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Articles by Ye Yang
Total Records ( 4 ) for Ye Yang
  Haiqing Yu , Chun Zhang , Zhiqiang Mei , Li Wang , Juan Li , Chenggang Duan , Xiaoyan Liu , Shu Gong , Lin Gan , Zhonghua Tao , Fuli Yao , Ye Yang , Chunyan Duan , Youping Liu , Chunyan Zhang , Chuanning Chen , Xiaoli Zheng , Hongxian Zhao , Jiyan Cheng , Xiaojun Tang , Yong Zhang , Yingxi Zhang and Junjiang Fu
  As a traditional medicinal herb in China, Penthorum chinense Push from Gulin county is regarded as genuine regional drug with better clinical effects. To discriminate the geographical origin of six P. chinense samples cultivated in three provinces, Randomly Amplified Polymorphic DNA (RAPD) analysis was carried out with an improved method to increase the resolution and production using 10 mer-random primers. Similarity index was ranged from 0.61 to 0.97, which demonstrated that samples from different localities displayed similar band patterns. However, based on the analysis of selected 13 primers, primers SBS-I9, SBS-I20 and SBS-Q9 produced distinguishable bands among Sichuan, Yunnan and Hubei P. chinense. T-test of mean S.I. values of six accessions demonstrated the significant differences between Luzhou or Sichuan samples and others. Cluster analysis indicated that cultivars with close geographic distributions were clustered together consequently. This suggested that there are RAPD site variations and local specialized genotypes among the six samples. The results indicated that RAPD analysis is effective in distinguishing the geographical origin of genuine regional drug P. chinense grown in Luhzou, Sichuan. The approach is a valuable tool to authenticate other morphologically similar herbal medicinal materials.
  Ye Yang , Jiao Song , Rui-Qi Fui , Yan-Fa Sun and JieWen
  The objective of this study was to assess the differential expression of CaN and CaMK during the improvement of lipogenesis in 2 strain chickens muscles. Twelve birds for each strain were slaughtered at 8 weeks for AA chickens and at 8, 16 weeks for BJY chickens. The results showed that the content of IMF and the expression of PPARγ, FAT/CD36 and FAS in muscle were significantly at 16 weeks higher than those for AA at 8 weeks and BJY at 8 weeks (p<0.05). Compared with AA chickens at 8 weeks, BJY at 16 weeks showed the significantly lower expression of CaN subunits and CaMK IV in muscle (p<0.05). But the expression of CaMK II was significantly higher at 16 weeks than 8 weeks in muscle (p<0.05). The expressions of C/EBPβ, SREBP1 and PPARγ were dramatically enhanced by CsA (p<0.05). KN93 dramatically repressed the expression of those lipogenic gene (p<0.05). These results indicated that CaN and CaMK had different effects on adipogenesis in the muscle of chickens.
  Feng Rao , Ye Yang , Yaning Qi and Zhao- Xun Liang
  EAL domain proteins are the major phosphodiesterases for maintaining the cellular concentration of second-messenger cyclic di-GMP in bacteria. Given the pivotal roles of EAL domains in the regulation of many bacterial behaviors, the elucidation of their catalytic and regulatory mechanisms would contribute to the effort of deciphering the cyclic di-GMP signaling network. Here, we present data to show that RocR, an EAL domain protein that regulates the expression of virulence genes and biofilm formation in Pseudomonas aeruginosa PAO-1, catalyzes the hydrolysis of cyclic di-GMP by using a general base-catalyzed mechanism with the assistance of Mg2+ ion. In addition to the five essential residues involved in Mg2+ binding, we propose that the essential residue E352 functions as a general base catalyst assisting the deprotonation of Mg2+-coordinated water to generate the nucleophilic hydroxide ion. The mutation of other conserved residues caused various degree of changes in the kcat or Km, leading us to propose their roles in residue positioning and substrate binding. With functions assigned to the conserved groups in the active site, we discuss the molecular basis for the lack of activity of some characterized EAL domain proteins and the possibility of predicting the phosphodiesterase activities for the vast number of EAL domains in bacterial genomes in light of the catalytic mechanism.
  Chengzhi Jin , Ye Yang , Longfei Jin , Lamei Wu and Jiang Zhang
  A macrocyclic hexanuclear iron(III) 18-metallacrown-6 complex, [Fe6(C9H6BrN2O3)6(CH3OH)4(H2O)2] . 7CH3OH . 4H2O, has been prepared using a trianionic pentadentate ligand N-acetyl-5-bromosalicylhydrazidate, abshz3−, and characterized by X-ray diffraction. The crystal structure contains a neutral 18-membered metallacrown ring consisting of six Fe(III) and six abshz3− ligands. The 18-membered metallacrown ring is formed by combination of six structural moieties, [Fe(III)−N−N]. Due to meridional coordination of ligand to Fe3+, the ligand enforces the stereochemistry of the Fe3+ ions as a propeller configuration with alternating Δ/Λ forms. Methanol and water are linked with Fe1, Fe1A, Fe,3 and Fe3A. The ratios of methanol to water are 0.76 : 0.24 for Fe1 and Fe1A, and 0.30 : 0.70 for Fe3 and Fe3A, which results in four component crystals of metallacrown rings with ratio of 0.168 : 0.072 : 0.532 : 0.228. Antibacterial screening data showed that the iron metallacrown has moderate antimicrobial activity against Bacillus subtilis.
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