Table 5 Summary of data used to support actinobacterial ancestry of archaea.
Trait | Supports actinobacterial ancestry of Neomura | Supports actinobacterial Ancestry of Eukaryotes | Exclusive to Actinobacteria among Bacteria |
|---|---|---|---|
20s proteasome | Yes | Yes | In a few other bacterial genomes |
CCA added post-transcriptionally | No | No | Also in Firmicutes |
Sterols | No | Yes | In a few other bacterial genomes (HGT), but only ones that could be vertical are actinobacterial |
Chitin | No | No | Not in Actinobacteria |
Serine/threonine signaling system | No | Yes | In Firmicutes too |
Tyrosine Kinase | No | Yes | In many bacteria |
H1 linker histone | No | Yes | In many bacteria |
Calmodulin | No | Yes | In many bacteria |
Phosphatidylinositol | No | Yes | Apparently unique to Actinobacteria, but related enzymes in other groups |
Serine proteases | No | Yes | In many bacteria |
Primary structure of α-amylase | No | No | In a few other bacterial genomes |
Fatty Acid synthetase complex | No | Maybe | Exclusive to actinobacteria |
Exospore formation | No | Yes | Exclusive to actinobacteria |
HEH domain in Ku protein | No | No | Exclusive to actinobacteria |