Abstract
Zinc finger proteins containing the Kruppel associated box (KRAB-ZFPs) constitute the largest individual family of transcriptional repressors encoded by the genomes of higher organisms. KRAB domain, positioned at the NH2 terminus of the KRAB-ZFPs, interacts with a scaffold protein, KAP-1, which is able to recruit various transcriptional factors causing repression of genes to which KRAB ZFPs bind. The relevance of such repression is reflected in the large number of the KRAB zinc finger protein genes in the human genome. However, in spite of their numerical abundance little is currently known about the gene targets and the physiological functions of KRAB- ZFPs. However, emerging evidence links the transcriptional repression mediated by the KRAB-ZFPs to cell proliferation, differentiation, apoptosis and cancer. Moreover, the fact that KRAB containing proteins are vertebrate-specific suggests that they have evolved recently, and that their key roles lie in some aspects of vertebrate development. In this review, we will briefly discuss some regulatory functions of the KRAB-ZFPs in different physiological and pathological states, thus contributing to better understand their biological roles.
Keywords: Apoptosis, Evolution, KAP-1 corepressor, KRAB domain, Metabolism, Transcriptional repression, Zinc finger.
Current Genomics
Title:KRAB-Zinc Finger Proteins: A Repressor Family Displaying Multiple Biological Functions
Volume: 14 Issue: 4
Author(s): Angelo Lupo, Elena Cesaro, Giorgia Montano, Diana Zurlo, Paola Izzo and Paola Costanzo
Affiliation:
Keywords: Apoptosis, Evolution, KAP-1 corepressor, KRAB domain, Metabolism, Transcriptional repression, Zinc finger.
Abstract: Zinc finger proteins containing the Kruppel associated box (KRAB-ZFPs) constitute the largest individual family of transcriptional repressors encoded by the genomes of higher organisms. KRAB domain, positioned at the NH2 terminus of the KRAB-ZFPs, interacts with a scaffold protein, KAP-1, which is able to recruit various transcriptional factors causing repression of genes to which KRAB ZFPs bind. The relevance of such repression is reflected in the large number of the KRAB zinc finger protein genes in the human genome. However, in spite of their numerical abundance little is currently known about the gene targets and the physiological functions of KRAB- ZFPs. However, emerging evidence links the transcriptional repression mediated by the KRAB-ZFPs to cell proliferation, differentiation, apoptosis and cancer. Moreover, the fact that KRAB containing proteins are vertebrate-specific suggests that they have evolved recently, and that their key roles lie in some aspects of vertebrate development. In this review, we will briefly discuss some regulatory functions of the KRAB-ZFPs in different physiological and pathological states, thus contributing to better understand their biological roles.
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Cite this article as:
Lupo Angelo, Cesaro Elena, Montano Giorgia, Zurlo Diana, Izzo Paola and Costanzo Paola, KRAB-Zinc Finger Proteins: A Repressor Family Displaying Multiple Biological Functions, Current Genomics 2013; 14 (4) . https://dx.doi.org/10.2174/13892029113149990002
DOI https://dx.doi.org/10.2174/13892029113149990002 |
Print ISSN 1389-2029 |
Publisher Name Bentham Science Publisher |
Online ISSN 1875-5488 |
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