TcRRMs and Tcp28 genes are intercalated and differentially expressed in Trypanosoma cruzi life cycle.
The identification and characterization of RNA binding proteins in Trypanosoma cruzi are particularly relevant as they play key roles in the regulatory mechanisms of gene expression. In this work, we have identified coding sequences for the proteins, named TcRRM1 and TcRRM2, in the EST database generated by the T. cruzi genomic initiative. TcRRM1 and TcRRM2 contain two RNA binding domains (RRM) and are very similar to two Trypanosoma brucei RNA binding proteins previously reported, Tbp34 and Tbp37, and to a not yet annotated ORF in Leishmania major genome project. The T. cruzi RRM genes are organized in tandem, alternating with copies of Tcp28, a gene of unknown function. However, TcRRM transcript accumulation is higher in the spheromastigote stage, while Tcp28 transcripts accumulate more in the trypomastigote stage suggesting developmental regulation.
Gomes
Giselle Guimarães
GG
Instituto de Biofísica Carlos Chagas Filho, Universidade Federal do Rio de Janeiro, Brazil.
Peter Urményi
Turán
T
Rondinelli
Edson
E
Williams
Noreen
N
Silva
Rosane
R
D000595:Amino Acid Sequence; D000818:Animals; D001483:Base Sequence; D020224:Expressed Sequence Tags; D017125:Genes, Protozoan / Q000235:genetics*; D007891:Leishmania / Q000235:genetics; D008018:Life Cycle Stages / Q000235:genetics; D008969:Molecular Sequence Data; D015800:Protozoan Proteins / Q000737:chemistry / Q000235:genetics*; D016601:RNA-Binding Proteins / Q000737:chemistry / Q000235:genetics*; D015183:Restriction Mapping; D016415:Sequence Alignment; D017386:Sequence Homology, Amino Acid; D014346:Trypanosoma brucei brucei / Q000235:genetics; D014349:Trypanosoma cruzi / Q000235:genetics* / Q000254:growth & development
D015800:Protozoan Proteins; D016601:RNA-Binding Proteins; C492573:RRM1 protein, Trypanosoma cruzi; C492574:RRM2 protein, Trypanosoma cruzi