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<title>Tripeptide</title>

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<span id="openzim-page-title" class="mw-page-title-main"><span class="mw-page-title-main">Tripeptide</span></span>

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<p>A <b>tripeptide</b> is a <a href="Peptide" title="Peptide">peptide</a> derived from three <a href="Amino_acid" title="Amino acid">amino acids</a> joined by two or sometimes three <a href="Peptide_bond" title="Peptide bond">peptide bonds</a>.<sup id="cite_ref-1" class="reference"><a href="#cite_note-1"><span class="cite-bracket">[</span>1<span class="cite-bracket">]</span></a></sup> As for proteins, the function of peptides is determined by the constituent amino acids and their sequence. In terms of scientific investigations, the dominant tripeptide is <a href="Glutathione" title="Glutathione">glutathione</a> (γ-<small>L</small>-Glutamyl-<small>L</small>-cysteinylglycine), which serves many roles in many forms of life.<sup id="cite_ref-Wu_2-0" class="reference"><a href="#cite_note-Wu-2"><span class="cite-bracket">[</span>2<span class="cite-bracket">]</span></a></sup>

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<div class="mw-heading mw-heading2"><h2 id="Examples">Examples</h2></div>

<ul><li>Eisenin (pGlu-Gln-Ala-OH) is a peptide with immunological activity that is isolated from the Japanese marine alga, <i>Eisenia bicyclis</i>, which more commonly is known as <a href="Arame" title="Arame">Arame</a></li>

<li><a href="Copper_peptide_GHK-Cu" title="Copper peptide GHK-Cu">GHK-Cu</a> (glycyl-<small>L</small>-histidyl-<small>L</small>-lysine) is a human copper binding peptide with wound healing and skin remodeling activity, which is used in anti-aging cosmetics and more commonly referred to as <a href="Copper_peptide_GHK-Cu" title="Copper peptide GHK-Cu">copper peptide</a></li>

<li><a href="Lactotripeptides" title="Lactotripeptides">Lactotripeptides</a> (Ile-Pro-Pro and Val-Pro-Pro) found in milk products, act as ACE inhibitors</li>

<li><a href="Leupeptin" title="Leupeptin">Leupeptin</a> (<i>N</i>-acetyl-<small>L</small>-leucyl-<small>L</small>-leucyl-<small>L</small>-argininal) is a <a href="Protease_inhibitor_(biology)" title="Protease inhibitor (biology)">protease inhibitor</a> that also acts as an inhibitor of <a href="Calpain" title="Calpain">calpain</a></li>

<li><a href="Melanostatin" class="mw-redirect" title="Melanostatin">Melanostatin</a> (prolyl-leucyl-glycinamide) is a peptide hormone produced in the <a href="Hypothalamus" title="Hypothalamus">hypothalamus</a> that inhibits the release of <a href="Melanocyte-stimulating_hormone" title="Melanocyte-stimulating hormone">melanocyte-stimulating hormone</a> (MSH)</li>

<li><a href="Ophthalmic_acid" title="Ophthalmic acid">Ophthalmic acid</a> (<small>L</small>-<i>γ</i>-glutamyl-<small>L</small>-<i>α</i>-aminobutyryl-glycine) is an analogue of glutathione isolated from <a href="Lens_(anatomy)" class="mw-redirect" title="Lens (anatomy)">crystalline lens</a></li>

<li>Norophthalmic acid (<i>y</i>-glutamyl-alanyl-glycine) is an analogue of glutathione (<small>L</small>-cysteine replaced by <small>L</small>-alanine) isolated from <a href="Crystalline_lens" class="mw-redirect" title="Crystalline lens">crystalline lens</a></li>

<li><a href="Thyrotropin-releasing_hormone" title="Thyrotropin-releasing hormone">Thyrotropin-releasing hormone</a> (TRH, thyroliberin or protirelin) (<small>L</small>-pyroglutamyl-<small>L</small>-histidinyl-<small>L</small>-prolinamide) is a <a href="Peptide_hormone" title="Peptide hormone">peptide hormone</a> that stimulates the release of <a href="Thyroid-stimulating_hormone" title="Thyroid-stimulating hormone">thyroid-stimulating hormone</a> and <a href="Prolactin" title="Prolactin">prolactin</a> by the <a href="Anterior_pituitary" title="Anterior pituitary">anterior pituitary</a></li>

<li>ACV (δ-(<small>L</small>-α-aminoadipyl)-<small>L</small>-Cys-<small>D</small>-Val) is a key <a href="Biosynthetic" class="mw-redirect" title="Biosynthetic">biosynthetic</a> precursor to <a href="Penicillin" title="Penicillin">penicillin</a> and <a href="Cephalosporin" title="Cephalosporin">cephalosporin</a>.</li></ul>

<ul><li><a href="Dipeptide" title="Dipeptide">Dipeptide</a></li>

<li><a href="Tetrapeptide" title="Tetrapeptide">Tetrapeptide</a></li></ul>

<div class="mw-heading mw-heading2"><h2 id="References">References</h2></div>

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</style><cite id="CITEREFNelsonCox2005" class="citation book cs1">Nelson, David L.; Cox, Michael M. (2005). <i>Principles of Biochemistry</i> (4th ed.). New York: W. H. Freeman. <a href="ISBN_(identifier)" class="mw-redirect" title="ISBN (identifier)">ISBN</a> <bdi>0-7167-4339-6</bdi>.</cite></span>

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<li id="cite_note-Wu-2"><span class="mw-cite-backlink"><b><a href="#cite_ref-Wu_2-0">^</a></b></span> <span class="reference-text"><cite id="CITEREFGuoyao_Wu,_Yun-Zhong_Fang,_Sheng_Yang,_Joanne_R._Lupton,_Nancy_D._Turner2004" class="citation journal cs1">Guoyao Wu, Yun-Zhong Fang, Sheng Yang, Joanne R. Lupton, Nancy D. Turner (2004). <a rel="nofollow" class="external text" href="https://doi.org/10.1093%2Fjn%2F134.3.489">"Glutathione Metabolism and its Implications for Health"</a>. <i>Journal of Nutrition</i>. <b>134</b> (3): <span class="nowrap">489–</span>492. <a href="Doi_(identifier)" class="mw-redirect" title="Doi (identifier)">doi</a>:<span class="id-lock-free" title="Freely accessible"><a rel="nofollow" class="external text" href="https://doi.org/10.1093%2Fjn%2F134.3.489">10.1093/jn/134.3.489</a></span>. <a href="PMID_(identifier)" class="mw-redirect" title="PMID (identifier)">PMID</a> <a rel="nofollow" class="external text" href="https://pubmed.ncbi.nlm.nih.gov/14988435">14988435</a>.</cite><span class="cs1-maint citation-comment"><code class="cs1-code">{{cite journal}}</code>: CS1 maint: multiple names: authors list (link)</span></span>

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