Catalysis of the reaction: histone H3-serine (position 10) + ATP = histone H3-phosphoserine (position 10) + ADP. This reaction is the addition of a phosphate group to the serine residue at position 10 of histone H3.
Catalysis of the reaction: guanosine(10) in tRNA + 2 S-adenosyl-L-methionine = 2 H(+) + N(2)-dimethylguanosine(10) in tRNA + 2 S-adenosyl-L-homocysteine.