Search results for: AARSD1
#31170354 2019/06/06 To Up
Myoglobin maturation is driven by the hsp90 chaperone machinery and by soluble guanylyl cyclase.Myoglobin (Mb) maturation involves heme incorporation as a final step. We investigated a role for heat shock protein (hsp) 90 in Mb maturation in C2C12 skeletal muscle myoblasts and cell lines. We found the following: ) Hsp90 directly interacts preferentially with heme-free Mb both in purified form and in cells. ) Hsp90 drives heme insertion into apoprotein-Mb in an ATP-dependent process. ) During differentiation of C2C12 myoblasts into myotubes, the apo-Mb-hsp90 complex associates with 5 cell cochaperons, Hsp70, activator of hsp90 ATPase protein 1 (Aha1), alanyl-tRNA synthetase domain containing 1 (Aarsd1), cell division cycle 37 (Cdc37), and stress induced phosphoprotein 1 (STIP1) in a pattern that is consistent with their enabling Mb maturation. ) Mb heme insertion was significantly increased in cells that had a functional soluble guanylyl cyclase (sGC)-cGMP signaling pathway and was diminished upon small interfering RNA knockdown of sGCβ1 or upon overexpression of a phosphodiesterase to prevent cGMP buildup. Together, our findings suggest that hsp90 works in concert with cochaperons (Hsp70, Aha1, Aarsd1, STIP1, and Cdc37) and an active sGC-cGMP signaling pathway to promote heme insertion into immature apo-Mb, and thus generate functional Mb during muscle myotube formation. This fills gaps in our understanding and suggests new ways to potentially control these processes.-Ghosh, A., Dai, Y., Biswas, P., Stuehr, D. J. Myoglobin maturation is driven by the hsp90 chaperone machinery and by soluble guanylyl cyclase.
Arnab Ghosh, Yue Dai, Pranjal Biswas, Dennis J Stuehr
2953 related Products with: Myoglobin maturation is driven by the hsp90 chaperone machinery and by soluble guanylyl cyclase.0.2 mg1 mg200ul200 0.2 mg0.1ml (1mg/ml)100ug Lyophilized100ug Lyophilized100ug Lyophilized100ug Lyophilized100ug Lyophilized100ug Lyophilized
#29749055 2018/05/10 To Up
AARS2-related ovarioleukodystrophy: Clinical and neuroimaging features of three new cases.Adult-onset leukoencephalopathy with axonal spheroids and pigmented glia (ALSP), previously known as hereditary diffuse leukoencephalopathy with axonal spheroids (HDLS) or pigmentary orthochromatic leukodystrophy (POLD), is the most frequent non-vascular adult-onset leukoencephalopathy. It is caused by autosomal dominant mutations in CSF1R gene. Recently, also autosomal recessive mutations in AARS2 gene were found to be the cause of an adult-onset leukodystrophy with axonal spheroids. Our aim was to achieve a genetic diagnosis in a cohort of CSF1R-negative patients, performing a sequence analysis of AARS2 gene.
I Taglia, I Di Donato, S Bianchi, A Cerase, L Monti, R Marconi, A Orrico, A Rufa, A Federico, M T Dotti
2692 related Products with: AARS2-related ovarioleukodystrophy: Clinical and neuroimaging features of three new cases.
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#29666464 2018/04/17 To Up
An adolescence-onset male leukoencephalopathy with remarkable cerebellar atrophy and novel compound heterozygous AARS2 gene mutations: a case report.Mutations in the mitochondrial alanyl-transfer (t)RNA synthetase 2 (AARS2; OMIM 612035) have been linked to leukoencephalopathy recently. Until now, there have been only 13 cases reported in the literature. Hence, the clinical and genetic characteristics of this disease are not fully understood. Here, we reported an adolescence-onset male leukoencephalopathy patient characterized by progressive limb tremor at the age of 17 years. He had no signs of a cardiomyopathy. Magnetic resonance imaging scanning demonstrated severe cerebellar atrophy and white matter abnormalities involving descending tracts. Focused exome sequencing revealed he had novel compound heterozygous mutations in AARS2 gene (c.2265dupA; p.Arg756fs and c.650C>T; p.Pro217Leu). The patient was diagnosed with AARS2 mutation-related leukodystrophy (AARS2-L). We report a case with novel AARS2 gene mutations with developed striking cerebellar atrophy and leukoencephalopathy, which helps to further understand the clinical and genetic heterogeneity of AARS2-L.
Qing Dong, Ling Long, Yan-Yu Chang, Yan-Jun Lin, Mei Liu, Zheng-Qi Lu
1522 related Products with: An adolescence-onset male leukoencephalopathy with remarkable cerebellar atrophy and novel compound heterozygous AARS2 gene mutations: a case report.100 μg1 g100ul100ug Lyophilized96 wells (1 kit) 25UG
#27734837 2016/10/13 To Up
Novel AARS2 gene mutation producing leukodystrophy: a case report.AARS2 gene (NM_020745.3) mutations result in two different phenotypic diseases: infantile mitochondrial cardiomyopathy and late-onset leukoencephalopathy. The patient's first symptoms appeared at the age of 18 years with behavioral changes and psychiatric problems. Some years later, extrapyramidal symptoms, cognitive impairment, nystagmus, dysarthria and pyramidal symptoms also developed. The brain magnetic resonance imaging (MRI) indicated extensive white matter abnormalities. The diagnosis of AARS2 gene mutations causing leukodystrophy was confirmed by genetic testing. Segregation analysis confirmed the compound heterozygous state of the patient. Histological examination of the biopsy did not prove specific pathological alterations. The clinical phenotype of our patient was compared with seven previously described patients suffering from leukoencephalopathy caused by AARS2 mutations. We have documented a new, nonsense AARS2 gene mutation (c.578T>G, p.Leu193*) and a known missense mutation (c.595C>T, p.Arg199Cys) associated with leukoencephalopathy in a male patient. Clinical features, imaging characteristics and genetic testing are presented, and histological data from an AARS2-related leukodystrophy patient are described for the first time.
Laszlo Szpisjak, Nora Zsindely, Jozsef I Engelhardt, Laszlo Vecsei, Gabor G Kovacs, Peter Klivenyi50 ug100ug Lyophilized
#26884463 2016/03/31 To Up
A Remodeled Hsp90 Molecular Chaperone Ensemble with the Novel Cochaperone Aarsd1 Is Required for Muscle Differentiation.Hsp90 is the ATP-consuming core component of a very abundant molecular chaperone machine that handles a substantial portion of the cytosolic proteome. Rather than one machine, it is in fact an ensemble of molecular machines, since most mammalian cells express two cytosolic isoforms of Hsp90 and a subset of up to 40 to 50 cochaperones and regulate their interactions and functions by a variety of posttranslational modifications. We demonstrate that the Hsp90 ensemble is fundamentally remodeled during muscle differentiation and that this remodeling is not just a consequence of muscle differentiation but possibly one of the drivers to accompany and to match the vast proteomic changes associated with this process. As myoblasts differentiate into myotubes, Hsp90α disappears and only Hsp90β remains, which is the only isoform capable of interacting with the novel muscle-specific Hsp90 cochaperone Aarsd1L. Artificially maintaining Hsp90α or knocking down Aarsd1L expression interferes with the differentiation of C2C12 myotubes. During muscle differentiation, Aarsd1L replaces the more ubiquitous cochaperone p23 and in doing so dampens the activity of the glucocorticoid receptor, one of the Hsp90 clients relevant to muscle functions. This cochaperone switch protects muscle cells against the inhibitory effects of glucocorticoids and may contribute to preventing muscle wasting induced by excess glucocorticoids.
Pablo C Echeverría, Pierre-André Briand, Didier Picard
1070 related Products with: A Remodeled Hsp90 Molecular Chaperone Ensemble with the Novel Cochaperone Aarsd1 Is Required for Muscle Differentiation.20 ug100 TESTS100ug Lyophilized100ug Lyophilized0.1ml (1mg/ml)250 ml100ug Lyophilized0.2 mg0.1 mg100ug Lyophilized100ug Lyophilized1 LITRE
#25961023 2015/04/15 To Up
Transcriptomic Analysis of mRNAs in Human Monocytic Cells Expressing the HIV-1 Nef Protein and Their Exosomes.The Nef protein of human immunodeficiency virus (HIV) promotes viral replication and progression to AIDS. Besides its well-studied effects on intracellular signaling, Nef also functions through its secretion in exosomes, which are nanovesicles containing proteins, microRNAs, and mRNAs and are important for intercellular communication. Nef expression enhances exosome secretion and these exosomes can enter uninfected CD4 T cells leading to apoptotic death. We have recently reported the first miRNome analysis of exosomes secreted from Nef-expressing U937monocytic cells. Here we show genome-wide transcriptome analysis of Nef-expressing U937 cells and their exosomes. We identified four key mRNAs preferentially retained in Nef-expressing cells; these code for MECP2, HMOX1, AARSD1, and ATF2 and are important for chromatin modification and gene expression. Interestingly, their target miRNAs are exported out in exosomes. We also identified three key mRNAs selectively secreted in exosomes from Nef-expressing U937 cells and their corresponding miRNAs being preferentially retained in cells. These are AATK, SLC27A1, and CDKAL and are important in apoptosis and fatty acid transport. Thus, our study identifies selectively expressed mRNAs in Nef-expressing U937 cells and their exosomes and supports a new mode on intercellular regulation by the HIV-1 Nef protein.
Madeeha Aqil, Saurav Mallik, Sanghamitra Bandyopadhyay, Ujjwal Maulik, Shahid Jameel
1092 related Products with: Transcriptomic Analysis of mRNAs in Human Monocytic Cells Expressing the HIV-1 Nef Protein and Their Exosomes.100ug Lyophilized100ug Lyophilized100ul100ug Lyophilized1.00 flask100ug Lyophilized100ug Lyophilized100ug Lyophilized 100ul 100ul100ug Lyophilized1.00 flask
#23185754 // To Up
[Study on gene differential expressions of substance and energy metabolism in chronic superficial gastritis patients of Pi deficiency syndrome and of pi-wei hygropyrexia syndrome].To analyze the metabolic levels of energy and substance in chronic superficial gastritis (CSG) patients of Pi deficiency syndrome (PDS) and of Pi-Wei hygropyrexia syndrome (PWHS), including lipid, protein, nucleic acid, carbohydrate, trace element, and energy metabolism, and to study the pathogenesis mechanism of PDS from substance and energy metabolisms.
Ze-Min Yang, Wei-Wen Chen, Ying-Fang Wang
2169 related Products with: [Study on gene differential expressions of substance and energy metabolism in chronic superficial gastritis patients of Pi deficiency syndrome and of pi-wei hygropyrexia syndrome].100 μg96 tests 5 G1 Set50 ug 2 Pieces/Box10mg200ug2 Pieces/Box100ul100.00 ug1 Set
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