation of peptide levels within the cell.<br /> <br /> ==Mechanism of Action==<br /> X-Pro dipeptidase operates through a mechanism that involves the coordination of the substrate to the zinc ion at the active site. The enzyme facilitates the nucleophilic attack on the peptide bond by a water molecule, leading to the cleavage of the bond and the release of the constituent amino acids. This process is highly specific and efficient, allowing the enzyme to process a wide range of dipeptides containing proline.<br /> <br /> ==Biological Significance==<br /> X-Pro dipeptidase is found in various organisms, including [[bacteria]], [[plants]], and [[animals]]. In humans, it is involved in the digestion of dietary proteins and the turnover of intracellular proteins. The enzyme&#039;s activity is crucial for maintaining amino acid homeostasis and for the proper functioning of metabolic pathways that depend on proline-containing peptides.<br /> <br /> ==Clinical Relevance==<br /> Alterations in the activity of X-Pro dipeptidase can have significant clinical implications. For instance, deficiencies in this enzyme may lead to the accumulation of proline-containing peptides, which can be toxic or interfere with normal cellular functions. Understanding the regulation and function of X-Pro dipeptidase is therefore important for developing therapeutic strategies for conditions associated with its dysfunction.<br /> <br /> ==Related pages==<br /> * [[Peptidase]]<br /> * [[Zinc metalloenzyme]]<br /> * [[Protein metabolism]]<br /> <br /> [[Category:Enzymes]]<br /> [[Category:Hydrolases]]<br /> [[Category:Metalloenzymes]]</div>

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