In the yeast Saccharomyces cerevisiae, the MADS-box protein Mcm1, which is highly related to mammalian SRF (serum response factor), forms a ternary complex with SFF (Swi five factor) to regulate the cell cycle expression of genes such as SWI5, CLB2 and ACE2. Here we show that the forkhead protein Fkh2 is a component of SFF and is essential for ternary complex formation on the SWI5 and ACE2 promoters. Fkh2 is essential for the correct cell cycle periodicity of SWI5 and CLB2 gene expression and is phosphorylated with a timing that is consistent with a role in this expression. Furthermore, investigation of the relationship between Fkh2 and a related forkhead protein Fkh1 demonstrates that these proteins act in overlapping pathways to regulate cell morphology and cell separation. This is the first example of a eukaryotic transcription factor complex containing both a MADS-box and a forkhead protein, and it has important implications for the regulation of mammalian gene expression.

Download full-text PDF

Source
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC313965PMC
http://dx.doi.org/10.1093/emboj/19.14.3750DOI Listing

Publication Analysis

Top Keywords

forkhead protein
16
cell cycle
12
protein fkh2
8
fkh2 component
8
transcription factor
8
ternary complex
8
regulate cell
8
swi5 clb2
8
gene expression
8
cell
5

Similar Publications

Introduction: Ulcerative colitis (UC) is a chronic inflammatory disease. Patients with UC typically exhibit disruption of the Treg/Th17 immune axis, but its exact mechanism is still unclear.

Methods: This study first analyzed RNA- seq data from public databases of humans and mice, and cytology experiments were conducted to induce or inhibit the expression of SIRT1.

View Article and Find Full Text PDF

Cancer, a leading cause of global mortality, remains a significant challenge to increasing life expectancy worldwide. Forkhead Box R2 (FOXR2), identified as an oncogene within the FOX gene family, plays a crucial role in developing various endoderm-derived organs. Recent studies have elucidated FOXR2-related pathways and their involvement in both tumor and non-tumor diseases.

View Article and Find Full Text PDF

Age-related cataracts (ARCs) are associated with increased oxidative stress and cellular senescence. Our objective is to investigate the function of Sirtuin 1 (SIRT1) within ARCs. In ARCs tissues and HO-treated lens epithelial cells (LECs), the expression levels of SIRT1 were examined.

View Article and Find Full Text PDF

FOXS1, frequently inactivated by promoter methylation, inhibited colorectal cancer cell growth by promoting TGFBI degradation through autophagy-lysosome pathway.

J Adv Res

January 2025

Biomedical Research Center, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou 310016 Zhejiang, China; Department of Pathology, Sir Run Run Shaw Hospital, Zhejiang University, Hangzhou 310016 Zhejiang, China. Electronic address:

Introduction: Tumor suppressor gene (TSG) inactivation by epigenetic modifications contributes to the carcinogenesis and progression of colorectal cancer (CRC). Expression profiling and CpG methylomics revealed that a forkhead-box transcriptional factor, FOXS1, is downregulated and methylated in CRC.

Objectives: To assess the biological functions and underlying mechanisms of FOXS1 in colorectal cancer.

View Article and Find Full Text PDF

Pan-Cancer Upregulation of the Transcription Factor.

Genes (Basel)

January 2025

Department of Pharmacy and Biotechnology, University of Bologna, 40138 Bologna, Italy.

Background: The human transcription factor controls cell cycle progression and genome stability, and it has been correlated to the onset and progression of many tumor types.

Methods: In our study, we collected all recent sequence and quantitative transcriptomics data about , testing its presence across vertebrate evolution and its upregulation in cancer, both in bulk tissue contexts (by comparing the TCGA tumor dataset and the GTEx normal tissue dataset) and in single-cell contexts.

Results: is significantly and consistently upregulated in all tested tumor types, as well as in tumor cells within a cancer microenvironment.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!