Spatial configuration of transposable element Ac termini affects their ability to induce chromosomal breakage in maize

Chuanhe Yu, Jianbo Zhang, Vinay Pulletikurti, David F. Weber, Thomas Peterson

Research output: Contribution to journalArticlepeer-review

14 Scopus citations

Abstract

Composite or closely linked maize (Zea mays) Ac/Ds transposable elements can induce chromosome breakage, but the precise configurations of Ac/Ds elements that can lead to chromosome breakage are not completely defined. Here, we determined the structures and chromosome breakage properties of 15 maize p1 alleles: each allele contains a fixed fractured Ac (fAc) element and a closely linked full-length Ac at various flanking sites. Our results show that pairs of Ac/fAc elements in which the termini of different elements are in direct or reverse orientation can induce chromosome breakage. By contrast, no chromosome breakage is observed with alleles containing pairs of Ac/fAc elements in which the external termini of the paired elements can function as a macrotransposon. Among the structures that can lead to chromosome breaks, breakage frequency is inversely correlated with the distance between the interacting Ac/Ds termini. These results provide new insight into the mechanism of transposition-induced chromosome breakage, which is one outcome of the chromosome-restructuring ability of alternative transposition events.

Original languageEnglish (US)
Pages (from-to)744-754
Number of pages11
JournalPlant Cell
Volume22
Issue number3
DOIs
StatePublished - Mar 2010
Externally publishedYes

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