Sulfated Purine Alkaloid Glycosides from the Pupal Case Built by the Bruchid Beetle Bruchidius dorsalis Inside the Seed of Gleditsia japonica

2018 ◽  
Vol 15 (8) ◽  
pp. e1800154 ◽  
Author(s):  
Yui Harauchi ◽  
Kyo Muranaka ◽  
Emi Ohta ◽  
Hiroyuki Kawachi ◽  
Aya Imamura-Jinda ◽  
...  
Keyword(s):  
Purine Alkaloid

THE DISCOVERY AND IDENTIFICATION OF A NEW PURINE ALKALOID IN TEA

Science ◽  
1937 ◽  
Vol 85 (2209) ◽  
pp. 431-431 ◽  
Author(s):  
T. B. Johnson
Keyword(s):  
Purine Alkaloid

Dioicine: A Novel Prenylated Purine Alkaloid from Gymnocladus dioicus

Heterocycles ◽  
2009 ◽  
Vol 79 (1) ◽  
pp. 583 ◽  
Author(s):  
Richard W. Fitch ◽  
Rachael R. Chase ◽  
Thomas F. Spande ◽  
H. Martin Garraffo ◽  
John W. Daly ◽  
...  
Keyword(s):  
Purine Alkaloid

scholarly journals Biosynthesis of Caffeine Underlying the Diversity of Motif B’ Methyltransferase

2015 ◽  
Vol 10 (5) ◽  
pp. 1934578X1501000 ◽  
Author(s):  
Fumiyo Nakayama ◽  
Kouichi Mizuno ◽  
Misako Kato
Keyword(s):  
Substrate Specificity ◽  
Biosynthetic Pathway ◽  
Catalytic Properties ◽  
Biosynthetic Pathways ◽  
Methyl Transferase ◽  
Purine Alkaloids ◽  
Purine Alkaloid

Caffeine (1,3,7-trimethylxanthine) and theobromine (3,7-dimethylxanthine) are well-known purine alkaloids in Camellia, Coffea, Cola, Paullinia, Ilex, and Theobroma spp. The caffeine biosynthetic pathway depends on the substrate specificity of N-methyltransferases, which are members of the motif B’ methyl-transferase family. The caffeine biosynthetic pathways in purine alkaloid-containing plants might have evolved in parallel with one another, consistent with different catalytic properties of the enzymes involved in these pathways.

Theacrine, a Purine Alkaloid Obtained fromCamellia assamicavar.kucha, Attenuates Restraint Stress-Provoked Liver Damage in Mice

2013 ◽  
Vol 61 (26) ◽  
pp. 6328-6335 ◽  
Author(s):  
Wei-Xi Li ◽  
Yi-Fang Li ◽  
Yu-Jia Zhai ◽  
Wei-Min Chen ◽  
Hiroshi Kurihara ◽  
...  
Keyword(s):  
Liver Damage ◽  
Restraint Stress ◽  
Purine Alkaloid

Locustoside A — A new purine alkaloid glucoside from seeds of Gleditsia japonica

2010 ◽  
Vol 3 (4) ◽  
pp. 198-200 ◽  
Author(s):  
Tadashi Kajimoto ◽  
Nobuwa Aoki ◽  
Emi Ohta ◽  
Shinji Ohta
Keyword(s):  
Purine Alkaloid

Enhancing the release and plant uptake of PAHs with a water-soluble purine alkaloid

Chemosphere ◽  
2009 ◽  
Vol 76 (8) ◽  
pp. 1109-1113 ◽  
Author(s):  
Ronald R. Navarro ◽  
Hiroyasu Ichikawa ◽  
Kengo Morimoto ◽  
Kenji Tatsumi
Keyword(s):  
Plant Uptake ◽  
Water Soluble ◽  
Purine Alkaloid

scholarly journals Metabolism of Purine Alkaloids and Xanthine in Leaves of Maté (Ilex paraguariensis)

2015 ◽  
Vol 10 (5) ◽  
pp. 1934578X1501000
Author(s):  
Yuling Yin ◽  
Riko Katahira ◽  
Hiroshi Ashihara
Keyword(s):  
Ilex Paraguariensis ◽  
Metabolic Fate ◽  
Mature Leaves ◽  
Purine Alkaloids ◽  
Purine Alkaloid ◽  
Alkaloid Synthesis ◽  
Caffeine Biosynthesis ◽  
Alkaloid Metabolism ◽  
Leaf Disks

Accumulation and metabolism of purine alkaloids in leaves of maté ( Ilex paraguariensis) were investigated. In winter, leaves accumulated caffeine but not theobromine, indicating that caffeine is the end product of purine alkaloid synthesis in maté. To elucidate the purine alkaloid metabolism in maté leaves, the metabolic fate of [8-14C]theobromine, [8-14C]theophylline, [8-14C]caffeine and [8-14C] xanthine was investigated in the leaf disks of young and mature leaves. In young maté leaves, significant amounts of theobromine and theophylline were utilized for caffeine biosynthesis, but the conversion was not observed in mature leaves. A small amount of theophylline was converted to theobromine. Practically no caffeine catabolism was detected in maté leaves during a 24 h-incubation. Catabolism of theobromine and theophylline via 3-methylxanthine was observed mainly in mature leaves. Xanthine was catabolised extensively via ureides in both young and mature leaves, but limited amounts are also utilized for the synthesis of theobromine, theophylline and caffeine. Possible pathways for the metabolism of purine alkaloids in maté leaves are discussed.

Theacrine: A purine alkaloid from Camellia assamica var. kucha with a hypnotic property via the adenosine system

2017 ◽  
Vol 659 ◽  
pp. 48-53 ◽  
Author(s):  
Haoyi Qiao ◽  
Xiansheng Ye ◽  
Xiaoyu Bai ◽  
Jun He ◽  
Tingli Li ◽  
...  
Keyword(s):  
Purine Alkaloid

Theacrine, a purine alkaloid with anti-inflammatory and analgesic activities

Fitoterapia ◽  
2010 ◽  
Vol 81 (6) ◽  
pp. 627-631 ◽  
Author(s):  
Yuanyuan Wang ◽  
Xiaorong Yang ◽  
Xinqiang Zheng ◽  
Jing Li ◽  
Chuangxing Ye ◽  
...  
Keyword(s):  
Purine Alkaloid ◽  
Anti Inflammatory ◽  
Analgesic Activities

Molecular and biochemical characterization of caffeine synthase and purine alkaloid concentration in guarana fruit

2014 ◽  
Vol 105 ◽  
pp. 25-36 ◽  
Author(s):  
Flávia Camila Schimpl ◽  
Eduardo Kiyota ◽  
Juliana Lischka Sampaio Mayer ◽  
José Francisco de Carvalho Gonçalves ◽  
José Ferreira da Silva ◽  
...  
Keyword(s):  
Biochemical Characterization ◽  
Caffeine Synthase ◽  
Purine Alkaloid
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