from The American Heritage® Dictionary of the English Language, 4th Edition

  • n. Any of a class of enzymes that catalyze the linkage of two molecules, generally utilizing ATP as the energy donor. Also called synthetase.

from Wiktionary, Creative Commons Attribution/Share-Alike License

  • n. Any of a group of enzymes that catalyze the binding of two molecules; synthetase.

from the GNU version of the Collaborative International Dictionary of English

  • n. An enzyme which catalyzes creation of a covalent bond between two substrates, resulting in a larger product which is a combination of the two starting materials; especially, DNA ligase, an enzyme which creates a phosphate bond between 5′ and 3′ ends of a DNA chain, resulting in a longer chain of DNA. DNA ligase is important in normal biosynthesis of DNA in the replication cycle of cells.


Latin ligāre, to bind; see leig- in Indo-European roots + -ase.
(American Heritage® Dictionary of the English Language, Fourth Edition)
From Latin lig(are) ("to bind") +‎ -ase. (Wiktionary)



Log in or sign up to get involved in the conversation. It's quick and easy.

  • Has anyone made a list of common catalysts? Anyone? Anyone?
    *would not be surprised either way*
    *begins plotting out cat o' list pun (or equivalent)*

    October 24, 2010

  • I used the more archaic noun form to see if it would catalyze any action. Voilà!

    October 24, 2010

  • I think you mean a catalyst.

    October 24, 2010

  • a catalysis in linking DNA

    October 23, 2010