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Surya A, Bolton BM, Rothe R, Mejia-Trujillo R, Zhao Q, Leonita A, Liu Y, Rangan R, Gorusu Y, Nguyen P, Cenik C, Sarinay Cenik E. Cytosolic Ribosomal Protein Haploinsufficiency affects Mitochondrial Morphology and Respiration. bioRxiv 2024:2024.04.16.589775. [PMID: 38659761 PMCID: PMC11042305 DOI: 10.1101/2024.04.16.589775] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 04/26/2024]
Abstract
The interplay between ribosomal protein composition and mitochondrial function is essential for sustaining energy homeostasis. Precise stoichiometric production of ribosomal proteins is crucial to maximize protein synthesis efficiency while reducing the energy costs to the cell. However, the impact of this balance on mitochondrial ATP generation, morphology and function remains unclear. Particularly, the loss of a single copy ribosomal protein gene is observed in Mendelian disorders like Diamond Blackfan Anemia and is common in somatic tumors, yet the implications of this imbalance on mitochondrial function and energy dynamics are still unclear. In this study, we investigated the impact of haploinsufficiency for four ribosomal protein genes implicated in ribosomopathy disorders (rps-10, rpl-5, rpl-33, rps-23) in Caenorhabditis elegans and corresponding reductions in human lymphoblast cells. Our findings uncover significant, albeit variably penetrant, mitochondrial morphological differences across these mutants, alongside an upregulation of glutathione transferases, and SKN-1 dependent increase in oxidative stress resistance, indicative of increased ROS production. Specifically, loss of a single copy of rps-10 in C. elegans led to decreased mitochondrial activity, characterized by lower energy levels and reduced oxygen consumption. A similar reduction in mitochondrial activity and energy levels was observed in human leukemia cells with a 50% reduction in RPS10 transcript levels. Importantly, we also observed alterations in the translation efficiency of nuclear and mitochondrial electron transport chain components in response to reductions in ribosomal protein gene expression in both C. elegans and human cells. This suggests a conserved mechanism whereby the synthesis of components vital for mitochondrial function are adjusted in the face of compromised ribosomal machinery. Finally, mitochondrial membrane and cytosolic ribosomal components exhibited significant covariation at the RNA and translation efficiency level in lymphoblastoid cells across a diverse group of individuals, emphasizing the interplay between the protein synthesis machinery and mitochondrial energy production. By uncovering the impact of ribosomal protein haploinsufficiency on the translation efficiency of electron transport chain components, mitochondrial physiology, and the adaptive stress responses, we provide evidence for an evolutionarily conserved strategy to safeguard cellular functionality under genetic stress.
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Freeman TF, Zhao Q, Surya A, Rothe R, Cenik ES. Ribosome biogenesis disruption mediated chromatin structure changes revealed by SRAtac, a customizable end to end analysis pipeline for ATAC-seq. BMC Genomics 2023; 24:512. [PMID: 37658321 PMCID: PMC10472662 DOI: 10.1186/s12864-023-09576-y] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/10/2022] [Accepted: 08/11/2023] [Indexed: 09/03/2023] Open
Abstract
The nucleolus is a large nuclear body that serves as the primary site for ribosome biogenesis. Recent studies have suggested that it also plays an important role in organizing chromatin architecture. However, to establish a causal relationship between nucleolar ribosome assembly and chromatin architecture, genetic tools are required to disrupt nucleolar ribosome biogenesis. In this study, we used ATAC-seq to investigate changes in chromatin accessibility upon specific depletion of two ribosome biogenesis components, RPOA-2 and GRWD-1, in the model organism Caenorhabditis elegans. To facilitate the analysis of ATAC-seq data, we introduced two tools: SRAlign, an extensible NGS data processing workflow, and SRAtac, a customizable end-to-end ATAC-seq analysis pipeline. Our results revealed highly comparable changes in chromatin accessibility following both RPOA-2 and GRWD-1 perturbations. However, we observed a weak correlation between changes in chromatin accessibility and gene expression. While our findings corroborate the idea of a feedback mechanism between ribosomal RNA synthesis, nucleolar ribosome large subunit biogenesis, and chromatin structure during the L1 stage of C. elegans development, they also prompt questions regarding the functional impact of these alterations on gene expression.
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Affiliation(s)
- Trevor F Freeman
- Department of Molecular Biosciences, University of Texas, Austin, TX, 78712, USA
| | - Qiuxia Zhao
- Department of Molecular Biosciences, University of Texas, Austin, TX, 78712, USA
| | - Agustian Surya
- Department of Molecular Biosciences, University of Texas, Austin, TX, 78712, USA
| | - Reed Rothe
- Department of Molecular Biosciences, University of Texas, Austin, TX, 78712, USA
| | - Elif Sarinay Cenik
- Department of Molecular Biosciences, University of Texas, Austin, TX, 78712, USA.
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Bharath Balji G, Surya A, Govindaraj P, Monisha Ponsakthi G. Utilization of fly ash for the effective removal of hazardous dyes from textile effluent. INORG CHEM COMMUN 2022. [DOI: 10.1016/j.inoche.2022.109708] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/05/2022]
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Surya A, Sarinay-Cenik E. Cell autonomous and non-autonomous consequences of deviations in translation machinery on organism growth and the connecting signalling pathways. Open Biol 2022; 12:210308. [PMID: 35472285 PMCID: PMC9042575 DOI: 10.1098/rsob.210308] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/13/2021] [Accepted: 03/31/2022] [Indexed: 01/09/2023] Open
Abstract
Translation machinery is responsible for the production of cellular proteins; thus, cells devote the majority of their resources to ribosome biogenesis and protein synthesis. Single-copy loss of function in the translation machinery components results in rare ribosomopathy disorders, such as Diamond-Blackfan anaemia in humans and similar developmental defects in various model organisms. Somatic copy number alterations of translation machinery components are also observed in specific tumours. The organism-wide response to haploinsufficient loss-of-function mutations in ribosomal proteins or translation machinery components is complex: variations in translation machinery lead to reduced ribosome biogenesis, protein translation and altered protein homeostasis and cellular signalling pathways. Cells are affected both autonomously and non-autonomously by changes in translation machinery or ribosome biogenesis through cell-cell interactions and secreted hormones. We first briefly introduce the model organisms where mutants or knockdowns of protein synthesis and ribosome biogenesis are characterized. Next, we specifically describe observations in Caenorhabditis elegans and Drosophila melanogaster, where insufficient protein synthesis in a subset of cells triggers cell non-autonomous growth or apoptosis responses that affect nearby cells and tissues. We then cover the characterized signalling pathways that interact with ribosome biogenesis/protein synthesis machinery with an emphasis on their respective functions during organism development.
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Affiliation(s)
- Agustian Surya
- Department of Molecular Biosciences, University of Texas at Austin, Austin, TX, USA
| | - Elif Sarinay-Cenik
- Department of Molecular Biosciences, University of Texas at Austin, Austin, TX, USA
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Parwati CG, Farid MN, Nasution HS, Sulistyo, Basri C, Lolong D, Gebhard A, Tiemersma EW, Pambudi I, Surya A, Houben RMGJ. Estimation of subnational tuberculosis burden: generation and application of a new tool in Indonesia. Int J Tuberc Lung Dis 2020; 24:250-257. [DOI: 10.5588/ijtld.19.0139] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022] Open
Abstract
SETTING: In many high tuberculosis (TB) burden countries, there is substantial geographical heterogeneity in TB burden. In addition, decisions on TB funding and policy are highly decentralised. Subnational estimates of burden, however, are usually unavailable for planning and
target setting.OBJECTIVE and DESIGN: We developed a statistical model termed SUBsET to estimate the distribution of the national TB incidence through a weighted score using selected variables, and applied the model to the 514 districts in Indonesia, which have substantial policy
and budgetary autonomy in TB. Estimated incidence was compared to reported facility and domicile-based notifications to estimate the case detection rate (CDR). Local stakeholders led model development and dissemination.RESULTS: The final SUBsET model included district population
size, level of urbanisation, socio-economic indicators (living floor space and high school completion), human immunodeficiency virus prevalence and air pollution. We estimated district-level TB incidence to be between 201 and 2,485/100 000/year. The facility-based CDR varied between
0 and 190%, with high variation between neighbouring districts, suggesting strong cross-district health utilisation, which was confirmed by domicile-based CDR estimation. SUBsET results informed district-level TB action plans across Indonesia.CONCLUSION: The SUBsET model could be
used to estimate the subnational burden in high-burden countries and inform TB policymaking at the relevant decentralised administrative level.
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Affiliation(s)
| | | | - H. S. Nasution
- National TB Control Program, Ministry of Health, Jakarta
| | - Sulistyo
- National TB Control Program, Ministry of Health, Jakarta
| | - C. Basri
- National TB Expert Committee, Jakarta
| | - D. Lolong
- National Institute of Health Research and Development, Jakarta, Indonesia
| | | | | | - I. Pambudi
- National TB Control Program, Ministry of Health, Jakarta
| | - A. Surya
- National TB Control Program, Ministry of Health, Jakarta
| | - R. M. G. J. Houben
- TB Modelling Group, TB Centre, Department of Infectious Disease Epidemiology, London School of Hygiene & Tropical Medicine, London, UK
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Abstract
Glutathione, a tripeptide antioxidant, has recently been shown to be either utilized or synthesized by Gram-positive bacteria, such as lactic acid bacteria. Glutathione plays an important role in countering environmental stress, such as oxidative stress. In this study, cellular activity regarding glutathione in Lactobacillus fermentum CECT 5716 is characterized. We demonstrate that L. fermentum CECT 5716 has a better survival rate in the presence of glutathione under both oxidative and metal stress. As L. fermentum CECT 5716 does not possess the ability to synthesize glutathione under the conditions tested, it shows the ability to uptake both reduced and oxidized glutathione from the environment, regenerate reduced glutathione from oxidized glutathione, and perform secretion of glutathione to the environment.
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Affiliation(s)
- Agustian Surya
- Department of Food Science and Human Nutrition , University of Illinois at Urbana-Champaign , 1302 West Pennsylvania Avenue , Urbana , Illinois 61801 , United States
| | - Xiaoji Liu
- Department of Food Science and Human Nutrition , University of Illinois at Urbana-Champaign , 1302 West Pennsylvania Avenue , Urbana , Illinois 61801 , United States
| | - Michael J Miller
- Department of Food Science and Human Nutrition , University of Illinois at Urbana-Champaign , 1302 West Pennsylvania Avenue , Urbana , Illinois 61801 , United States
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Teoh ZH, Surya A, Mathialahan T, Khan H. An insidious case of hepatic artery pseudoaneurysm secondary to acalculus cholecystitis. BMJ Case Rep 2015; 2015:bcr-2015-212424. [PMID: 26561228 DOI: 10.1136/bcr-2015-212424] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/03/2022] Open
Abstract
A 68-year-old man with expressive dysphasia presented with upper gastrointestinal haemorrhage, jaundice and abdominal pain. He was unable to tolerate ultrasound tranducer pressure. His oesophagogastroduodenoscopy (OGD) showed large blood clots in the stomach with blood trickling from the ampulla. An urgent CT angiogram demonstrated a 32 mm pseudoaneurysm within the gallbladder fossa. The patient subsequently underwent an endovascular embolisation of the pseudoaneurysm performed by the interventional radiology team.
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Affiliation(s)
- Z H Teoh
- Department of Gastroenterology, Wrexham Maelor Hospital, Wrexham, UK
| | - A Surya
- Department of Gastroenterology, Wrexham Maelor Hospital, Wrexham, UK
| | - T Mathialahan
- Department of Gastroenterology, Wrexham Maelor Hospital, Wrexham, UK
| | - H Khan
- Department of Gastroenterology, Wrexham Maelor Hospital, Wrexham, UK
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Abstract
The pineal gland expresses a unique member of the opsin family (P-opsin; Max, M., McKinnon, P. J., Seidenman, K. J., Barrett, R. K., Applebury, M. L., Takahashi, J. S., and Margolskee, R. F. (1995) Science 267, 1502-1506) that may play a role in circadian entrainment and photo-regulation of melatonin synthesis. To study the function of this protein, an epitope-tagged P-opsin was stably expressed in an embryonic chicken pineal cell line. When incubated with 11-cis-retinal, a light-sensitive pigment was formed with a lambdamax at 462 +/- 2 nm. P-opsin bleached slowly in the dark (t1/2 = 2 h) in the presence of 50 mM hydroxylamine. Purified P-opsin in dodecyl maltoside activated rod transducin in a light-dependent manner, catalyzing the exchange of more than 300 mol of GTPgammaS (guanosine 5'-O-(3-thiotriphosphate))/mol of P-opsin. The initial rate for activation (75 mol of GTPgammaS bound/mol of P-opsin/min at 7 microM) increased with increasing concentrations of transducin. The addition of egg phosphatidylcholine to P-opsin had little effect on the activation kinetics; however, the intrinsic rate of decay in the absence of transducin was accelerated. These results demonstrate that P-opsin is an efficient catalyst for activation of rod transducin and suggest that the pineal gland may contain a rodlike phototransduction cascade.
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Affiliation(s)
- M Max
- Department of Physiology and Biophysics, Mount Sinai School of Medicine, New York, New York 10029, USA.
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Affiliation(s)
- A Surya
- Department of Cardiovascular Pharmacology, SmithKline Beecham Pharmaceuticals Ltd, King of Prussia, PA 19406, USA
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Abstract
The rod cell photoreceptor apoprotein, opsin, activates the G-protein, transducin, although at a much reduced level than light-activated rhodopsin. The ability of all-trans-retinal to enhance opsin apoprotein activity was investigated using a guanyl nucleotide exchange assay on transducin. All-trans-retinal enhanced opsin activity in a concentration-dependent manner. At high concentrations of all-trans-retinal, the activity of the all-trans-retinal-opsin complex was comparable to that from an equimolar amount of metarhodopsin(II). However, in contrast to metarhodopsin(II), the active all-trans-retinalopsin complex did not require a stable Schiff base linkage between opsin and all-trans-retinal. The lack of a stable Schiff base and differences in activity at high pH imply that opsin and all-trans-retinal form a complex that is distinct from metarhodopsin(II). The ability of all-trans-retinal to stimulate the transduction cascade may be a source of post-bleach noise in photoreceptors.
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Affiliation(s)
- A Surya
- Department of Biochemistry and Molecular Biology, SUNY Health Science Center at Syracuse 13210, USA
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Abstract
The bovine opsin apoprotein activates transducin, although at a much reduced level than light-activated rhodopsin (Surya, A., Foster, K., and Knox, B. (1995) J. Biol. Chem. 270, 5024-5031). The ability of retinal to modulate opsin apoprotein activity was investigated using a guanyl nucleotide exchange assay on transducin. 11-cis-Retinal reacted with opsin at 22 degrees C to (a) reform pigment having maximal absorbance at 500 nm and (b) reduce opsin activity by >80%. Pigment formation also occurred at 0 degrees C with a t1/2 of 260 min. However, unlike rhodopsin formed at 22 degrees C (R22), the rhodopsin formed at 0 degrees C (R0) activated transducin with the same half-saturating concentration as opsin in an exhaustive binding assay. Thus, the formation of a protonated Schiff base associated with 500 nm absorbance does not by itself lead to the inactivation of opsin. The R0 conformation was partially inactivated by incubation at 22 degrees C (t1/2 = 61 +/- 9 min), suggesting that it may be an intermediate conformation in the regeneration of rhodopsin.
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Affiliation(s)
- A Surya
- Department of Biochemistry and Molecular Biology, SUNY Health Science Center at Syracuse, Syracuse, New York 13210, USA.
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Abstract
The interaction of the bovine opsin apoprotein with transducin in rod outer segment membranes was investigated using a guanyl nucleotide exchange assay. In exhaustive binding experiments, opsin activates transducin, with half-maximal exchange activity occurring at 0.8 mol of opsin/mol of transducin. The opsin activity was light-insensitive, hydroxylamine-resistant, unaffected by stoichiometric concentrations of retinaloxime, and more heat-labile than rhodopsin. The t1/2 of transducin activation in the presence of excess opsin was 8.5 min, compared with 0.7 min for metarhodopsin (II). The second-order rate constants were determined to be 0.012 pmol of guanosine 5'-(gamma-thio)triphosphate (GTP gamma S) bound per min/nM opsin and 0.35 pmol of GTP gamma S bound per min/nM metarhodopsin (II). Opsin was able to activate more than one transducin, although there appeared to be a turnover-dependent inactivation of the apoprotein. Opsin showed a broad pH range (5.8-7.4) for optimal activity, with no activity in buffers of pH > 9, whereas metarhodopsin (II) exhibited activity at pH > 9. Regulation of opsin activity by stoichiometric amounts of retinal was observed, with inhibition by 11-cis-retinal and stimulation by all-trans-retinal. A model for opsin activity is proposed.
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Affiliation(s)
- A Surya
- Department of Biochemistry and Molecular Biology, State University of New York Health Science Center, Syracuse 13210
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