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2.1.1.199
malfunction
enzyme deletion affects efficiency of non-AUG initiation and the fidelity of translation
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,
735241
2.1.1.199
malfunction
strain DELTAmraW produces monomethylated cytosine1402 instead of dimethylated C1402 produced by the wild-type enzyme
705980
2.1.1.199
more
RsmH in complex with S-adenosyl-L-methionine and cytidine consists of two distinct but structurally related domains: the typical MTase domain and the putative substrate recognition and binding domain. A deep pocket occurs in the conserved AdoMet binding domain, cytidine binds far from S-adenosyl-L-methionine with the distance of 25.9 A, The complex is not in a catalytically active state, and structural rearrangement of RsmH or the nucleotides neighboring C1402 may be necessary to trigger catalysis
720342
2.1.1.199
physiological function
both the 2'-O-methylation (catalyzed by RsmI) and N4-methylation of C1402 (catalyzed by RsmH) are needed for efficient initiation at the UUG and GUG codon. m4Cm1402 in the 16S rRNA modulates the accuracy of P-site function. The modification is needed for efficient translation initiation at the UUG and GUG codons
705980
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