Table 4.
Genes present in members of the alphaproteobacteriaa
| Family | Contains the divK-celR operon | Contains CelA subunit with a PilZ domain | Uses CelR to regulate: |
|
|---|---|---|---|---|
| Cell differentiation | Cellulose synthesis | |||
| Acetobacteraceae | N | Y | U | N |
| Bradyrhizobiaceae | Y | Yb | U | U |
| Brucellaceae | Y | N | U | N |
| Caulobacteraceae | Y | N | Y | N |
| Methylobacteriaceae | N | Y | U | U |
| Phyllobacteriaceae | Y | Y | U | U |
| Rhizobiaceae | Y | Y | N | Y |
| Rhodobacteraceae | N | Y | U | N |
a
N, no members of the family contain the genes or enzymes; Y, at least a significant number of members of the family contain the genes or enzymes; U, no available literature.
b
Only Bradyrhizobium species contain celA; all other members of the Bradyrhizobiaceae lack the gene.