The POU transcription factor UNC-86 controls the timing and ventral guidance of Caenorhabditis elegans axon growth.
The POU transcription factor UNC-86 controls the timing and ventral guidance of Caenorhabditis elegans axon growth.
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DOI:
10.1002/dvdy.22667
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发表时间:
2011-07
影响因子:
2.5
通讯作者:
Slack, Frank J.
中科院分区:
文献类型:
--
作者:
Olsson-Carter, Katherine;Slack, Frank J.
The in vivo mechanisms that coordinate the timing of axon growth and guidance are not well understood. In the C. elegans hermaphrodite specific neurons, the lin-4 microRNA controls the stage of axon initiation independent of the UNC-40 and SAX-3 ventral guidance receptors. lin-4 loss-of-function mutants exhibit marked delays in axon outgrowth, while lin-4 overexpression, leads to precocious growth in the L3. Here we show that loss of the POU transcription factor UNC-86 not only results in penetrant ventral axon growth defects in the HSNs, but also causes processes to extend in the L1, three stages earlier than wild-type. This temporal shift is not dependent on UNC-40 or SAX-3, and does not require the presence of lin-4. We propose that unc-86(lf) HSN axons are misguided due to the temporal decoupling of axon initiation and ventral guidance responses.
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