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Semin Reprod Med 2006; 24(4): 204-216
DOI: 10.1055/s-2006-948550
Copyright © 2006 by Thieme Medical Publishers, Inc., 333 Seventh Avenue, New York, NY 10001, USA.

Tracking Down the ZP Domain: From the Mammalian Zona Pellucida to the Molluscan Vitelline Envelope

Magnus Monné1 , Ling Han1 , Luca Jovine1
  • 1Karolinska Institutet, Department of Biosciences and Nutrition, Center for Structural Biochemistry, Huddinge, Sweden
Further Information

Publication History

Publication Date:
30 August 2006 (online)

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ABSTRACT

Oocytes from virtually all organisms are surrounded by at least one coat. This specialized extracellular matrix, called the zona pellucida (ZP) in mammals and the vitelline envelope (VE) in nonmammals, has a structural function and plays essential roles in oogenesis, fertilization, and early development. During the last 15 years, compelling evidence has accumulated that all ZP/VE subunits polymerize using a conserved sequence, the ZP domain, so that the basic structural features of egg coat matrices have been maintained through evolution. Moreover, ZP domains have been identified in many other polymeric extracellular proteins from eukaryotes. This review compares the ultrastructure and molecular composition of egg coats from mollusc to human, suggests a common mechanism for assembly of ZP/VE proteins, and discusses alternative models of how these could be arranged within filaments.

KEYWORDS

Zona pellucida - vitelline envelope - extracellular matrix - fertilization - sperm-egg recognition

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 Dr.
Luca Jovine

Karolinska Institutet, Department of Biosciences and Nutrition

Center for Structural Biochemistry, Hälsovägen 7, S-141 57 Huddinge, Sweden

Email: luca.jovine@biosci.ki.se

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