Defective kernel 66 encodes a GTPase essential for kernel development in maize.

The mitochondrion is a semi-autonomous organelle that provides energy for cell activities through oxidative phosphorylation. In this study, we identified a defective kernel 66 (dek66)-mutant maize with defective kernels. We characterized a candidate gene, DEK66, encoding a ribosomal assembly factor located in mitochondria and possessing GTPase activity (which belongs to the ribosome biogenesis GTPase A family).

Arabidopsis AtPRP17 functions in embryo development by regulating embryonic patterning.

Arabidopsis AtPRP17, a homolog of yeast splicing factor gene PRP17, is expressed in siliques and embryos and functions in embryo development via regulating embryonic patterning. Yeast splicing factor PRP17/CDC40 is essential for cell growth through involvement in cell cycle regulation. Arabidopsis genome encodes a homolog of PRP17, AtPRP17; however, its function in Arabidopsis development is unknown.