Table 1

Fully sequenced cycad clones from contigs that match only genes in gymnosperms

Contig
GenBank accession number
Transcript length (bp)
Peptide (residues)
InterPro result

gy79c04_704
CB090702
586
72
No matches found
gy78g12_244
CB090673
627
84
No matches found
te82h02_741
CB093328
647
107
No matches found
he95e08_721
CB091708
651
114
No matches found
hf04g07_288
CB092366
684
141
ASP_RICH (unintegrated)
hk42a07_743
CB093061
790
142
No matches found
gp23c01_369
CB089407
791
189
No matches found
gp26f08_297
CB089628
827
69
No matches found
gy82g05_181
CB090964
840
118
No matches found
he92f06_688
CB091462
935
170
No matches found
gy81e11_544
CB090877
948
211
ASP_RICH (unintegrated)
he97c12_740
CB091858
965
140
No matches found
gp32b03_724
CB089926
1311
335
Peptidoglycan-binding LysM
te83a03_729
CB093338
1899
527
No matches found
Average

893
173


All available ESTs and annotated genes from GenBank were divided into three categories (angiosperms, gymnosperms and lower plants) and compared with the C. rumphii UniGene set. Forty-six cycad ESTs that had no similarity to angiosperm genes, but matched gymnosperm and lower plant genes, were fully sequenced, of which 14 clones (listed) still have no similarity to angiosperms. To confirm that these genes were of cycad origin, all 14 were successfully amplified from the DNA of a C. rumphii specimen other than the one used to construct the cDNA library. The transcript length, as well as the predicted translation product size, is shown. Interpro analysis identified conserved motifs in three of these cycad ESTs as shown.

Brenner et al. Genome Biology 2003 4:R78   doi:10.1186/gb-2003-4-12-r78