6gf8

Molecular basis of egg coat filament cross-linking: structure of the glycosylated ZP1 ZP-N1 domain homodimer

spinqualitylabelsall models 6gf8, resolution 3.10Å Show:Asymmetric Unit Biological Assembly Drag the structure with the mouse to rotate   Export Animated Image   Print3D Structural highlights 6gf8 is a 2 chain structure with sequence from Gallus gallus. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance. Method: X-ray diffraction, Resolution 3.1Å Ligands: FUC, MPD, NAG Resources: FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT Function A0A140JXP0_CHICK Publication Abstract from PubMed Mammalian fertilisation begins when sperm interacts with the egg zona pellucida (ZP), whose ZP1 subunit is important for fertility by covalently cross-linking ZP filaments into a three-dimensional matrix. Like ZP4, a structurally-related component absent in the mouse, ZP1 is predicted to contain an N-terminal ZP-N domain of unknown function. Here we report a characterisation of ZP1 proteins carrying mutations from infertile patients, which suggests that, in human, filament cross-linking by ZP1 is crucial to form a stable ZP. We map the function of ZP1 to its ZP-N1 domain and determine crystal structures of ZP-N1 homodimers from a chicken homolog of ZP1. These reveal that ZP filament cross-linking is highly plastic and can be modulated by ZP1 fucosylation and, potentially, zinc sparks. Moreover, we show that ZP4 ZP-N1 forms non-covalent homodimers in chicken but not in human. Together, these data identify human ZP1 cross-links as a promising target for non-hormonal contraception. Molecular basis of egg coat cross-linking sheds light on ZP1-associated female infertility.,Nishimura K, Dioguardi E, Nishio S, Villa A, Han L, Matsuda T, Jovine L Nat Commun. 2019 Jul 12;10(1):3086. doi: 10.1038/s41467-019-10931-5. PMID:31300655 From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

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