L-glutaminyl-[ribosomal protein uL3] + S-adenosyl-L-methionine = N(5)-methyl-L-glutaminyl-[ribosomal protein uL3] + S-adenosyl-L-homocysteine + H(+)
l-glutaminyl-[ribosomal protein ul3] + s-adenosyl-l-methionine = n(5)-methyl-l-glutaminyl-[ribosomal protein ul3] + s-adenosyl-l-homocysteine + h(+)