2Biological Faculty, Lomonosov Moscow State University, 119991 Moscow, Russia
* To whom correspondence should be addressed.
Received June 23, 2008; Revision received July 23, 2008
This work deals with 3C (Chromosome Conformation Capture) analysis of the chicken α-globin gene domain in embryonic erythrocytes and lymphoid cells. Ligation products were quantitatively analyzed by real-time PCR with TaqMan probes. It was found that in lymphoid cells, where α-globin gene is not active, the domain has a relatively extended configuration. In embryonic erythrocytes that transcribe αD and αA genes, simultaneous interaction of several domain elements was revealed including the major regulatory element, the erythroid-specific DNase I hypersensitive site at a distance of 9 kb upstream from the α-globin gene cluster (-9 DHS), promoter of the housekeeping gene CGTHBA, the αD-globin gene promoter, and the erythroid-specific enhancer located after the α-globin gene cluster. We suppose that such interaction is necessary to provide for the active transcription status of the chicken α-globin gene domains in erythroid cells.
KEY WORDS: chicken α-globin gene domain, genome spatial organization, 3C, real-time PCR with TaqMan probes