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Vol 50(2016) N 6 p. 900-908; DOI 10.1134/S002689331606011X Full Text

A.P. Kovina1*, N.V. Petrova2, S.V. Razin1,2, O.V. Yarovaia2

Main regulatory element (MRE) of the Danio rerio α/β-globin gene domain exerts enhancer activity toward the promoters of the embryonic-larval and adult globin genes

1Biological Faculty, Moscow State University, Moscow, 119992 Russia
2Institute of Gene Biology, Russian Academy of Sciences, Moscow, 119334 Russia

*anastasiya.kovina@mail.ru
Received - 2015-12-24; Accepted - 2016-02-11

In warm-blooded vertebrates, the α- and β-globin genes are organized in domains of different types and are regulated in different fashion. In cold-blooded vertebrates and, in particular, the tropical fish Danio rerio, the α- and β-globin genes form two gene clusters. A major D. rerio globin gene cluster is in chromosome 3 and includes the α- and β-globin genes of embryonic-larval and adult types. The region upstream of the cluster contains c16orf35, harbors the main regulatory element (MRE) of the α-globin gene domain in warm-blooded vertebrates. In this study, transient transfection of erythroid cells with genetic constructs containing a reporter gene under the control of potential regulatory elements of the domain was performed to characterize the promoters of the embryonic-larval and adult α- and β-globin genes of the major cluster. Also, in the 5th intron of c16orf35 in Danio reriowas detected a functional analog of the warm-blooded vertebrate MRE. This enhancer stimulated activity of the promoters of both adult and embryonic-larval α- and β-globin genes.

globin genes, promoter, enhancer, Danio rerio



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