Crystal structure of a feruloyl esterase belonging to the tannase family with a disulfide bond near a catalytic triad is published by Suzuki et al. and will be available soon (3WMT). A novel "Silent" allele: point mutation (p.Val204Asp) in human butyrylcholinesterase is described by Delacour et al. Structures of carboxylesterases EstFa from Ferroplasma acidiphilum (3WJ2) and SshEstI from Sulfolobus shibatae (4P9N, 3WJ1) are available and published by Ohara et al. The last crystal structure of Pseudomonas putida esterase published by Dou et al. is available (4OU4)