scholarly journals The diffusible factor (DF) synthase XanB2 is a bifunctional chorismatase that links the shikimate pathway to ubiquinone and xanthomonadins biosynthetic pathways

2013 ◽  
Vol 90 (2) ◽  
pp. 456-456
Keyword(s):  
Shikimate Pathway ◽  
Biosynthetic Pathways ◽  
Diffusible Factor

scholarly journals The diffusible factor synthase XanB2 is a bifunctional chorismatase that links the shikimate pathway to ubiquinone and xanthomonadins biosynthetic pathways

2012 ◽  
Vol 87 (1) ◽  
pp. 80-93 ◽  
Author(s):  
Lian Zhou ◽  
Jia-Yuan Wang ◽  
Jianhe Wang ◽  
Alan Poplawsky ◽  
Shuangjun Lin ◽  
...  
Keyword(s):  
Shikimate Pathway ◽  
Biosynthetic Pathways ◽  
Diffusible Factor

scholarly journals The serC-aro A operon of Escherichia coli. A mixed function operon encoding enzymes from two different amino acid biosynthetic pathways

1986 ◽  
Vol 234 (1) ◽  
pp. 49-57 ◽  
Author(s):  
K Duncan ◽  
J R Coggins
Keyword(s):  
Amino Acid ◽  
Biosynthetic Pathway ◽  
Shikimate Pathway ◽  
Biosynthetic Pathways ◽  
The Novel ◽  
Base Pairs ◽  
Reading Frame ◽  
E Coli ◽  
Phosphoserine Aminotransferase ◽  
Aroa Gene

Sub-cloning experiments aimed at precisely locating the E. coli aroA gene, which encodes the shikimate pathway enzyme 5-enolpyruvylshikimate 3-phosphate synthase, showed that in certain constructions, which remain capable of complementing an auxotrophic aroA mutation, expression of aroA is reduced. DNA sequence analysis revealed that a sequence approx. 1200 base pairs (bp) upstream of aroA is necessary for its expression. An open reading frame was identified in this region which encodes a protein of 362 amino acids with a calculated Mr of 39,834 and which ends 70 bp before the start of the aroA coding sequence. This gene has been identified as serC, the structural gene for 3-phosphoserine aminotransferase, an enzyme of the serine biosynthetic pathway. Both genes are expressed as a polycistronic message which is transcribed from a promotor located 58 bp upstream of serC. Evidence is presented which confirms that the aroA and serC genes constitute an operon which has the novel feature of encoding enzymes from two different amino acid biosynthetic pathways.

scholarly journals Recent highlights in biosynthesis research using stable isotopes

2015 ◽  
Vol 11 ◽  
pp. 2493-2508 ◽  
Author(s):  
Jan Rinkel ◽  
Jeroen S Dickschat
Keyword(s):  
Stable Isotopes ◽  
Secondary Metabolites ◽  
Aromatic Compounds ◽  
Shikimate Pathway ◽  
Isotopic Labeling ◽  
Biosynthetic Pathways ◽  
Comprehensive Overview ◽  
History Of ◽  
Biosynthetic Studies ◽  
Selection Of

The long and successful history of isotopic labeling experiments within natural products research has both changed and deepened our understanding of biosynthesis. As demonstrated in this article, the usage of isotopes is not at all old-fashioned, but continues to give important insights into biosynthetic pathways of secondary metabolites. This review with 85 cited references is structured by separate discussions of compounds from different classes including polyketides, non-ribosomal peptides, their hybrids, terpenoids, and aromatic compounds formed via the shikimate pathway. The text does not aim at a comprehensive overview, but instead a selection of recent important examples of isotope usage within biosynthetic studies is presented, with a special emphasis on mechanistic surprises.

Discovery of fatty acid synthase inhibitors and their biosynthetic pathways by a novel target-directed genome mining strategy

Planta Medica ◽  
2015 ◽  
Vol 81 (11) ◽  
Author(s):  
J Li ◽  
X Tang ◽  
JJ Zhang ◽  
EC O'Neill ◽  
SM Mantovani ◽  
...  
Keyword(s):  
Fatty Acid ◽  
Fatty Acid Synthase ◽  
Genome Mining ◽  
Biosynthetic Pathways ◽  
Novel Target

An Overview on Steroids and Microwave Energy in Multi-Component Reactions towards the Synthesis of Novel Hybrid Molecules

2020 ◽  
Vol 17 (8) ◽  
pp. 594-609
Author(s):  
Preetismita Borah ◽  
Vhatkar Dattatraya Shivling ◽  
Bimal Krishna Banik ◽  
Biswa Mohan Sahoo
Keyword(s):  
Energy Consumption ◽  
Multicomponent Reactions ◽  
Biological Activities ◽  
Vital Role ◽  
Microwave Energy ◽  
Biosynthetic Pathways ◽  
Chemical Transformations ◽  
Carbon Carbon Bond ◽  
Hybrid Molecules ◽  
Time Required

In recent years, hybrid systems are gaining considerable attention owing to their various biological applications in drug development. Generally, hybrid molecules are constructed from different molecular entities to generate a new functional molecule with improved biological activities. There already exist a large number of naturally occurring hybrid molecules based on both non-steroid and steroid frameworks synthesized by nature through mixed biosynthetic pathways such as, a) integration of the different biosynthetic pathways or b) Carbon- Carbon bond formation between different components derived through different biosynthetic pathways. Multicomponent reactions are a great way to generate efficient libraries of hybrid compounds with high diversity. Throughout the scientific history, the most common factors developing technologies are less energy consumption and avoiding the use of hazardous reagents. In this case, microwave energy plays a vital role in chemical transformations since it involves two very essential criteria of synthesis, minimizing energy consumption required for heating and time required for the reaction. This review summarizes the use of microwave energy in the synthesis of steroidal and non-steroidal hybrid molecules and the use of multicomponent reactions.

scholarly journals Full-Length Transcriptome of Thalassiosira weissflogii as a Reference Resource and Mining of Chitin-Related Genes

Marine Drugs ◽  
2021 ◽  
Vol 19 (7) ◽  
pp. 392
Author(s):  
Haomiao Cheng ◽  
Chris Bowler ◽  
Xiaohui Xing ◽  
Vincent Bulone ◽  
Zhanru Shao ◽  
...  
Keyword(s):  
Cell Wall ◽  
Full Length ◽  
Biosynthetic Pathways ◽  
Glycosidic Linkage ◽  
Thalassiosira Weissflogii ◽  
Ecological Value ◽  
Pacbio Sequencing ◽  
Non Coding Rnas ◽  
Chitin And Chitosan ◽  
Simple Sequence

β-Chitin produced by diatoms is expected to have significant economic and ecological value due to its structure, which consists of parallel chains of chitin, its properties and the high abundance of diatoms. Nevertheless, few studies have functionally characterised chitin-related genes in diatoms owing to the lack of omics-based information. In this study, we first compared the chitin content of three representative Thalassiosira species. Cell wall glycosidic linkage analysis and chitin/chitosan staining assays showed that Thalassiosira weissflogii was an appropriate candidate chitin producer. A full-length (FL) transcriptome of T. weissflogii was obtained via PacBio sequencing. In total, the FL transcriptome comprised 23,362 annotated unigenes, 710 long non-coding RNAs (lncRNAs), 363 transcription factors (TFs), 3113 alternative splicing (AS) events and 3295 simple sequence repeats (SSRs). More specifically, 234 genes related to chitin metabolism were identified and the complete biosynthetic pathways of chitin and chitosan were explored. The information presented here will facilitate T. weissflogii molecular research and the exploitation of β-chitin-derived high-value enzymes and products.

scholarly journals Meroterpenoids: A Comprehensive Update Insight on Structural Diversity and Biology

Biomolecules ◽  
2021 ◽  
Vol 11 (7) ◽  
pp. 957
Author(s):  
Mamona Nazir ◽  
Muhammad Saleem ◽  
Muhammad Imran Tousif ◽  
Muhammad Aijaz Anwar ◽  
Frank Surup ◽  
...  
Keyword(s):  
Amino Acids ◽  
Secondary Metabolites ◽  
Biological Effects ◽  
Structural Diversity ◽  
Chemical Diversity ◽  
Biosynthetic Pathways ◽  
Natural Sources ◽  
Hybrid Compounds ◽  
Anti Inflammatory

Meroterpenoids are secondary metabolites formed due to mixed biosynthetic pathways which are produced in part from a terpenoid co-substrate. These mixed biosynthetically hybrid compounds are widely produced by bacteria, algae, plants, and animals. Notably amazing chemical diversity is generated among meroterpenoids via a combination of terpenoid scaffolds with polyketides, alkaloids, phenols, and amino acids. This review deals with the isolation, chemical diversity, and biological effects of 452 new meroterpenoids reported from natural sources from January 2016 to December 2020. Most of the meroterpenoids possess antimicrobial, cytotoxic, antioxidant, anti-inflammatory, antiviral, enzyme inhibitory, and immunosupressive effects.

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