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Nat Plants. 2019 Mar;5(3):253-257. doi: 10.1038/s41477-019-0382-3. Epub 2019 Mar 8.

Gamete fusion is facilitated by two sperm cell-expressed DUF679 membrane proteins.

Author information

1
Cell Biology and Plant Biochemistry, Biochemistry Centre Regensburg, University of Regensburg, Regensburg, Germany.
2
Cell Biology and Plant Biochemistry, Biochemistry Centre Regensburg, University of Regensburg, Regensburg, Germany. stefanie.sprunck@ur.de.

Abstract

Successful double fertilization in flowering plants relies on two coordinated gamete fusion events, but the underlying molecular processes are not well understood. We show that two sperm-specific DOMAIN OF UNKNOWN FUNCTION 679 membrane proteins (DMP8 and DMP9) facilitate gamete fusion, with a greater effect on sperm-egg fusion than on sperm-central cell fusion. We also show that sperm adhesion and sperm cell separation depend on egg cell-secreted EGG CELL 1 proteins.

PMID:
30850817
DOI:
10.1038/s41477-019-0382-3

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