Gene structure, regulatory control, and evolution of black widow venom latrotoxins.

Gene structure, regulatory control, and evolution of black widow venom latrotoxins.
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DOI:
10.1016/j.febslet.2014.08.034
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发表时间:
2014-11-03
期刊:
影响因子:
3.5
通讯作者:
Garb JE
Garb JE
中科院分区:
生物学3区
文献类型:
--
作者:
Bhere KV;Haney RA;Ayoub NA;Garb JE

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Black widow venom contains α-latrotoxin, infamous for causing intense pain. Combining 33 kb of Latrodectus hesperus genomic DNA with RNA-Seq, we characterized the α-latrotoxin gene and discovered a paralog, 4.5 kb downstream. Both paralogs exhibit venom gland specific transcription, and may be regulated post-transcriptionally via musashi-like proteins. A 4 kb intron interrupts the α-latrotoxin coding sequence, while a 10 kb intron in the 3′ UTR of the paralog may cause nonsense-mediated decay. Phylogenetic analysis confirms these divergent latrotoxins diversified through recent tandem gene duplications. Thus, latrotoxin genes have more complex structures, regulatory controls, and sequence diversity than previously proposed.
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