Phosphate starvation-response transcription factor gene transcriptions

Associate Editor(s)-in-Chief: Henry A. Hoff

One phosphate starvation-response transcription factor is Pho4.

Human genes

Consensus sequences

"The [palindromic E-box motif (CACGTG)] motif is bound by the transcription factor Pho4, [and has the] class of basic helix-loop-helix DNA binding domain and core recognition sequence (Zhou and O'Shea 2011)."^[1]

"Pho4 bound to virtually all E-boxes in vitro (96%) [...]. That was not the case in vivo, where only 5% were bound by Pho4, under activating conditions as determined by ChIP-seq [Zhou and O'Shea 2011]."^[1]

"Pho4 possesses the intrinsic ability to bind every E-box, but in vivo is prevented from binding by chromatin unless assisted by chromatin remodelers (Svaren et al. 1994) that are targeted at promoter regions."^[1]

"On one end of that spectrum, typical transcription factors like Pho4 do not appear to compete with nucleosomes and instead predominantly sample motifs that already exist in the [nucleosome-free promoter regions] NFRs generated by other factors. In vitro (PB-exo), Pho4 bound nearly every instance of an E-box motif across the yeast genome. However, in vivo, Pho4 is a low-abundance protein that is recruited to the nucleus upon phosphate starvation by other factors, to act at a few dozen genes (Komeili and O'Shea 1999; Zhou and O'Shea 2011). Since Pho4 appears unable to compete with nucleosomes, competent sites that are occluded by nucleosomes are invisible to Pho4."^[1]

The Pho4 homodimer binds to DNA sequences containing the bHLH binding site 5'-CACGTG-3'.^[2]

The upstream activating sequence (UAS) for Pho4p is 5'-CAC(A/G)T(T/G)-3' in the promoters of HIS4 and PHO5 regarding phosphate limitation with respect to regulation of the purine and histidine biosynthesis pathways [66].^[3]

Samplings

Copying the apparent consensus sequence for the Pho (CACGTG) and putting it in "⌘F" finds none located between ZSCAN22 or one between ZNF497 and A1BG as can be found by the computer programs.

References

↑ ^1.0 ^1.1 ^1.2 ^1.3 Matthew J. Rossi, William K.M. Lai and B. Franklin Pugh (21 March 2018). "Genome-wide determinants of sequence-specific DNA binding of general regulatory factors". Genome Research. 28: 497–508. doi:10.1101/gr.229518.117. PMID 29563167. Retrieved 31 August 2020.
↑ Dalei Shao, Caretha L. Creasy, Lawrence W. Bergman (1 February 1998). "A cysteine residue in helixII of the bHLH domain is essential for homodimerization of the yeast transcription factor Pho4p". Nucleic Acids Research. 26 (3): 710–4. doi:10.1093/nar/26.3.710. PMC 147311. PMID 9443961.
↑ Hongting Tang, Yanling Wu, Jiliang Deng, Nanzhu Chen, Zhaohui Zheng, Yongjun Wei, Xiaozhou Luo, and Jay D. Keasling (6 August 2020). "Promoter Architecture and Promoter Engineering in Saccharomyces cerevisiae". Metabolites. 10 (8): 320–39. doi:10.3390/metabo10080320. PMID 32781665 Check |pmid= value (help). Retrieved 18 September 2020.

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Phosphate starvation-response transcription factor gene transcriptions

Contents

Human genes

Consensus sequences

Samplings

See also

References

External links

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