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An approach to classifying sequence tags sampled from Plasmodium falciparum var genes

Year: 2007
Type: article
Abstract: Plasmodium falciparum erythrocyte membrane protein 1 (PfEMP1) appears to play an key role as both a virulence factor and as a target of naturally acquired immunity [1,2].This large family of molecules is encoded by the highly polymorphic superfamily of var genes of which there are 60 variants in every genome [3].A rapidly growing collection of var sequences is now available from clinical isolates around the world [4-11].Despite immense diversity both in terms of overall organization and primary sequence, the majority of var genes contain a DBL1␣ region [3].The existence of short islands of homology within this region has enabled the design of primers that can be used to sample sequence from most var genes to create DBL1␣ sequence tags [5].A standard approach to classification of these sequence tags would enable direct comparisons to be made between different studies.However, the extreme diversity of var genes and the fact that they undergo intra-genic recombination [4,12,13], makes this difficult.Despite the high diversity there does appear to be underlying simplicity to the var genes that supports the use of information present in DBL1␣ sequence tags in making comparisons between the expression levels in different isolates.Analysis of
Language: English
Field: Medicine
Open Access status: hybrid
Estimated APC paid: $3,460
OpenAlex ID: W1964492981
FWCI: 4.447
Cites: 20
Cited by: 64
Related to: 10