Figure 2.
Amino acid substitutions F36S and R41P specifically interfere with the ability of MvaT to form higher-order oligomers. (A) Effect of λCINTD, λCINTD-MvaT, λCINTD-MvaT (F36S) or λCINTD-MvaT (R41P) proteins on transcription in vivo from PRM in the presence of α-MvaT. BN30 cells containing compatible plasmids directing the synthesis of the indicated proteins were grown and assayed for β-galactosidase activity. (B) Transcription repression by the λCINTD-MvaT, λCINTD-MvaT (F36S), and λCINTD-MvaT (R41P) fusion proteins. FW123 cells harboring plasmids directing the IPTG-dependent synthesis of the indicated proteins were grown in the presence of 20 µM IPTG and assayed for β-galactosidase activity.