TABLE 3.
Purified laccase enzymes from halophilic archaea and bacteria∗.
| Enzyme | ||||||||
| Name of microorganism | size (kDa) | ABTS oxidation | SGZ oxidation | Enzyme stability and activity | ||||
| Optimum | Optimum pH | Optimum | ||||||
| Km (μM) | kcat (s–1) | Km (μM) | kcat (s–1) | temperature (°C) | (for ABTS and SGZ) | NaCl (M) | ||
| Haloferax volcanii strain SB01 | 75 | 700 and 671 | 10.0 and 9.9 | 67 and 35 | 19.4 and 21.7 | 45–50 | 6 and 8.4 | 1 |
| and US021 | ||||||||
| Chromohalobacter sp.2 | 60 | NR | NR | NR | NR | 45 | NR | 3 |
| Bacillus sp. strain WT3 | 180 | 132.7 | 309 | 3.7 | 51 | 55 | 5 and 8 | 0.1 |
| Aquisalibacillus elongatus4 | 75 | 39.2 | 2150.0 | 16.1 | 918.8 | 40 | 6–8 | 2–3 |
| Bacillus safensis sp. strain S315 | NR | NR | NR | NR | NR | 30 | 5.5 | 0 |
∗ABTS, 2,2′-Azino-bis (3-ethylbenzothiazoline-6-sulfonic acid); SGZ, syringaldazine; NR, not reported. 1Uthandi et al. (2010), 2Rezaei et al. (2014), 3Siroosi et al. (2016), 4Rezaei et al. (2017), 5Siroosi et al. (2018).