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. 2009 Dec 3;38(4):1228–1239. doi: 10.1093/nar/gkp1102

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© The Author(s) 2009. Published by Oxford University Press.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/2.5), which permits unrestricted non-commercial use, distribution, and reproduction in any medium, provided the original work is properly cited.

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Figure 7. — Models to explain the presence of Dr1 at TATA-less pol III templates. (A) The TFIIIB subunit Bdp1 might provide interactions with TBP that allow it to be retained at promoters when Dr1 disrupts its interface with Brf1. (B) Dr1 might be able to bind Brf1 in a manner that is compatible with transcription. Transfer of Dr1 to TBP might disrupt the TBP/Brf1 interface and repress transcription. Such transfer might be triggered by changes in post-translational modification; a hypothetical dephosphosphorylation of Dr1 is illustrated as an example. P denotes protein phosphorylation.