Characterization of Mouse tGolgin-1 (Golgin-245/trans-Golgi p230/256 kD Golgin) and Its Upregulation during Oligodendrocyte Development

Cowan, David A.; Gay, Denise; Bieler, Bert M.; Zhao, Huizhen; Yoshino, Atsuko; Davis, James G.; Tomayko, Mary M.; Murali, Ramachandran; Greene, Mark I.; Marks, Michael S.
July 2002
DNA & Cell Biology;Jul2002, Vol. 21 Issue 7, p505
Academic Journal
As part of an effort to identify gene products that are differentially regulated during oligodendrocyte development, we isolated a mouse cDNA that encodes tGolgin-1, a homolog of the human protein known as golgin-245, trans-golgi p230, or 256 kD golgin. Human tGolgin-1 is the target of autoantibodies in patients with Sj�gren's syndrome, and is thought to be involved in vesicular transport processes at the trans-Golgi network. Sequencing of cDNAs and EST clones comprising the full-length tGolgin-1 transcript predict marked homology with the amino- and carboxy-terminal regions of the human protein, but more limited homology within the central predicted coiled-coil region. Epitope tagged, truncated forms of mouse tGolgin-1, like those of its human homolog, were localized at steady state to the Golgi/trans-Golgi network in transfected cells. The tGolgin-1 message was expressed in all tissues examined, but was highly upregulated in oligodendrocyte precursors at a stage just prior to myelination. This expression pattern suggests that tGolgin-1 may play a role in specialized transport processes associated with maturation and/or differentiation of oligodendrocyte precursors.


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