169.234.235.74: /* Arborally satisfied point sets */

2014-01-23T08:25:04Z

Arborally satisfied point sets

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{{Infobox enzyme
| Name = Lacto-N-biosidase
| EC_number = 3.2.1.140
| CAS_number = 146359-52-6
| IUBMB_EC_number = 3/2/1/140
| GO_code =
| image =
| width =
| caption =
}}
'''Lacto-N-biosidase''' ({{EC number|3.2.1.140}}) is an [[enzyme]] with system name ''oligosaccharide lacto-N-biosylhydrolase''.<ref>{{cite journal | title = An enzyme releasing lacto-''N''-biose from oligosaccharides |author = Sano, M., Hayakawa, K., Kato, I. |journal = Proc. Natl. Acad. Sci. USA |year = 1992 |volume = 89 |pages = 8512–8516 |pmid = 1528855}}</ref><ref>{{cite journal | title = Purification and characterization of an enzyme releasing lacto-''N''-biose from oligosaccharides with type 1 chain |author = Sano, M., Hayakawa, K., Kato, I. |journal = J. Biol. Chem. |year = 1993 |volume = 268 |pages = 18560–18566 |pmid = 7689556}}</ref> This enzyme [[catalysis|catalyses]] the following [[chemical reaction]]

: (1) beta-D-Gal-(1->3)-beta-D-GlcNAc-(1->3)-beta-D-Gal-(1->4)-D-Glc + H<sub>2</sub>O <math>\rightleftharpoons</math> beta-D-Gal-(1->3)-D-GlcNAc + beta-D-Gal-(1->4)-D-Glc
: (2) lacto-N-tetraose + H<sub>2</sub>O <math>\rightleftharpoons</math> lacto-N-biose + [[lactose]]

The enzyme from ''[[Streptomyces]]'' specifically hydrolyses the terminal lacto-N-biosyl residue (beta-D-Gal-(1->3)-D-GlcNAc) from the non-reducing end of [[oligosaccharides]] with the structure beta-D-Gal-(1->3)-beta-D-GlcNAc-(1->3)-beta-D-Gal-(1->R).

== References ==
{{reflist}}

== External links ==
* {{MeshName|Lacto-N-biosidase}}

[[Category:EC 3.2.1]]

Geometry of binary search trees - Revision history

169.234.235.74: /* Arborally satisfied point sets */