Cookies Policy

This site uses cookies. By continuing to browse the site you are agreeing to our use of cookies.

I accept this policy

Find out more here

Molecular characterization of hepatopancreas vitellogenin and its expression during the ovarian development by in situ hybridization in the banana shrimp Fenneropenaeus merguiensis

No metrics data to plot.
The attempt to load metrics for this article has failed.
The attempt to plot a graph for these metrics has failed.
The full text of this article is not currently available.

Brill’s MyBook program is exclusively available on BrillOnline Books and Journals. Students and scholars affiliated with an institution that has purchased a Brill E-Book on the BrillOnline platform automatically have access to the MyBook option for the title(s) acquired by the Library. Brill MyBook is a print-on-demand paperback copy which is sold at a favorably uniform low price.

This Article is currently unavailable for purchase.
Add to Favorites
You must be logged in to use this functionality

A complete cDNA sequence of vitellogenin (Vg-H) was cloned from the hepatopancreas of Fenneropenaeus merguiensis (De Man, 1888). The full-length Vg-H gene consists of 7958 bp and contains an ORF of 7761 bp. It encodes a polypeptide of 2587 amino acids, comprising a predicted molecular mass of 283 kD and the theoretical pI is 6.5. The amino acid sequences of the mature vitellogenin (Vg) composed of a signal peptide, three possible O-glycosylation sites, three phosphorylation sites and putative possessing sites (R-X-K/R-R) recognized by subtilisin-like endoproteases. Cleavage at residues 725 to 728 will produce two Vg subunits (78 and 200 kD), which the N-terminal amino acid sequence of 78 kD subunit is identical to that of vitellin purified from the ovary. These properties suggest that Vg protein encoding by Vg-H undergoes processing at its synthetic sites prior to being transported to developing oöcytes. The deduced primary structure of Vg-H showed the highest identity (98.8%) to the Vg-O previously cloned from the ovary of the same species. It is more related to the penaeid Vg sequences than that of nonpenaeids. In situ hybridization revealed that mRNA encoding Vg was expressed both in follicle cells in the ovary and parenchyma cells in the hepatopancreas. In the developing ovary, highest levels were detected during the early vitellogenic stage 2, declining thereafter. In the hepatopancreas, Vg mRNA levels reached a maximum at stage 3 of ovarian development. Profiles of Vg mRNA expression in the ovary and hepatopancreas suggest that the contribution of these tissues to vitellogenesis is inversely related during gonad maturation. Thus, Vg gene sequences expressed in the ovary and hepatopancreas are most likely identical and both tissues are responded for yolk protein synthesis in F. merguiensis.

Affiliations: 1: 1Department of Biochemistry, Faculty of Science, Prince of Songkla University, Songkhla 90112, Thailand; 2: 2Department of Biology, College of Science and Mathematics, California State University, Fresno, CA 93740-8034, U.S.A.


Full text loading...


Data & Media loading...

Article metrics loading...



Can't access your account?
  • Key

  • Full access
  • Open Access
  • Partial/No accessInformation