Zhen Zhang

East China Normal University, Shanghai, Shanghai Shi, China

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Publications (3)8.76 Total impact

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    ABSTRACT: Megastigmane glycosides (1-5) together with seven (6-12) related known compounds were isolated from the whole plants of Gynostemma pentaphyllum. The structures were elucidated by means of spectroscopic methods, including 2D NMR, HR-ESIMS, and circular dichroism (CD), as well as chemical transformations to be (3R,4R,5S,6S,7E)-3,4,6-trihydroxymegastigmane-7-en-9-one-3-O-beta-D-glucopyranoside (gynostemoside A, 1), (3S,4S,5R,6R,7E,9R)-3,4,6,9-tetrahydroxymegastigmane-7-en-3-O-beta-D-glucopyranoside (gynostemoside B, 2), (3S,4S,5S,6S,7E,9R)-3,4,9-trihydroxymegastigmane-7-en-9-O-beta-D-glucopyranoside (gynostemoside C, 3), (3S,4S,5S,6S,7E,9R)-3,4,9-trihydroxymegastigmane-7-en-3-O-beta-D-glucopyranoside (gynostemoside D, 4), and (3S,4S,5S,6S,7E,9R)-3,4,9-trihydroxymegastigmane-7-en-4-O-beta-D-glucopyranoside (gynostemoside E, 5), respectively.
    Phytochemistry 04/2010; 71(5-6):693-700. · 3.35 Impact Factor
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    Yanping Ji, Zhen Zhang, Yinghe Hu
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    ABSTRACT: The G-protein-coupled receptor (GPCR) superfamily represents the largest protein family in the human genome. These proteins have a variety of physiological functions that give them well recognized roles in clinical medicine. In Xenopus tropicalis, a widely used animal model for physiology research, the repertoire of GPCRs may help link the GPCR evolutionary history in vertebrates from teleost fish to mammals. We have identified 1452 GPCRs in the X. tropicalis genome. Phylogenetic analyses classified these receptors into the following seven families: Glutamate, Rhodopsin, Adhesion, Frizzled, Secretin, Taste 2 and Vomeronasal 1. Nearly 70% of X. tropicalis GPCRs are represented by the following three types of receptors thought to receive chemosensory information from the outside world: olfactory, vomeronasal 1 and vomeronasal 2 receptors. X. tropicalis shares a more similar repertoire of GPCRs with mammals than it does with fish. An examination of the three major groups of receptors related to olfactory/pheromone detection shows that in X. tropicalis, these groups have undergone lineage specific expansion. A comparison of GPCRs in X. tropicalis, teleost fish and mammals reveals the GPCR evolutionary history in vertebrates.
    BMC Genomics 07/2009; 10:263. · 4.40 Impact Factor
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    ABSTRACT: Nine fructose-derived carbohydrates were obtained from the methanol extract from the rhizome of Alisma orientalis. On the basis of spectroscopic analysis, their structures were determined to be alpha-D-fructofuranose (1), beta-D-fructofuranose (2), ethyl alpha-D-fructofuranoside (3), ethyl beta-D-fructofuranoside (4), 5-hydroxymethyl-furaldehyde (5), sucrose (6), raffinose (7), stachyose (8) and verbascose (9), along with two oligosaccharides of manninotriose (10) and verbascotetraose (11). Compounds 3, 4 and 7-11 were isolated from this plant for the first time. A hypothetical biosynthesis pathway among these isolated carbohydrates (1-11) was briefly introduced.
    Natural product research 02/2009; 23(11):1013-20. · 1.01 Impact Factor

Publication Stats

35 Citations
8.76 Total Impact Points

Institutions

  • 2010
    • East China Normal University
      • School of Life Sciences
      Shanghai, Shanghai Shi, China