ArticleChembiochem : a European journal of chemical biology2007
Generation of new landomycins with altered saccharide patterns through over-expression of the glycosyltransferase gene lanGT3 in the biosynthetic gene cluster of landomycin A in Streptomyces cyanogenus S-136.
Article in Chembiochem : a European journal of chemical biology, 2007. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 13 papers.
What it found
Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.
The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.
The trial behind it
Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.
Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.
Who cites it
13 citing papers in PubMed.
- Bioactive Angucyclines/Angucyclinones Discovered from 1965 to 2023.Marine drugs · 2025Review
- Anti-cancer and antimicrobial potential of five soilRoyal Society open science · 2022Article
- Automated, Multistep Continuous-Flow Synthesis of 2,6-Dideoxy and 3-Amino-2,3,6-trideoxy Monosaccharide Building Blocks.Angewandte Chemie (International ed. in English) · 2021Article
- Total synthesis of landomycins Q and R and related core structures for exploration of the cytotoxicity and antibacterial properties.RSC advances · 2021Article
- A comprehensive review of glycosylated bacterial natural products.Chemical Society reviews · 2015Review
- Saquayamycins G-K, cytotoxic angucyclines from Streptomyces sp. Including two analogues bearing the aminosugar rednose.Journal of natural products · 2012Article
- Delineation of gilvocarcin, jadomycin, and landomycin pathways through combinatorial biosynthetic enzymology.Current opinion in chemical biology · 2012Review
- Angucyclines: Biosynthesis, mode-of-action, new natural products, and synthesis.Natural product reports · 2012Review
- Landomycins P-W, cytotoxic angucyclines from Streptomyces cyanogenus S-136.Journal of natural products · 2011Article
- 11-Deoxylandomycinone and landomycins X-Z, new cytotoxic angucyclin(on)es from a Streptomyces cyanogenus K62 mutant strain.The Journal of antibiotics · 2011Article
- Properties of lanK-based regulatory circuit involved in landomycin biosynthesis in Streptomyces cyanogenus S136.Genetika · 2010Article
- Natural products version 2.0: connecting genes to molecules.Journal of the American Chemical Society · 2010Article
- Elucidation of oxygenation steps during oviedomycin biosynthesis and generation of derivatives with increased antitumor activity.Chembiochem : a European journal of chemical biology · 2009Article
Corrections and comments
PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.
Authors and funding
7 authors.
Funding
Abstract
Two novel landomycin compounds, landomycins I and J, were generated with a new mutant strain of Streptomyces cyanogenus in which the glycosyltransferase that is encoded by lanGT3 was over-expressed. This mutant also produced the known landomycins A, B, and D. All these compounds consist of the same polyketide-derived aglycon but differ in their sugar moieties, which are chains of different lengths. The major new metabolite, landomycin J, was found to consist of landomycinone with a tetrasaccharide chain attached. Combined with previous results of the production of landomycin E (which contains three sugars) by the LanGT3- mutant strain (obtained by targeted gene deletion of lanGT3), it was verified that LanGT3 is a D-olivosyltransferase responsible for the transfer of the fourth sugar required for landomycin A biosynthesis. The experiments also showed that gene over-expression is a powerful method for unbalancing biosynthetic pathways in order to generate new metabolites. The cytotoxicity of the new landomycins--compared to known ones--was assessed by using three different tumor cell lines, and their structure-activity relationship (SAR) with respect to the length of the deoxysugar side chain was deduced from the results.
Indexed as
Identifiers
What OpenQuestion holds
Registered trials
Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.