Abstract:
:Cells in a variety of developmental contexts sense extracellular cues that are given locally on their surfaces, and subsequently amplify the initial signal to achieve cell polarization. Drosophila wing cells acquire planar polarity along the proximal-distal (P-D) axis, in which the amplification of the presumptive cue involves assembly of a multiprotein complex that spans distal and proximal boundaries of adjacent cells. Here we pursue the mechanisms that place one of the components, Frizzled (Fz), at the distal side. Intracellular particles of GFP-tagged Fz moved preferentially toward distal boundaries before Fz::GFP and other components were tightly localized at the P/D cortex. Arrays of microtubules (MTs) were approximately oriented along the P-D axis and these MTs contributed to the formation of the cortical complex. Furthermore, there appeared to be a bias in the P-D MTs, with slightly more plus ends oriented distally. The hypothesis of polarized vesicular trafficking of Fz is discussed.
journal_name
Dev Celljournal_title
Developmental cellauthors
Shimada Y,Yonemura S,Ohkura H,Strutt D,Uemura Tdoi
10.1016/j.devcel.2005.11.016keywords:
subject
Has Abstractpub_date
2006-02-01 00:00:00pages
209-22issue
2eissn
1534-5807issn
1878-1551pii
S1534-5807(05)00476-4journal_volume
10pub_type
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