Molecular and functional characterization of the vitellogenin receptor in oriental river prawn, Macrobrachium nipponense

Comparative Biochemistry and Physiology. Part A, Molecular & Integrative Physiology
Hongkun BaiYan Wu

Abstract

A complementary DNA (cDNA) that encodes the vitellogenin receptor (VgR) in the oriental river prawn, Macrobrachium nipponense, was cloned using expressed sequence tag analysis and a rapid amplification of cDNA ends approach. The coding region consists of 5920 base pairs (bp) that encode a 1902 amino acid protein, with a predicted molecular mass of 209 kDa. The coding region is flanked by a 45 bp 5'-untranslated region (UTR) and a 166 bp 3'-UTR. The deduced amino acid sequence of the M. nipponense VgR cDNA had typically conserved domains, such as an extracellular, lipoprotein-binding domain, epidermal growth factor-like and O-glycosylation domains, a transmembrane domain and a short C-terminal, cytosolic tail. Quantitative real-time PCR (qPCR) indicated that Mn-VgR is highly expressed in the female ovary. Expression analysis by qPCR demonstrated the larval and ovarian developmental stage-specific expression pattern. As the ovaries developed, the expression level of Mn-VgR gradually increased during the reproductive cycle (stage I), to reach a peak in stage III. Levels then dropped as a new development cycle was entered after reproduction molting. Eyestalk ablation led to a significant increase in the expression of Mn-VgR during ...Continue Reading

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Citations

Apr 11, 2019·International Journal of Molecular Sciences·Yabing WangYan Wu
Feb 13, 2021·Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics·Yuning HuLei Xu
Aug 2, 2021·Comparative Biochemistry and Physiology. Part D, Genomics & Proteomics·Qiang-Mei FengXu-Gan Wu

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