The biochemical characterization of a high-stearic acid sunflower mutant reveals the coordinated regulation of stearoyl-acyl carrier protein desaturases

2008 ◽  
Vol 46 (2) ◽  
pp. 109-116 ◽  
Author(s):  
Joaquín J. Salas ◽  
Loubna Youssar ◽  
Enrique Martínez-Force ◽  
Rafael Garcés
2000 ◽  
Vol 28 (6) ◽  
pp. 610-613 ◽  
Author(s):  
F. Domergue ◽  
D. Post-Beittenmiller

In order to define its possible involvement in production of stearic acid for wax biosynthesis, the presence of 3-ketoacyl acyl synthase II (KAS II) activity was investigated in different tissues of leek (Allium porrum L.) leaves. KAS II activity was identified in sheath and lamina epidermis, as well as in underlying parenchyma. In all three tissues, activity was inhibited by 50% on addition of l00μM cerulenin, and showed an absolute requirement for acyl-ACP substrates. More interestingly, the different tissues did not display similar KAS II substrate specificities. Parenchyma and lamina epidermis tissues presented typical KAS II activities, since C18 0-ACP was the exclusive product. In contrast, in sheath epidermis, KAS II activity resulted in the synthesis of acyl-chains up to 22 carbons in length, suggesting the existence in this tissue of an unusual KAS II. This activity was sufficient to elongate all of the palmitoyl-ACP produced by the fatty acid synthase, suggesting that C18 0 is the substrate of the microsomal elongases involved in wax biosynthesis.


2001 ◽  
Vol 276 (30) ◽  
pp. 27967-27974 ◽  
Author(s):  
Laurent Kremer ◽  
K. Madhavan Nampoothiri ◽  
Sarah Lesjean ◽  
Lynn G. Dover ◽  
Steven Graham ◽  
...  

2008 ◽  
Vol 102 (6) ◽  
pp. 1301-1309 ◽  
Author(s):  
George Dautu ◽  
Akio Ueno ◽  
Biscah Munyaka ◽  
Gabriella Carmen ◽  
Souichi Makino ◽  
...  

2017 ◽  
Vol 214 ◽  
pp. 152-160 ◽  
Author(s):  
Wangdan Xiong ◽  
Qian Wei ◽  
Pingzhi Wu ◽  
Sheng Zhang ◽  
Jun Li ◽  
...  

1999 ◽  
Vol 99 (3-4) ◽  
pp. 663-669 ◽  
Author(s):  
B. Pérez-Vich ◽  
R. Garcés ◽  
J. M. Fernández-Martínez

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