Zinc is the molecular "switch" that controls the catalytic cycle of bacterial leucyl-tRNA synthetase
Journal of Inorganic Biochemistry (2015) - Comments
pubmed: 25450019  doi: 10.1016/j.jinorgbio.2014.09.006  issn: 1873-3344  issn: 0162-0134 

Manonmani Kumar, Sathish A.P. Kumar, Aleksandar Dimkovikj, Layla N. Baykal, Mallory J. Banton, Maya M. Outlaw, Kristen E. Polivka, Rachel A. Hellmann-Whitaker