Repbase Reports

2005, Volume 5, Issue 4
April 30, 2005
Copyright © 2001-2016 - Genetic Information Research Institute
ISSN# 1534-830X
Page 76

CR1-18_SP

CR1-18_SP is a non-LTR retrotransposon - a consensus sequence.

Submitted:
30-Apr-2005
Accepted:
30-Apr-2005
Key Words:
CR1; Non-LTR Retrotransposon; Interspersed Repeat; L1 ORF1; endonuclease; reverse transcriptase; CR1-18_SP
Source:
Strongylocentrotus purpuratus
Organism:
Strongylocentrotus purpuratus
Taxonomy:
Eukaryota; Metazoa; Echinodermata; Eleutherozoa; Echinozoa; Echinoidea; Euechinoidea; Echinacea; Echinoida; Strongylocentrotidae; Strongylocentrotus
[1] Authors:
Kapitonov,V.V. and Jurka,J.
Title:
CR1-18_SP, a family of non-LTR retrotransposons from the sea urchin genome.
Journal:
Repbase Reports 5(4), 76-76 (2005)
Abstract:
CR1-18_SP is a non-LTR retrotransposon that belongs to the CR1 clade. Copies of CR1-18_SP are ~2% divergent form the consensus sequence. The consensus sequence is still incomplete at its 5' end. CR1-18_SP encodes two proteins: 343-aa CR1-18_SPp1 (pos. 117-1145) similar to the L1 ORF1 protein, and 1005-aa CR1-18_SPp2 protein (pos. 1370-4384) composed of the CR1-like endonuclease and reverse transcriptase domains. The sea urchin genome harbors other young CR1 families characterized by the L1 ORF1 protein (e.g. CR1-12_SP, CR1-14_SP, CR1-16_SP). Likely, this is a feature of all CR1 non-LTR retrotransposons in sea urchin. Presumably, the L1-CR1 hybrid emerged in the past as a result of a template switch during reverse transcription. The 3' terminus of CR1-18_SP is composed of the (AACTTG) microsatellite.
Derived:
[1] (Consensus)
Download Sequence - Format:
IG, EMBL, FASTA
References:

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