Format

Send to

Choose Destination
Dev Biol. 2011 Feb 15;350(2):311-22. doi: 10.1016/j.ydbio.2010.11.033. Epub 2010 Dec 11.

Regulation of mouse oocyte microtubule and organelle dynamics by PADI6 and the cytoplasmic lattices.

Author information

1
Baker Institute for Animal Health, Cornell University, Ithaca, NY 14853, USA.

Abstract

Organelle positioning and movement in oocytes is largely mediated by microtubules (MTs) and their associated motor proteins. While yet to be studied in germ cells, cargo trafficking in somatic cells is also facilitated by specific recognition of acetylated MTs by motor proteins. We have previously shown that oocyte-restricted PADI6 is essential for formation of a novel oocyte-restricted fibrous structure, the cytoplasmic lattices (CPLs). Here, we show that α-tubulin appears to be associated with the PADI6/CPL complex. Next, we demonstrate that organelle positioning and redistribution is defective in PADI6-null oocytes and that alteration of MT polymerization or MT motor activity does not induce organelle redistribution in these oocytes. Finally, we report that levels of acetylated microtubules are dramatically suppressed in the cytoplasm of PADI6-null oocytes, suggesting that the observed organelle redistribution failure is due to defects in stable cytoplasmic MTs. These results demonstrate that the PADI6/CPL superstructure plays a key role in regulating MT-mediated organelle positioning and movement.

PMID:
21147087
PMCID:
PMC3031771
DOI:
10.1016/j.ydbio.2010.11.033
[Indexed for MEDLINE]
Free PMC Article

Supplemental Content

Full text links

Icon for Elsevier Science Icon for PubMed Central
Loading ...
Support Center