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S-Adenosyl methionine (SAM), also known under the commercial names of SAMe, SAM-e, or AdoMet, is a common cosubstrate involved in methyl group transfers, transsulfuration, and aminopropylation. Although these anabolic reactions occur throughout the body, most SAM is produced and consumed in the liver. [ 1 ]
The systematic name of this enzyme class is S-adenosyl-L-methionine:1D-myo-inositol 4-methyltransferase. Other names in common use include myo-inositol 4-O-methyltransferase , S-adenosyl-L-methionine:myo-inositol 4-O-methyltransferase , and myo-inositol 6-O-methyltransferase .
Thus, the two substrates of this enzyme are S-adenosyl methionine and isoliquiritigenin, whereas its two products are S-adenosylhomocysteine and 2'-O-methylisoliquiritigenin. This enzyme belongs to the family of transferases , specifically those transferring one-carbon group methyltransferases.
2 S-adenosyl-L-methionine + adenine 2085 in 23S rRNA 2 S-adenosyl-L-homocysteine + N 6-dimethyladenine 2085 in 23S rRNA ErmC is a methyltransferase that confers resistance to the macrolide - lincosamide - streptogramin B group of antibiotics by catalysing the methylation of 23S rRNA at adenine 2085 .
The systematic name of this enzyme class is S-adenosyl-L-methionine:rRNA (adenine-N6-)-methyltransferase. Other names in common use include ribosomal ribonucleate adenine 6-methyltransferase , gene ksgA methyltransferase , ribonucleic acid-adenine (N6) methylase , ErmC 23S rRNA methyltransferase , and S-adenosyl-L-methionine:rRNA (adenine-6-N ...
The systematic name of this enzyme class is S-adenosyl-L-methionine:calmodulin-L-lysine N6-methyltransferase. Other names in common use include S-adenosylmethionine:calmodulin (lysine) N-methyltransferase , and S-adenosyl-L-methionine:calmodulin-L-lysine 6-N-methyltransferase .
The systematic name of this enzyme class is S-adenosyl-L-methionine:tRNA (guanine-N1-)-methyltransferase. Other names in common use include transfer ribonucleate guanine 1-methyltransferase , tRNA guanine 1-methyltransferase , and S-adenosyl-L-methionine:tRNA (guanine-1-N-)-methyltransferase .
S-adenosyl-L-methionine + glycine S-adenosyl-L-homocysteine + sarcosine. Thus, the substrates of this enzyme are S-adenosyl methionine and glycine, whereas its two products are S-adenosylhomocysteine and sarcosine. Glycine N-methyltransferase belongs to the family of methyltransferase enzymes.