Cited by 53Reproductive biology and impacts on aquatic speciesReproductive Biology and FertilityDevelopmental Biology and Gene Regulation

Sea urchin ovoperoxidase: oocyte-specific member of a heme-dependent peroxidase superfamily that functions in the block to polyspermy

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LaFleur, Gary J, Horiuchi, Yuka, Wessel, Gary M·1998·Mechanisms of Development

Abstract

Ovoperoxidase is one of several oocyte-specific proteins that are stored within sea urchin cortical granules, released during the cortical reaction, and incorporated into the newly formed fertilization envelope. Ovoperoxidase plays a particularly important role in this process, crosslinking the envelope into a hardened matrix that is insensitive to biochemical and mechanical challenges and thus providing a permanent block to polyspermy. Here we present the primary structures of two ovoperoxidases as predicted from cDNAs cloned from the sea urchins Strongylocentrotus purpuratus (AF035380) and Lytechinus variegatus (AF035381). We also present a proposed scheme for the post-translational processing of ovoperoxidase based upon comparisons between the cDNA and protein structures and taking into account previously published reports. The sea urchin ovoperoxidase sequences conform to a profile shared by members of a heme-dependent animal peroxidase family, including the mammalian myelo-, lacto-, eosinophil, and thyroid peroxidases. Using in situ RNA hybridizations, we showed that the mRNA of S. purpuratus ovoperoxidase (4 kb) is present exclusively in oocytes, and is turned over rapidly following germinal vesicle breakdown. Taking into account our immunoblot and N-terminal sequencing data along with reports from similar peroxidases, we propose that ovoperoxidases are synthesized in a pre-pro form and proteolytically processed to result in the 70 and 50 kDa forms that are found in the fertilization envelope. The sequence and structural data presented here will facilitate our continuing studies of the biogenesis of cortical granules and the fertilization envelope. Additionally, since ovoperoxidase activities have been reported in a wide range of animals, these cDNAs will be useful in uncovering similar peroxidases used in the fertilization reactions of other metazoan eggs.

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  1. Browder, L.W. (Ed.), Developmental Biology. A Comprehensive Synth- esis, Vol. 1, Oogenesis. Plenum Press, New York, pp. 525-576.
  2. Kinsey, W.H., (1986). Purification and properties of the egg plasma mem- brane. In Schroeder, T.H. (Ed.), Echinoderm Gametes and Embryos, Vol. 27, Methods in Cell Biology. Academic Press, San Diego, pp. 139-152.
  3. McClay, D.R., (1986). Embryo dissociation, cell isolation, and cell reas- sociation. In: Schroeder, T.H. (Ed.), Echinoderm Gametes and Embryos, Vol. 27, Methods in Cell Biology. Academic Press, San Diego, pp. 1986.
  4. Weidman, P.J. and Kay, E.S., (1986). Egg and embryonic extracellular coats: isolation and purification. In: Schroeder, T.E. (Ed.), Methods in Cell Biology, Vol. 27, Echinoderm Gametes and Embryos. Academic Press, San Diego, pp. 111-138.

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Authors
LaFleur, G. J., Horiuchi, Y., & Wessel, G. M.
Affiliations
Brown University (US)
Corresponding author
LaFleur, Gary J
Venue
Mechanisms of Development
Publisher
Elsevier BV
Published
1998-01
Volume
70
Issue
1-2
Pages
77-89
ISSN
0925-4773 (ISSN-L)
OpenAlex
W2095422854
Cited by
53
References
79
Citations by year
2025: 1 · 2022: 3 · 2019: 1 · 2016: 2 · 2015: 1 · 2014: 1 · 2013: 2 · 2012: 1
FWCI
1.79
Type
journal article
Language
en
Open access
Locations
  • Mechanisms of Development (publishedVersion)
  • PubMed (publishedVersion)
Topics
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Physiology › Reproductive biology and impacts on aquatic species
  • Health Sciences › Medicine › Public Health, Environmental and Occupational Health › Reproductive Biology and Fertility
  • Life Sciences › Biochemistry, Genetics and Molecular Biology › Molecular Biology › Developmental Biology and Gene Regulation
Keywords
sea urchins, Strongylocentrotus purpuratus, Lytechinus variegatus, cortical reaction, fertilization envelope, polyspermy block, cortical granules, post-translational processing, germinal vesicle breakdown, mRNA turnover, fertilisation (biology)
MeSH terms
Amino Acid Sequence, Animals, Base Sequence, Cloning, Molecular, Female, Fertilization, Heme, Male, Molecular Sequence Data, Oocytes, Peroxidases, Protein Processing, Post-Translational, Sea Urchins, Substrate Specificity, Tyrosine, Sequence Homology, Amino Acid, DNA Primers, DNA, Complementary

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