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In vivo analysis of translation initiation sites in Plasmodium falciparum

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Title In vivo analysis of translation initiation sites in Plasmodium falciparum
 
Creator PATAKOTTU, BR
SINGH, PK
MALHOTRA, P
CHAUHAN, VS
PATANKAR, S
 
Subject P. falciparum
Malaria
Translation initiation sites
Mutational analysis
MALARIA PARASITES
MESSENGER-RNAS
POSTTRANSCRIPTIONAL REGULATION
SACCHAROMYCES-CEREVISIAE
STRUCTURAL FEATURES
HUMAN ERYTHROCYTES
SEQUENCE FLANKING
START SITES
CODON
EFFICIENCY
 
Description Regulation of gene expression in the malaria parasite Plasmodium falciparum is tightly controlled and little is known about the many steps involved. One step i.e. translation initiation is also poorly understood and in P. falciparum, choice of the translation initiation site (TIS) is a critical decision largely due to the high frequency of AUGs in the relatively long 50 untranslated regions of parasite mRNAs. The sequences surrounding the TIS have a major role to play in translation initiation and this report evaluates these sequences by mutational analysis of the heat shock protein 86 gene, transient transfection and reporter assays in the parasite. We find that purines at the -3 and +4 positions are essential for efficient translation in P. falciparum, similar to other eukaryotes. Interestingly, a U at the -1 position results in 2.5-fold higher reporter activity compared to wild type. Certain classes of protein biosynthetic genes show higher frequencies of U at the -1 position, suggesting that these genes may exhibit higher levels of translation. This work defines the optimal sequences for TIS choice and has implications for the design of efficient expression vectors in an important human pathogen.
 
Publisher SPRINGER
 
Date 2014-10-15T13:25:11Z
2014-10-15T13:25:11Z
2012
 
Type Article
 
Identifier MOLECULAR BIOLOGY REPORTS, 39(3)2225-2232
http://dx.doi.org/10.1007/s11033-011-0971-3
http://dspace.library.iitb.ac.in/jspui/handle/100/14998
 
Language en