ISDA

Deposition Date 2023-12-25

Release Date 2024-03-13

Last Version Date 2024-10-16

Entry Detail

PDB ID:

8RKH

Keywords:

CELL ADHESION

Title:

Crystal structure of the ZP-N2 and ZP-N3 domains of mouse ZP2 (mZP2-N2N3)

Biological Source:

Source Organism:

Mus musculus (Taxon ID: 10090)

Host Organism:

Homo sapiens

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

1.90 Å

R-Value Free:

0.24

R-Value Work:

0.21

R-Value Observed:

0.21

Space Group:

C 1 2 1

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Macromolecular Entities

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Zona pellucida sperm-binding protein 2
Gene (Uniprot):Zp2
Chain IDs:A, B
Chain Length:237
Number of Molecules:2
Biological Source:Mus musculus

UniProt ID:P20239

Ligand Molecules

NAG

Primary Citation

ZP2 cleavage blocks polyspermy by modulating the architecture of the egg coat.

Nishio, S, Emori, C, Wiseman, B, Fahrenkamp, D, Dioguardi, E, Zamora-Caballero, S, Bokhove, M, Han, L, Stsiapanava, A, Algarra, B, Lu, Y, Kodani, M, Bainbridge, R.E, Komondor, K.M, Carlson, A.E, Landreh, M, de Sanctis, D, Yasumasu, S, Ikawa, M, Jovine, L, Bleil, J.D, Wassarman, P.M, Bleil, J.D, Beall, C.F, Wassarman, P.M, Greve, J.M, Salzmann, G.S, Roller, R.J, Wassarman, P.M, Liang, L.F, Chamow, S.M, Dean, J, Rankin, T.L, O'Brien, M, Lee, E, Wigglesworth, K, Eppig, J, Dean, J, Boja, E.S, Hoodbhoy, T, Fales, H.M, Dean, J, Rankin, T.L, Coleman, J.S, Epifano, O, Hoodbhoy, T, Turner, S.G, Castle, P.E, Lee, E, Gore-Langton, R, Dean, J, Monne, M, Han, L, Schwend, T, Burendahl, S, Jovine, L, Gahlay, G, Gauthier, L, Baibakov, B, Epifano, O, Dean, J, Raj, I, Sadat Al Hosseini, H, Dioguardi, E, Nishimura, K, Han, L, Villa, A, de Sanctis, D, Jovine, L, Bokhove, M, Jovine, L.Show

Cell 187 1440 1459.e24 (2024)

PMID: 38490181 DOI: 10.1016/j.cell.2024.02.013

Abstact

Following the fertilization of an egg by a single sperm, the egg coat or zona pellucida (ZP) hardens and polyspermy is irreversibly blocked. These events are associated with the cleavage of the N-terminal region (NTR) of glycoprotein ZP2, a major subunit of ZP filaments. ZP2 processing is thought to inactivate sperm binding to the ZP, but its molecular consequences and connection with ZP hardening are unknown. Biochemical and structural studies show that cleavage of ZP2 triggers its oligomerization. Moreover, the structure of a native vertebrate egg coat filament, combined with AlphaFold predictions of human ZP polymers, reveals that two protofilaments consisting of type I (ZP3) and type II (ZP1/ZP2/ZP4) components interlock into a left-handed double helix from which the NTRs of type II subunits protrude. Together, these data suggest that oligomerization of cleaved ZP2 NTRs extensively cross-links ZP filaments, rigidifying the egg coat and making it physically impenetrable to sperm.

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Primary Citation of related structures