Helitron-1N1_DR (DF0002834)

Non-autonomous Helitron from zebrafish


Helitron-1N1_DR is a nonautonomous deletion derivate of Helitron-1_DR; that was transposed by the Helitron-1_DR-encoded proteins. The genome contains several hundred copies of Helitrons. Many of them form clusters composed of 2-20 tandemly repeated elements (du to the rolling-circle replication). These elements, like most of Helitrons, are inserted into 5'-A|T-3' target sites without their duplications. They are frequently inserted into (TAA)n microsatellites. The 3' terminal region (pos. 975-987) is complementary to the 5' terminal region (pos. 23-35). Probably, this complementarity induces formation of a circular DNA structure important during the rolling-circle replication. The standard 3' short palindrome is at pos. 955-972. There is also a short 12-bp palindrome at pos. 6-17. Numerous copies of Helitrons-1N1_ZF are <3% divergent from the consensus. Therefore, transposition of this family has occurred quite recently.


  1. Helitrons on a roll: eukaryotic rolling-circle transposons.
    Kapitonov VV, Jurka J;
    Trends Genet 2007;23:521-529 Pubmed


Accession Name Wikipedia
Type DNA Transposon Article
Class Rolling Circle
Superfamily Helitron Article

Hit Statistics

The model is 989 positions long. The average length of non-redundant hits to the model is 575.8. This table shows the number of hits above score thresholds:

Species Gathering Trusted
non-redundant all hits non-redundant all hits
Danio rerio 938 2832 904 1991

External Database Links