lyase

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. Cf.:synthase, synthetase.

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ly·ase 'lī-.ās, -.āz n 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

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n.
one of a group of enzymes that catalyse the linking of groups by double bonds.

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ly·ase (liґās) [EC 4] a class of enzymes that catalyze the cleavage of CC, CO, CN, or other bonds without hydrolysis or oxidation to form two molecules, at least one of which contains a double bond. The reverse reaction occurs by the addition of a group to a molecule at a double bond. The class includes aldolases, deaminases, decarboxylases, hydratases or dehydratases, and other cleavage or cyclase enzymes. See also synthase.

Medical dictionary. 2011.

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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 — /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 lý(ein) to loosen, dissolve (see LYSIS) + ASE] * * *       in physiology, any… …   Universalium

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

  • 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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