A secreted endosymbiont protein essential for colonizing host cells

Nature, Published online: 01 July 2026; doi:10.1038/s41586-026-10711-4SyeA was present in the Buchnera ancestor, is secreted into the host cytoplasm, is homologous to secreted effectors of bacterial pathogens and is essential for Buchn…

Nature, Published online: 01 July 2026; doi:10.1038/s41586-026-10711-4

SyeA was present in the Buchnera ancestor, is secreted into the host cytoplasm, is homologous to secreted effectors of bacterial pathogens and is essential for Buchnera transmission.