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Difference between revisions of "Polysaccharide Lyase Family 19"

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(Created page with '* Responsible Curator: ^^^Bernard Henrissat^^^ ---- === PL19 is a deleted family === ==== History ==== Entries in Glycoside Hydrolase Family 91 were originally reclassif…')
 
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* [[Responsible Curator]]: [[User:Bernard Henrissat|Bernard Henrissat]]
 
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=== PL19 is a deleted family ===
 
=== PL19 is a deleted family ===
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==== History ====
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Entries in [[Glycoside Hydrolase Family 91]] were 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]).
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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]).
 
  
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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.
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The family was ''placed back'' to [[Glycoside Hydrolase Family 91]] on 20 April 2010 due to direct analogy with the lytic transglycosidases of [[GH23]], [[GH102]], [[GH103]], and [[GH104]] and in particular the observation of a hydrolase (di-fructofuranose 1,2':2,3' dianhydride hydrolase, DFA-IIIase) in this family <cite>Sakurai1997 Saito2003 Lombard2010</cite>.
  
 
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==== References ====
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[[Category:Polysaccharide Lyase Families|GH091]]
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<biblio>
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[[Category:Deleted families]]
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#Sakurai1997 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. [http://dx.doi.org/10.1271/bbb.61.989 DOI: 10.1271/bbb.61.989]
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#Saito2003 pmid=16233453
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#Lombard2010 pmid=20925655
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</biblio>
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[[Category:Polysaccharide Lyase Families|PL019]]

Latest revision as of 14:20, 18 December 2021

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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.

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This family has been deleted from the CAZy classification. A specific explanation may be found below.

PL19 is a deleted family

Entries in Glycoside Hydrolase Family 91 were 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 placed back to Glycoside Hydrolase Family 91 on 20 April 2010 due to direct analogy with the lytic transglycosidases of GH23, GH102, GH103, and GH104 and in particular the observation of a hydrolase (di-fructofuranose 1,2':2,3' dianhydride hydrolase, DFA-IIIase) in this family [1, 2, 3].

CAZy DB links
http://www.cazy.org/fam/GH91.html
http://www.cazy.org/fam/PL19.html

References

  1. 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

    [Sakurai1997]
  2. 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 | PubMed ID:16233453 [Saito2003]
  3. Lombard V, Bernard T, Rancurel C, Brumer H, Coutinho PM, and Henrissat B. (2010). A hierarchical classification of polysaccharide lyases for glycogenomics. Biochem J. 2010;432(3):437-44. DOI:10.1042/BJ20101185 | PubMed ID:20925655 [Lombard2010]

All Medline abstracts: PubMed

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