Format

Send to

Choose Destination
Dev Cell. 2011 Jan 18;20(1):60-71. doi: 10.1016/j.devcel.2010.11.008.

KIF16B/Rab14 molecular motor complex is critical for early embryonic development by transporting FGF receptor.

Author information

1
Department of Cell Biology and Anatomy, Graduate School of Medicine, University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan.

Abstract

Kinesin-mediated membrane trafficking is a fundamental cellular process, but its developmental relevance is little understood. Here we show that the kinesin-3 motor KIF16B/Rab14 complex acts in biosynthetic Golgi-to-endosome traffic of the fibroblast growth factor receptor (FGFR) during early embryonic development. Kif16b(-/-) mouse embryos failed in developing epiblast and primitive endoderm lineages and died in the peri-implantation stage, similar to previously reported FGFR2 knockout embryos. KIF16B associated directly with the Rab14-GTP adaptor on FGFR-containing vesicles and transported them toward the plasma membrane. To examine whether the nucleotide state of Rab14 serves as a switch for transport, we performed Rab14-GDP overexpression. This dominant negative approach reproduced the whole putative sequence of KIF16B or FGFR2 deficiency: impairment in FGFR transport, FGF signaling, basement membrane assembly by the primitive endoderm lineage, and epiblast development. These data provide one of the first pieces of genetic evidence that microtubule-based membrane trafficking directly promotes early development.

PMID:
21238925
DOI:
10.1016/j.devcel.2010.11.008
[Indexed for MEDLINE]
Free full text

Supplemental Content

Full text links

Icon for Elsevier Science
Loading ...
Support Center