1
|
Qi F, Chen J, Chen Y, Sun J, Lin Y, Chen Z, Kapranov P. Evaluating Performance of Different RNA Secondary Structure Prediction Programs Using Self-cleaving Ribozymes. GENOMICS, PROTEOMICS & BIOINFORMATICS 2024; 22:qzae043. [PMID: 39317944 DOI: 10.1093/gpbjnl/qzae043] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 03/02/2024] [Accepted: 06/05/2024] [Indexed: 09/26/2024]
Abstract
Accurate identification of the correct, biologically relevant RNA structures is critical to understanding various aspects of RNA biology since proper folding represents the key to the functionality of all types of RNA molecules and plays pivotal roles in many essential biological processes. Thus, a plethora of approaches have been developed to predict, identify, or solve RNA structures based on various computational, molecular, genetic, chemical, or physicochemical strategies. Purely computational approaches hold distinct advantages over all other strategies in terms of the ease of implementation, time, speed, cost, and throughput, but they strongly underperform in terms of accuracy that significantly limits their broader application. Nonetheless, the advantages of these methods led to a steady development of multiple in silico RNA secondary structure prediction approaches including recent deep learning-based programs. Here, we compared the accuracy of predictions of biologically relevant secondary structures of dozens of self-cleaving ribozyme sequences using seven in silico RNA folding prediction tools with tasks of varying complexity. We found that while many programs performed well in relatively simple tasks, their performance varied significantly in more complex RNA folding problems. However, in general, a modern deep learning method outperformed the other programs in the complex tasks in predicting the RNA secondary structures, at least based on the specific class of sequences tested, suggesting that it may represent the future of RNA structure prediction algorithms.
Collapse
Affiliation(s)
- Fei Qi
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen 361102, China
- Institute of Genomics, School of Medicine, Huaqiao University, Xiamen 361021, China
| | - Junjie Chen
- Institute of Genomics, School of Medicine, Huaqiao University, Xiamen 361021, China
| | - Yue Chen
- Institute of Genomics, School of Medicine, Huaqiao University, Xiamen 361021, China
| | - Jianfeng Sun
- Botnar Research Centre, University of Oxford, Oxford, OX3 7LD, United Kingdom
| | - Yiting Lin
- Institute of Genomics, School of Medicine, Huaqiao University, Xiamen 361021, China
| | - Zipeng Chen
- Institute of Genomics, School of Medicine, Huaqiao University, Xiamen 361021, China
| | - Philipp Kapranov
- State Key Laboratory of Cellular Stress Biology, School of Life Sciences, Faculty of Medicine and Life Sciences, Xiamen University, Xiamen 361102, China
| |
Collapse
|
2
|
Brischigliaro M, Krüger A, Moran JC, Antonicka H, Ahn A, Shoubridge EA, Rorbach J, Barrientos A. The human mitochondrial translation factor TACO1 alleviates mitoribosome stalling at polyproline stretches. Nucleic Acids Res 2024; 52:9710-9726. [PMID: 39036954 PMCID: PMC11381339 DOI: 10.1093/nar/gkae645] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2024] [Revised: 07/04/2024] [Accepted: 07/09/2024] [Indexed: 07/23/2024] Open
Abstract
The prokaryotic translation elongation factor P (EF-P) and the eukaryotic/archaeal counterparts eIF5A/aIF5A are proteins that serve a crucial role in mitigating ribosomal stalling during the translation of specific sequences, notably those containing consecutive proline residues (1,2). Although mitochondrial DNA-encoded proteins synthesized by mitochondrial ribosomes also contain polyproline stretches, an EF-P/eIF5A mitochondrial counterpart remains unidentified. Here, we show that the missing factor is TACO1, a protein causative of a juvenile form of neurodegenerative Leigh's syndrome associated with cytochrome c oxidase deficiency, until now believed to be a translational activator of COX1 mRNA. By using a combination of metabolic labeling, puromycin release and mitoribosome profiling experiments, we show that TACO1 is required for the rapid synthesis of the polyproline-rich COX1 and COX3 cytochrome c oxidase subunits, while its requirement is negligible for other mitochondrial DNA-encoded proteins. In agreement with a role in translation efficiency regulation, we show that TACO1 cooperates with the N-terminal extension of the large ribosomal subunit bL27m to provide stability to the peptidyl-transferase center during elongation. This study illuminates the translation elongation dynamics within human mitochondria, a TACO1-mediated biological mechanism in place to mitigate mitoribosome stalling at polyproline stretches during protein synthesis, and the pathological implications of its malfunction.
Collapse
Affiliation(s)
- Michele Brischigliaro
- Department of Neurology, University of Miami Miller School of Medicine, 1600 NW 10th Ave., Miami, FL 33136, USA
| | - Annika Krüger
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
- Max Planck Institute Biology of Ageing-Karolinska Institutet Laboratory, Karolinska Institutet, Stockholm, Sweden
| | - J Conor Moran
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, 1600 NW 10th Ave., Miami, FL 33136, USA
- The University of Miami Medical Scientist Training Program (MSTP), 1600 NW 10th Ave.,Miami, FL33136, USA
| | - Hana Antonicka
- The Neuro and Department of Human Genetics, McGill University, Montreal, QC, Canada
| | - Ahram Ahn
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, 1600 NW 10th Ave., Miami, FL 33136, USA
| | - Eric A Shoubridge
- The Neuro and Department of Human Genetics, McGill University, Montreal, QC, Canada
| | - Joanna Rorbach
- Department of Medical Biochemistry and Biophysics, Karolinska Institutet, Stockholm, Sweden
- Max Planck Institute Biology of Ageing-Karolinska Institutet Laboratory, Karolinska Institutet, Stockholm, Sweden
| | - Antoni Barrientos
- Department of Neurology, University of Miami Miller School of Medicine, 1600 NW 10th Ave., Miami, FL 33136, USA
- Department of Biochemistry and Molecular Biology, University of Miami Miller School of Medicine, 1600 NW 10th Ave., Miami, FL 33136, USA
- The Miami Veterans Affairs (VA) Medical System. 1201 NW 16th St, Miami, FL-33125, USA
| |
Collapse
|
3
|
Brewer TE, Wagner A. Horizontal Gene Transfer of a key Translation Factor and its Role in Polyproline Proteome Evolution. Mol Biol Evol 2024; 41:msae180. [PMID: 39189989 PMCID: PMC11388002 DOI: 10.1093/molbev/msae180] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/09/2023] [Revised: 08/05/2024] [Accepted: 08/20/2024] [Indexed: 08/28/2024] Open
Abstract
Prolines cause ribosomes to stall during translation due to their rigid structure. This phenomenon occurs in all domains of life and is exacerbated at polyproline motifs. Such stalling can be eased by the elongation factor P (EF-P) in bacteria. We discovered a potential connection between the loss of ancestral EF-P, the appearance of horizontally transferred EF-P variants, and genomic signs of EF-P dysfunction. Horizontal transfer of the efp gene has occurred several times among bacteria and is associated with the loss of highly conserved polyproline motifs. In this study, we pinpoint cases of horizontal EF-P transfer among a diverse set of bacteria and examine genomic features associated with these events in the phyla Thermotogota and Planctomycetes. In these phyla, horizontal EF-P transfer is also associated with the loss of entire polyproline motif-containing proteins, whose expression is likely dependent on EF-P. In particular, three proteases (Lon, ClpC, and FtsH) and three tRNA synthetases (ValS, IleS1, and IleS2) appear highly sensitive to EF-P transfer. The conserved polyproline motifs within these proteins all reside within close proximity to ATP-binding-regions, some of which are crucial for their function. Our work shows that an ancient EF-P dysfunction has left genomic traces that persist to this day, although it remains unclear whether this dysfunction was strictly due to loss of ancestral EF-P or was related to the appearance of an exogenous variant. The latter possibility would imply that the process of "domesticating" a horizontally transferred efp gene can perturb the overall function of EF-P.
Collapse
Affiliation(s)
- Tess E Brewer
- Faculty of Biology, Microbiology, Ludwig Maximilian University of Munich, Munich, Germany
| | - Andreas Wagner
- Institute of Evolutionary Biology and Environmental Studies, University of Zurich, Zurich, Switzerland
- Swiss Institute of Bioinformatics, Lausanne, Switzerland
- Santa Fe Institute, Santa Fe, NM, USA
| |
Collapse
|
4
|
Tomasiunaite U, Kielkowski P, Krafczyk R, Forné I, Imhof A, Jung K. Decrypting the functional design of unmodified translation elongation factor P. Cell Rep 2024; 43:114063. [PMID: 38635400 DOI: 10.1016/j.celrep.2024.114063] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2023] [Revised: 01/17/2024] [Accepted: 03/21/2024] [Indexed: 04/20/2024] Open
Abstract
Bacteria overcome ribosome stalling by employing translation elongation factor P (EF-P), which requires post-translational modification (PTM) for its full activity. However, EF-Ps of the PGKGP subfamily are unmodified. The mechanism behind the ability to avoid PTM while retaining active EF-P requires further examination. Here, we investigate the design principles governing the functionality of unmodified EF-Ps in Escherichia coli. We screen for naturally unmodified EF-Ps with activity in E. coli and discover that the EF-P from Rhodomicrobium vannielii rescues growth defects of a mutant lacking the modification enzyme EF-P-(R)-β-lysine ligase. We identify amino acids in unmodified EF-P that modulate its activity. Ultimately, we find that substitution of these amino acids in other marginally active EF-Ps of the PGKGP subfamily leads to fully functional variants in E. coli. These results provide strategies to improve heterologous expression of proteins with polyproline motifs in E. coli and give insights into cellular adaptations to optimize protein synthesis.
Collapse
Affiliation(s)
- Urte Tomasiunaite
- Faculty of Biology, Microbiology, Ludwig-Maximilians-Universität München, 82152 Martinsried, Germany
| | - Pavel Kielkowski
- Department of Chemistry, Institut für Chemische Epigenetik (ICEM), Ludwig-Maximilians-Universität München, 81375 Munich, Germany
| | - Ralph Krafczyk
- Faculty of Biology, Microbiology, Ludwig-Maximilians-Universität München, 82152 Martinsried, Germany
| | - Ignasi Forné
- Zentrallabor für Proteinanalytik, Biomedical Center Munich, Ludwig-Maximilians-Universität München, 82152 Martinsried, Germany
| | - Axel Imhof
- Zentrallabor für Proteinanalytik, Biomedical Center Munich, Ludwig-Maximilians-Universität München, 82152 Martinsried, Germany
| | - Kirsten Jung
- Faculty of Biology, Microbiology, Ludwig-Maximilians-Universität München, 82152 Martinsried, Germany.
| |
Collapse
|
5
|
Abstract
The universally conserved protein elongation factor P (EF-P) facilitates translation at amino acids that form peptide bonds with low efficiency, particularly polyproline tracts. Despite its wide conservation, it is not essential in most bacteria and its physiological role remains unclear. Here, we show that EF-P affects the process of sporulation initiation in the bacterium Bacillus subtilis. We observe that the lack of EF-P delays expression of sporulation-specific genes. Using ribosome profiling, we observe that expression of spo0A, encoding a transcription factor that functions as the master regulator of sporulation, is lower in a Δefp strain than the wild type. Ectopic expression of Spo0A rescues the sporulation initiation phenotype, indicating that reduced spo0A expression explains the sporulation defect in Δefp cells. Since Spo0A is the earliest sporulation transcription factor, these data suggest that sporulation initiation can be delayed when protein synthesis is impaired. IMPORTANCE Elongation factor P (EF-P) is a universally conserved translation factor that prevents ribosome stalling at amino acids that form peptide bonds with low efficiency, particularly polyproline tracts. Phenotypes associated with EF-P deletion are pleiotropic, and the mechanistic basis underlying many of these phenotypes is unclear. Here, we show that the absence of EF-P affects the ability of B. subtilis to initiate sporulation by preventing normal expression of Spo0A, the key transcriptional regulator of this process. These data illustrate a mechanism that accounts for the sporulation delay and further suggest that cells are capable of sensing translation stress before committing to sporulation.
Collapse
|
6
|
Mudryi V, Peske F, Rodnina M. Translation Factor Accelerating Peptide Bond Formation on the Ribosome: EF-P and eIF5A as Entropic Catalysts and a Potential Drug Targets. BBA ADVANCES 2023; 3:100074. [PMID: 37082265 PMCID: PMC10074943 DOI: 10.1016/j.bbadva.2023.100074] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/19/2022] [Revised: 01/06/2023] [Accepted: 01/07/2023] [Indexed: 01/11/2023] Open
Abstract
Elongation factor P (EF-P) and its eukaryotic homolog eIF5A are auxiliary translation factors that facilitate peptide bond formation when several sequential proline (Pro) residues are incorporated into the nascent chain. EF-P and eIF5A bind to the exit (E) site of the ribosome and contribute to favorable entropy of the reaction by stabilizing tRNA binding in the peptidyl transferase center of the ribosome. In most organisms, EF-P and eIF5A carry a posttranslational modification that is crucial for catalysis. The chemical nature of the modification varies between different groups of bacteria and between pro- and eukaryotes, making the EF-P-modification enzymes promising targets for antibiotic development. In this review, we summarize our knowledge of the structure and function of EF-P and eIF5A, describe their modification enzymes, and present an approach for potential drug screening aimed at EarP, an enzyme that is essential for EF-P modification in several pathogenic bacteria.
Collapse
|
7
|
Choi UY, Lee JJ, Park A, Jung KL, Lee SA, Choi YJ, Lee HR, Lai CJ, Eoh H, Jung JU. Herpesvirus-induced spermidine synthesis and eIF5A hypusination for viral episomal maintenance. Cell Rep 2022; 40:111234. [PMID: 35977517 DOI: 10.1016/j.celrep.2022.111234] [Citation(s) in RCA: 8] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/22/2021] [Revised: 05/16/2022] [Accepted: 07/28/2022] [Indexed: 11/03/2022] Open
Abstract
Spermidine is essential for cellular growth and acts as a prerequisite of hypusination, a post-translational modification of eukaryotic initiation factor 5A (eIF5A), allowing the translation of polyproline-containing proteins. Here, we show that oncogenic Kaposi's sarcoma-associated herpesvirus (KSHV) increases spermidine synthesis and eIF5A hypusination to enhance expression of polyproline-containing latency-associated nuclear antigen (LANA) for viral episomal maintenance. KSHV upregulates intracellular spermidine levels by dysregulating polyamine metabolic pathways in three-dimensional (3D) culture and 2D de novo infection conditions. Increased intracellular spermidine leads to increased eIF5A hypusination, ultimately enhancing LANA expression. In contrast, inhibition of spermidine synthesis or eIF5A hypusination alleviates LANA expression, decreasing viral episomal maintenance and KSHV-infected cell proliferation in vitro and in vivo, which is reversed by spermidine supplement. This demonstrates that KSHV hijacks spermidine synthesis and eIF5A hypusination pathways to enhance LANA expression for viral episomal maintenance, suggesting polyamine metabolism and eIF5A hypusination as therapeutic targets for KSHV-induced tumorigenesis.
Collapse
Affiliation(s)
- Un Yung Choi
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA.
| | - Jae Jin Lee
- Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Angela Park
- Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Kyle L Jung
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Shin-Ae Lee
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Youn Jung Choi
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Hye-Ra Lee
- Department of Biotechnology and Bioinformatics, College of Science and Technology, Korea University, Sejong 30019, Republic of Korea
| | - Chih-Jen Lai
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA
| | - Hyungjin Eoh
- Department of Molecular Microbiology and Immunology, Keck School of Medicine, University of Southern California, Los Angeles, CA 90033, USA
| | - Jae U Jung
- Department of Cancer Biology, Lerner Research Institute, Cleveland Clinic, Cleveland, OH 44195, USA.
| |
Collapse
|
8
|
Translation stalling proline motifs are enriched in slow-growing, thermophilic, and multicellular bacteria. THE ISME JOURNAL 2022; 16:1065-1073. [PMID: 34824398 DOI: 10.1038/s41396-021-01154-y] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Subscribe] [Scholar Register] [Received: 06/16/2021] [Revised: 11/09/2021] [Accepted: 11/10/2021] [Indexed: 12/17/2022]
Abstract
Rapid bacterial growth depends on the speed at which ribosomes can translate mRNA into proteins. mRNAs that encode successive stretches of proline can cause ribosomes to stall, substantially reducing translation speed. Such stalling is especially detrimental for species that must grow and divide rapidly. Here, we focus on di-prolyl motifs (XXPPX) and ask whether their prevalence varies with growth rate. To find out we conducted a broad survey of such motifs in >3000 bacterial genomes across 35 phyla. Indeed, fast-growing species encode fewer motifs than slow-growing species, especially in highly expressed proteins. We also found many di-prolyl motifs within thermophiles, where prolines can help maintain proteome stability. Moreover, bacteria with complex, multicellular lifecycles also encode many di-prolyl motifs. This is especially evident in the slow-growing phylum Myxococcota. Bacteria in this phylum encode many serine-threonine kinases, and many di-prolyl motifs at potential phosphorylation sites within these kinases. Serine-threonine kinases are involved in cell signaling and help regulate developmental processes linked to multicellularity in the Myxococcota. Altogether, our observations suggest that weakened selection on translational rate, whether due to slow or thermophilic growth, may allow di-prolyl motifs to take on new roles in biological processes that are unrelated to translational rate.
Collapse
|
9
|
Lassak J, Sieber A, Hellwig M. Exceptionally versatile take II: post-translational modifications of lysine and their impact on bacterial physiology. Biol Chem 2022; 403:819-858. [PMID: 35172419 DOI: 10.1515/hsz-2021-0382] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/30/2021] [Accepted: 01/05/2022] [Indexed: 01/16/2023]
Abstract
Among the 22 proteinogenic amino acids, lysine sticks out due to its unparalleled chemical diversity of post-translational modifications. This results in a wide range of possibilities to influence protein function and hence modulate cellular physiology. Concomitantly, lysine derivatives form a metabolic reservoir that can confer selective advantages to those organisms that can utilize it. In this review, we provide examples of selected lysine modifications and describe their role in bacterial physiology.
Collapse
Affiliation(s)
- Jürgen Lassak
- Department of Biology I, Microbiology, Ludwig-Maximilians-Universität München, Großhaderner Straße 2-4, D-82152 Planegg, Germany
| | - Alina Sieber
- Department of Biology I, Microbiology, Ludwig-Maximilians-Universität München, Großhaderner Straße 2-4, D-82152 Planegg, Germany
| | - Michael Hellwig
- Technische Universität Braunschweig - Institute of Food Chemistry, Schleinitzstraße 20, D-38106 Braunschweig, Germany
| |
Collapse
|
10
|
Tajima K, Katoh T, Suga H. OUP accepted manuscript. Nucleic Acids Res 2022; 50:2736-2753. [PMID: 35188576 PMCID: PMC8934632 DOI: 10.1093/nar/gkac068] [Citation(s) in RCA: 2] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/22/2021] [Revised: 01/13/2022] [Accepted: 02/07/2022] [Indexed: 11/13/2022] Open
Abstract
In ribosomal translation, peptidyl transfer occurs between P-site peptidyl-tRNA and A-site aminoacyl-tRNA, followed by translocation of the resulting P-site deacylated-tRNA and A-site peptidyl-tRNA to E and P site, respectively, mediated by EF-G. Here, we report that mistranslocation of P-site peptidyl-tRNA and A-site aminoacyl-tRNA toward E and A site occurs when high concentration of EF-G triggers the migration of two tRNAs prior to completion of peptidyl transfer. Consecutive incorporation of less reactive amino acids, such as Pro and d-Ala, makes peptidyl transfer inefficient and thus induces the mistranslocation event. Consequently, the E-site peptidyl-tRNA drops off from ribosome to give a truncated peptide lacking the C-terminal region. The P-site aminoacyl-tRNA allows for reinitiation of translation upon accommodation of a new aminoacyl-tRNA at A site, leading to synthesis of a truncated peptide lacking the N-terminal region, which we call the ‘reinitiated peptide’. We also revealed that such a drop-off-reinitiation event can be alleviated by EF-P that promotes peptidyl transfer of Pro. Moreover, this event takes place both in vitro and in cell, showing that reinitiated peptides during protein synthesis could be accumulated in this pathway in cells.
Collapse
Affiliation(s)
- Kenya Tajima
- Department of Chemistry, Graduate School of Science, The University of Tokyo, 7-3-1 Hongo, Bunkyo-ku, Tokyo 113-0033, Japan
| | | | - Hiroaki Suga
- To whom correspondence should be addressed. Tel: +81 3 5841 8372; Fax: +81 3 5841 8372;
| |
Collapse
|
11
|
Comparative ribosome profiling reveals distinct translational landscapes of salt-sensitive and -tolerant rice. BMC Genomics 2021; 22:612. [PMID: 34384368 PMCID: PMC8359061 DOI: 10.1186/s12864-021-07922-6] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/21/2020] [Accepted: 08/03/2021] [Indexed: 01/27/2023] Open
Abstract
BACKGROUND Soil salinization represents a serious threat to global rice production. Although significant research has been conducted to understand salt stress at the genomic, transcriptomic and proteomic levels, few studies have focused on the translatomic responses to this stress. Recent studies have suggested that transcriptional and translational responses to salt stress can often operate independently. RESULTS We sequenced RNA and ribosome-protected fragments (RPFs) from the salt-sensitive rice (O. sativa L.) cultivar 'Nipponbare' (NB) and the salt-tolerant cultivar 'Sea Rice 86' (SR86) under normal and salt stress conditions. A large discordance between salt-induced transcriptomic and translatomic alterations was found in both cultivars, with more translationally regulated genes being observed in SR86 in comparison to NB. A biased ribosome occupancy, wherein RPF depth gradually increased from the 5' ends to the 3' ends of coding regions, was revealed in NB and SR86. This pattern was strengthened by salt stress, particularly in SR86. On the contrary, the strength of ribosome stalling was accelerated in salt-stressed NB but decreased in SR86. CONCLUSIONS This study revealed that translational reprogramming represents an important layer of salt stress responses in rice, and the salt-tolerant cultivar SR86 adopts a more flexible translationally adaptive strategy to cope with salt stress compared to the salt susceptible cultivar NB. The differences in translational dynamics between NB and SR86 may derive from their differing levels of ribosome stalling under salt stress.
Collapse
|
12
|
Krafczyk R, Qi F, Sieber A, Mehler J, Jung K, Frishman D, Lassak J. Proline codon pair selection determines ribosome pausing strength and translation efficiency in bacteria. Commun Biol 2021; 4:589. [PMID: 34002016 PMCID: PMC8129111 DOI: 10.1038/s42003-021-02115-z] [Citation(s) in RCA: 9] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/04/2020] [Accepted: 04/16/2021] [Indexed: 02/03/2023] Open
Abstract
The speed of mRNA translation depends in part on the amino acid to be incorporated into the nascent chain. Peptide bond formation is especially slow with proline and two adjacent prolines can even cause ribosome stalling. While previous studies focused on how the amino acid context of a Pro-Pro motif determines the stalling strength, we extend this question to the mRNA level. Bioinformatics analysis of the Escherichia coli genome revealed significantly differing codon usage between single and consecutive prolines. We therefore developed a luminescence reporter to detect ribosome pausing in living cells, enabling us to dissect the roles of codon choice and tRNA selection as well as to explain the genome scale observations. Specifically, we found a strong selective pressure against CCC/U-C, a sequon causing ribosomal frameshifting even under wild-type conditions. On the other hand, translation efficiency as positive evolutionary driving force led to an overrepresentation of CCG. This codon is not only translated the fastest, but the corresponding prolyl-tRNA reaches almost saturating levels. By contrast, CCA, for which the cognate prolyl-tRNA amounts are limiting, is used to regulate pausing strength. Thus, codon selection both in discrete positions but especially in proline codon pairs can tune protein copy numbers.
Collapse
Affiliation(s)
- Ralph Krafczyk
- grid.5252.00000 0004 1936 973XDepartment of Biology I, Microbiology, Ludwig-Maximilians-Universität München, München, Germany
| | - Fei Qi
- grid.411404.40000 0000 8895 903XInstitute of Genomics, School of Biomedical Sciences, Huaqiao University, Xiamen, China ,grid.6936.a0000000123222966Department of Bioinformatics, Wissenschaftzentrum Weihenstephan, Technische Universität München, Freising, Germany
| | - Alina Sieber
- grid.5252.00000 0004 1936 973XDepartment of Biology I, Microbiology, Ludwig-Maximilians-Universität München, München, Germany
| | - Judith Mehler
- grid.5252.00000 0004 1936 973XDepartment of Biology I, Microbiology, Ludwig-Maximilians-Universität München, München, Germany
| | - Kirsten Jung
- grid.5252.00000 0004 1936 973XDepartment of Biology I, Microbiology, Ludwig-Maximilians-Universität München, München, Germany
| | - Dmitrij Frishman
- grid.6936.a0000000123222966Department of Bioinformatics, Wissenschaftzentrum Weihenstephan, Technische Universität München, Freising, Germany
| | - Jürgen Lassak
- grid.5252.00000 0004 1936 973XDepartment of Biology I, Microbiology, Ludwig-Maximilians-Universität München, München, Germany
| |
Collapse
|
13
|
Pinheiro B, Scheidler CM, Kielkowski P, Schmid M, Forné I, Ye S, Reiling N, Takano E, Imhof A, Sieber SA, Schneider S, Jung K. Structure and Function of an Elongation Factor P Subfamily in Actinobacteria. Cell Rep 2021; 30:4332-4342.e5. [PMID: 32234471 DOI: 10.1016/j.celrep.2020.03.009] [Citation(s) in RCA: 7] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/20/2019] [Revised: 02/06/2020] [Accepted: 03/02/2020] [Indexed: 12/28/2022] Open
Abstract
Translation of consecutive proline motifs causes ribosome stalling and requires rescue via the action of a specific translation elongation factor, EF-P in bacteria and archaeal/eukaryotic a/eIF5A. In Eukarya, Archaea, and all bacteria investigated so far, the functionality of this translation elongation factor depends on specific and rather unusual post-translational modifications. The phylum Actinobacteria, which includes the genera Corynebacterium, Mycobacterium, and Streptomyces, is of both medical and economic significance. Here, we report that EF-P is required in these bacteria in particular for the translation of proteins involved in amino acid and secondary metabolite production. Notably, EF-P of Actinobacteria species does not need any post-translational modification for activation. While the function and overall 3D structure of this EF-P type is conserved, the loop containing the conserved lysine is flanked by two essential prolines that rigidify it. Actinobacteria's EF-P represents a unique subfamily that works without any modification.
Collapse
Affiliation(s)
- Bruno Pinheiro
- Department of Biology I, Microbiology, Ludwig-Maximilians-Universität München, Martinsried, Germany
| | | | - Pavel Kielkowski
- Department of Chemistry, Technische Universität München, Garching, Germany
| | - Marina Schmid
- Department of Biology I, Microbiology, Ludwig-Maximilians-Universität München, Martinsried, Germany
| | - Ignasi Forné
- Biomedical Center Munich, Ludwig-Maximilians-Universität München, Martinsried, Germany
| | - Suhui Ye
- Manchester Institute of Biotechnology, Department of Chemistry, School of Natural Sciences, Faculty of Science and Engineering, University of Manchester, Manchester, UK
| | - Norbert Reiling
- RG Microbial Interface Biology, Research Center Borstel, Leibniz Lung Center, Borstel, Germany; German Center for Infection Research (DZIF), Partner Site Hamburg-Lübeck-Borstel-Riems, Borstel, Germany
| | - Eriko Takano
- Manchester Institute of Biotechnology, Department of Chemistry, School of Natural Sciences, Faculty of Science and Engineering, University of Manchester, Manchester, UK
| | - Axel Imhof
- Biomedical Center Munich, Ludwig-Maximilians-Universität München, Martinsried, Germany
| | - Stephan A Sieber
- Department of Chemistry, Technische Universität München, Garching, Germany
| | - Sabine Schneider
- Department of Chemistry, Ludwig-Maximilians-Universität München, Munich, Germany.
| | - Kirsten Jung
- Department of Biology I, Microbiology, Ludwig-Maximilians-Universität München, Martinsried, Germany.
| |
Collapse
|
14
|
Kubyshkin V, Davis R, Budisa N. Biochemistry of fluoroprolines: the prospect of making fluorine a bioelement. Beilstein J Org Chem 2021; 17:439-460. [PMID: 33727970 PMCID: PMC7934785 DOI: 10.3762/bjoc.17.40] [Citation(s) in RCA: 11] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/05/2020] [Accepted: 01/22/2021] [Indexed: 12/12/2022] Open
Abstract
Due to the heterocyclic structure and distinct conformational profile, proline is unique in the repertoire of the 20 amino acids coded into proteins. Here, we summarize the biochemical work on the replacement of proline with (4R)- and (4S)-fluoroproline as well as 4,4-difluoroproline in proteins done mainly in the last two decades. We first recapitulate the complex position and biochemical fate of proline in the biochemistry of a cell, discuss the physicochemical properties of fluoroprolines, and overview the attempts to use these amino acids as proline replacements in studies of protein production and folding. Fluorinated proline replacements are able to elevate the protein expression speed and yields and improve the thermodynamic and kinetic folding profiles of individual proteins. In this context, fluoroprolines can be viewed as useful tools in the biotechnological toolbox. As a prospect, we envision that proteome-wide proline-to-fluoroproline substitutions could be possible. We suggest a hypothetical scenario for the use of laboratory evolutionary methods with fluoroprolines as a suitable vehicle to introduce fluorine into living cells. This approach may enable creation of synthetic cells endowed with artificial biodiversity, containing fluorine as a bioelement.
Collapse
Affiliation(s)
- Vladimir Kubyshkin
- Department of Chemistry, University of Manitoba, 144 Dysart Rd., Winnipeg, R3T 2N2, Canada
| | - Rebecca Davis
- Department of Chemistry, University of Manitoba, 144 Dysart Rd., Winnipeg, R3T 2N2, Canada
| | - Nediljko Budisa
- Department of Chemistry, University of Manitoba, 144 Dysart Rd., Winnipeg, R3T 2N2, Canada
- Institute of Chemistry, Technical University of Berlin, Müller-Breslau-Str. 10, 10623 Berlin, Germany
| |
Collapse
|
15
|
Hummels KR, Kearns DB. Translation elongation factor P (EF-P). FEMS Microbiol Rev 2020; 44:208-218. [PMID: 32011712 DOI: 10.1093/femsre/fuaa003] [Citation(s) in RCA: 25] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/28/2019] [Accepted: 01/30/2020] [Indexed: 01/01/2023] Open
Abstract
Translation elongation factor P (EF-P) is conserved in all three domains of life (called eIF5A and aIF5A in eukaryotes and archaea, respectively) and functions to alleviate ribosome pausing during the translation of specific sequences, including consecutive proline residues. EF-P was identified in 1975 as a factor that stimulated the peptidyltransferase reaction in vitro but its involvement in the translation of tandem proline residues was not uncovered until 2013. Throughout the four decades of EF-P research, perceptions of EF-P function have changed dramatically. In particular, while EF-P was thought to potentiate the formation of the first peptide bond in a protein, it is now broadly accepted to act throughout translation elongation. Further, EF-P was initially reported to be essential, but recent work has shown that the requirement of EF-P for growth is conditional. Finally, it is thought that post-translational modification of EF-P is strictly required for its function but recent studies suggest that EF-P modification may play a more nuanced role in EF-P activity. Here, we review the history of EF-P research, with an emphasis on its initial isolation and characterization as well as the discoveries that altered our perceptions of its function.
Collapse
Affiliation(s)
| | - Daniel B Kearns
- Department of Biology, Indiana University, Bloomington, IN USA
| |
Collapse
|
16
|
Pinheiro B, Petrov DP, Guo L, Martins GB, Bramkamp M, Jung K. Elongation factor P is required for EII Glc translation in Corynebacterium glutamicum due to an essential polyproline motif. Mol Microbiol 2020; 115:320-331. [PMID: 33012080 DOI: 10.1111/mmi.14618] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [Key Words] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/23/2020] [Revised: 09/25/2020] [Indexed: 12/22/2022]
Abstract
Translating ribosomes require elongation factor P (EF-P) to incorporate consecutive prolines (XPPX) into nascent peptide chains. The proteome of Corynebacterium glutamicum ATCC 13032 contains a total of 1,468 XPPX motifs, many of which are found in proteins involved in primary and secondary metabolism. We show here that synthesis of EIIGlc , the glucose-specific permease of the phosphoenolpyruvate (PEP): sugar phosphotransferase system (PTS) encoded by ptsG, is strongly dependent on EF-P, as an efp deletion mutant grows poorly on glucose as sole carbon source. The amount of EIIGlc is strongly reduced in this mutant, which consequently results in a lower rate of glucose uptake. Strikingly, the XPPX motif is essential for the activity of EIIGlc , and substitution of the prolines leads to inactivation of the protein. Finally, translation of GntR2, a transcriptional activator of ptsG, is also dependent on EF-P. However, its reduced amount in the efp mutant can be compensated for by other regulators. These results reveal for the first time a translational bottleneck involving production of the major glucose transporter EIIGlc , which has implications for future strain engineering strategies.
Collapse
Affiliation(s)
- Bruno Pinheiro
- Department of Biology I, Microbiology, Ludwig-Maximilians-Universität München, Martinsried, Germany
| | - Dimitar Plamenov Petrov
- Department of Biology I, Microbiology, Ludwig-Maximilians-Universität München, Martinsried, Germany
| | - Lingyun Guo
- Department of Biology I, Microbiology, Ludwig-Maximilians-Universität München, Martinsried, Germany
| | | | - Marc Bramkamp
- Institute for General Microbiology, Faculty of Mathematics and Natural Sciences, Christian-Albrechts-Universität zu Kiel, Kiel, Germany
| | - Kirsten Jung
- Department of Biology I, Microbiology, Ludwig-Maximilians-Universität München, Martinsried, Germany
| |
Collapse
|
17
|
Wu J, Subbaiah KCV, Xie LH, Jiang F, Khor ES, Mickelsen D, Myers JR, Tang WHW, Yao P. Glutamyl-Prolyl-tRNA Synthetase Regulates Proline-Rich Pro-Fibrotic Protein Synthesis During Cardiac Fibrosis. Circ Res 2020; 127:827-846. [PMID: 32611237 PMCID: PMC7484271 DOI: 10.1161/circresaha.119.315999] [Citation(s) in RCA: 54] [Impact Index Per Article: 13.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 01/22/2023]
Abstract
RATIONALE Increased protein synthesis of profibrotic genes is a common feature in cardiac fibrosis and heart failure. Despite this observation, critical factors and molecular mechanisms for translational control of profibrotic genes during cardiac fibrosis remain unclear. OBJECTIVE To investigate the role of a bifunctional ARS (aminoacyl-tRNA synthetase), EPRS (glutamyl-prolyl-tRNA synthetase) in translational control of cardiac fibrosis. METHODS AND RESULTS Results from reanalyses of multiple publicly available data sets of human and mouse heart failure, demonstrated that EPRS acted as an integrated node among the ARSs in various cardiac pathogenic processes. We confirmed that EPRS was induced at mRNA and protein levels (≈1.5-2.5-fold increase) in failing hearts compared with nonfailing hearts using our cohort of human and mouse heart samples. Genetic knockout of one allele of Eprs globally (Eprs+/-) using CRISPR-Cas9 technology or in a Postn-Cre-dependent manner (Eprsflox/+; PostnMCM/+) strongly reduces cardiac fibrosis (≈50% reduction) in isoproterenol-, transverse aortic constriction-, and myocardial infarction (MI)-induced heart failure mouse models. Inhibition of EPRS using a PRS (prolyl-tRNA synthetase)-specific inhibitor, halofuginone, significantly decreases translation efficiency (TE) of proline-rich collagens in cardiac fibroblasts as well as TGF-β (transforming growth factor-β)-activated myofibroblasts. Overexpression of EPRS increases collagen protein expression in primary cardiac fibroblasts under TGF-β stimulation. Using transcriptome-wide RNA-Seq and polysome profiling-Seq in halofuginone-treated fibroblasts, we identified multiple novel Pro-rich genes in addition to collagens, such as Ltbp2 (latent TGF-β-binding protein 2) and Sulf1 (sulfatase 1), which are translationally regulated by EPRS. SULF1 is highly enriched in human and mouse myofibroblasts. In the primary cardiac fibroblast culture system, siRNA-mediated knockdown of SULF1 attenuates cardiac myofibroblast activation and collagen deposition. Overexpression of SULF1 promotes TGF-β-induced myofibroblast activation and partially antagonizes anti-fibrotic effects of halofuginone treatment. CONCLUSIONS Our results indicate that EPRS preferentially controls translational activation of proline codon rich profibrotic genes in cardiac fibroblasts and augments pathological cardiac remodeling. Graphical Abstract: A graphical abstract is available for this article.
Collapse
Affiliation(s)
- Jiangbin Wu
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester School of Medicine & Dentistry
| | - Kadiam C Venkata Subbaiah
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester School of Medicine & Dentistry
| | - Li Huitong Xie
- Graduate Program in Genetics, Development and Stem Cells, Department of Biomedical Genetics
| | - Feng Jiang
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester School of Medicine & Dentistry
- Department of Biochemistry & Biophysics, University of Rochester School of Medicine & Dentistry
| | - Eng-Soon Khor
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester School of Medicine & Dentistry
| | - Deanne Mickelsen
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester School of Medicine & Dentistry
| | - Jason R Myers
- Genomics Research Center, University of Rochester School of Medicine & Dentistry, Rochester, New York 14642
| | | | - Peng Yao
- Aab Cardiovascular Research Institute, Department of Medicine, University of Rochester School of Medicine & Dentistry
- Department of Biochemistry & Biophysics, University of Rochester School of Medicine & Dentistry
- The Center for RNA Biology, University of Rochester School of Medicine & Dentistry
- The Center for Biomedical Informatics, University of Rochester School of Medicine & Dentistry
| |
Collapse
|
18
|
Singh V, Kumar N, Dwivedi AK, Sharma R, Sharma MK. Phylogenomic Analysis of R2R3 MYB Transcription Factors in Sorghum and their Role in Conditioning Biofuel Syndrome. Curr Genomics 2020; 21:138-154. [PMID: 32655308 PMCID: PMC7324873 DOI: 10.2174/1389202921666200326152119] [Citation(s) in RCA: 5] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2019] [Revised: 03/17/2020] [Accepted: 03/19/2020] [Indexed: 11/30/2022] Open
Abstract
Background Large scale cultivation of sorghum for food, feed, and biofuel requires concerted efforts for engineering multipurpose cultivars with optimised agronomic traits. Due to their vital role in regulating the biosynthesis of phenylpropanoid-derived compounds, biomass composition, biotic, and abiotic stress response, R2R3-MYB family transcription factors are ideal targets for improving environmental resilience and economic value of sorghum. Methods We used diverse computational biology tools to survey the sorghum genome to identify R2R3-MYB transcription factors followed by their structural and phylogenomic analysis. We used in-house generated as well as publicly available high throughput expression data to analyse the R2R3 expression patterns in various sorghum tissue types. Results We have identified a total of 134 R2R3-MYB genes from sorghum and developed a framework to predict gene functions. Collating information from the physical location, duplication, structural analysis, orthologous sequences, phylogeny, and expression patterns revealed the role of duplications in clade-wise expansion of the R2R3-MYB family as well as intra-clade functional diversification. Using publicly available and in-house generated RNA sequencing data, we provide MYB candidates for conditioning biofuel syndrome by engineering phenylpropanoid biosynthesis and sugar signalling pathways in sorghum. Conclusion The results presented here are pivotal to prioritize MYB genes for functional validation and optimize agronomic traits in sorghum.
Collapse
Affiliation(s)
- Vinay Singh
- 1Crop Genetics & Informatics Group, School of Biotechnology, Jawaharlal Nehru University, New Mehrauli Road, New Delhi-110067, India; 2Crop Genetics & Informatics Group, School of Computational & Integrative Sciences, Jawaharlal Nehru University, New Mehrauli Road, New Delhi-110067, India
| | - Neeraj Kumar
- 1Crop Genetics & Informatics Group, School of Biotechnology, Jawaharlal Nehru University, New Mehrauli Road, New Delhi-110067, India; 2Crop Genetics & Informatics Group, School of Computational & Integrative Sciences, Jawaharlal Nehru University, New Mehrauli Road, New Delhi-110067, India
| | - Anuj K Dwivedi
- 1Crop Genetics & Informatics Group, School of Biotechnology, Jawaharlal Nehru University, New Mehrauli Road, New Delhi-110067, India; 2Crop Genetics & Informatics Group, School of Computational & Integrative Sciences, Jawaharlal Nehru University, New Mehrauli Road, New Delhi-110067, India
| | - Rita Sharma
- 1Crop Genetics & Informatics Group, School of Biotechnology, Jawaharlal Nehru University, New Mehrauli Road, New Delhi-110067, India; 2Crop Genetics & Informatics Group, School of Computational & Integrative Sciences, Jawaharlal Nehru University, New Mehrauli Road, New Delhi-110067, India
| | - Manoj K Sharma
- 1Crop Genetics & Informatics Group, School of Biotechnology, Jawaharlal Nehru University, New Mehrauli Road, New Delhi-110067, India; 2Crop Genetics & Informatics Group, School of Computational & Integrative Sciences, Jawaharlal Nehru University, New Mehrauli Road, New Delhi-110067, India
| |
Collapse
|
19
|
Tollerson R, Ibba M. Translational regulation of environmental adaptation in bacteria. J Biol Chem 2020; 295:10434-10445. [PMID: 32518156 DOI: 10.1074/jbc.rev120.012742] [Citation(s) in RCA: 31] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/11/2020] [Revised: 06/08/2020] [Indexed: 01/26/2023] Open
Abstract
Bacteria must rapidly respond to both intracellular and environmental changes to survive. One critical mechanism to rapidly detect and adapt to changes in environmental conditions is control of gene expression at the level of protein synthesis. At each of the three major steps of translation-initiation, elongation, and termination-cells use stimuli to tune translation rate and cellular protein concentrations. For example, changes in nutrient concentrations in the cell can lead to translational responses involving mechanisms such as dynamic folding of riboswitches during translation initiation or the synthesis of alarmones, which drastically alter cell physiology. Moreover, the cell can fine-tune the levels of specific protein products using programmed ribosome pausing or inducing frameshifting. Recent studies have improved understanding and revealed greater complexity regarding long-standing paradigms describing key regulatory steps of translation such as start-site selection and the coupling of transcription and translation. In this review, we describe how bacteria regulate their gene expression at the three translational steps and discuss how translation is used to detect and respond to changes in the cellular environment. Finally, we appraise the costs and benefits of regulation at the translational level in bacteria.
Collapse
Affiliation(s)
- Rodney Tollerson
- Department of Microbiology and Center for RNA Biology, Ohio State University, Columbus, Ohio, USA
| | - Michael Ibba
- Department of Microbiology and Center for RNA Biology, Ohio State University, Columbus, Ohio, USA
| |
Collapse
|
20
|
Brameyer S, Hoyer E, Bibinger S, Burdack K, Lassak J, Jung K. Molecular design of a signaling system influences noise in protein abundance under acid stress in different γ-Proteobacteria. J Bacteriol 2020; 202:JB.00121-20. [PMID: 32482722 PMCID: PMC8404709 DOI: 10.1128/jb.00121-20] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/05/2020] [Accepted: 05/22/2020] [Indexed: 12/16/2022] Open
Abstract
Bacteria have evolved different signaling systems to sense and adapt to acid stress. One of these systems, the CadABC-system, responds to a combination of low pH and lysine availability. In Escherichia coli, the two signals are sensed by the pH sensor and transcription activator CadC and the co-sensor LysP, a lysine-specific transporter. Activated CadC promotes the transcription of the cadBA operon, which codes for the lysine decarboxylase CadA and the lysine/cadaverine antiporter CadB. The copy number of CadC is controlled translationally. Using a bioinformatics approach, we identified the presence of CadC with ribosomal stalling motifs together with LysP in species of the Enterobacteriaceae family. In contrast, we identified CadC without stalling motifs in species of the Vibrionaceae family, but the LysP co-sensor was not identified. Therefore, we compared the output of the Cad system in single cells of the distantly related organisms E. coli and V. campbellii using fluorescently-tagged CadB as the reporter. We observed a heterogeneous output in E. coli, and all the V. campbellii cells produced CadB. The copy number of the pH sensor CadC in E. coli was extremely low (≤4 molecules per cell), but it was 10-fold higher in V. campbellii An increase in the CadC copy number in E. coli correlated with a decrease in heterogeneous behavior. This study demonstrated how small changes in the design of a signaling system allow a homogeneous output and, thus, adaptation of Vibrio species that rely on the CadABC-system as the only acid resistance system.Importance Acid resistance is an important property of bacteria, such as Escherichia coli, to survive acidic environments like the human gastrointestinal tract. E. coli possess both passive and inducible acid resistance systems to counteract acidic environments. Thus, E. coli evolved sophisticated signaling systems to sense and appropriately respond to environmental acidic stress by regulating the activity of its three inducible acid resistance systems. One of these systems is the Cad system that is only induced under moderate acidic stress in a lysine-rich environment by the pH-responsive transcriptional regulator CadC. The significance of our research is in identifying the molecular design of the Cad systems in different Proteobacteria and their target expression noise at single cell level during acid stress conditions.
Collapse
Affiliation(s)
- Sophie Brameyer
- Department of Biology I, Microbiology, Ludwig-Maximilians-Universität München, Martinsried, Germany
| | - Elisabeth Hoyer
- Department of Biology I, Microbiology, Ludwig-Maximilians-Universität München, Martinsried, Germany
| | - Sebastian Bibinger
- Department of Biology I, Microbiology, Ludwig-Maximilians-Universität München, Martinsried, Germany
| | - Korinna Burdack
- Department of Biology I, Microbiology, Ludwig-Maximilians-Universität München, Martinsried, Germany
| | - Jürgen Lassak
- Department of Biology I, Microbiology, Ludwig-Maximilians-Universität München, Martinsried, Germany
| | - Kirsten Jung
- Department of Biology I, Microbiology, Ludwig-Maximilians-Universität München, Martinsried, Germany
| |
Collapse
|
21
|
Suplatov D, Timonina D, Sharapova Y, Švedas V. Yosshi: a web-server for disulfide engineering by bioinformatic analysis of diverse protein families. Nucleic Acids Res 2020; 47:W308-W314. [PMID: 31106356 PMCID: PMC6602428 DOI: 10.1093/nar/gkz385] [Citation(s) in RCA: 14] [Impact Index Per Article: 3.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/28/2019] [Revised: 04/29/2019] [Accepted: 05/01/2019] [Indexed: 01/24/2023] Open
Abstract
Disulfide bonds play a significant role in protein stability, function or regulation but are poorly conserved among evolutionarily related proteins. The Yosshi can help to understand the role of S–S bonds by comparing sequences and structures of homologs with diverse properties and different disulfide connectivity patterns within a common structural fold of a superfamily, and assist to select the most promising hot-spots to improve stability of proteins/enzymes or modulate their functions by introducing naturally occurring crosslinks. The bioinformatic analysis is supported by the integrated Mustguseal web-server to construct large structure-guided sequence alignments of functionally diverse protein families that can include thousands of proteins based on all available information in public databases. The Yosshi+Mustguseal is a new integrated web-tool for a systematic homology-driven analysis and engineering of S–S bonds that facilitates a broader interpretation of disulfides not just as a factor of structural stability, but rather as a mechanism to implement functional diversity within a superfamily. The results can be downloaded as a content-rich PyMol session file or further studied online using the HTML5-based interactive analysis tools. Both web-servers are free and open to all users at https://biokinet.belozersky.msu.ru/yosshi and there is no login requirement.
Collapse
Affiliation(s)
- Dmitry Suplatov
- Lomonosov Moscow State University, Belozersky Institute of Physicochemical Biology and Faculty of Bioengineering and Bioinformatics, Vorobjev hills 1-73, Moscow 119991, Russia
| | - Daria Timonina
- Lomonosov Moscow State University, Belozersky Institute of Physicochemical Biology and Faculty of Bioengineering and Bioinformatics, Vorobjev hills 1-73, Moscow 119991, Russia
| | - Yana Sharapova
- Lomonosov Moscow State University, Belozersky Institute of Physicochemical Biology and Faculty of Bioengineering and Bioinformatics, Vorobjev hills 1-73, Moscow 119991, Russia
| | - Vytas Švedas
- Lomonosov Moscow State University, Belozersky Institute of Physicochemical Biology and Faculty of Bioengineering and Bioinformatics, Vorobjev hills 1-73, Moscow 119991, Russia
| |
Collapse
|
22
|
Golubev AA, Validov SZ, Usachev KS, Yusupov MM. Elongation Factor P: New Mechanisms of Function and an Evolutionary Diversity of Translation Regulation. Mol Biol 2019. [DOI: 10.1134/s0026893319040034] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/23/2022]
|
23
|
Volkwein W, Krafczyk R, Jagtap PKA, Parr M, Mankina E, Macošek J, Guo Z, Fürst MJLJ, Pfab M, Frishman D, Hennig J, Jung K, Lassak J. Switching the Post-translational Modification of Translation Elongation Factor EF-P. Front Microbiol 2019; 10:1148. [PMID: 31178848 PMCID: PMC6544042 DOI: 10.3389/fmicb.2019.01148] [Citation(s) in RCA: 12] [Impact Index Per Article: 2.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/30/2019] [Accepted: 05/06/2019] [Indexed: 12/31/2022] Open
Abstract
Tripeptides with two consecutive prolines are the shortest and most frequent sequences causing ribosome stalling. The bacterial translation elongation factor P (EF-P) relieves this arrest, allowing protein biosynthesis to continue. A seven amino acids long loop between beta-strands β3/β4 is crucial for EF-P function and modified at its tip by lysylation of lysine or rhamnosylation of arginine. Phylogenetic analyses unveiled an invariant proline in the -2 position of the modification site in EF-Ps that utilize lysine modifications such as Escherichia coli. Bacteria with the arginine modification like Pseudomonas putida on the contrary have selected against it. Focusing on the EF-Ps from these two model organisms we demonstrate the importance of the β3/β4 loop composition for functionalization by chemically distinct modifications. Ultimately, we show that only two amino acid changes in E. coli EF-P are needed for switching the modification strategy from lysylation to rhamnosylation.
Collapse
Affiliation(s)
- Wolfram Volkwein
- Center for Integrated Protein Science Munich, Department of Biology I, Microbiology, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Ralph Krafczyk
- Center for Integrated Protein Science Munich, Department of Biology I, Microbiology, Ludwig-Maximilians-Universität München, Munich, Germany
| | | | - Marina Parr
- Department of Bioinformatics, Wissenschaftszentrum Weihenstephan, Technische Universität München, Freising, Germany.,St. Petersburg State Polytechnic University, Saint Petersburg, Russia
| | - Elena Mankina
- Department of Bioinformatics, Wissenschaftszentrum Weihenstephan, Technische Universität München, Freising, Germany
| | - Jakub Macošek
- Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg, Germany.,Faculty of Biosciences, Collaboration for Joint PhD Degree Between EMBL and Heidelberg University, Heidelberg, Germany
| | - Zhenghuan Guo
- Center for Integrated Protein Science Munich, Department of Biology I, Microbiology, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Maximilian Josef Ludwig Johannes Fürst
- Center for Integrated Protein Science Munich, Department of Biology I, Microbiology, Ludwig-Maximilians-Universität München, Munich, Germany.,Molecular Enzymology Group, University of Groningen, Groningen, Netherlands
| | - Miriam Pfab
- Center for Integrated Protein Science Munich, Department of Biology I, Microbiology, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Dmitrij Frishman
- Department of Bioinformatics, Wissenschaftszentrum Weihenstephan, Technische Universität München, Freising, Germany.,St. Petersburg State Polytechnic University, Saint Petersburg, Russia
| | - Janosch Hennig
- Structural and Computational Biology Unit, European Molecular Biology Laboratory, Heidelberg, Germany
| | - Kirsten Jung
- Center for Integrated Protein Science Munich, Department of Biology I, Microbiology, Ludwig-Maximilians-Universität München, Munich, Germany
| | - Jürgen Lassak
- Center for Integrated Protein Science Munich, Department of Biology I, Microbiology, Ludwig-Maximilians-Universität München, Munich, Germany
| |
Collapse
|
24
|
Seip B, Sacheau G, Dupuy D, Innis CA. Ribosomal stalling landscapes revealed by high-throughput inverse toeprinting of mRNA libraries. Life Sci Alliance 2018; 1:e201800148. [PMID: 30456383 PMCID: PMC6238534 DOI: 10.26508/lsa.201800148] [Citation(s) in RCA: 7] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2018] [Revised: 09/25/2018] [Accepted: 09/27/2018] [Indexed: 11/24/2022] Open
Abstract
High-throughput inverse toeprinting identifies peptide-encoding transcripts that induce ribosome stalling and allows the systematic analysis of sequence-dependent translational events. Although it is known that the amino acid sequence of a nascent polypeptide can impact its rate of translation, dedicated tools to systematically investigate this process are lacking. Here, we present high-throughput inverse toeprinting, a method to identify peptide-encoding transcripts that induce ribosomal stalling in vitro. Unlike ribosome profiling, inverse toeprinting protects the entire coding region upstream of a stalled ribosome, making it possible to work with random or focused transcript libraries that efficiently sample the sequence space. We used inverse toeprinting to characterize the stalling landscapes of free and drug-bound Escherichia coli ribosomes, obtaining a comprehensive list of arrest motifs that were validated in vivo, along with a quantitative measure of their pause strength. Thanks to the modest sequencing depth and small amounts of material required, inverse toeprinting provides a highly scalable and versatile tool to study sequence-dependent translational processes.
Collapse
Affiliation(s)
- Britta Seip
- Institut Européen de Chimie et Biologie, Université de Bordeaux, Institut National de la Santé et de la Recherche Médicale and Centre National de la Recherche Scientifique, Pessac, France
| | - Guénaël Sacheau
- Institut Européen de Chimie et Biologie, Université de Bordeaux, Institut National de la Santé et de la Recherche Médicale and Centre National de la Recherche Scientifique, Pessac, France
| | - Denis Dupuy
- Institut Européen de Chimie et Biologie, Université de Bordeaux, Institut National de la Santé et de la Recherche Médicale and Centre National de la Recherche Scientifique, Pessac, France
| | - C Axel Innis
- Institut Européen de Chimie et Biologie, Université de Bordeaux, Institut National de la Santé et de la Recherche Médicale and Centre National de la Recherche Scientifique, Pessac, France
| |
Collapse
|
25
|
Elongation factor P is required to maintain proteome homeostasis at high growth rate. Proc Natl Acad Sci U S A 2018; 115:11072-11077. [PMID: 30297417 DOI: 10.1073/pnas.1812025115] [Citation(s) in RCA: 25] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/06/2023] Open
Abstract
Elongation factor P (EF-P) is a universally conserved translation factor that alleviates ribosome pausing at polyproline (PPX) motifs by facilitating peptide bond formation. In the absence of EF-P, PPX peptide bond formation can limit translation rate, leading to pleotropic phenotypes including slowed growth, increased antibiotic sensitivity, and loss of virulence. In this study, we observe that many of these phenotypes are dependent on growth rate. Limiting growth rate suppresses a variety of detrimental phenotypes associated with ribosome pausing at PPX motifs in the absence of EF-P. Polysome levels are also similar to wild-type under slow growth conditions, consistent with global changes in ribosome queuing in cells without EF-P when growth rate is decreased. Inversely, under high protein synthesis demands, we observe that Escherichia coli lacking EF-P have reduced fitness. Our data demonstrate that EF-P-mediated relief of ribosome queuing is required to maintain proteome homeostasis under conditions of high translational demands.
Collapse
|
26
|
Sayers J, Karpati PMT, Mitchell NJ, Goldys AM, Kwong SM, Firth N, Chan B, Payne RJ. Construction of Challenging Proline–Proline Junctions via Diselenide–Selenoester Ligation Chemistry. J Am Chem Soc 2018; 140:13327-13334. [DOI: 10.1021/jacs.8b07877] [Citation(s) in RCA: 44] [Impact Index Per Article: 7.3] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/28/2022]
Affiliation(s)
- Jessica Sayers
- School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
| | | | | | - Anna M. Goldys
- School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
| | - Stephen M. Kwong
- School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW 2006, Australia
| | - Neville Firth
- School of Life and Environmental Sciences, The University of Sydney, Sydney, NSW 2006, Australia
| | - Bun Chan
- Graduate School of Engineering, Nagasaki University, Bunkyo 1-14, Nagasaki 852-8521, Japan
| | - Richard J. Payne
- School of Chemistry, The University of Sydney, Sydney, NSW 2006, Australia
| |
Collapse
|
27
|
The role of polyproline motifs in the histidine kinase EnvZ. PLoS One 2018; 13:e0199782. [PMID: 29953503 PMCID: PMC6023141 DOI: 10.1371/journal.pone.0199782] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/22/2018] [Accepted: 06/13/2018] [Indexed: 12/20/2022] Open
Abstract
Although distinct amino acid motifs containing consecutive prolines (polyP) cause ribosome stalling, which necessitates recruitment of the translation elongation factor P (EF-P), they occur strikingly often in bacterial proteomes. For example, polyP motifs are found in more than half of all histidine kinases in Escherichia coli K-12, which raises the question of their role(s) in receptor function. Here we have investigated the roles of two polyP motifs in the osmosensor and histidine kinase EnvZ. We show that the IPPPL motif in the HAMP domain is required for dimerization of EnvZ. Moreover, replacement of the prolines in this motif by alanines disables the receptor’s sensor function. The second motif, VVPPA, which is located in the periplasmic domain, was found to be required for interaction with the modulator protein MzrA. Our study also reveals that polyP-dependent stalling has little effect on EnvZ levels. Hence, both polyP motifs in EnvZ are primarily involved in protein-protein interaction. Furthermore, while the first motif occurs in almost all EnvZ homologues, the second motif is only found in species that have MzrA, indicating co-evolution of the two proteins.
Collapse
|