#10829 NTR:xylanase activity

[Jim Hu]

GO:0031176 ! endo-1,4-beta-xylanase activity has

synonym: "xylanase" BROAD [EC:3.2.1.8]

but only has the parent GO:0004553 ! hydrolase activity, hydrolyzing O-glycosyl compounds. This suggests that there should either be an intermediate parent for xylanase activity.

I found a review of the kinds of xylanases at http://www.trnres.com/ebook/uploads/gonzalezfinal/T_1231139053gonzalez%2014.pdf

This paper shows that there are exoxylanases

http://aem.asm.org/content/61/4/1666.full.pdf+html

[Paola Roncaglia]

Hi Jim, I did the following:

Added new terms:

[Term]
id: GO:0097599
name: xylanase activity
namespace: molecular_function
def: "Catalysis of the hydrolysis of xylans, homopolysaccharides composed of xylose residues." [GOC:jh2, ISBN:81-7736-269-0]
synonym: "xylosidase activity" RELATED []
is_a: GO:0004553 ! hydrolase activity, hydrolyzing O-glycosyl compounds

[Term]
id: GO:0097600
name: exoxylanase activity
namespace: molecular_function
def: "A xylanase activity that acts on one of the ends of a xylan polymer which does not contain side chains." [GOC:jh2, ISBN:81-7736-269-0, PMID:16535010]
is_a: GO:0097599 ! xylanase activity

Made the following existing terms is_a children of GO:0097599 xylanase activity
(and removed their current is_a links to 'hydrolase activity, hydrolyzing O-glycosyl compounds'):
endo-1,4-beta-xylanase activity
glucuronoarabinoxylan endo-1,4-beta-xylanase activity
xylan 1,3-beta-xylosidase activity
xylan endo-1,3-beta-xylosidase activity
xylan 1,4-beta-xylosidase activity

Thanks,
Paola

[Jim Hu]

thanks!

Sent from my iPad

On May 6, 2014, at 8:00 AM, "Paola Roncaglia" paolaroncaglia@users.sf.net wrote:

Hi Jim, I did the following:

Added new terms:

[Term]
id: GO:0097599
name: xylanase activity
namespace: molecular_function
def: "Catalysis of the hydrolysis of xylans, homopolysaccharides composed of xylose residues." [GOC:jh2, ISBN:81-7736-269-0]
synonym: "xylosidase activity" RELATED []
is_a: GO:0004553 ! hydrolase activity, hydrolyzing O-glycosyl compounds

[Term]
id: GO:0097600
name: exoxylanase activity
namespace: molecular_function
def: "A xylanase activity that acts on one of the ends of a xylan polymer which does not contain side chains." [GOC:jh2, ISBN:81-7736-269-0, PMID:16535010]
is_a: GO:0097599 ! xylanase activity

Made the following existing terms is_a children of GO:0097599 xylanase activity
(and removed their current is_a links to 'hydrolase activity, hydrolyzing O-glycosyl compounds'):
endo-1,4-beta-xylanase activity
glucuronoarabinoxylan endo-1,4-beta-xylanase activity
xylan 1,3-beta-xylosidase activity
xylan endo-1,3-beta-xylosidase activity
xylan 1,4-beta-xylosidase activity

Thanks,
Paola

[ontology-requests:#10829] NTR:xylanase activity

Status: open
Group: None
Labels: enzymes
Created: Mon May 05, 2014 02:15 PM UTC by Jim Hu
Last Updated: Mon May 05, 2014 07:38 PM UTC
Owner: Paola Roncaglia

GO:0031176 ! endo-1,4-beta-xylanase activity has

synonym: "xylanase" BROAD [EC:3.2.1.8]

but only has the parent GO:0004553 ! hydrolase activity, hydrolyzing O-glycosyl compounds. This suggests that there should either be an intermediate parent for xylanase activity.

I found a review of the kinds of xylanases at http://www.trnres.com/ebook/uploads/gonzalezfinal/T_1231139053gonzalez%2014.pdf

This paper shows that there are exoxylanases

http://aem.asm.org/content/61/4/1666.full.pdf+html

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