Production of L-carnitine by secondary metabolism of bacteria

Table 1 Comparison of cai operon codified proteins in E. coli and Proteus sp. strains [4,15,19]

Gene	Protein length (aa)		Function of gene product	Homology (%)	Reference
	E. coli	Proteus sp.
caiT	504	504	Transport protein*	88	[20,21]
caiA	380	380	Crotonobetainyl-CoA reductase	93	[16,65]
caiB	405	406	Betainyl-CoA transferase	86	[22,24,25]
caiC	524	518	Betainyl-CoA ligase*	69	[26]
caiD	297	261	Crotonobetainyl-CoA hydratase	82	[24,25,60]
caiE	203	197	Unknown	76	[15,19]
caiF	131	130	Transcriptional regulator*	51	[19,27]

(*) In Proteus sp. strain, function postulated on the basis of sequence similarities [19].

ISSN: 1475-2859