Elicitin genes in Phytophthora infestans are clustered and interspersed with various transposon-like elements.
Sequencing and annotation of a contiguous stretch of genomic DNA (112.3 kb) from the oomycete plant pathogen Phytophthora infestans revealed the order, spacing and genomic context of four members of the elicitin (inf) gene family. Analysis of the GC content at the third codon position (GC3) of six genes encoded in the region, and a set of randomly selected coding regions as well as random genomic regions, showed that a high GC3 value is a general feature of Phytophthora genes that can be exploited to optimize gene prediction programs for Phytophthora species. At least one-third of the annotated 112.3-kb P. infestans sequence consisted of transposons or transposon-like elements. The most prominent were four Tc3/gypsy and Tc1/copia type retrotransposons and three DNA transposons that belong to the Tc1/mariner, Pogo and PiggyBac groups, respectively. Comparative analysis of other available genomic sequences suggests that transposable elements are highly heterogeneous and ubiquitous in the P. infestans genome.
Jiang
Rays H Y
RH
Plant Sciences Group, Laboratory of Phytopathology, Graduate School of Experimental Plant Sciences, Wageningen University, Binnenhaven 5, 6709 PD, Wageningen, The Netherlands.
Dawe
Angus L
AL
Weide
Rob
R
van Staveren
Marjo
M
Peters
Sander
S
Nuss
Donald L
DL
Govers
Francine
F
D020418:Algal Proteins / Q000235:genetics*; D001482:Base Composition; D001483:Base Sequence; D022202:Chromosomes, Artificial, Bacterial; D016000:Cluster Analysis; D004251:DNA Transposable Elements / Q000235:genetics*; D023061:Gene Order; D008969:Molecular Sequence Data; D005810:Multigene Family / Q000235:genetics*; D010802:Phylogeny; D010838:Phytophthora / Q000235:genetics*; D011506:Proteins; D017422:Sequence Analysis, DNA
D020418:Algal Proteins; D004251:DNA Transposable Elements; D011506:Proteins; C085101:elicitin, Phytophthora