keyword
MENU ▼
Read by QxMD icon Read
search

Aminoacyl

keyword
https://www.readbyqxmd.com/read/29352840/serum-aminoacyl-trna-synthetase-interacting-multifunctional-protein-1-aimp1-a-novel-disease-activity-predictive-biomarker-of-systemic-lupus-erythematosus
#1
Sung Soo Ahn, Shin Hee Hong, Younhee Park, Seung Min Jung, Jason Jungsik Song, Yong-Beom Park, Sang-Won Lee, Sang Gyu Park
OBJECTIVES: Secreted aminoacyl-tRNA synthetase-interacting multifunctional protein-1 (AIMP1) has been reported to have pro-inflammatory properties. The aim of this study was to evaluate the clinical significance of serum AIMP1 in patients with systemic lupus erythematosus (SLE). METHODS: Serum levels of AIMP1 were measured in 160 patients with SLE using a human AIMP1 ELISA kit. Eighty patients were classified as active SLE (SLEDAI-2K ≥ 5), and 80 patients were classified as stable SLE...
January 15, 2018: Clinical and Experimental Rheumatology
https://www.readbyqxmd.com/read/29352613/mrna-translation-gone-awry-translation-fidelity-and-neurological-disease
#2
REVIEW
Mridu Kapur, Susan L Ackerman
Errors during mRNA translation can lead to a reduction in the levels of functional proteins and an increase in deleterious molecules. Advances in next-generation sequencing have led to the discovery of rare genetic disorders, many caused by mutations in genes encoding the mRNA translation machinery, as well as to a better understanding of translational dynamics through ribosome profiling. We discuss here multiple neurological disorders that are linked to errors in tRNA aminoacylation and ribosome decoding. We draw on studies from genetic models, including yeast and mice, to enhance our understanding of the translational defects observed in these diseases...
January 15, 2018: Trends in Genetics: TIG
https://www.readbyqxmd.com/read/29348176/contribution-of-the-trnaile-4317a-g-mutation-to-the-phenotypic-manifestation-of-the-deafness-associated-mitochondrial-12s-rrna-1555a-g-mutation
#3
Feilong Meng, Zheyun He, Xiaowen Tang, Jing Zheng, Xiaofen Jin, Yi Zhu, Xiaoyan Ren, Mi Zhou, Meng Wang, Shasha Gong, Jun Qin Mo, Qiang Shu, Min-Xin Guan
The 1555A>G mutation in mitochondrial 12S rRNA has been associated with aminoglycoside-induced and nonsyndromic deafness in many individuals worldwide. Mitochondrial genetic modifiers are proposed to influence the phenotypic expression of m.1555A>G mutation. Here, we report that a deafness-susceptibility allele (m.4317A>G) in the tRNAIle gene modulates the phenotype expression of m.1555A>G mutation. Strikingly, a large Han Chinese pedigree carrying both m.4317A>G and m.1555A>G mutations exhibited much higher penetrance of deafness than those carrying only m...
January 18, 2018: Journal of Biological Chemistry
https://www.readbyqxmd.com/read/29346626/anti-aminoacyl-trna-synthetase-antibody-positive-clinically-amyopathic-dermatomyositis
#4
Toshiki Ebisudani, Takanori Asakura, Soichiro Ueda, Makoto Ishii, Tomoko Betsuyaku
No abstract text is available yet for this article.
January 15, 2018: QJM: Monthly Journal of the Association of Physicians
https://www.readbyqxmd.com/read/29345185/drugging-trna-aminoacylation
#5
Joanne M Ho, Erol Bakkalbasi, Dieter Söll, Corwin A Miller
Inhibition of tRNA aminoacylation has proven to be an effective antimicrobial strategy, impeding an essential step of protein synthesis. Mupirocin, the well-known selective inhibitor of bacterial isoleucyl-tRNA synthetase, is one of three aminoacylation inhibitors now approved for human or animal use. However, design of novel aminoacylation inhibitors is complicated by the steadfast requirement to avoid off-target inhibition of protein synthesis in human cells. Here we review available data regarding known aminoacylation inhibitors as well as key amino-acid residues in aminoacyl-tRNA synthetases (aaRSs) and nucleotides in tRNA that determine the specificity and strength of the aaRS-tRNA interaction...
January 18, 2018: RNA Biology
https://www.readbyqxmd.com/read/29340996/recent-advances-in-the-development-of-polycyclic-skeletons-via-ugi-reaction-cascades
#6
REVIEW
Jie Lei, Jiang-Ping Meng, Dian-Yong Tang, Brendan Frett, Zhong-Zhu Chen, Zhi-Gang Xu
Isocyanide-based multicomponent reactions are among the most powerful synthetic tools available. Particularly, the isocyanide-based Ugi reaction can allow rapid preparation of [Formula: see text]-aminoacyl amide derivatives and polyazaheterocycles with extensive pharmaceutical applications. Moreover, bridged polyazaheterocycles, including one or more quaternary carbon centers, can be constructed via the Ugi cascade reaction in a few steps. This review will emphasize synthesis and bioactivities of bridged compounds with quaternary centers constructed through Ugi cascade reactions...
January 16, 2018: Molecular Diversity
https://www.readbyqxmd.com/read/29340059/microrna-95-promotes-myogenic-differentiation-by-down-regulation-of-aminoacyl-trna-synthase-complex-interacting-multifunctional-protein-2
#7
Biao Li, Shanshan Xie, Chunbo Cai, Lili Qian, Shengwang Jiang, Dezun Ma, Gaojun Xiao, Ting Gao, Jinzeng Yang, Wentao Cui
MicroRNA-95 (miR-95) is well known for its ability to promote the proliferation of a variety of cancer cells, but its function in skeletal muscle development has not been reported so far. Our laboratory has recently generated genetically engineered Meishan pigs containing a loss-of-function myostatin (MSTN) mutant (MSTN-/-). These MSTN-/- pigs grow and develop normally but show clear double muscle phenotype as observed in Belgian cattle. We observed that the expression of miR-95 was up-regulated in the longissimus dorsi from MSTN-/- Meishan pigs at day 65 during embryo development...
December 19, 2017: Oncotarget
https://www.readbyqxmd.com/read/29339430/simultaneous-binding-of-multiple-ef-tu-copies-to-translating-ribosomes-in-live-escherichia-coli
#8
Mainak Mustafi, James C Weisshaar
In bacteria, elongation factor Tu is a translational cofactor that forms ternary complexes with aminoacyl-tRNA (aa-tRNA) and GTP. Binding of a ternary complex to one of four flexible L7/L12 units on the ribosome tethers a charged tRNA in close proximity to the ribosomal A site. Two sequential tests for a match between the aa-tRNA anticodon and the current mRNA codon then follow. Because one elongation cycle can occur in as little as 50 ms and the vast majority of aa-tRNA copies are not cognate with the current mRNA codon, this testing must occur rapidly...
January 16, 2018: MBio
https://www.readbyqxmd.com/read/29337967/errata-continuous-directed-evolution-of-aminoacyl-trna-synthetases
#9
David I Bryson, Chenguang Fan, Li-Tao Guo, Corwin Miller, Dieter Söll, David R Liu
This corrects the article DOI: 10.1038/nchembio.2474.
January 16, 2018: Nature Chemical Biology
https://www.readbyqxmd.com/read/29334896/global-analysis-of-prokaryotic-trna-derived-cyclodipeptide-biosynthesis
#10
Michael A Skinnider, Chad W Johnston, Nishanth J Merwin, Chris A Dejong, Nathan A Magarvey
BACKGROUND: Among naturally occurring small molecules, tRNA-derived cyclodipeptides are a class that have attracted attention for their diverse and desirable biological activities. However, no tools are available to link cyclodipeptide synthases identified within prokaryotic genome sequences to their chemical products. Consequently, it is unclear how many genetically encoded cyclodipeptides represent novel products, and which producing organisms should be targeted for discovery. RESULTS: We developed a pipeline for identification and classification of cyclodipeptide biosynthetic gene clusters and prediction of aminoacyl-tRNA substrates and complete chemical structures...
January 15, 2018: BMC Genomics
https://www.readbyqxmd.com/read/29332387/proteome-wide-characterization-of-phosphorylation-induced-conformational-changes-in-breast-cancer
#11
He Meng, Michael C Fitzgerald
Because of the close link between protein function and protein folding stability, knowledge about phosphorylation-induced protein folding stability changes can lead to a better understanding of the functional effects of protein phosphorylation. Here, the Stability of Proteins from Rates of OXidation (SPROX) and Limited Proteolysis (LiP) techniques are used to compare the conformational properties of proteins in two MCF-7 cell lysates, including one that was and one that was not dephosphorylated with alkaline phosphatase...
January 15, 2018: Journal of Proteome Research
https://www.readbyqxmd.com/read/29330550/a-metabolomics-pilot-study-on-desmoid-tumors-and-novel-drug-candidates
#12
Kelly A Mercier, Mushriq Al-Jazrawe, Raymond Poon, Zachery Acuff, Benjamin Alman
Desmoid tumors (aggressive fibromatosis) are locally invasive soft tissue tumors that lack the ability to metastasize. There are no directed therapies or standard treatment plan, and chemotherapeutics, radiation, and surgery often have temporary effects. The majority of desmoid tumors are related to T41A and S45F mutations of the beta-catenin encoding gene (CTNNB1). Using broad spectrum metabolomics, differences were investigated between paired normal fibroblast and desmoid tumor cells from affected patients...
January 12, 2018: Scientific Reports
https://www.readbyqxmd.com/read/29320932/classical-molecular-dynamics-simulation-of-seryl-trna-synthetase-and-threonyl-trna-synthetase-bound-with-trna-and-aminoacyl-adenylate
#13
Saheb Dutta, Nilashis Nandi
Lacunae of understanding exist concerning the active site organization during the charging step of the aminoacylation reaction. We present here a molecular dynamics simulation study of the dynamics of the active site organization during charging step of subclass IIa dimeric SerRS from Thermus thermophilus (ttSerRS) bound with tttRNASer and dimeric ThrRS from Escherichia coli (ecThrRS) bound with ectRNAThr. The interactions between the catalytically important loops and tRNA contribute to the change in dynamics of tRNA in free and bound states, respectively...
January 10, 2018: Journal of Biomolecular Structure & Dynamics
https://www.readbyqxmd.com/read/29320701/aminoacylation-of-proteins-new-targets-for-the-old-arsenal
#14
Seyed Mehdi Jafarnejad, Sung-Hoon Kim, Nahum Sonenberg
Besides charging tRNAs with their cognate amino acids, aminoacyl-tRNA synthetases (ARSs) are involved in a plethora of non-canonical functions, including development, immune response, and angiogenesis. In this issue of Cell Metabolism, He et al. (2018) report a novel biochemical function of ARSs: posttranslational addition of amino acids to lysine residues in proteins.
January 9, 2018: Cell Metabolism
https://www.readbyqxmd.com/read/29316044/global-transcriptome-profiling-of-mild-relapsing-remitting-versus-primary-progressive-multiple-sclerosis
#15
Marcus W Koch, Yaroslav Ilnytskyy, Andrey Golubov, Luanne M Metz, V Wee Yong, Olga Kovalchuk
BACKGROUND: Genetic research in MS mostly compares MS patients with healthy controls, but does not differentiate between MS disease courses. We compared peripheral blood gene expression patterns between extremes of MS phenotypes: patients with mild relapsing-remitting MS (mRRMS) and primary progressive MS (PPMS). METHODS: We analyzed global gene expression profiles of peripheral blood samples of age and gender matched patients with mRRMS and PPMS. Detailed bioinformatic and gene set enrichment analysis, pathway and principle component analyses were used to identify differentially expressed genes and pathways...
January 8, 2018: European Journal of Neurology: the Official Journal of the European Federation of Neurological Societies
https://www.readbyqxmd.com/read/29314548/clinical-biochemical-and-genetic-features-associated-with-vars2-related-mitochondrial-disease
#16
Francesco Bruni, Ivano Di Meo, Emanuele Bellacchio, Bryn D Webb, Robert McFarland, Zofia M A Chrzanowska-Lightowlers, Langping He, Ewa Skorupa, Isabella Moroni, Anna Ardissone, Anna Walczak, Henna Tyynismaa, Pirjo Isohanni, Hanna Mandel, Holger Prokisch, Tobias Haack, Penelope E Bonnen, Bertini Enrico, Ewa Pronicka, Daniele Ghezzi, Robert W Taylor, Daria Diodato
In recent years, an increasing number of mitochondrial disorders have been associated with mutations in mitochondrial aminoacyl-tRNA synthetases (mt-aaRSs), which are key enzymes of mitochondrial protein synthesis. Bi-allelic functional variants in VARS2, encoding the mitochondrial valyl tRNA-synthetase, were first reported in a patient with psychomotor delay and epilepsia partialis continua associated with an oxidative phosphorylation (OXPHOS) complex I defect, before being described in a patient with a neonatal form of encephalocardiomyopathy...
January 3, 2018: Human Mutation
https://www.readbyqxmd.com/read/29305884/aminoacyl-trna-synthetases-structure-function-and-drug-discovery
#17
REVIEW
Vijayakumar Rajendran, Parismita Kalita, Harish Shukla, Awanish Kumar, Timir Tripathi
Aminoacyl-tRNA synthetases (AARSs) are the enzymes that catalyze the aminoacylation reaction by covalently linking an amino acid to its cognate tRNA in the first step of protein translation. Beyond this classical function, these enzymes are also known to have a role in several metabolic and signaling pathways that are important for cell viability. Study of these enzymes is of great interest to the researchers due to its pivotal role in the growth and survival of an organism. Further, unfolding the interesting structural and functional aspects of these enzymes in the last few years has qualified them as a potential drug target against various diseases...
January 3, 2018: International Journal of Biological Macromolecules
https://www.readbyqxmd.com/read/29303545/investigation-of-amide-bond-formation-during-dehydrophos-biosynthesis
#18
Emily C Ulrich, Despina J Bougioukou, Wilfred A van der Donk
Dehydrophos is a tripeptide phosphonate antibiotic produced by Streptomyces luridus. Its biosynthetic pathway involves the use of aminoacyl-tRNA (aa-tRNA) for amide bond formation. The first amide bond during biosynthesis is formed by DhpH-C, a peptidyltransferase that utilizes Leu-tRNALeu. DhpH-C is a member of a burgeoning family of natural product biosynthetic enzymes that make use of aa-tRNA outside of canonical translation activities in the cell. Here we used site-directed mutagenesis of both DhpH-C and tRNALeu to investigate the enzyme mechanism and substrate specificity, respectively, and analyzed the substrate scope for the production of a series of dipeptides...
January 5, 2018: ACS Chemical Biology
https://www.readbyqxmd.com/read/29301968/engineering-posttranslational-proofreading-to-discriminate-nonstandard-amino-acids
#19
Aditya M Kunjapur, Devon A Stork, Erkin Kuru, Oscar Vargas-Rodriguez, Matthieu Landon, Dieter Söll, George M Church
Incorporation of nonstandard amino acids (nsAAs) leads to chemical diversification of proteins, which is an important tool for the investigation and engineering of biological processes. However, the aminoacyl-tRNA synthetases crucial for this process are polyspecific in regard to nsAAs and standard amino acids. Here, we develop a quality control system called "posttranslational proofreading" to more accurately and rapidly evaluate nsAA incorporation. We achieve this proofreading by hijacking a natural pathway of protein degradation known as the N-end rule, which regulates the lifespan of a protein based on its amino-terminal residue...
January 4, 2018: Proceedings of the National Academy of Sciences of the United States of America
https://www.readbyqxmd.com/read/29288497/the-role-of-trna-synthetases-in-neurological-and-neuromuscular-disorders
#20
REVIEW
Veronika Boczonadi, Matthew J Jennings, Rita Horvath
Aminoacyl-tRNA synthetases (ARSs) are ubiquitously expressed enzymes responsible for charging tRNAs with their cognate amino acids, therefore essential for the first step in protein synthesis. Although the majority of protein synthesis happens in the cytosol, an additional translation apparatus is required to translate the 13 mitochondrial DNA-encoded proteins important in oxidative phosphorylation. Most ARS genes in these cellular compartments are distinct, but two genes are common, encoding aminoacyl-tRNA synthetases of glycine (GARS) and lysine (KARS) in both mitochondria and the cytosol...
December 30, 2017: FEBS Letters
keyword
keyword
9526
1
2
Fetch more papers »
Fetching more papers... Fetching...
Read by QxMD. Sign in or create an account to discover new knowledge that matter to you.
Remove bar
Read by QxMD icon Read
×

Search Tips

Use Boolean operators: AND/OR

diabetic AND foot
diabetes OR diabetic

Exclude a word using the 'minus' sign

Virchow -triad

Use Parentheses

water AND (cup OR glass)

Add an asterisk (*) at end of a word to include word stems

Neuro* will search for Neurology, Neuroscientist, Neurological, and so on

Use quotes to search for an exact phrase

"primary prevention of cancer"
(heart or cardiac or cardio*) AND arrest -"American Heart Association"