Translator Disclaimer
1 December 2001 Molecular Characterization of Putative Yolk Processing Enzymes and Their Expression During Oogenesis and Embryogenesis in Rainbow Trout (Oncorhynchus mykiss)
Author Affiliations +
Abstract

Vitellogenin is the major yolk protein precursor in fish, but little is known about its processing pathway in the oocyte, nor about mobilization of yolk proteins during embryogenesis. In this study we cloned three putative yolk processing enzymes; specifically, cathepsin B and L, and lipoprotein lipase (LPL), from the rainbow trout ovary and determined their patterns of gene expression, together with cathepsin D, during oogenesis and embryogenesis using reverse transcription-polymerase chain reaction. The approximate sizes of both cathepsin B and cathepsin L transcripts were estimated as 1.7–1.8 kilobases by Northern blot analysis. Cathepsin D mRNA and cathepsin L mRNA were expressed constitutively throughout vitellogenesis and embryogenesis, showing the highest levels of expression at around fertilization. Cathepsin B and LPL were expressed exclusively during oogenesis. Quantitatively, expression of cathepsin D mRNA was higher than cathepsin B, cathepsin L, and LPL mRNA throughout the period studied. The different patterns of expression for these genes during oogenesis and embryogenesis signify specific temporal roles in yolk protein processing.

Joon Yeong Kwon, Francisco Prat, Clive Randall, and Charles R. Tyler "Molecular Characterization of Putative Yolk Processing Enzymes and Their Expression During Oogenesis and Embryogenesis in Rainbow Trout (Oncorhynchus mykiss)," Biology of Reproduction 65(6), (1 December 2001). https://doi.org/10.1095/biolreprod65.6.1701
Published: 1 December 2001
JOURNAL ARTICLE
9 PAGES

This article is only available to subscribers.
It is not available for individual sale.
+ SAVE TO MY LIBRARY

SHARE
ARTICLE IMPACT
RIGHTS & PERMISSIONS
Get copyright permission
Back to Top