Agm1/Pgm-3-mediated sugar nucleotide synthesis is essential for hematopoiesis and development
Details
Publication Year 2007-08,Volume 27,Issue #16,Page 5849-5859
Journal Title
MOLECULAR AND CELLULAR BIOLOGY
Publication Type
Journal Article
Abstract
Carbohydrate modification of proteins includes N-linked and O-linked glycosylation, proteoglycan formation, glycosylphosphatidylinositol anchor synthesis, and O-GIcNAc modification. Each of these modifications requires the sugar nucleotide UDP-GlcNAc, which is produced via the hexosamine biosynthesis pathway. A key step in this pathway is the interconversion of GicNAc-6-phosphate (GlcNAc-6-P) and GlcNAc-1-P, catalyzed by phosphoglucomutase 3 (Pgm3). In this paper, we describe two hypomorphic alleles of mouse Pgm3 and show there are specific physiological consequences of a graded reduction in Pgm3 activity and global UDP-GlcNAc levels. Whereas mice lacking Pgm3 die prior to implantation, animals with less severe reductions in enzyme activity are sterile, exhibit changes in pancreatic architecture, and are anemic, leukopenic, and thrombocytopenic. These phenotypes are accompanied by specific rather than wholesale changes in protein glycosylation, suggesting that while universally required, the functions of certain proteins and, as a consequence, certain cell types are especially sensitive to reductions in Pgm3 activity.
Publisher
AMER SOC MICROBIOLOGY
Keywords
ANGIOTENSIN-CONVERTING ENZYME; ACETYLGLUCOSAMINE-PHOSPHATE MUTASE; PROTEIN-LOSING ENTEROPATHY; O-GLCNAC TRANSFERASE; MICE LACKING; BLOOD-PRESSURE; MALE-FERTILITY; C-MPL; GENE; MOUSE
Terms of Use/Rights Notice
Refer to copyright notice on published article.


Creation Date: 2007-08-01 12:00:00
An error has occurred. This application may no longer respond until reloaded. Reload 🗙