Element:Bel

From The Gypsy Database

Description

Bel is a LTR retrotransposon described in the genome of the dipter Drososphila melanogaster (Davis and Judd 1995). Bel gives the name and belongs to Bel clade (Copeland et al. 2005) within the Branch 1 of the Bel/Pao family (Llorens et al. 2009). The genome of Bel is 6126 bp in size, including LTRs of 361 nt. The internal region of this element displays a two ORFs: the smallest of 152 amino acids (aa) codes for an unknown protein while the largest of 1607 aa contains both gag and pol polyproteins which present their characteristics associated domains.

Structure

Bel.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:733531
Clade:Bel
Cluster or genus:Undetermined
Branch or class:Branch 1
Family:Bel/Pao
System:LTR retroelements
Host:
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Drosophila melanogaster.gif
Drososphila melanogaster
Image, courtesy of Andreas Trepte, Max-Planck Institute for Molecular Genetics
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