In Torpedo marmorata, the vitelline envelope (VE), an extracellular envelope surrounding the growing oocyte, consists of fibrils and amorphous materials that are deposited in the perivitelline space starting from the initial steps of oocyte growth. SDS-PAGE analysis of the isolated and purified VE reveals that it consists of different glycoproteins. Furthermore, our investigations showed that the 120 and 66 kDa glycoproteins are positive to an antibody directed against gp69/64 of the Xenopus laevis VE and are synthesized under the control of 17beta-estradiol in the liver, that, together follicle cells and the oocyte, is the biosynthetic site of VE components.

Download full-text PDF

Source
http://dx.doi.org/10.1002/jez.b.21289DOI Listing

Publication Analysis

Top Keywords

vitelline envelope
8
torpedo marmorata
8
organization vitelline
4
envelope ovarian
4
ovarian follicles
4
follicles torpedo
4
marmorata risso
4
risso 1810
4
1810 elasmobranchii
4
elasmobranchii torpediniformes
4

Similar Publications

Intraspecific variation and functional study of VERL polymorphism in Pacific abalone (Haliotis discus hannai Ino) and giant abalone (H. gigantea Gmelin).

Int J Biol Macromol

January 2025

State Key Laboratory of Mariculture Breeding, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China; Fujian Key Laboratory of Genetics and Breeding of Marine Organisms, College of Ocean and Earth Sciences, Xiamen University, Xiamen 361102, China. Electronic address:

Article Synopsis
  • Sperm and eggs have specific proteins called gamete recognition proteins (GRPs) that influence their compatibility in fertilization, and this study focuses on the VERL receptor in two abalone species.
  • The full-length VERL sequences were found to be different in Pacific abalone (11,373 bp) and giant abalone (9,405 bp), with variations in their amino acid compositions and repeats.
  • Notably, the study discovered a relationship between VERL genotypes and mating preferences in giant abalone, highlighting amino acid diversity's role in fertilization and providing insights for improving abalone breeding practices.
View Article and Find Full Text PDF

Parent-offspring interactions constitute the first contact of many newborns with their environment, priming community assembly of microbes through priority effects. Early exposure to microbes can have lasting influences on the assembly and functionality of the host's microbiota, leaving a life-long imprint on host health and disease. Studies of the role played by parental care in microbial acquisition have primarily focused on humans and hosts with agricultural relevance.

View Article and Find Full Text PDF

The individual ovarian follicle of sturgeons (Acipenseriformes, Acipenseridae) contains an oocyte surrounded by follicular cells (FCs), basal lamina, and thecal cells. The late stages of the secondary growth of follicles (mid- and advanced vitellogenic) are not fully explained in Acipenseriformes. To explore and discuss the ultrastructure of oocytes, FCs, an egg envelope, and explain how micropylar cells differentiate and the canals of a multiple micropyle are formed, the samples of ovaries of the mature sterlet sturgeon Acipenser ruthenus were examined.

View Article and Find Full Text PDF

Mechanical characterization of Xenopus laevis oocytes using atomic force microscopy.

J Mech Behav Biomed Mater

September 2024

Department of Mechanical and Aerospace Engineering, New Mexico State University, Las Cruces NM, USA. Electronic address:

Mechanical properties are essential for the biological activities of cells, and they have been shown to be affected by diseases. Therefore, accurate mechanical characterization is important for studying the cell lifecycle, cell-cell interactions, and disease diagnosis. While the cytoskeleton and actin cortex are typically the primary structural stiffness contributors in most live cells, oocytes possess an additional extracellular layer known as the vitelline membrane (VM), or envelope, which can significantly impact their overall mechanical properties.

View Article and Find Full Text PDF

The female reproductive system of the sea spider Phoxichilidium femoratum (Rathke, 1799).

Arthropod Struct Dev

July 2024

Department of Invertebrates Zoology, Faculty of Biology, Moscow State University, Vorob'evy Gory 1, Building 12, Moscow, 119992, Russia. Electronic address:

Sea spiders (Pycnogonida) are marine chelicerates. Current pycnogonid phylogeny based on molecular data remains uncertain and contradicts traditional morphological perspectives. To resolve this conflict, understanding their inner anatomy is crucial.

View Article and Find Full Text PDF

Want AI Summaries of new PubMed Abstracts delivered to your In-box?

Enter search terms and have AI summaries delivered each week - change queries or unsubscribe any time!