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Interazioni non covalenti - Structural Biology

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Tirosil-tRNA sintasi - aminoacilazione del tRNAtyr con tirosina<br />

E + Tyr + ATP [E·TyrAMP] + PPi<br />

ETyr-AMP + tRNA tyr E + Tyr-tRNA tyr + AMP<br />

Strategia:<br />

• Eliminare legame idrogeno con mutazione<br />

• Verificare struttura<br />

• Misura catalitica Ks ≈ 10 -9 M<br />

ΔΔG=-RTln[(k cat /K M ) MUT /(k cat /K M ) WT ]<br />

Fersht et al Nature 1985, 314, 235-238

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