Table 1.
Status of rdhA–homologous genes in the metagenome.
| Cluster | Number of genes | |||
|---|---|---|---|---|
| Rdh motifa | 2 × Fe-S motifb | TAT signalc | Adjacent rdhB | |
| Typical RdhA | + | + | + | + |
| Smkt1 | 9/12 | 12/12 | 0/12 | 1 |
| Smkt2 | 2/2 | 2/2 | 0/1 | |
| Smkt3 | 2/2 | 2/2 | 0/1 | |
| Smkt4 | 5/5 | 5/5 | N.A. | |
| Smkt5 | 1/1 | 1/1 | N.A. | |
| Dh/PCR | 2/2 | 2/2 | 1/1 | 2 |
| Ep | 1/1 | 1/1 | N.A. | |
| Sh | N.A. | 1/1 | N.A. | |
| Miscellaneous | 2/2 | 2/2 | N.A. | |
Number of genes with the motif/number of genes of which corresponding region was sequenced.
a
Number of genes that had a motif RDH (TIGR02486).
b
Number of genes that had conserved two sets of four cysteine residues (two Fe-S motifs).
c
Number of genes that had a TAT signal motif (TIGR01409 or PF10518.3). Only those with start codon were examined.
N.A., not applicable.