TABLE 5.

SxxK acyltransferases of M. tuberculosis, M. leprae, C. diphtheriae, and S.coelicolor^a

Type	Class	PBP and Penr protein fusions						Similarity index vs M. tuberculosis						Gene environ- ment
		M. tuberculosis			M. leprae	C. diph- theriae	S. coelicolor	P (10−n)			I (%)
		Protein	Mr	kDa				M. leprae	C. diphtheriae	S. coelicolor	M. leprae	C. diphtheriae	S. coelicolor
PBP	A	0050 (Mtu1s)	71,151	94-82	2688 (Mle1s)	378	H24.23	∞	173	74	83	51	37
							E6.34			71			35
							K7.12			41			30
	B3	2163 (Mtu3)	72,506	94-82	0908 (Mle3)	101	4A10.23 (Sco3)	∞	163	82	80	51	33	dcw
	B2						C88.19 (Sco2)							mre, sfr
	B-like I	0016	51,776	52	0018	16	H69.17	∞	107	80	85	45	36	sfr
							6G9.32			79			39	sfr
							2st10A7			78			35
Penr	A	3682 (Mtu1r)	84,636		2308 (Mle1r)	338	H17.14	∞	∞	51	86	48	36
	B-like II	2864	63,015		1577	230		∞	118		80	41
	B-like III						H63.18			38*			27*
							E87.08			27*			34*
							E87.07			33*			33*

^aSimilarity indexes P and I apply to full-size protein fusions except for S. coelicolor protein fusions H63.18, E87.08, and E87.07 (*), where similarity with protein fusion Mtu2864 is restricted to the acyltransferase modules.