NDLI: The PB1 Domain in Auxin Response Factor and Aux/IAA Proteins: A Versatile Protein Interaction Module in the Auxin Response

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The PB1 Domain in Auxin Response Factor and Aux/IAA Proteins: A Versatile Protein Interaction Module in the Auxin Response

Content Provider	World Health Organization (WHO)-Global Index Medicus
Author	Guilfoyle, Tom J.
Description	Author Affiliation: Guilfoyle TJ ( Department of Biochemistry, University of Missouri, Columbia, Missouri 65211 guilfoylet@missouri.edu.)
Abstract	An integral part of auxin-regulated gene expression involves the interplay of two types of transcription factors, the DNA binding auxin response factor (ARF) activators and the interacting auxin/indole acetic acid (Aux/IAA) repressors. Insight into the mechanism of how these transcription factors interact with one another has recently been revealed from crystallographic information on ARF5 and ARF7 C-terminal domains (i.e., a protein-protein interaction domain referred to as domain III/IV that is related to domain III/IV in Aux/IAA proteins). Three-dimensional structures showed that this domain in ARF5 and ARF7 conforms to a well-known PB1 (Phox and Bem1) domain that confers protein-protein interactions with other PB1 domain proteins through electrostatic contacts. Experiments verifying the importance of charged amino acids in conferring ARF and Aux/IAA interactions have confirmed the PB1 domain structure. Some in planta experiments designed to test the validity of PB1 interactions in the auxin response have led to updated models for auxin-regulated gene expression and raised many questions that will require further investigation. In addition to the PB1 domain, a second protein interaction module that functions in ARF-ARF dimerization and facilitates DNA binding has recently been revealed from crystallography studies on the ARF1 and ARF5 DNA binding domains.
File Format	HTM / HTML
ISSN	10404651
e-ISSN	1531298X
DOI	10.1105/tpc.114.132753
Journal	THE PLANT CELL ONLINE
Issue Number	1
Volume Number	27
Language	English
Publisher	American Society of Plant Biologists
Publisher Date	2015-01-01
Publisher Place	United States
Access Restriction	Open
Subject Keyword	Discipline Botany Indoleacetic Acids Metabolism Transcription Factors Gene Expression Regulation, Plant Physiology Plant Proteins Genetics Protein Binding Protein Interaction Domains And Motifs Signal Transduction Research Support, Non-u.s. Gov't
Content Type	Text
Resource Type	Article
Subject	Cell Biology Plant Science

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The PB1 Domain in Auxin Response Factor and Aux/IAA Proteins: A Versatile Protein Interaction Module in the Auxin Response [OPEN]

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The PB1 Domain in Auxin Response Factor and Aux/IAA Proteins: A Versatile Protein Interaction Module in the Auxin Response

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The PB1 Domain in Auxin Response Factor and Aux/IAA Proteins: A Versatile Protein Interaction Module in the Auxin Response