Abstract
Two distinct pathways for meiotic crossover formation coexist in most eukaryotes. The Arabidopsis SHOC1 protein is required for class I crossovers and shows sequence similarity with the XPF endonuclease family. Active XPF endonucleases form a heterodimer with ERCC1 proteins. Here, we show that PTD, an ERCC1-like protein, is required for class-I-interfering crossovers along with SHOC1, MSH4, MSH5, MER3 and MLH3. SHOC1 interacts with PTD in a two-hybrid assay, through its XPF-like nuclease-(HhH)(2) domain. We propose that a XPF-ERCC1-like heterodimer, represented by SHOC1 and PTD in Arabidopsis, involving Zip2 in Saccharomyces cerevisiae and C9orf84 in human, is required for formation of class I crossovers.
© 2011. Published by The Company of Biologists Ltd
MeSH terms
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Arabidopsis / genetics*
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Arabidopsis Proteins / genetics
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Arabidopsis Proteins / metabolism*
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Carrier Proteins
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Cation Transport Proteins
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Crossing Over, Genetic* / genetics
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DNA-Binding Proteins / metabolism
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Dimerization
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Endodeoxyribonucleases / genetics
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Endodeoxyribonucleases / metabolism*
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Endonucleases / genetics
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Endonucleases / metabolism*
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Epistasis, Genetic / genetics
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Evolution, Molecular
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Humans
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Meiosis
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Mutation / genetics
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Phylogeny
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Protein Binding
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Proteins
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Saccharomyces cerevisiae
Substances
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Arabidopsis Proteins
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Carrier Proteins
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Cation Transport Proteins
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DNA-Binding Proteins
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PTD protein, Arabidopsis
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Proteins
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SLC39A2 protein, human
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SPACA9 protein, human
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Endodeoxyribonucleases
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Endonucleases
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Ercc1 protein, Arabidopsis
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SHOC1 protein, Arabidopsis
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XPF protein, Arabidopsis