Purification and Characterization of Catalase from Marine Bacterium Acinetobacter sp. YS0810

Table 4

Comparison of the enzymatic properties of YS0810CAT with those of other monofunctional catalases from different sources.

Property	Thermoascus aurantiacus	Vibrio rumoiensis S-1^T	Vibrio salmonicida	Serratia marcescens SYBC08	Halomonas sp. SK1	Acinetobacter sp. YS0810
A405/A280 ratio	1.02	0.93	1	0.42	n.d.	0.68
Subunit mass (kD)	75	57	57	58	68	57
Subunits	4	4	4	4	4	4
Optimal pH	6–10	6–10	8.8	7.0–9.0	10	11
Optimal temperature/°C	70	40	0~10	20	n.d.	60
Temperature stability (ResidueActivity)	60°C, 60 min, 100%	60°C, 15 min, 0%	60°C, 20 min, 0%	70°C, 90 min, 57%	55°C, 30 min, 0%	60°C, 30 min, 78%

n. d. means not determined.