DIFFERENTIAL EXPRESSION OF A FAMILY OF PUTATIVE ADENYLATE GUANYLATE-CYCLASE GENES IN TRYPANOSOMA-BRUCEI

被引:71
作者
ALEXANDRE, S [1 ]
PAINDAVOINE, P [1 ]
TEBABI, P [1 ]
PAYS, A [1 ]
HALLEUX, S [1 ]
STEINERT, M [1 ]
PAYS, E [1 ]
机构
[1] UNIV BRUSSELS,DEPT MOLEC BIOL,67 RUE CHEVAUX,B-1640 RHODE ST GENESE,BELGIUM
关键词
Adenylate cyclase; Gene expression; Guanylate cyclase; Parasite life-cycle; Trypanosome;
D O I
10.1016/0166-6851(90)90152-C
中图分类号
Q5 [生物化学]; Q7 [分子生物学];
学科分类号
071010 ; 081704 ;
摘要
The expression site for the variant surface glycoprotein (VSG) gene of Trypanosoma brucei contains several genes of unknown function (ESAGs, for expression site-associated genes). Among these, ESAG 4 shows homology to eukaryotic adenylate/guanylate cyclase genes, in the region encoding the presumptive enzyme catalytic domain. This gene belongs to a family of related sequences, and hybridizes to the genomic DNA of other trypanosomatids, such as Trypanosoma congolense, Trypanosoma vivax and Trypanosoma mega. While ESAG 4 is transcribed only in bloodstream forms by a RNA polymerase resistant to α-amanitin, at least three other members of this family are transcribed in both bloodstream and procyclic forms, by a RNA polymerase sensitive to the drug. These genes encode different putative transmembrane proteins showing high sequence conservation in the region corresponding to the adenylate/guanylate cyclase catalytic domain. © 1990.
引用
收藏
页码:279 / 288
页数:10
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