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991.
Seema Kumari R Gupta G Saluja D Kumar A Goel S Tyagi YK Gulati R Vinocha A Muralidhar K Dwarakanth BS Rastogi RC Parmar VS Patkar SA Raj HG 《Cell biochemistry and biophysics》2007,47(1):53-64
We have earlier shown that a unique membrane-bound enzyme mediates the transfer of acetyl group(s) from polyphenolic peracetates (PA) to functional proteins, which was termed acetoxy drug: protein transacetylase (TAase) because it acted upon several classes of PA. Here, we report the purification of TAase from human placental microsomes to homogeneity with molecular mass of 60 kDa, exhibiting varying degrees of specificity to several classes of PA confirming the structure-activity relationship for the microsome-bound TAase. The TAase catalyzed protein acetylation by a model acetoxy drug, 7,8-diacetoxy-4-methyl coumarin (DAMC) was established by the demonstration of immunoreactivity of the acetylated target protein with anti-acetyl lysine antibody. TAase activity was severely inhibited in calcium-aggregated microsomes as well as when Ca2+ was added to purified TAase, suggesting that TAase could be a calcium binding protein. Furthermore, the N-terminal sequence analysis of purified TAase (EPAVYFKEQFLD) using Swiss Prot Database perfectly matched with calreticulin (CRT), a major microsomal calcium binding protein of the endoplasmic reticulum (ER). The identity of TAase with CRT was substantiated by the observation that the purified TAase avidly reacted with commercially available antibody raised against the C-terminus of human CRT (13 residues peptide, DEEDATGQAKDEL). Purified TAase also showed Ca2+ binding and acted as a substrate for phosphorylation catalyzed by protein kinase C (PKC), which are hallmark characteristics of CRT. Further, purified placental CRT as well as the commercially procured pure CRT yielded significant TAase catalytic activity and were also found effective in mediating the acetylation of the target protein NADPH cytochrome P-450 reductase by DAMC as detected by Western blot using anti-acetyl lysine antibody. These observations for the first time convincingly attribute the transacetylase function to CRT. Hence, this transacetylase function of CRT is designated calreticulin transacetylase (CRTAase). We envisage that CRTAase plays an important role in protein modification by way of acetylation independent of Acetyl CoA. 相似文献
992.
Johnson SR Padmanabha R Vaccaro W Hermsmeier M Cacace A Lawrence M Dickey J Esposito K Pike K Wong V Poss M Loughney D Tebben A 《Journal of biomolecular screening》2007,12(2):276-284
Among the several goals of a high-throughput screening campaign is the identification of as many active chemotypes as possible for further evaluation. Often, however, the number of concentration response curves (e.g., IC(50)s or K(i)s) that can be collected following a primary screen is limited by practical constraints such as protein supply, screening workload, and so forth. One possible approach to this dilemma is to cluster the hits from the primary screen and sample only a few compounds from each cluster. This introduces the question as to how many compounds must be selected from a cluster to ensure that an active compound is identified, if it exists at all. This article seeks to address this question using a Monte Carlo simulation in which the dependence of the success of sampling is directly linked to screening data variability. Furthermore, the authors demonstrate that the use of replicated compounds in the screening collection can easily assess this variability and provide a priori guidance to the screener and chemist as to the extent of sampling required to maximize chemotype identification during the triage process. The individual steps of the Monte Carlo simulation provide insight into the correspondence between the percentage inhibition and eventual IC(50) curves. 相似文献
993.
994.
Srivastava Arpna Banerjee Jyotirmoy Dubey Vivek Tripathi Manjari Chandra P. Sarat Sharma M. C. Lalwani Sanjeev Siraj Fouzia Doddamani Ramesh Dixit Aparna Banerjee 《Cellular and molecular neurobiology》2022,42(4):1049-1064
Cellular and Molecular Neurobiology - Histone deacetylases (HDACs) have been described to have both neurotoxic and neuroprotective roles, and partly, depend on its sub-cellular distribution. HDAC... 相似文献
995.
Sahu Santoshi Patil C. R. Kumar Sachin Apparsundaram Subbu Goyal Ramesh K. 《Molecular and cellular biochemistry》2022,477(1):225-240
Molecular and Cellular Biochemistry - Severe acute respiratory syndrome-coronavirus-2 (COVID-19) virus uses Angiotensin-Converting Enzyme 2 (ACE2) as a gateway for their entry into the human body.... 相似文献
996.
Sharma Neelam Malhotra Era Vaidya Chandra Ramesh Gowthami Ravi Sultan Sheikh Mohammad Bansal Sangita Shankar Muthusamy Agrawal Anuradha 《In vitro cellular & developmental biology. Plant》2022,58(4):521-529
In Vitro Cellular & Developmental Biology - Plant - Dioscorea deltoidea Wall. ex Griseb. is a critically endangered, commercially important crop of high medicinal value. Several accessions of... 相似文献
997.
Govinda Rao Velamala Muddula Krishna Naranji Ramesh Babu Kondamudi 《Zeitschrift fur angewandte Ichthyologie》2019,35(3):815-817
Length‐weight relationships (LWRs) were determined for 4 deep water fish species from Visakhapatnam coast, India. Specimens were collected fortnightly between December 2013 and November 2015 from commercial trawls at Visakhapatnam fish landing centre (16.98°N–20.2°N, Long.82.19°–86.53°E). Individuals were captured between 100 and 300 m depth with shrimp trawl net (head rope length: 37–46 m and cod end mesh size: 30–40 mm). Total length (TL) (nearest to 0.1 cm) and body weights (nearest to 0.1 g) were taken each individual. All LWRs were significant with r2 values ranged from 0.958 for Uranoscopus bicinctus Temminkc & Schlegel, 1843 to 0.983 for Uranoscopus chinensis Guichenot, 1882 and “b” values ranged from 2.832 for U. bicinctus to 3. 402 Synodus indicus (Day, 1873).This study provides a new maximum length data for three species (Uranoscopus bicinctus Temminkc & Schlegel, 1843; Uranoscopus chinensis Guichenot, 1882 and Uranoscopus marmoratus Cuvier, 1829). 相似文献
998.
Showket Hussain Ankita Singh Sheeraz Un Nazir Sonam Tulsyan Asiya Khan Ramesh Kumar Nasreena Bashir Pranay Tanwar Ravi Mehrotra 《Journal of cellular biochemistry》2019,120(9):14213-14225
Cancer is a disease that claims millions of lives each year across the world. Despite advancement in technologies and therapeutics for treating the disease, these modes are often found to turn ineffective during the course of treatment. The resistance against drugs in cancer patients stems from multiple factors, which constitute genetic heterogeneity like gene mutations, tumor microenvironment, exosomes, miRNAs, high rate of drug efflux from cells, and so on. This review attempts to collate all such known and reported factors that influence cancer drug resistance and may help researchers with information that might be useful in developing better therapeutics in near future to enable better management of several cancers across the world. 相似文献
999.
1000.
Elham Amini Jens V. Andersen Barnali Chakraborti Artem V. Diuba Tatsiana G. Dubouskaya Eric Ehrke Andiara Espindola de Freitas Guilherme Braga de Freitas Rafaella A. Gonçalves Deepali Gupta Richa Gupta Sharon R. Ha Isabel A. Hemming Minal Jaggar Emil Jakobsen Punita Kumari Navya Lakkappa Ashley P. L. Marsh Jessica Mitlöhner Yuki Ogawa Ramesh Kumar Paidi Felipe C. Ribeiro Ahmad Salamian Suraiya Saleem Sorabh Sharma Joana M. Silva Shripriya Singh Kunjbihari Sulakhiya Tesfaye Wolde Tefera Behnam Vafadari Anuradha Yadav Reiji Yamazaki Constanze I. Seidenbecher 《Journal of neurochemistry》2019,151(2):139-165