. 2023 Jul 1;299(8):105005. doi: 10.1016/j.jbc.2023.105005

Table 3.

Kinetic constants determined for AdoMetDC (SpeD) homologues assayed with L-ornithine

Species	Protein	K_m (mM)	k_cat (s⁻¹)	k_cat/K_m (M⁻¹s⁻¹)
Ca. Kaiserbacteria bacterium	OGG79367	0.056 ± 0.002	0.061 ± 0.003	1100 ± 58
Methanogenium cariaci JCM 10550	WP_062398326	0.044 ± 0.003	0.041 ± 0.002	920 ± 31
Ca. Sumerlaeota bacterium	MBN1518199	0.021 ± 0.0013	0.010 ± 0.0010	470 ± 78
Ca. Electrothrix aarhusiensis	RWX43081	0.089 ± 0.013	0.030 ± 0.0030	340 ± 20
Methanolacinia petrolearia DSM 11571	WP_048130809	0.24 ± 0.002	0.057 ± 0.002	240 ± 11
Methanospirillum hungatei JF-1	WP_011448617	0.23 ± 0.018	0.050 ± 0.0002	220 ± 18
Ca. Velamenicoccus archaeovorus LiM	WP_128700171	0.073 ± 0.0032	0.008 ± 0.0004	113 ± 20

No activity was detected with L-arginine or L-lysine as substrates. All assays performed in triplicate at 26 °C (mean ± S.D.).