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Biosynthesis in bacteria is a fundamental anabolic process that generates essential macromolecules, including proteins, nucleic acids, lipids, and polysaccharides. These macromolecules are critical for cellular growth, replication, and function. The process is tightly regulated and energetically linked to catabolic pathways to ensure optimal resource utilization.Biosynthetic pathways begin with precursor metabolites such as pyruvate, acetyl-CoA, and glucose-6-phosphate derived from glycolysis,...
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Structure of PeptidoglycanPeptidoglycan is a vital structural component of the bacterial cell wall, providing mechanical strength and shape to the cell. It consists of repeating units of two sugars—N-acetylglucosamine (NAG) and N-acetylmuramic acid (NAM)—linked by β-1,4 glycosidic bonds. These sugar chains are cross-linked by short peptide chains, forming a mesh-like polymer that surrounds the bacterial plasma membrane.Cytoplasmic Phase – Precursor SynthesisPeptidoglycan...
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Synthetic biology is an interdisciplinary science that involves using principles from disciplines such as engineering, molecular biology, cell biology, and systems biology. It involves remodeling existing organisms from nature or constructing completely new synthetic organisms for applications such as protein or enzyme production, bioremediation, value-added macromolecule production, and the addition of desirable traits to crops, to name a few.
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Polysaccharides such as glycogen and starch are synthesized from nucleoside diphosphate sugars, primarily uridine diphosphate glucose (UDPG) and adenosine diphosphate glucose (ADPG). These activated glucose donors act as key intermediates in carbohydrate metabolism and biosynthesis. UDPG primarily involves glycogen synthesis in animals and many bacteria, while ADPG plays a fundamental role in starch synthesis in plants and certain bacteria.UDPG is formed when glucose-1-phosphate reacts with...
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Amino acid biosynthesis is essential for cell growth, protein synthesis, and metabolic regulation. Cells generate essential and non-essential amino acids from metabolic intermediates to sustain vital biological functions. These intermediates originate from key metabolic pathways: glycolysis, the tricarboxylic acid (TCA) cycle, and the pentose phosphate pathway. Important precursors include α-ketoglutarate, pyruvate, oxaloacetate, phosphoenolpyruvate, and erythrose-4-phosphate, which...
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From a Natural Product to Its Biosynthetic Gene Cluster: A Demonstration Using Polyketomycin from Streptomyces diastatochromogenes T&#252;6028
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Module-Based Polyketide Synthase Engineering for de Novo Polyketide Biosynthesis.

Alberto A Nava1,2,3, Jacob Roberts1,2,4, Robert W Haushalter1,2

  • 1Joint BioEnergy Institute, Lawrence Berkeley National Laboratory, Emeryville, California 94608, United States.

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|October 23, 2023
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Summary
This summary is machine-generated.

Polyketide retrobiosynthesis engineering offers vast molecular production potential. Novel module boundary strategies within polyketide synthases (PKSs) may enhance hybrid PKS activity, accelerating organic molecule synthesis.

Keywords:
polyketide synthasesprotein engineeringretrobiosynthesisstructural modeling

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Area of Science:

  • Synthetic biology and organic chemistry, focusing on polyketide biosynthesis.
  • Computational biology and structural modeling for enzyme engineering.

Background:

  • Polyketide retrobiosynthesis leverages the PKS structure-function colinearity for potential production of millions of organic molecules.
  • Current methods involve mixing and matching modules from natural polyketide synthases (PKSs).

Purpose of the Study:

  • To explore novel module boundary designs within PKSs for enhanced hybrid PKS productivity.
  • To re-evaluate existing PKS engineering insights using advanced structural modeling and synthetic biology tools.

Main Methods:

  • Analysis of evolutionary patterns in PKSs to identify optimal module boundaries.
  • Application of advanced structural modeling and synthetic biology techniques.

Main Results:

  • Evolutionary analysis suggests new module boundaries, particularly within the ketosynthase domain, may yield more active hybrid PKSs.
  • Existing engineering efforts' generality remains inconclusive, highlighting the need for re-evaluation.

Conclusions:

  • Redefining module boundaries in PKS engineering, informed by evolutionary insights and advanced tools, holds promise for increased efficiency.
  • Further research is needed to validate these design principles and fully realize the potential of polyketide retrobiosynthesis.