Element:SURL

From The Gypsy Database

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

Surl.png


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

Genbank accession:M75723
Clade:C-clade
Cluster or genus:Mag
Branch or class:Branch 2
Family:Ty3/Gypsy
System:LTR retroelements
Host:
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Tripneustes gratilla.gif
Tripneustes gratilla
Image, courtesy of Jean-Jacques Eckert and Patrick Bertrand, Recif France
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