Table 1.

M7G regulators for targeted RNAs

RNA	m7G types	Organisms	guanine-N7 MTase	Reference
tRNA	Internal m7G	Eubacteria	TrmB*	[133]
	Internal m7G	Yeast	Trm8*/Trm82	[134]
	Internal m7G	Mammalian	METTL1*/WDR4	[20]
	TMG-cap	Yeast	TGS1	[39]
mRNA	Internal m7G	Mammalian	METTL1*/WDR4	[34]
	m7G cap	vaccina virus	Abd1 (vD1*/vD2)	[135]
	m7G cap	Mammalian	RNMT (HCMT1)	[37]
miRNA	Internal m7G	Mammalian	METTL1*/WDR4	[33]
16S rRNA	Internal m7G	Streptomyces tenebrarius	KgmB	[40]
18S rRNA	Internal m7G	Yeast	Bud23-Trm112	[41]
	Internal m7G	Mammalian	WBSCR22	[23]
23S rRNA	Internal m7G	E. coli	YcbY (RlmKL)	[46]
sRNA	TMG-cap	Yeast, Mammalian	TGS1	[8]
TERC	TMG-cap	Mammalian	TGS1	[24,25]

^*Indicating catalytic subunits in complexes.