Rationally engineered variants of S-adenosylmethionine (SAM) synthase: reduced product inhibition and synthesis of artificial cofactor homologues
作者:M. Dippe、W. Brandt、H. Rost、A. Porzel、J. Schmidt、L. A. Wessjohann
DOI:10.1039/c4cc08478k
日期:——
Rational redesign of bacterialS-adenosylmethionine-synthase by 3D-modelling and docking led to variants that allow synthesis of methylation cofactor SAM (AdoMet) without product inhibition, and of higher alkyl homologues.
Amide-derived lysine analogues as substrates and inhibitors of histone lysine methyltransferases and acetyltransferases
作者:Jordi C. J. Hintzen、Jona Merx、Marijn N. Maas、Sabine G. H. A. Langens、Paul B. White、Thomas J. Boltje、Jasmin Mecinović
DOI:10.1039/d1ob02191e
日期:——
examined synthetic histone peptides as substrates and inhibitors for human lysinemethyltransferases and acetyltransferases. This work demonstrates that histone lysinemethyltransferases G9a and GLP do catalyse methylation of the most similar lysine mimic, whereas they typically do not tolerate more sterically demanding side chains. In contrast, histone lysine acetyltransferases GCN5 and PCAF do not
Synthesis of the organoarsenical antibiotic arsinothricin and derivatives thereof
申请人:Rosen Barry P.
公开号:US10934318B1
公开(公告)日:2021-03-02
The subject invention provides methods and procedures for synthesis and/or semi-synthesis of the novel antibiotic arsinothricin (AST) and derivatives. Arsinothricin (AST), a new broad-spectrum organoarsenical antibiotic, is a non-proteinogenic analog of glutamate that effectively inhibits glutamine synthetase. The subject invention provides chemical synthesis of an intermediate in the pathway of AST synthesis, hydroxyarsinothricin (AST-OH), which can be converted to AST by enzymatic methylation catalyzed by the ArsM As(III) S-adenosylmethionine methyltransferase. The methods provide a source of the novel antibiotic that will be required for future clinical trials. The subject invention also provides AST derivatives as a new class of antibiotics.
Aspirochlorine is an unusual antifungal cyclopeptide produced by Aspergillus oryzae, an important mold used for food fermentation. Whereas its structure suggested that a non‐ribosomal peptide synthetase assembles the cyclopeptide from phenylalanine and glycine building blocks, labeling studies indicated that one Phe moiety is transformed into Gly after peptide formation. By means of genetic engineering
Radical SAM‐Dependent Adenosylation Involved in Bacteriohopanepolyol Biosynthesis
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作者:Yuting Zhong、Xinjian Ji、Qi Zhang
DOI:10.1002/cjoc.201900399
日期:2020.1
HpnH does not initiate the reaction by a hydrogen atom abstraction process. Instead, it catalyzes the adenosylation of hopene via a radical addition reaction to produce adenosylhopane, representing the second example of radicalSAM‐dependentadenosylationinvolved in natural product biosynthesis.