Comparison of the primary sequences of A. oryzae CsyB and other type III PKSs.
AoCsyB, A. oryzae PCS; AoCsyA, A. oryzae CsyA; NcORAS, N. crassa ORAS; OsCUS, O. sativa CUS; MtPKS18, M. tuberculosis PKS18. The secondary structures of CsyB are also delineated: α helices (blue rectangles), β strands (orange arrows), and loops (red, bold lines) are diagrammed. The catalytic triad of Cys-His-Asn is highlighted red. The residues thought to be important for the steric modulation of the active site in a number of divergent type III PKSs are highlighted in blue.