CAZypedia needs your help!
We have many unassigned pages in need of Authors and Responsible Curators. See a page that's out-of-date and just needs a touch-up? - You are also welcome to become a CAZypedian. Here's how.
Scientists at all career stages, including students, are welcome to contribute.
Learn more about CAZypedia's misson here and in this article.
Totally new to the CAZy classification? Read this first.
Difference between revisions of "Polysaccharide Lyase Family 19"
Harry Brumer (talk | contribs) |
Harry Brumer (talk | contribs) |
||
| Line 1: | Line 1: | ||
* [[Responsible Curator]]: ^^^Bernard Henrissat^^^ | * [[Responsible Curator]]: ^^^Bernard Henrissat^^^ | ||
---- | ---- | ||
| + | |||
| + | === PL19 is a deleted family === | ||
| + | ==== History ==== | ||
| + | Entries in [[Glycoside Hydrolase Family 91]] were originally reclassified to [[Polysaccharide Lyase Family 19]] on 30 July 2008 due to recommendations of the NC-IUBMB, which stated that these enzymes are lyases, as there is no water involved in the reaction. Indeed, polysaccharide cleavage occurs via intramolecular hydroxide attack, rather than glycosidic bond hydrolysis (see EC [{{EClink}}4.2.2.17 4.2.2.17] and EC [{{EClink}}4.2.2.18 4.2.2.18]). | ||
| + | |||
| + | The family was ''re-reclassified'' as [[Glycoside Hydrolase Family 91]] on 20 April 2010 due to direct analogy with the lytic transglycosidases of [[GH23]], [[GH102]], [[GH103]], and [[GH104]]. Additionally, a hydrolase (di-fructofuranose 1,2':2,3' dianhydride hydrolase, DFA-IIIase) has also been found in this family <cite>Sakurai1997 Saito2003</cite>. | ||
<!-- The data in the table below should be updated by the Author/Curator according to current information on the family --> | <!-- The data in the table below should be updated by the Author/Curator according to current information on the family --> | ||
| Line 12: | Line 18: | ||
|} | |} | ||
<!-- This is the end of the table --> | <!-- This is the end of the table --> | ||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
| − | |||
==== References ==== | ==== References ==== | ||
Revision as of 00:25, 20 April 2010
- Responsible Curator: ^^^Bernard Henrissat^^^
PL19 is a deleted family
History
Entries in Glycoside Hydrolase Family 91 were originally reclassified to Polysaccharide Lyase Family 19 on 30 July 2008 due to recommendations of the NC-IUBMB, which stated that these enzymes are lyases, as there is no water involved in the reaction. Indeed, polysaccharide cleavage occurs via intramolecular hydroxide attack, rather than glycosidic bond hydrolysis (see EC 4.2.2.17 and EC 4.2.2.18).
The family was re-reclassified as Glycoside Hydrolase Family 91 on 20 April 2010 due to direct analogy with the lytic transglycosidases of GH23, GH102, GH103, and GH104. Additionally, a hydrolase (di-fructofuranose 1,2':2,3' dianhydride hydrolase, DFA-IIIase) has also been found in this family [1, 2].
| CAZy DB links | |
| http://www.cazy.org/fam/GH91.html | |
| http://www.cazy.org/fam/PL19.html |
References
-
H. Sakurai, A. Yokota, Y. Sumita, Y. Mori, H. Matsui and F. Tomita, Metabolism of DFA III by Arthrobacter sp. H65-7: purification and properties of a DFA III hydrolysis enzyme (DFA IIIase). Biosci. Biotechnol. Biochem. 61 (1997), pp. 989–993. DOI: 10.1271/bbb.61.989
- Saito K, Sumita Y, Nagasaka Y, Tomita F, and Yokota A. (2003). Molecular cloning of the gene encoding the di-D-Fructofuranose 1,2':2,3' dianhydride hydrolysis enzyme (DFA IIIase) from Arthrobacter sp. H65-7. J Biosci Bioeng. 2003;95(5):538-40. DOI:10.1016/s1389-1723(03)80058-0 |
This page has been approved by the Responsible Curator as essentially complete. CAZypedia is a living document, so further improvement of this page is still possible. If you would like to suggest an addition or correction, please contact the page's Responsible Curator directly by e-mail.
