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GO:0003674
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molecular_function
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A molecular process that can be carried out by the action of a single macromolecular machine, usually via direct physical interactions with other molecular entities. Function in this sense denotes an action, or activity, that a gene product (or a complex) performs. |
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GO:0003824
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catalytic activity
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Catalysis of a biochemical reaction at physiological temperatures. In biologically catalyzed reactions, the reactants are known as substrates, and the catalysts are naturally occurring macromolecular substances known as enzymes. Enzymes possess specific binding sites for substrates, and are usually composed wholly or largely of protein, but RNA that has catalytic activity (ribozyme) is often also regarded as enzymatic. |
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GO:0016829
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lyase activity
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Catalysis of the cleavage of C-C, C-O, C-N and other bonds by other means than by hydrolysis or oxidation, or conversely adding a group to a double bond. They differ from other enzymes in that two substrates are involved in one reaction direction, but only one in the other direction. When acting on the single substrate, a molecule is eliminated and this generates either a new double bond or a new ring. |
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GO:0016835
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carbon-oxygen lyase activity
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Catalysis of the breakage of a carbon-oxygen bond. |
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GO:0016837
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carbon-oxygen lyase activity, acting on polysaccharides
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Catalysis of the cleavage of a carbon-oxygen bond by the elimination of an alcohol from a polysaccharide. |
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GO:0047491
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poly(alpha-L-guluronate) lyase activity
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Catalysis of the reaction: polysaccharides containing a terminal alpha-L-guluronate group = oligosaccharides with 4-deoxy-alpha-L-erythro-hex-4-enuronosyl end. This reaction is the eliminative cleavage of polysaccharides containing a terminal a-L-guluronate group, to give oligopolysaccharides with 4-deoxy-a-L-erythro-hex-4-enuronosyl groups at their nonreducing ends. |
