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Title: Subunit compositions of Arabidopsis RNA polymerases I and III reveal Pol I- and Pol III-specific forms of the AC40 subunit and alternative forms of the C53 subunit

Abstract

Using affinity purification and mass spectrometry, we identified the subunits of Arabidopsis thaliana multisubunit RNA Polymerases I and III (abbreviated as Pol I and Pol III), providing the first description of their physical compositions in plants. AC40 and AC19 subunits are typically common to Pol I (a.k.a. Pol A) and Pol III (a.k.a. Pol C) and are encoded by single genes whose mutation, in humans, is a cause of the craniofacial disorder, Treacher-Collins Syndrome. Surprisingly, A. thaliana, and related species, express two distinct AC40 paralogs, one of which assembles into Pol I and the other of which assembles into Pol III. Changes at eight amino acid positions correlate with this functional divergence of Pol I and Pol III-specific AC40 paralogs. Two genes encode homologs of the yeast C53 subunit, and either variant can assemble into Pol III. By contrast, only one of two potential C17 variants, and one of two potential C31 variants were detected in Pol III. We introduce a new nomenclature system for plant Pol I and Pol III subunits in which the twelve subunits that are structurally and functionally homologous among Pols I through V are assigned equivalent numbers.

Authors:
; ; ; ; ; ;
Publication Date:
Research Org.:
Pacific Northwest National Laboratory (PNNL), Richland, WA (United States). Environmental Molecular Sciences Laboratory (EMSL)
Sponsoring Org.:
USDOE
OSTI Identifier:
1182913
Report Number(s):
PNNL-SA-108415
Journal ID: ISSN 0305-1048; 48378; 44640; KP1704020
Grant/Contract Number:  
AC05-76RL01830
Resource Type:
Accepted Manuscript
Journal Name:
Nucleic Acids Research
Additional Journal Information:
Journal Volume: 43; Journal Issue: 8; Journal ID: ISSN 0305-1048
Publisher:
Oxford University Press
Country of Publication:
United States
Language:
English
Subject:
59 BASIC BIOLOGICAL SCIENCES; Environmental Molecular Sciences Laboratory

Citation Formats

Ream, Thomas S., Haag, Jeremy R., Pontvianne, Frederic, Nicora, Carrie D., Norbeck, Angela D., Pasa-Tolic, Ljiljana, and Pikaard, Craig S. Subunit compositions of Arabidopsis RNA polymerases I and III reveal Pol I- and Pol III-specific forms of the AC40 subunit and alternative forms of the C53 subunit. United States: N. p., 2015. Web. doi:10.1093/nar/gkv247.
Ream, Thomas S., Haag, Jeremy R., Pontvianne, Frederic, Nicora, Carrie D., Norbeck, Angela D., Pasa-Tolic, Ljiljana, & Pikaard, Craig S. Subunit compositions of Arabidopsis RNA polymerases I and III reveal Pol I- and Pol III-specific forms of the AC40 subunit and alternative forms of the C53 subunit. United States. https://doi.org/10.1093/nar/gkv247
Ream, Thomas S., Haag, Jeremy R., Pontvianne, Frederic, Nicora, Carrie D., Norbeck, Angela D., Pasa-Tolic, Ljiljana, and Pikaard, Craig S. Sat . "Subunit compositions of Arabidopsis RNA polymerases I and III reveal Pol I- and Pol III-specific forms of the AC40 subunit and alternative forms of the C53 subunit". United States. https://doi.org/10.1093/nar/gkv247. https://www.osti.gov/servlets/purl/1182913.
@article{osti_1182913,
title = {Subunit compositions of Arabidopsis RNA polymerases I and III reveal Pol I- and Pol III-specific forms of the AC40 subunit and alternative forms of the C53 subunit},
author = {Ream, Thomas S. and Haag, Jeremy R. and Pontvianne, Frederic and Nicora, Carrie D. and Norbeck, Angela D. and Pasa-Tolic, Ljiljana and Pikaard, Craig S.},
abstractNote = {Using affinity purification and mass spectrometry, we identified the subunits of Arabidopsis thaliana multisubunit RNA Polymerases I and III (abbreviated as Pol I and Pol III), providing the first description of their physical compositions in plants. AC40 and AC19 subunits are typically common to Pol I (a.k.a. Pol A) and Pol III (a.k.a. Pol C) and are encoded by single genes whose mutation, in humans, is a cause of the craniofacial disorder, Treacher-Collins Syndrome. Surprisingly, A. thaliana, and related species, express two distinct AC40 paralogs, one of which assembles into Pol I and the other of which assembles into Pol III. Changes at eight amino acid positions correlate with this functional divergence of Pol I and Pol III-specific AC40 paralogs. Two genes encode homologs of the yeast C53 subunit, and either variant can assemble into Pol III. By contrast, only one of two potential C17 variants, and one of two potential C31 variants were detected in Pol III. We introduce a new nomenclature system for plant Pol I and Pol III subunits in which the twelve subunits that are structurally and functionally homologous among Pols I through V are assigned equivalent numbers.},
doi = {10.1093/nar/gkv247},
journal = {Nucleic Acids Research},
number = 8,
volume = 43,
place = {United States},
year = {Sat May 02 00:00:00 EDT 2015},
month = {Sat May 02 00:00:00 EDT 2015}
}

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Cited by: 16 works
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Treacle recruits RNA polymerase I complex to the nucleolus that is independent of UBF
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SAD1, an RNA polymerase I subunit A34.5 of rice, interacts with Mediator and controls various aspects of plant development
journal, December 2014

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Works referencing / citing this record:

A partial loss-of-function mutation in an Arabidopsis RNA polymerase III subunit leads to pleiotropic defects
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A partial loss-of-function mutation in an Arabidopsis RNA polymerase III subunit leads to pleiotropic defects
journal, February 2016

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