Get 20M+ Full-Text Papers For Less Than $1.50/day. Start a 14-Day Trial for You or Your Team.

Learn More →

Galactokinase: structure, function and role in type II galactosemia

Galactokinase: structure, function and role in type II galactosemia The conversion of beta-D-galactose to glucose 1-phosphate is accomplished by the action of four enzymes that constitute the Leloir pathway. Galactokinase catalyzes the second step in this pathway, namely the conversion of alpha-D-galactose to galactose 1-phosphate. The enzyme has attracted significant research attention because of its important metabolic role, the fact that defects in the human enzyme can result in the diseased state referred to as galactosemia, and most recently for its utilization via ‘directed evolution’ to create new natural and unnatural sugar 1-phosphates. Additionally, galactokinase-like molecules have been shown to act as sensors for the intracellular concentration of galactose and, under suitable conditions, to function as transcriptional regulators. This review focuses on the recent X-ray crystallographic analyses of galactokinase and places the molecular architecture of this protein in context with the extensive biochemical data that have accumulated over the last 40 years regarding this fascinating small molecule kinase. http://www.deepdyve.com/assets/images/DeepDyve-Logo-lg.png Cellular and Molecular Life Sciences Springer Journals

Galactokinase: structure, function and role in type II galactosemia

Loading next page...
 
/lp/springer-journals/galactokinase-structure-function-and-role-in-type-ii-galactosemia-0CWkUlxGnm

References (95)

Publisher
Springer Journals
Copyright
Copyright © 2004 by Birkhäuser Verlag, Basel
Subject
Life Sciences; Biomedicine general; Life Sciences, general; Biochemistry, general; Cell Biology
ISSN
1420-682X
eISSN
1420-9071
DOI
10.1007/s00018-004-4160-6
pmid
15526155
Publisher site
See Article on Publisher Site

Abstract

The conversion of beta-D-galactose to glucose 1-phosphate is accomplished by the action of four enzymes that constitute the Leloir pathway. Galactokinase catalyzes the second step in this pathway, namely the conversion of alpha-D-galactose to galactose 1-phosphate. The enzyme has attracted significant research attention because of its important metabolic role, the fact that defects in the human enzyme can result in the diseased state referred to as galactosemia, and most recently for its utilization via ‘directed evolution’ to create new natural and unnatural sugar 1-phosphates. Additionally, galactokinase-like molecules have been shown to act as sensors for the intracellular concentration of galactose and, under suitable conditions, to function as transcriptional regulators. This review focuses on the recent X-ray crystallographic analyses of galactokinase and places the molecular architecture of this protein in context with the extensive biochemical data that have accumulated over the last 40 years regarding this fascinating small molecule kinase.

Journal

Cellular and Molecular Life SciencesSpringer Journals

Published: Jan 1, 2004

There are no references for this article.