Luciferin

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Luciferin

Luciferin (from <a href="/en/Latin_language" title="Latin language" class="mw-redirect wl">Latin</a> <a href="https://en.wiktionary.org/wiki/lucifer#Latin" title="wikt:lucifer" class="extiw" target="_blank">lucifer</a>&nbsp;'light-bearer') is a generic term for the light-emitting <a href="/en/Chemical_compound" title="Chemical compound" class="wl">compound</a> found in organisms that generate <a href="/en/Bioluminescence" title="Bioluminescence" class="wl">bioluminescence</a>. Luciferins typically undergo an <a href="/en/Enzyme" title="Enzyme" class="wl">enzyme</a>-catalyzed reaction with <a href="/en/Oxygen" title="Oxygen" class="wl">molecular oxygen</a>. The resulting transformation, which usually involves splitting off a molecular fragment, produces an <a href="/en/Excited_state" title="Excited state" class="wl">excited state</a> intermediate that emits light upon decaying to its <a href="/en/Ground_state" title="Ground state" class="wl">ground state</a>. The term may refer to molecules that are substrates for both <a href="/en/Luciferase" title="Luciferase" class="wl">luciferases</a> and <a href="/en/Photoprotein" title="Photoprotein" class="wl">photoproteins</a>.<a href="#cite_note-pmid8707056-1" style="counter-reset: mw-Ref 1;">[1]</a>

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<figure class="mw-halign-right wiki-thumb"><a href="/en/File:Firefly-luciferin-3D-vdW.png" class="mw-file-description image media-thumb" data-hash="File:Firefly-luciferin-3D-vdW.png"><img loading="lazy" src="//upload.wikimedia.org/wikipedia/commons/thumb/d/d0/Firefly-luciferin-3D-vdW.png/300px-Firefly-luciferin-3D-vdW.png" decoding="async" data-file-width="1100" data-file-height="701" data-file-type="bitmap" height="191" width="300" srcset="//upload.wikimedia.org/wikipedia/commons/thumb/d/d0/Firefly-luciferin-3D-vdW.png/450px-Firefly-luciferin-3D-vdW.png 1.5x, //upload.wikimedia.org/wikipedia/commons/thumb/d/d0/Firefly-luciferin-3D-vdW.png/600px-Firefly-luciferin-3D-vdW.png 2x" alt="Firefly-luciferin-3D-vdW.png"></a><figcaption>This is a <a href="/en/Space-filling_model" title="Space-filling model" class="wl">space-filling model</a> of <a href="/en/Firefly" title="Firefly" class="wl">firefly</a> luciferin. Color coding: yellow=<a href="/en/Sulfur" title="Sulfur" class="wl">sulfur</a>; blue=<a href="/en/Nitrogen" title="Nitrogen" class="wl">nitrogen</a>; black=<a href="/en/Carbon" title="Carbon" class="wl">carbon</a>; red=<a href="/en/Oxygen" title="Oxygen" class="wl">oxygen</a>; white=<a href="/en/Hydrogen" title="Hydrogen" class="wl">hydrogen</a>.</figcaption></figure>

Luciferin is a generic term for the light-emitting compound found in organisms that generate bioluminescence. Luciferins typically undergo an enzyme-catalyzed reaction with molecular oxygen. The resulting transformation, which usually involves splitting off a molecular fragment, produces an excited state intermediate that emits light upon decaying to its ground state. The term may refer to molecules that are substrates for both luciferases and photoproteins. 