Abstract
We determined the genomic structures and complete sequences of the coding regions of the chicken CENP-C and ZW10 genes. These two genes encode proteins that are thought to be involved in maintaining the fidelity of chromosome segregation. The chicken CENP-C gene is 30 kb in length and contains 19 exons. The chicken ZW10 gene spans 10 kb and contains 15 exons. The 5′-untranslated regions of these genes contain several binding sites for transcription factors such as Sp-1, E2F, p300, and members of the GATA family. By fluorescence in situ hybridization (FISH) analysis, the CENP-C was mapped to chromosome 4 and the ZW10 gene was mapped to a microchromosome. Antibodies against the chicken ZW10 protein revealed a cell cycle-dependent staining pattern in DT40 cells. ZW10 protein was distributed throughout the cytoplasm of DT40 cells during interphase. In most metaphase cells, ZW10 proteins appeared equally divided between the centromere and the spindle apparatus. During anaphase, chicken ZW10 proteins were no longer localized near chromosomes or the mitotic apparatus but were present diffusely in the cytoplasm.
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