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排序方式: 共有347条查询结果,搜索用时 437 毫秒
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Serum antioxidant enzyme activity in Parkinson's disease 总被引:2,自引:0,他引:2
Jawahar Kalra Ali H. Rajput Subrahmanyam V. Mantha Kailash Prasad 《Molecular and cellular biochemistry》1992,110(2):165-168
Summary The activities of superoxide dismutase (SOD; EC 1.15.1.1) and glutathione peroxidase (GSHPx; EC 1.11.1.9.), the enzymes that metabolize the superoxide anion and hydrogen peroxide, respectively, were measured in serum
from healthy subjects and patients with Parkinson's disease (PD). The activities of SOD and GSHPx in patients with PD were higher than those in normal healthy individuals. These results suggest that the increased activities
of these enzymes could be due to oxidative stress in the initial stages of this disease. 相似文献
3.
N. Vijaya Bhanu S. P. S. Khanuja M. L. Lodha 《Journal of plant biochemistry and biotechnology.》1994,3(1):19-24
The hup gene fragment of cosmid pHU52 was integrated into the genome of chickpea-Rhizobium Rcd301 via site-specific homologous recombination. Two small fragments of genomic DNA of strain Rcd301 itself were provided to flank cloned hup genes to facilitate the integration. The hup insert DNA of cosmid pHU52 was Isolated as an Intact 30.2 kb fragment using EcoRI, and cloned on partially restricted cosmid clone pSPSm3, which carries a DNA fragment of strain Rcd301 imparting streptomycin resistance. One of the recombinant cosmid clones, pBSL 12 thus obtained was conjugally transferred to the strain Rcd301. The integration of hup gene fragment into the genomic DNA through site-specific homologous recombination, was ensured by introducing an incompatible plasmid, pPH1 JI. The integration was confirmed by Southern hybridization. The integrated hup genes were found to express ex plants in two such constructs BSL 12–1 and BSL 12–3. 相似文献
4.
A porcine glucosephosphate isomeraseprocessed pseudogene has been isolated and sequenced. The pseudogene has several base substitutions as well as an insertion and deletions, and is 83% homologous to the corresponding cDNA. It contains an intervening sequence of 565 bp, is truncated at the 3 end, and is flanked by direct repeats of seven nucleotides. Fluorescent in situ hybridization to porcine metaphase chromosomes localized the processed pseudogene to Chromosome (Chr) 1q1.6-1.7. A (GT)14(AT)15 microsatellite was detected close to the processed pseudogene. 相似文献
5.
Evidence is presented in support of a pathway in skeletal muscle of glyconeogenesis (glycogen biosynthesis de novo) from L-glutamate and related amino acids involving the enzyme phosphoenolpyruvate carboxykinase (PEP CK). In the rat hemidiaphragm in vitro, not only did L-[U-14C]glutamate exert a glycogen-sparing action, but14C-label was incorporated into glycogen. The incorporation is thought not to be simply via label randomization and was decreased by factors that increased glycolysis or pyruvate oxidation. 3-Mercaptopicolinate and amino-oxyacetate, specific inhibitors of PEP CK and aminotransferase-type enzymes, respectively, decreased14C-incorporation from L-[U-14C]glutamate into glycogen. No quantitative determination of apparent glyconeogenic flux was made, and it remains to be established whether glyconeogenesis via PEP CK and/or via PEP CK coupled with 'malic' enzyme (or pyruvate carboxylase) is functionally important in skeletal muscle. 相似文献
6.
Babar Khan Shuangshuang Zhao Zhiyang Wang Yonghao Ye Nasir Ahmed Rajput Wei Yan 《化学与生物多样性》2021,18(4):e2000949
Three new eremophilane sesquiterpenes phomadecalins G−I ( 1 – 3 ) and two new benzene derivatives microdiplzenes A and B ( 12 and 13 ), together with nine known eremophilane sesquiterpenes ( 4 – 11 and 14 ) were isolated from an endophytic fungus, Microdiplodia sp. WGHS5. Their structures were elucidated by the interpretation of HR-ESI-MS and NMR data; meanwhile, the absolute configurations of new compounds were determined on the base of ECD calculations. All compounds were evaluated for the antimicrobial activities and antiproliferative effect on human gastric cancer cell lines (BGC-823). 相似文献
7.
Bhanu Raj Meena Sanjeev Meena Deepali Chittora Kanika Sharma 《Biochemistry and Biophysics Reports》2021
Alternaria solani, a plant pathogenic fungus causes significant economical losses of potato crop. The disease is controlled primarily through some traditional methods and most commonly via the application of chemical fungicides. Fungicides treatment is not protected as chemicals pollute environment, effect health vulnerability in humans and when these harmful chemicals enter into the food chain become hazardous to all living entities. Recent efforts have focused on developing environmentally safe, long-lasting, and effective biocontrol methods for the management of plant diseases. Present research focus on screening of crude and partially purified leaf extract of Thevetia peruviana for the presence of antifungal efficacy against Alternarai solani. It was observed that 100% alcoholic crude and alcoholic fraction of partially purified extract showed maximum inhibitory activity which is due to the presence of different secondary metabolites, revealed by phytochemical screening. Active column fraction (possess best antifungal activity against Alternaria solani) was subjected to Gas Chromatography-Mass Spectrometry (GS-MS) analysis. On the basis of peaks matching of GC-MS chromatogram with available data base showed the presence of benzoic acid and oxo-benzoate in active fraction of Thevetia peruviana leaf extract which is already known chemical among the phytochemicals described for antimicrobial activity. Further research on development of herbal formulation from the same would be very helpful environment friendly approach to manage concern crop disease. 相似文献
8.
Jonathan C Fuller Pierre Khoueiry Holger Dinkel Kristoffer Forslund Alexandros Stamatakis Joseph Barry Aidan Budd Theodoros G Soldatos Katja Linssen Abdul Mateen Rajput 《EMBO reports》2013,14(4):302-304
The third Heidelberg Unseminars in Bioinformatics (HUB) was held on 18th October 2012, at Heidelberg University, Germany. HUB brought together around 40 bioinformaticians from academia and industry to discuss the ‘Biggest Challenges in Bioinformatics’ in a ‘World Café’ style event. 相似文献
9.
Rinky Rajput Ved Vrat Verma Vishal Chaudhary Rani Gupta 《Extremophiles : life under extreme conditions》2013,17(1):29-41
??-Glutamyl transpeptidase of a thermo-acidophilic archaeon Picrophilus torridus was cloned and expressed using E. coli Rosetta-pET 51b(+) expression system. The enzyme was expressed at 37 °C/200 rpm with ??-GT production of 1.99 U/mg protein after 3 h of IPTG induction. It was improved nearby 10-fold corresponding to 18.92 U/mg protein in the presence of 2 % hexadecane. The enzyme was purified by Ni2+-NTA with a purification fold of 3.6 and recovery of 61 %. It was synthesized as a precursor heterodimeric protein of 47 kDa with two subunits of 30 kDa and 17 kDa, respectively, as revealed by SDS-PAGE and western blot. The enzyme possesses hydrolase activity with optima at pH 7.0 and 55 °C. It was thermostable with a t 1/2 of 1 h at 50 °C and 30 min at 60 °C, and retained 100 % activity at 45 °C even after 24 h. It was inhibited by azaserine and DON and PMSF. Pt??-GT shared 37 % sequence identity and 53 % homology with an extremophile ??-GT from Thermoplasma acidophilum. Functional residues identified by in silico approaches were further validated by site-directed mutagenesis where Tyr327 mutated by Asn327 introduced significant transpeptidase activity. 相似文献
10.
Tahsin Gulzar Nizam Uddin Bina Shaheen Siddiqui Syed N.H. Naqvi Sabira Begum Rajput Muhammed Tariq 《Phytochemistry letters》2013,6(2):219-223
Six bioactive compounds were isolated from the seeds extract of Piper nigrum Linn. following a larvicidal activity guided isolation against 4th instar larvae of Aedes aegypti L., a Dengue vector mosquito and a carrier of yellow fever. Their structures were elucidated using spectroscopic methods including HR-EI-MS, FAB-MS, 1H and 13C NMR (Broad Bond Decoupled, & DEPT), and 2D-NMR techniques (1H–1H COSY, NOESY, HMQC, HMBC, & 2D-J-resolved). These include three new constituents namely pipilyasine (1), pipzubedine (2) and pipyaqubine (3), and three known constituents pellitorine (4), pipericine (5) and piperine (6). The larvicidal activity was determined by WHO method. 相似文献