lyase

lyase
/luy"ays, -ayz/, n. Biochem.
any of various enzymes, as decarboxylase, that catalyze reactions involving the formation of or addition to a double bond.
[1960-65; < Gk (ein) to loosen, dissolve (see LYSIS) + -ASE]

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      in physiology, any member of a class of enzymes that catalyze the addition or removal of the elements of water (hydrogen, oxygen), ammonia (nitrogen, hydrogen), or carbon dioxide (carbon, oxygen) at double bonds. For example, decarboxylases remove carbon dioxide from amino acids and dehydrases remove water. See enzyme.

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Universalium. 2010.

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  • Lyase — ist in der Biochemie der Oberbegriff für alle Enzyme, die eine Molekülspaltung katalysieren. Beispiel: A–B → A + B Sie haben die EC Nummer EC 4. Synthasen, welches ebenfalls Lyasen sind, katalysieren die Synthese komplexerer Produkte aus… …   Deutsch Wikipedia

  • lyase — [lī′ās΄, lī′āz΄] n. any of a class of enzymes that act as catalysts in chemical reactions involving double bonds …   English World dictionary

  • Lyase — En biochimie, une lyase est une enzyme qui catalyse la rupture de différentes liaisons chimiques par des moyens autres que l hydrolyse ou l oxydation, formant ainsi souvent une nouvelle liaison double ou un nouveau cycle. Par exemple une enzyme… …   Wikipédia en Français

  • Lyase — In biochemistry, a lyase is an enzyme that catalyzes the breaking of various chemical bonds by means other than hydrolysis and oxidation, often forming a new double bond or a new ring structure. For example, an enzyme that catalyzed this reaction …   Wikipedia

  • lyase — liazė statusas T sritis chemija apibrėžtis Fermentas, katalizuojantis atomų arba grupių prisijungimo prie dvigubųjų ryšių arba atvirkštines reakcijas. atitikmenys: angl. lyase rus. лиаза …   Chemijos terminų aiškinamasis žodynas

  • lyase — noun Date: 1961 an enzyme (as a decarboxylase) that forms double bonds by removing groups from a substrate other than by hydrolysis or that adds groups to double bonds …   New Collegiate Dictionary

  • lyase — noun Any of many classes of enzyme that catalyze the breaking of a specific form of bond …   Wiktionary

  • lyase — Class name for those enzymes removing groups nonhydrolytically (EC class 4); prefixes such as “hydro ” and “ammonia ” are used to indicate the type of reaction. Trivial names for lyases include synthases, decarboxylases, aldolases, dehydratases.… …   Medical dictionary

  • Lyase — Ly|a|se 〈f. 19; Biochem.〉 Enzym, das organische Verbindungen in Bruchstücke spaltet [zu grch. lyein „lösen“] * * * Ly|a|se [griech. lýein = lösen, auflösen, trennen, befreien; ↑ ase], die; , n: nicht empfohlenes Syn.: Synthase: Gruppenbez. für… …   Universal-Lexikon

  • Lyase — Ly|a|se 〈f.; Gen.: , Pl.: n; Biochemie〉 Enzym, das organische Verbindungen in Bruchstücke spaltet [Etym.: <grch. lyein »lösen«] …   Lexikalische Deutsches Wörterbuch

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