The 2.1 A crystal structure of an acyl-CoA synthetase from Methanosarcina acetivorans reveals an alternate acyl-binding pocket for small branched acyl substrates.
Shah, M.B., Ingram-Smith, C., Cooper, L.L., Qu, J., Meng, Y., Smith, K.S., Gulick, A.M.(2009) Proteins 77: 685-698
- PubMed: 19544569 
- DOI: 10.1002/prot.22482
- Primary Citation of Related Structures:  
3ETC - PubMed Abstract: 
The acyl-AMP forming family of adenylating enzymes catalyze two-step reactions to activate a carboxylate with the chemical energy derived from ATP hydrolysis. X-ray crystal structures have been determined for multiple members of this family and, together with biochemical studies, provide insights into the active site and catalytic mechanisms used by these enzymes ...