The FOXO’s Advantages of Being a Family: Considerations on Function and Evolution

The nematode <i>Caenorhabditis elegans</i> possesses a unique (with various isoforms) FOXO transcription factor DAF-16, which is notorious for its role in aging and its regulation by the insulin-PI3K-AKT pathway. In humans, five genes (including a protein-coding pseudogene) encode for FO...

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Main Author: Michel Schmitt-Ney
Format: Article
Language:English
Published: MDPI AG 2020-03-01
Series:Cells
Subjects:
Online Access:https://www.mdpi.com/2073-4409/9/3/787
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author Michel Schmitt-Ney
author_facet Michel Schmitt-Ney
author_sort Michel Schmitt-Ney
collection DOAJ
description The nematode <i>Caenorhabditis elegans</i> possesses a unique (with various isoforms) FOXO transcription factor DAF-16, which is notorious for its role in aging and its regulation by the insulin-PI3K-AKT pathway. In humans, five genes (including a protein-coding pseudogene) encode for FOXO transcription factors that are targeted by the PI3K-AKT axis, such as in <i>C. elegans</i>. This common regulation and highly conserved DNA-binding domain are the pillars of this family. In this review, I will discuss the possible meaning of possessing a group of very similar proteins and how it can generate additional functionality to more complex organisms. I frame this discussion in relation to the much larger super family of Forkhead proteins to which they belong. FOXO members are very often co-expressed in the same cell type. The overlap of function and expression creates a certain redundancy that might be a safeguard against the accidental loss of FOXO function, which could otherwise lead to disease, particularly, cancer. This is one of the points that will be examined in this &#8220;family affair&#8221; report.
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spelling doaj.art-7c207e677c3d4dea87f5e564b41bd2ed2023-09-02T22:55:45ZengMDPI AGCells2073-44092020-03-019378710.3390/cells9030787cells9030787The FOXO’s Advantages of Being a Family: Considerations on Function and EvolutionMichel Schmitt-Ney0Molecular Biotechnology Center, University of Torino, Via Nizza 52, 10126 Torino, ItalyThe nematode <i>Caenorhabditis elegans</i> possesses a unique (with various isoforms) FOXO transcription factor DAF-16, which is notorious for its role in aging and its regulation by the insulin-PI3K-AKT pathway. In humans, five genes (including a protein-coding pseudogene) encode for FOXO transcription factors that are targeted by the PI3K-AKT axis, such as in <i>C. elegans</i>. This common regulation and highly conserved DNA-binding domain are the pillars of this family. In this review, I will discuss the possible meaning of possessing a group of very similar proteins and how it can generate additional functionality to more complex organisms. I frame this discussion in relation to the much larger super family of Forkhead proteins to which they belong. FOXO members are very often co-expressed in the same cell type. The overlap of function and expression creates a certain redundancy that might be a safeguard against the accidental loss of FOXO function, which could otherwise lead to disease, particularly, cancer. This is one of the points that will be examined in this &#8220;family affair&#8221; report.https://www.mdpi.com/2073-4409/9/3/787foxotranscriptiongene familypi3kaktinsulin pathwaytumor suppressorcanceraginggene duplicationgenetic redundancyevolutionfoxforkheadmetabolism
spellingShingle Michel Schmitt-Ney
The FOXO’s Advantages of Being a Family: Considerations on Function and Evolution
Cells
foxo
transcription
gene family
pi3k
akt
insulin pathway
tumor suppressor
cancer
aging
gene duplication
genetic redundancy
evolution
fox
forkhead
metabolism
title The FOXO’s Advantages of Being a Family: Considerations on Function and Evolution
title_full The FOXO’s Advantages of Being a Family: Considerations on Function and Evolution
title_fullStr The FOXO’s Advantages of Being a Family: Considerations on Function and Evolution
title_full_unstemmed The FOXO’s Advantages of Being a Family: Considerations on Function and Evolution
title_short The FOXO’s Advantages of Being a Family: Considerations on Function and Evolution
title_sort foxo s advantages of being a family considerations on function and evolution
topic foxo
transcription
gene family
pi3k
akt
insulin pathway
tumor suppressor
cancer
aging
gene duplication
genetic redundancy
evolution
fox
forkhead
metabolism
url https://www.mdpi.com/2073-4409/9/3/787
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