First published online December 20, 2005
Development 133, 202e (2006)
© The Company of Biologists Limited
New COGs in the organogenesis wheel
Congenital disorder of glycosylation (CDG) causes multiple developmental
abnormalities in humans. To investigate the role of glycosylation and the
Golgi (the principle site of glycosylation) in organogenesis, Nishiwaki and
co-workers turned to the worm gonad. On
p. 263, they report the
cloning of two genes that, when mutated, cause worms to phenotypically
resemble mig-17 mutants; mig-17 codes for an ADAM protease
that is implicated in gonadal development. The two identified genes -
cogc-1 and cogc-3 - encode homologues of members of the
conserved oligomeric Golgi (COG) complex, which is involved in CDG, and in
vesicle trafficking to, from and within the Golgi. Mutant analysis shows that
these genes are needed for proper MIG-17 glycosylation and gonad formation,
possibly together with other COG components. Although the mechanisms linking
the COG complex to CDG are still unclear, the worm gonad should be a useful
model for studying the roles of glycosylation in
organogenesis.

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Development 2006 133: 263-273.
[Abstract]
[Full Text]