The Conserved Oligomeric Golgi (COG) Complex Functions During a Defense Response to .

The conserved oligomeric Golgi (COG) complex, functioning in retrograde trafficking, is a universal structure present among eukaryotes that maintains the correct Golgi structure and function. The COG complex is composed of eight subunits coalescing into two sub-complexes. COGs1-4 compose Sub-complex A. COGs5-8 compose Sub-complex B. The observation that COG interacts with the syntaxins, suppressors of the erd2-deletion 5 (Sed5p), is noteworthy because Sed5p also interacts with Sec17p [alpha soluble NSF attachment protein (α-SNAP)]. The α-SNAP gene is located within the major [soybean cyst nematode (SCN)] resistance locus () and functions in resistance. The study presented here provides a functional analysis of the COG complex. The analysis has identified two paralogs of each COG gene. Functional transgenic studies demonstrate at least one paralog of each COG gene family functions in during resistance. Furthermore, treatment of with the bacterial effector harpin, known to function in effector triggered immunity (ETI), leads to the induced transcription of at least one member of each COG gene family that has a role in resistance. In some instances, altered COG gene expression changes the relative transcript abundance of syntaxin 31. These results indicate that the COG complex functions through processes involving ETI leading to resistance.