Crystal structure of the ZP-N domain of ZP3 reveals the core fold of animal egg coatsMonne, M., Han, L., Schwend, T., Burendahl, S., Jovine, L.
(2008) Nature 456: 653-657
- PubMed: 19052627
- DOI: 10.1038/nature07599
- Primary Citation of Related Structures:
3EF7, 3D4C, 3D4G, 5OSQ
- PubMed Abstract:
- Mammalian sperm-egg interaction: identification of a glycoprotein in mouse egg zonae pellucidae possessing receptor activity for sperm
Bleil, J.D., Wassarman, P.M.
(1980) Cell 20: 873
- A large domain common to sperm receptors (Zp2 and Zp3) and TGF-beta type III receptor
Bork, P., Sander, C.
(1992) FEBS Lett 300: 237
- The ZP domain is a conserved module for polymerization of extracellular proteins
Jovine, L., Qi, H., Williams, Z., Litscher, E., Wassarman, P.M.
(2002) Nat Cell Biol 4: 457
- A duplicated motif controls assembly of zona pellucida domain proteins
Jovine, L., Qi, H., Williams, Z., Litscher, E.S., Wassarman, P.M.
(2004) Proc Natl Acad Sci U S A 101: 5922
- Zona pellucida domain proteins
Jovine, L., Darie, C.C., Litscher, E.S., Wassarman, P.M.
(2005) Annu Rev Biochem 74: 83
- The PLAC1-homology region of the ZP domain is sufficient for protein polymerisation
Jovine, L., Janssen, W.G., Litscher, E.S., Wassarman, P.M.
(2006) BMC Biochem 7: 11
Species-specific recognition between the egg extracellular matrix (zona pellucida) and sperm is the first, crucial step of mammalian fertilization. Zona pellucida filament components ZP3 and ZP2 act as sperm receptors, and mice lacking either of the ...
Species-specific recognition between the egg extracellular matrix (zona pellucida) and sperm is the first, crucial step of mammalian fertilization. Zona pellucida filament components ZP3 and ZP2 act as sperm receptors, and mice lacking either of the corresponding genes produce oocytes without a zona pellucida and are completely infertile. Like their counterparts in the vitelline envelope of non-mammalian eggs and many other secreted eukaryotic proteins, zona pellucida subunits polymerize using a 'zona pellucida (ZP) domain' module, whose conserved amino-terminal part (ZP-N) was suggested to constitute a domain of its own. No atomic structure has been reported for ZP domain proteins, and there is no structural information on any conserved vertebrate protein that is essential for fertilization and directly involved in egg-sperm binding. Here we describe the 2.3 ångström (A) resolution structure of the ZP-N fragment of mouse primary sperm receptor ZP3. The ZP-N fold defines a new immunoglobulin superfamily subtype with a beta-sheet extension characterized by an E' strand and an invariant tyrosine residue implicated in polymerization. The structure strongly supports the presence of ZP-N repeats within the N-terminal region of ZP2 and other vertebrate zona pellucida/vitelline envelope proteins, with implications for overall egg coat architecture, the post-fertilization block to polyspermy and speciation. Moreover, it provides an important framework for understanding human diseases caused by mutations in ZP domain proteins and developing new methods of non-hormonal contraception.
Karolinska Institutet, Department of Biosciences and Nutrition, Hälsovägen 7, SE-141 57 Huddinge, Sweden.