TREP, the TRansposable Elements Platform

Superfamily Viper                   RYV

Full classification: Retrotransposon, LTR, Viper

Viper elements are Class 1 transposons.

They are relatively rare. Were found some eukaryotes, but not in animals, plants, fungi. Upon insertion, they create a 0 bp Target site duplication (TSD).

Structure of Viper elements

Sequence domains

LTR: Long terminal repeat
Function: Contains promoter and terminator elements (dual function).
Protein motifs:

GAG: GAG protein
Function: Required as envelope of virus-like capsid
Protein motifs: CCHC

AP: Aspartic protease
Function:
Protein motifs:

RT: Reverse transcriptase
Function: Reverse transcription of mRNA to DNA, core motif is relatively variable (FY)(IAMV)DD
Protein motifs: YVDD

RH: RNAse H
Function:
Protein motifs: DEDD

YR: Tyrosine recombinase
Function:
Protein motifs:

YR: Tyrosine recombinase
Function:
Protein motifs:

LTR: Long terminal repeat
Function: Contains promoter and terminator elements (dual function).
Protein motifs:

LTR: Long terminal repeat
Function: Contains promoter and terminator elements (dual function).
Protein motifs:

LTR: Long terminal repeat
Function: Contains promoter and terminator elements (dual function).
Protein motifs:

0 Viper Download all 'RYV' elements in total_TREP database elements from the following taxa are in the total_TREP database:

Taxonomic group	Total elements

---