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Chapter category: Gene Expression

A New Member of the CtBP/BARS Family from Plants: Angustifolia

This chapter appears in the following book:

CtBP Family Proteins

Edited by: G. Chinnadurai
ISBN: 0-387-39971-2
» Get more information about this book at landesbioscience.com «

Chapter authors:
Hirozaku Tsukaya


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The ANGUSTIFOLIA (AN) gene in Arabidopsis thaliana (L.) Heynh. is the first \r\nhomolog of the CtBP/BARS gene family identified in plants and is responsible for the polarity-dependent control of leaf cell expansion. This review compares the sequence homology and functional similarity of the AN protein with authentic animal CtBP/BARS family proteins. AN homologs have been found in both angiosperms and mosses, suggesting AN is conserved in terrestrial plant genomes. The AN subfamily is unique in having not only the D-isomer-specific 2-hydroxy acid dehydrogenase (D2-HDH) motif that is conserved among the CtBP/BARS family but also putative LxCxE/D and nuclear localization signal (NLS) motifs and a long C-terminal region. The absence of the catalytic triad, which is conserved in all D2-HDH sequences and is believed to be essential for the corepression activity of CtBP, suggests that AN might differ, at least in part, from CtBPs in molecular function. In addition, the distribution and density of the Golgi apparatus is normal in a null allele of the an mutant, suggesting that AN might not have a BARS function. An analysis of cytoskeletons in an mutant leaf cells suggests that AN might play an important role in controlling the arrangement of cortical microtubules that is plant-specific cytoskeletons. With all these attributes, AN appears to be the third member of an enigmatic family, CBA = CtBP/BARS/AN, which regulates aspects of developmental and organelle control in animals and plants.

Hirozaku Tsukaya
Okazaki Institute for Integrative Bioscience, National Institute for Basic Biology, Japan Graduate University for Advanced Studies

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Additional chapters from this book:

A New Member of the CtBP/BARS Family from Plants: Angustifolia

Hirozaku Tsukaya

The ANGUSTIFOLIA (AN) gene in Arabidopsis thaliana (L.) Heynh. is the first \r\nhomolog of the CtBP/BARS gene family identified in plants and is responsible for the polarity-dependent control of leaf ...

CtBP Family Proteins: Unique Transcriptional Regulators in the Nucleus with Diverse Cytosolic Functions

G. Chinnadurai

CtBP family proteins are unique in animals and in plants. The invertebrates and plants contain a single CtBP family gene while vertebrates have two genes. Genetic studies in Drosophila and in mice ind...

CtBP Corepressor Complex - A Multi-Enzyme Machinery that Coordinates Chromatin Modifications

Recent biochemical and proteomic approach has identified a CtBP super complex consisting of a host of chromatin modifying enzymes. Analysis of this complex has led to the appreciation that enzymes tha...

The Significance of the CtBP: AdE1A Interaction during Viral Infection and Transformation

Roger J.A. Grand, Claire Baker, Paola M. Barral, Rachel K. Bruton, Julian Parkhill, Tadge Szestak and Philip H. Gallimore

C-terminal binding protein (CtBP) associates with adenovirus early region 1A (AdE1A) proteins through a highly conserved PXDLS motif located very close to its C-terminus in conserved region 4. To try ...

CtBP Proteins in Vertebrate Development

Jeffrey D. Hildebrand

The fundamental question facing developmental biology is how the diversity of cell and tissue types that comprise a vertebrate organism can be generated from a single fertilized egg. A critical aspect...

CtBPs as Synaptic Proteins

Susanne tom Dieck, Frank Schmitz and Johann Helmut Brandstätter

A surprising new aspect of CtBP family proteins arose from the identification of a novel CtBP protein named RIBEYE.1 RIBEYE, which consists of a unique amino-terminal A-domain and a carboxy-terminal B...

CtBP3/BARS and Membrane Fission

Stefania Spanò, Cristina Hidalgo Carcedo and Daniela Corda

CtBP3/BARS was the third protein of the CtBP (C-terminal binding protein) family to be identified. It was initially isolated as a 50-kDa cytosolic protein during the characterisation of the molecular ...

CtBP: A Link between Apoptosis and the Epithelial-Mesenchymal Transition

Steven M. Frisch

Adenovirus E1a proteins are potent and ubiquitously acting tumor suppressors in human tumor cells. Through interaction with CtBP (as well as other mechanisms), E1a protein sensitizes cells to several ...

CtBP and Hematopoietic Transcriptional Regulators

Alexis Verger, Jose Perdomo and Merlin Crossley

The C-terminal binding proteins (CtBPs) are ubiquitous corepressors that recruit histone-modifying enzymes to a variety of sequence specific DNA-binding proteins and other transcriptional regulators. ...

CtBP as a Redox Sensor in Transcriptional Repression

Qinghong Zhang, Clark C. Fjeld, Amanda C. Nottke and Richard H. Goodman

The corepressor CtBP (carboxyl-terminal binding protein) is involved in transcriptional pathways important for development, cell cycle regulation, and transformation. We demonstrate that CtBP binding ...

Transcriptional Repression by the CtBP Corepressor in Drosophila

Hitoshi Aihara, Lorena Perrone and Yutaka Nibu

Transcriptional repression is essential for patterning gene expression in the early Drosophila embryo. Biochemical and genetic studies on Drosophila C-terminal binding protein (dCtBP) have provided so...

Structural Determinants of CtBP Function

James R. Lundblad

The structural characteristics of the CtBP family of transcriptional corepressors suggest an additional role for coenzyme nicotinamide adenine dinucleotide in the repression of gene expression. Remark...


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