Unexpected Dual Function of Plant YUCCA Enzymes Links Chlorophyll Catabolism to Auxin Homeostasis
Angewandte Chemie, EarlyView.YUCCA enzymes are well known to catalyze the main step of auxin biosynthesis in plants. Here, a hitherto undescribed dual function was discovered, revealing that some YUCCAs also act in chlorophyll degradation. In vitro feedback regulation furthermore suggests a link between chlorophyll degradation and hormone homeostasis and a physiological role of ...
Sina Rütschlin +6 more
wiley +2 more sources
Epimers vs. inverse epimers: the C-1 configuration in alnumycin A1
RSC Advances, 2012 The determination of whether two stereoisomers constitute an epimeric pair or if they differ in their configuration at all stereogenic centers bar one can be deceptive, and even more problematic than just absolute configuration determination per se. The latter stereochemical relationship is hereby defined as a pair of inverse epimers and is exemplified
Petri Tähtinen +6 more
openaire +2 more sources
Molecules, 2014 Glycyrrhizin (GA) analogs in the form of 3-glucuronides and 18-epimers were synthesized and their anticancer activities were evaluated. Alkaline isomerization of monoglucuronides is reported.
Yong-An Yang +5 more
doaj +1 more source
Syntheses of Natural (–)-Osmundalactone and Its Epimer [PDF]
Agricultural and Biological Chemistry, 1986 (–)-Osmundalactone, an aglycone of osmundalin, and its 5-epimer were synthesized from 3-triethylsiloxy-1-propyne and from (S)-1-methyl-2-oxoethyl benzoate, which was derived from 2,3-O-cyclohexylidene-d-glyceraldehyde.
Tetsuya MURAYAMA +2 more
openaire +2 more sources
A New Languidulane Diterpenoid from Salvia mexicana var. mexicana
Molecules, 2011 From the aerial parts of Salvia mexicana var. mexicana, two C-10 epimers (α and β) of salvimexicanolide were isolated. Our interpretation of the data, especially the 13C NMR, led us to conclude that the previously described 13C-NMR spectrum of the α ...
Jorge Cárdenas +5 more
doaj +1 more source
Synthesis of Cyclophellitol Utilizing a Palladium Chloride Mediated-Ferrier-II Rearrangement
Molecules, 2005 Cyclophellitol and its C3-epimer have been synthesized from5-enoglucopyranoside and 5-enomannopyranoside, respectively. The carbocyclic skeletonwas constructed through a Ferrier-II reaction meditated by PdCl2.
S. Ikegami, H. Takahashi
doaj +1 more source
Lactose as an inexpensive starting material for the preparation of aldohexos-5-uloses: synthesis of L-ribo and D-lyxo derivatives [PDF]
, 2010 SUMMARY: Partially protected derivatives of L-ribo- and D-lyxo-aldohexos-5-ulose have been prepared starting from triacetonlactose dimethyl acetal derivatives.
Catelani, Giorgio +2 more
core +1 more source
The total synthesis of D-chalcose and its C-3 epimer
Beilstein Journal of Organic Chemistry, 2013 We completed a new and efficient synthesis of D-chalcose (I) and the first synthesis of its C-3 epimer (I′) in nine steps with overall yields of 23% and 24%, respectively.
Jun Sun +5 more
doaj +1 more source
Ternatin and improved synthetic variants kill cancer cells by targeting the elongation factor-1A ternary complex. [PDF]
, 2015 Cyclic peptide natural products have evolved to exploit diverse protein targets, many of which control essential cellular processes. Inspired by a series of cyclic peptides with partially elucidated structures, we designed synthetic variants of ternatin,
Carelli, Jordan D +8 more
core +2 more sources
The Trypanosoma cruzi enzyme TcGPXI is a glycosomal peroxidase and can be linked to trypanothione reduction by glutathione or tryparedoxin. [PDF]
, 2002 Trypanosoma cruzi glutathione-dependent peroxidase I (TcGPXI) can reduce fatty acid, phospholipid, and short chain organic hydroperoxides utilizing a novel redox cycle in which enzyme activity is linked to the reduction of trypanothione, a parasite ...
Bromley, Elizabeth V +5 more
core +4 more sources