GO:0006436:   tryptophanyl-tRNA aminoacylation
The process of coupling tryptophan to tryptophanyl-tRNA, catalyzed by tryptophanyl-tRNA synthetase. The tryptophanyl-tRNA synthetase is a class-I synthetase. The activated amino acid is transferred to the 2"-OH group of a tryptophan-accetping tRNA. The 2"-O-aminoacyl-tRNA will ultimately migrate to the 3" position via transesterification.