Curiouser and curiouser: progress in understanding the programming of iterative highly-reducing polyketide synthases.

Area of Science:

• Biochemistry
• Molecular Biology
• Biotechnology

Background:

• Fungal iterative highly-reducing polyketide synthases (hr-PKS) are complex molecular machines.
• Understanding their programming has been a focus of research for over two decades.
• Intrinsic and extrinsic selectivity of catalytic domains play crucial roles in hr-PKS function.

Purpose of the Study:

• To review the progress in understanding fungal hr-PKS programming.
• To highlight the potential for engineering these systems for biotechnology.

Main Methods:

• Review of in vitro and in vivo experimental findings.
• Analysis of high-resolution structural biology data of hr-PKS.
• Discussion of engineering and reprogramming strategies.

Main Results:

• Investigations reveal the interplay of intrinsic and extrinsic selectivity in hr-PKS.
• High-resolution structures of hr-PKS are becoming available.
• Current progress in engineering hr-PKS remains rudimentary but promising.

Conclusions:

• Significant opportunities exist to rationally re-engineer hr-PKS.
• This could lead to the biotechnological production of valuable bioactive compounds.
• Further research can translate current understanding into practical applications.