Journal
EXPERIMENTAL PARASITOLOGY
Volume 127, Issue 1, Pages 147-152Publisher
ACADEMIC PRESS INC ELSEVIER SCIENCE
DOI: 10.1016/j.exppara.2010.07.009
Keywords
Nuclear organization; Nuclear lamina protein; Trypanosoma cruzi; NUP-1; ChIP assay
Categories
Funding
- CNPq
- FIOCRUZ
- PRONEX (Fundacao Araucaria)
- CAPES
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The nuclear lamina is a structure that lines the inner nuclear membrane. In metazoans, lamins are the primary structural components of the nuclear lamina and are involved in several processes. Eukaryotes that lack lamins have distinct proteins with homologous functions. Some years ago, a coiled-coil protein in Trypanosoma brucei, NUP-1, was identified as the major filamentous component of its nuclear lamina. However, its precise role has not been determined. We characterized a homologous protein in Trypanosoma cruzi, TcNUP-1, and identified its in vivo DNA binding sites using a chromatin immunoprecipitation assay. We demonstrate for the first time that TcNUP-1 associates with chromosomal regions containing large non-tandem arrays of genes encoding surface proteins. We therefore suggest that TcNUP-1 is a structural protein that plays an essential role in nuclear organization by anchoring T. cruzi chromosomes to the nuclear envelope. (C) 2010 Elsevier Inc. All rights reserved.
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