A similar gene is shared by both the variant surface glycoprotein and procyclin gene transcription units of Trypanosoma brucei.
The genes for the variant surface glycoprotein (VSG) and procyclin are expressed in a mutually exclusive manner during the life cycle of Trypanosoma brucei and synthesize the most abundant mRNAs specific to the bloodstream and procyclic stages of the parasite, respectively. Genes belonging to the polycistronic transcription unit of the VSG gene (expression site-associated genes [ESAGs]) are uniquely expressed in the bloodstream form, but some members of ESAG families (genes related to ESAGs [GRESAGs]) are independently transcribed outside the VSG gene expression site. We report here that a gene related to ESAG 2, GRESAG 2.1, is present and expressed in a procyclin gene transcription unit (PARP A locus), which is polycistronic. Members of the ESAG 2 family are thus present in the two major differentially stage-regulated transcription units of this parasite.
Berberof
M
M
Department of Molecular Biology, University of Brussels, Belgium.
Pays
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D000546:Amanitins / Q000494:pharmacology; D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D003001:Cloning, Molecular; D004247:DNA / Q000235:genetics; D005796:Genes; D006023:Glycoproteins; D008562:Membrane Glycoproteins; D008969:Molecular Sequence Data; D005810:Multigene Family; D015800:Protozoan Proteins / Q000235:genetics*; D015183:Restriction Mapping; D012689:Sequence Homology, Nucleic Acid; D014158:Transcription, Genetic / Q000187:drug effects; D014346:Trypanosoma brucei brucei / Q000235:genetics*; D014643:Variant Surface Glycoproteins, Trypanosoma / Q000235:genetics*
D000546:Amanitins; C067441:GRESAG 2.1 protein, Trypanosoma brucei; D006023:Glycoproteins; D008562:Membrane Glycoproteins; D015800:Protozoan Proteins; D014643:Variant Surface Glycoproteins, Trypanosoma; C053277:procyclic acidic repetitive protein, Trypanosoma; D004247:DNA