passages.id: split_1_test_833_passage
passages.type: progene_text
passages.text: Based on secondary structures predictions and a secondary structure - driven multiple sequence alignment with remote homologous protein of known three - dimensional ( 3D ) structure , we previously hypothesized for this enzyme the alpha / beta-hydrolase fold typical of several lipases and esterases and identified Ser155 , Asp252 , and His282 as the putative members of the catalytic triad .