Please use this identifier to cite or link to this item: http://hdl.handle.net/2440/77441
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Type: Journal article
Title: Poor homologous synapsis 1 interacts with chromatin but does not colocalise with ASYnapsis 1 during early meiosis in bread wheat
Author: Khoo, K.
Able, A.
Able, J.
Citation: International Journal of Plant Genomics, 2012; 2012(514398):1-11
Publisher: Hindawi Publishing Corporation
Issue Date: 2012
ISSN: 1687-5389
1687-5389
Statement of
Responsibility: 
Kelvin H. P. Khoo, Amanda J. Able, and Jason A. Able
Abstract: Chromosome pairing, synapsis, and DNA recombination are three key processes that occur during early meiosis. A previous study of Poor Homologous Synapsis 1 (PHS1) in maize suggested that PHS1 has a role in coordinating these three processes. Here we report the isolation of wheat (Triticum aestivum) PHS1 (TaPHS1), and its expression profile during and after meiosis. While the TaPHS1 protein has sequence similarity to other plant PHS1/PHS1-like proteins, it also possesses a unique region of oligopeptide repeat units. We show that TaPHS1 interacts with both single- and double-stranded DNA in vitro and provide evidence of the protein region that imparts the DNA-binding ability. Immunolocalisation data from assays conducted using antisera raised against TaPHS1 show that TaPHS1 associates with chromatin during early meiosis, with the signal persisting beyond chromosome synapsis. Furthermore, TaPHS1 does not appear to colocalise with the asynapsis protein (TaASY1) suggesting that these proteins are probably independently coordinated. Significantly, the data from the DNA-binding assays and 3-dimensional immunolocalisation of TaPHS1 during early meiosis indicates that TaPHS1 interacts with DNA, a function not previously observed in either the Arabidopsis or maize PHS1 homologues. As such, these results provide new insight into the function of PHS1 during early meiosis in bread wheat.
Description: Extent: 11p.
Rights: Copyright © 2012 Kelvin H. P. Khoo et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.
RMID: 0020126893
DOI: 10.1155/2012/514398
Appears in Collections:Agriculture, Food and Wine publications

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