Description
SURL is a Ty3/Gypsy LTR retrotransposon described in the genome of Tripneustes gratilla (Springer, Davidson and Britten 1991). SURL belongs, along with other LTR retrotransposons, to Mag a large Ty3/Gypsy cluster widely distributed in both protostomes and deuterostomes (for more details, see Malik and Eickbush 1999; Volff et al. 2001; Tubio, Naveira and Costas 2004). The genomic structure of SURL is 5.3 Kb in size including LTRs of 254 nt. The internal region of this element displays a Primer Binding Site (PBS) complementary to a tRNAmet, a single Open Reading Frame (ORF) that codifies for a single gag-pol polyprotein, and a Polypurine Tract (PPT) adjacent to the 3´LTR (Springer, Davidson and Britten 1991)
Structure
Figure not to scale. If present, long terminal repeats (LTRs) have been highlighted in blue. Amino acid motifs noted with lines indicate the conserved residues in each protein domain, abbreviations below mean:
| MA=matrix
|
PR=protease
|
DU or DUT=dUTPase
|
TM=transmembrane
|
TAV or IBMP=transactivator/viroplasmin or inclusion body matrix protein
|
| CA=capsid
|
RT=reverse transcriptase
|
INT=Integrase
|
CHR=chromodomain
|
| NC=nucleocapsid
|
RH=RNaseH
|
SU=surface
|
MOV=movement protein
|
| PPT=polypurine tract
|
PBS=primer binding site
|
ATF=aphid transmission factor
|
VAP=virion associated protein
|
Related literature
|
|
