Element:Calypso

Description Calypso is a LTR retroelement found in the genome Glycine max (Peterson-Burch et al. 2000). Calypso belongs to Athila clade, a lineage of possible retroviruses in plants (Wright and Voytas 2002), which is sibling of Tat clade, a lineage of plant LTR retrotransposons. Both lineages provide evidence of a shared ancestral lineage originally described as Class A by Wright and Voytas (1998). The full-length consensus for Calypso is 13 Kb in size including LTRs of 1.8 Kb. The internal region of this element displays a Primer Binding Site (PBS) complementary to a tRNAAsp, three Open Reading Frames (ORFs) for gag, pol, and env genes, and two Polypurine Tracts, PPT1 and PPT2, adjacent to the 3´LTR (Wright and Voytas 2002). 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 Mobile DNA II. (Craig et al. 2002)

Genbank accession: AF186183(env Calypso2-1) AF186185(5′LTR, gag Calypso4-1) AF186186(3′LTR, pol Calypso5-1) Clade: Athila Cluster or genus: Athila/Tat Branch or class: Branch 2 Family: Ty3/Gypsy System: LTR retroelements Host: Explore the Tree Life Project Glycine max Image, Carlos Llorens, Copyright, GyDB, Biotech Vana Browse all elements