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Identification and expression of the elongator protein 2 (Ajelp2) gene, a novel regeneration-related gene from the sea cucumber Apostichopus japonicus

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Abstract

Elongator proteins comprise six subunits (ELP1–ELP6) and form protein complexes. The elongator protein 2 gene (elp2) encodes a protein with a WD40 repeats domain that acts as a scaffold for complex assembly. It also plays an important role in growth and development. In this study, the full-length cDNA of elongator protein 2 (Ajelp2) was cloned from the sea cucumber Apostichopus japonicus (A. japonicus) using rapid amplification of cDNA ends PCR techniques and comprised 3,058 bp, including a 54 bp 5′ untranslated (UTR), a 526 bp 3′ UTR and a 2,478 bp open reading frame encoding a polypeptide of 825 amino acids. The Ajelp2 sequence showed high homology to 12 other species. The molecular weight and isoelectric of point the presumptive protein were 91.6 kDa and 5.84, respectively. In situ hybridization indicated that the gene is expressed in the body wall, intestine, respiratory tree and longitudinal muscle. The expression level of Ajelp2 increased in recovering of organs in sea cucumber and showed it’s the highest expression level at the 15th day in the intestine and respiratory tree. Its expression then gradually decreased to normal levels. In the body wall, the expression level of Ajelp2 was up-regulated and then down-regulated. These results indicated that Ajelp2 is involved in protein regulation during the regeneration process in the sea cucumber A. japonicus.

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Abbreviations

Ajelp2 :

Elongator protein 2 of Apostichopus japonicus gene

AjELP2:

Elongator protein 2 of Apostichopus japonicus

A. japonicus :

Apostichopus japonicus

elp2 :

Elongator protein 2 gene

ELP2:

Elongator protein 2

NJ:

Neighbor-joining

ORF:

Open reading frame

SD:

Standard deviation

UTR:

Untranslated region

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Acknowledgments

We thank Professor Liu Weidong of the Liaoning Ocean and Fisheries Science Research Institute for assistance with the experiment.

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Authors and Affiliations

  1. College of Life Sciences, Liaoning Normal University, 1, Liushu South Street, Ganjingzi District, Dalian, 116081, People’s Republic of China

    Yanli Mei, Feng Yao, Yang Wu, Bing Chu, Cheng Cheng, Yan Liu, Xuejie Li & Lin Hou

  2. Department of Biology, Dalian Medical University, Dalian, 116044, People’s Republic of China

    Xiangyang Zou

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  1. Yanli Mei
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  2. Feng Yao
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  7. Xuejie Li
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Correspondence to Xiangyang Zou or Lin Hou.

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Mei, Y., Yao, F., Wu, Y. et al. Identification and expression of the elongator protein 2 (Ajelp2) gene, a novel regeneration-related gene from the sea cucumber Apostichopus japonicus . Mol Biol Rep 41, 4985–4996 (2014). https://doi.org/10.1007/s11033-014-3365-5

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