Transcriptional activation and coactivator binding by yeast Ino2 and human proto-oncoprotein c-Myc.

IF 1.8 4区 生物学 Q3 GENETICS & HEREDITY
Eva-Carina Wendegatz, Julia Lettow, Wiktoria Wierzbicka, Hans-Joachim Schüller
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引用次数: 0

Abstract

Basic helix-loop-helix domains in yeast regulatory proteins Ino2 and Ino4 mediate formation of a heterodimer which binds to and activates expression of phospholipid biosynthetic genes. The human proto-oncoprotein c-Myc (Myc) and its binding partner Max activate genes important for cellular proliferation and contain functional domains structure and position of which strongly resembles Ino2 and Ino4. Since Ino2-Myc and Ino4-Max may be considered as orthologs we performed functional comparisons in yeast. We demonstrate that Myc and Max could be stably synthesized in S. cerevisiae and together significantly activated a target gene of Ino2/Ino4 but nevertheless were unable to functionally complement an ino2 ino4 double mutant. We also map two efficient transcriptional activation domains in the N-terminus of Myc (TAD1: aa 1-41 and TAD2: aa 91-140), corresponding to TAD positions in Ino2. We finally show that coactivators such as TFIID subunits Taf1, Taf4, Taf6, Taf10 and Taf12 as well as ATPase subunits of chromatin remodelling complexes Swi2, Sth1 and Ino80 previously shown to interact with TADs of Ino2 were also able to bind TADs of Myc, supporting the view that heterodimers Ino2/Ino4 and Myc/Max are evolutionary related but have undergone transcriptional rewiring of target genes.

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来源期刊
Current Genetics
Current Genetics 生物-遗传学
CiteScore
6.00
自引率
0.00%
发文量
34
审稿时长
1 months
期刊介绍: Current Genetics publishes genetic, genomic, molecular and systems-level analysis of eukaryotic and prokaryotic microorganisms and cell organelles. All articles are peer-reviewed. The journal welcomes submissions employing any type of research approach, be it analytical (aiming at a better understanding), applied (aiming at practical applications), synthetic or theoretical. Current Genetics no longer accepts manuscripts describing the genome sequence of mitochondria/chloroplast of a small number of species. Manuscripts covering sequence comparisons and analyses that include a large number of species will still be considered.
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