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Kuang L, Zeng J, Li Y, Zheng J, Ren Y, Guo Z, Zhang X, Zhang C, Yang C, Mei X, Yang R, Tang L, Ji Y, Xie X, Lei M, Li C. Delineating molecular regulatory network of meat quality of longissimus dorsi indicated by transcriptomic, proteomic, and metabolomics analysis in rabbit. J Proteomics 2024; 300:105179. [PMID: 38657733 DOI: 10.1016/j.jprot.2024.105179] [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: 11/16/2023] [Revised: 04/16/2024] [Accepted: 04/20/2024] [Indexed: 04/26/2024]
Abstract
This study aims to investigate the potential regulatory network responsible for the meat quality using multi-omics to help developing better varieties. Slaughter performance and meat quality of Shuxing No.1 rabbit outperformed IRA rabbit according to the tested rabbit parameters. Differentially expressed genes (DEGs) and differentially abundance proteins (DAPs) were involved in meat quality-related pathways, such as PI3K - Akt and MAPK signaling pathways. Only SMTNL1 and PM20D2 shared between DEGs and DAPs. Olfactory-sensitive undecanal, a differentially abundant metabolite (DAM) in volatilomics (vDAMs), correlated with all of the remaining 11 vDAMs, and most of 12 vDAMs were associated with amino acid metabolism. Integration revealed that 829 DEGs/DAPs were associated with 15 DAMs in four KEGG pathways, such as melatonin (a DAM in widely targeted metabolomics) was significantly positively correlated with ALDH and negatively correlated with RAB3D and CAT in the tryptophan metabolism pathway. This study sheds light on the potential mechanisms that contribute to the improved meat quality and flavor. SIGNIFICANCE: Shuxing No.1 rabbit is a new breed of meat rabbit in the Chinese market. In meat marketing, meat quality usually determines the purchase intention of consumers. Determining the biological and molecular mechanisms of meat quality in meat rabbit is essential for developing strategies to improve meat quality. According to the tested rabbit parameters, this study ascertained that the slaughter performance and meat quality of Shuxing No.1 rabbit surpasses that of IRA rabbit. The present study profiled the transcriptome, proteome, widely targeted metabolome, and volatilome of longissimus dorsi from Shuxing No.1 rabbit and IRA rabbit. The study found that meat quality and flavor-related tryptophan metabolism pathway is enriched with many DEGs/DAPs (including ALDH, RAB3D, and CAT), as well as a DAM, melatonin. This study sheds light on the potential mechanisms that contribute to the improved meat quality and flavor.
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Affiliation(s)
- Liangde Kuang
- Sichuan Animal Science Academy, Chengdu 610066, Sichuan, China; Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu 610066, Sichuan, China
| | - Jianhong Zeng
- Sichuan Animal Science Academy, Chengdu 610066, Sichuan, China; Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu 610066, Sichuan, China
| | - Yuying Li
- Sichuan Animal Science Academy, Chengdu 610066, Sichuan, China; Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu 610066, Sichuan, China
| | - Jie Zheng
- Sichuan Animal Science Academy, Chengdu 610066, Sichuan, China; Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu 610066, Sichuan, China
| | - Yongjun Ren
- Sichuan Animal Science Academy, Chengdu 610066, Sichuan, China; Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu 610066, Sichuan, China
| | - Zhiqiang Guo
- Sichuan Animal Science Academy, Chengdu 610066, Sichuan, China; Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu 610066, Sichuan, China
| | - Xiangyu Zhang
- Sichuan Animal Science Academy, Chengdu 610066, Sichuan, China; Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu 610066, Sichuan, China
| | - Cuixia Zhang
- Sichuan Animal Science Academy, Chengdu 610066, Sichuan, China; Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu 610066, Sichuan, China
| | - Chao Yang
- Sichuan Animal Science Academy, Chengdu 610066, Sichuan, China; Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu 610066, Sichuan, China
| | - Xiuli Mei
- Sichuan Animal Science Academy, Chengdu 610066, Sichuan, China; Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu 610066, Sichuan, China
| | - Rui Yang
- Sichuan Animal Science Academy, Chengdu 610066, Sichuan, China; Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu 610066, Sichuan, China
| | - Li Tang
- Sichuan Animal Science Academy, Chengdu 610066, Sichuan, China; Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu 610066, Sichuan, China
| | - Yang Ji
- Sichuan Animal Science Academy, Chengdu 610066, Sichuan, China; Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu 610066, Sichuan, China
| | - Xiaohong Xie
- Sichuan Animal Science Academy, Chengdu 610066, Sichuan, China; Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu 610066, Sichuan, China
| | - Min Lei
- Sichuan Animal Science Academy, Chengdu 610066, Sichuan, China; Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu 610066, Sichuan, China.
| | - Congyan Li
- Sichuan Animal Science Academy, Chengdu 610066, Sichuan, China; Animal Breeding and Genetics Key Laboratory of Sichuan Province, Chengdu 610066, Sichuan, China.
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Ribeiro DM, Coelho D, Costa M, Carvalho DFP, Leclercq CC, Renaut J, Freire JPB, Almeida AM, Mestre Prates JA. Integrated transcriptomics and proteomics analysis reveals muscle metabolism effects of dietary Ulva lactuca and ulvan lyase supplementation in weaned piglets. Sci Rep 2024; 14:4589. [PMID: 38409238 DOI: 10.1038/s41598-024-55462-2] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2023] [Accepted: 02/23/2024] [Indexed: 02/28/2024] Open
Abstract
Seaweeds, including the green Ulva lactuca, can potentially reduce competition between feed, food, and fuel. They can also contribute to the improved development of weaned piglets. However, their indigestible polysaccharides of the cell wall pose a challenge. This can be addressed through carbohydrase supplementation, such as the recombinant ulvan lyase. The objective of our study was to assess the muscle metabolism of weaned piglets fed with 7% U. lactuca and 0.01% ulvan lyase supplementation, using an integrated transcriptomics (RNA-seq) and proteomics (LC-MS) approach. Feeding piglets with seaweed and enzyme supplementation resulted in reduced macronutrient availability, leading to protein degradation through the proteasome (PSMD2), with resulting amino acids being utilized as an energy source (GOT2, IDH3B). Moreover, mineral element accumulation may have contributed to increased oxidative stress, evident from elevated levels of antioxidant proteins like catalase, as a response to maintaining tissue homeostasis. The upregulation of the gene AQP7, associated with the osmotic stress response, further supports these findings. Consequently, an increase in chaperone activity, including HSP90, was required to repair damaged proteins. Our results suggest that enzymatic supplementation may exacerbate the effects observed from feeding U. lactuca alone, potentially due to side effects of cell wall degradation during digestion.
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Affiliation(s)
- David Miguel Ribeiro
- Associate Laboratory TERRA, LEAF - Linking Landscape, Environment, Agriculture and Food Research Centre, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017, Lisbon, Portugal
| | - Diogo Coelho
- Faculdade de Medicina Veterinária, CIISA - Centre for Interdisciplinary Research in Animal Health, Universidade de Lisboa, 1300-477, Lisbon, Portugal
- Centre of Molecular and Environmental Biology (CBMA), University of Minho, Campus de Gualtar, 4710-057, Braga, Portugal
| | - Mónica Costa
- Faculdade de Medicina Veterinária, CIISA - Centre for Interdisciplinary Research in Animal Health, Universidade de Lisboa, 1300-477, Lisbon, Portugal
- Laboratório Associado para Ciência Animal e Veterinária (AL4AnimalS), Lisbon, Portugal
| | - Daniela Filipa Pires Carvalho
- Associate Laboratory TERRA, LEAF - Linking Landscape, Environment, Agriculture and Food Research Centre, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017, Lisbon, Portugal
| | - Céline C Leclercq
- Biotechnology Environmental Analysis Platform (BEAP), Environmental Research and Innovation Department (ERIN), LIST- Luxembourg Institute of Science and Technology, 5, Rue Bommel, 4940, Hautcharage, Luxembourg
| | - Jenny Renaut
- Biotechnology Environmental Analysis Platform (BEAP), Environmental Research and Innovation Department (ERIN), LIST- Luxembourg Institute of Science and Technology, 5, Rue Bommel, 4940, Hautcharage, Luxembourg
| | - João Pedro Bengala Freire
- Associate Laboratory TERRA, LEAF - Linking Landscape, Environment, Agriculture and Food Research Centre, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017, Lisbon, Portugal
| | - André Martinho Almeida
- Associate Laboratory TERRA, LEAF - Linking Landscape, Environment, Agriculture and Food Research Centre, Instituto Superior de Agronomia, Universidade de Lisboa, Tapada da Ajuda, 1349-017, Lisbon, Portugal
| | - José António Mestre Prates
- Faculdade de Medicina Veterinária, CIISA - Centre for Interdisciplinary Research in Animal Health, Universidade de Lisboa, 1300-477, Lisbon, Portugal.
- Laboratório Associado para Ciência Animal e Veterinária (AL4AnimalS), Lisbon, Portugal.
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3
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Mehta V, Decan N, Ooi S, Gaudreau-Lapierre A, Copeland JW, Trinkle-Mulcahy L. SPECC1L binds the myosin phosphatase complex MYPT1/PP1β and can regulate its distribution between microtubules and filamentous actin. J Biol Chem 2023; 299:102893. [PMID: 36634848 PMCID: PMC9929477 DOI: 10.1016/j.jbc.2023.102893] [Citation(s) in RCA: 3] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2022] [Revised: 12/19/2022] [Accepted: 12/21/2022] [Indexed: 01/11/2023] Open
Abstract
The subcellular localization, activity , and substrate specificity of the serine/threonine protein phosphatase 1 catalytic subunit (PP1cat) is mediated through its dynamic association with regulatory subunits in holoenzyme complexes. While some functional overlap is observed for the three human PP1cat isoforms, they also show distinct targeting based on relative preferences for specific regulatory subunits. A well-known example is the preferential association of MYPT1 with PP1β in the myosin phosphatase complex. In smooth muscle, MYPT1/PP1β counteracts the muscle contraction induced by phosphorylation of the light chains of myosin by the myosin light chain kinase. This phosphatase complex is also found in nonmuscle cells, where it is targeted to both myosin and nonmyosin substrates and contributes to regulation of the balance of cytoskeletal structure and motility during cell migration and division. Although it remains unclear how MYPT1/PP1β traffics between microtubule- and actin-associated substrates, our identification of the microtubule- and actin-binding protein SPECC1L in both the PP1β and MYPT1 interactomes suggests that it is the missing link. Our validation of their association using coimmunoprecipitation and proximity biotinylation assays, together with the strong overlap that we observed for the SPECC1L and MYPT1 interactomes, confirmed that they exist in a stable complex in the cell. We further showed that SPECC1L binds MYPT1 directly and that it can impact the balance of the distribution of the MYPT1/PP1β complex between the microtubule and filamentous actin networks.
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Affiliation(s)
- Virja Mehta
- Department of Cellular and Molecular Medicine, University of Ottawa, Faculty of Medicine, Ottawa, Canada,Ottawa Institute of Systems Biology, University of Ottawa, Ottawa, Canada
| | - Nathalie Decan
- Department of Cellular and Molecular Medicine, University of Ottawa, Faculty of Medicine, Ottawa, Canada,Ottawa Institute of Systems Biology, University of Ottawa, Ottawa, Canada
| | - Sarah Ooi
- Department of Cellular and Molecular Medicine, University of Ottawa, Faculty of Medicine, Ottawa, Canada,Ottawa Institute of Systems Biology, University of Ottawa, Ottawa, Canada
| | - Antoine Gaudreau-Lapierre
- Department of Cellular and Molecular Medicine, University of Ottawa, Faculty of Medicine, Ottawa, Canada,Ottawa Institute of Systems Biology, University of Ottawa, Ottawa, Canada
| | - John W. Copeland
- Department of Cellular and Molecular Medicine, University of Ottawa, Faculty of Medicine, Ottawa, Canada
| | - Laura Trinkle-Mulcahy
- Department of Cellular and Molecular Medicine, University of Ottawa, Faculty of Medicine, Ottawa, Canada; Ottawa Institute of Systems Biology, University of Ottawa, Ottawa, Canada.
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4
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Murali M, Turner SR, Belke DD, Cole WC, MacDonald JA. Smoothelin-like 1 knockout mice display sex-dependent alterations in blood flow and cardiac function. Can J Physiol Pharmacol 2023; 101:27-40. [PMID: 36342379 DOI: 10.1139/cjpp-2022-0172] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
Smoothelin-like 1 (SMTNL1) modulates the contractile performance of smooth muscle and thus has a key role in vascular homeostasis. Elevated vascular tone, recognized as a contributor to the development of progressive cardiac dysfunction, was previously found with SMTNL1 deletion. In this study, we assessed cardiac morphology and function of male and female, wild-type (Smtnl1+/+) and global SMTNL1 knockout (Smtnl1-/-) mice at 10 weeks of age. Gross dissection revealed distinct cardiac morphology only in males; Smtnl1-/- hearts were significantly smaller than Smtnl1+/+, but the left ventricle (LV) proportion of heart mass was greater. Male Smtnl1-/- mice also displayed increased ejection fraction and fractional shortening, as well as elevated aortic and pulmonary flow velocities. The impact of cardiac stress with pressure overload by transverse aortic constriction (TAC) was examined in male mice. With TAC banding, systolic function was preserved, but the LV filling pressure was selectively elevated due to relaxation impairment. Smtnl1-/- mice displayed higher early/passive filling velocity of LV/early mitral annulus velocity ratio (E/E' ratio) and myocardial performance index along with a prolonged isovolumetric relaxation time. Taken together, the findings support a novel, sex-dimorphic role for SMTNL1 in modulating cardiac structure and function of mice.
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Affiliation(s)
- Megha Murali
- Department of Biochemistry & Molecular Biology, Cumming School of Medicine,University of Calgary, 3280 Hospital Drive NW, Calgary, AB T2N 4Z6, Canada
| | - Sara R Turner
- Department of Biochemistry & Molecular Biology, Cumming School of Medicine,University of Calgary, 3280 Hospital Drive NW, Calgary, AB T2N 4Z6, Canada
| | - Darrell D Belke
- Department of Cardiac Sciences, Cumming School of Medicine, University of Calgary, 1403-29 Street NWCalgary, AB T2N 2T9, Canada
| | - William C Cole
- Department of Physiology & Pharmacology, Cumming School of Medicine, University of Calgary, 3330 Hospital Drive NW, Calgary, AB T2N 4N1, Canada
| | - Justin A MacDonald
- Department of Biochemistry & Molecular Biology, Cumming School of Medicine,University of Calgary, 3280 Hospital Drive NW, Calgary, AB T2N 4Z6, Canada
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5
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Wu G, Yang C, Bruce HL, Roy BC, Li X, Zhang C. Effects of Alternating Electric Field Assisted Freezing-Thawing-Aging Sequence on Data-Independent Acquisition Quantitative Proteomics of Longissimus dorsi Muscle. JOURNAL OF AGRICULTURAL AND FOOD CHEMISTRY 2022; 70:12990-13001. [PMID: 36166831 DOI: 10.1021/acs.jafc.2c04207] [Citation(s) in RCA: 6] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/16/2023]
Abstract
This study was designed to investigate the differences in the proteomes of bovine Longissimus dorsi (LD) muscle during an alternating electric field (AEF)-assisted freezing-thawing-aging sequence based on a data-independent acquisition strategy. When compared to that of the only postmortem aging (OA) group, the meat quality of the freezing-thawing-aging sequence (FA) and AEF-assisted freezing-thawing-aging sequence (EA) groups showed a declining trend. However, the group assisted by AEF was significantly enhanced in color, water-holding capacity, and tenderness. Three hundred fifty-two proteins in LD muscle were differentially abundant proteins (DAPs) among FA, EA, and OA treatments. Furthermore, among the 40 DAPs in the FA versus EA comparison, 5 DAPs with variable importance in projection scores higher than 1 were identified as biochemical markers of beef quality. Bioinformatic analysis revealed that most of these proteins were involved in structural constituents of ribosome and catalytic activity. These results provide a basis for further understanding the quality of beef following a freezing-thawing-aging sequence assisted by AEF.
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Affiliation(s)
- Guangyu Wu
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-products Processing, Ministry of Agriculture and Rural Affairs, Beijing100193, P.R. China
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AlbertaT6G 2P5, Canada
| | - Chuan Yang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-products Processing, Ministry of Agriculture and Rural Affairs, Beijing100193, P.R. China
| | - Heather L Bruce
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AlbertaT6G 2P5, Canada
| | - Bimol C Roy
- Department of Agricultural, Food and Nutritional Science, University of Alberta, Edmonton, AlbertaT6G 2P5, Canada
| | - Xia Li
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-products Processing, Ministry of Agriculture and Rural Affairs, Beijing100193, P.R. China
| | - Chunhui Zhang
- Institute of Food Science and Technology, Chinese Academy of Agricultural Sciences, Key Laboratory of Agro-products Processing, Ministry of Agriculture and Rural Affairs, Beijing100193, P.R. China
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6
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Smoothelin-like 2 Inhibits Coronin-1B to Stabilize the Apical Actin Cortex during Epithelial Morphogenesis. Curr Biol 2021; 31:696-706.e9. [PMID: 33275893 DOI: 10.1016/j.cub.2020.11.010] [Citation(s) in RCA: 4] [Impact Index Per Article: 1.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/20/2020] [Revised: 09/24/2020] [Accepted: 11/03/2020] [Indexed: 11/22/2022]
Abstract
The actin cortex is involved in many biological processes and needs to be significantly remodeled during cell differentiation. Developing epithelial cells construct a dense apical actin cortex to carry out their barrier and exchange functions. The apical cortex assembles in response to three-dimensional (3D) extracellular cues, but the regulation of this process during epithelial morphogenesis remains unknown. Here, we describe the function of Smoothelin-like 2 (SMTNL2), a member of the smooth-muscle-related Smoothelin protein family, in apical cortex maturation. SMTNL2 is induced during development in multiple epithelial tissues and localizes to the apical and junctional actin cortex in intestinal and kidney epithelial cells. SMTNL2 deficiency leads to membrane herniations in the apical domain of epithelial cells, indicative of cortex abnormalities. We find that SMTNL2 binds to actin filaments and is required to slow down the turnover of apical actin. We also characterize the SMTNL2 proximal interactome and find that SMTNL2 executes its functions partly through inhibition of coronin-1B. Although coronin-1B-mediated actin dynamics are required for early morphogenesis, its sustained activity is detrimental for the mature apical shape. SMTNL2 binds to coronin-1B through its N-terminal coiled-coil region and negates its function to stabilize the apical cortex. In sum, our results unveil a mechanism for regulating actin dynamics during epithelial morphogenesis, providing critical insights on the developmental control of the cellular cortex.
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Yin LM, Schnoor M, Jun CD. Structural Characteristics, Binding Partners and Related Diseases of the Calponin Homology (CH) Domain. Front Cell Dev Biol 2020; 8:342. [PMID: 32478077 PMCID: PMC7240100 DOI: 10.3389/fcell.2020.00342] [Citation(s) in RCA: 34] [Impact Index Per Article: 8.5] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/10/2020] [Accepted: 04/20/2020] [Indexed: 01/01/2023] Open
Abstract
The calponin homology (CH) domain is one of the most common modules in various actin-binding proteins and is characterized by an α-helical fold. The CH domain plays important regulatory roles in both cytoskeletal dynamics and signaling. The CH domain is required for stability and organization of the actin cytoskeleton, calcium mobilization and activation of downstream pathways. The CH domain has recently garnered increased attention due to its importance in the onset of different diseases, such as cancers and asthma. However, many roles of the CH domain in various protein functions and corresponding diseases are still unclear. Here, we review current knowledge about the structural features, interactome and related diseases of the CH domain.
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Affiliation(s)
- Lei-Miao Yin
- Laboratory of Molecular Biology, Shanghai Research Institute of Acupuncture and Meridian, Shanghai University of Traditional Chinese Medicine, Shanghai, China
| | - Michael Schnoor
- Molecular Biomedicine, Center for Investigation and Advanced Studies of the National Polytechnic Institute (Cinvestav), Mexico City, Mexico
| | - Chang-Duk Jun
- School of Life Sciences, Gwangju Institute of Science and Technology, Gwangju, South Korea
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8
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Smoothelin-like 1 deletion enhances myogenic reactivity of mesenteric arteries with alterations in PKC and myosin phosphatase signaling. Sci Rep 2019; 9:481. [PMID: 30679490 PMCID: PMC6346088 DOI: 10.1038/s41598-018-36564-0] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/06/2018] [Accepted: 11/23/2018] [Indexed: 11/18/2022] Open
Abstract
The role of the smoothelin-like 1 (SMTNL1) protein in mediating vascular smooth muscle contractile responses to intraluminal pressure was examined in resistance vessels. Mesenteric arterioles from wild type (WT) and SMTNL1 global knock-out (KO) mice were examined with pressure myography. SMTNL1 deletion was associated with enhanced myogenic tone in vessels isolated from male, but not female, mice. Intraluminal pressures greater than 40 mmHg generated statistically significant differences in myogenic reactivity between WT and KO vessels. No overt morphological differences were recorded for vessels dissected from KO animals, but SMTNL1 deletion was associated with loss of myosin phosphatase-targeting protein MYPT1 and increase in the myosin phosphatase inhibitor protein CPI-17. Additionally, we observed altered contractile responses of isolated arteries from SMTNL1 KO mice to phenylephrine, KCl-dependent membrane depolarization and phorbol 12,13-dibutyrate (PDBu). Using pharmacological approaches, myogenic responses of both WT and KO vessels were equally affected by Rho-associated kinase (ROCK) inhibition; however, augmented protein kinase C (PKC) signaling was found to contribute to the increased myogenic reactivity of SMTNL1 KO vessels across the 60–120 mmHg pressure range. Based on these findings, we conclude that deletion of SMTNL1 contributes to enhancement of pressure-induced contractility of mesenteric resistance vessels by influencing the activity of myosin phosphatase.
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Goudarzi M, Berg K, Pieper LM, Schier AF. Individual long non-coding RNAs have no overt functions in zebrafish embryogenesis, viability and fertility. eLife 2019; 8:40815. [PMID: 30620332 PMCID: PMC6347452 DOI: 10.7554/elife.40815] [Citation(s) in RCA: 52] [Impact Index Per Article: 10.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2018] [Accepted: 01/08/2019] [Indexed: 12/28/2022] Open
Abstract
Hundreds of long non-coding RNAs (lncRNAs) have been identified as potential regulators of gene expression, but their functions remain largely unknown. To study the role of lncRNAs during vertebrate development, we selected 25 zebrafish lncRNAs based on their conservation, expression profile or proximity to developmental regulators, and used CRISPR-Cas9 to generate 32 deletion alleles. We observed altered transcription of neighboring genes in some mutants, but none of the lncRNAs were required for embryogenesis, viability or fertility. Even RNAs with previously proposed non-coding functions (cyrano and squint) and other conserved lncRNAs (gas5 and lnc-setd1ba) were dispensable. In one case (lnc-phox2bb), absence of putative DNA regulatory-elements, but not of the lncRNA transcript itself, resulted in abnormal development. LncRNAs might have redundant, subtle, or context-dependent roles, but extrapolation from our results suggests that the majority of individual zebrafish lncRNAs have no overt roles in embryogenesis, viability and fertility.
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Affiliation(s)
- Mehdi Goudarzi
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, United States
| | - Kathryn Berg
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, United States
| | - Lindsey M Pieper
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, United States
| | - Alexander F Schier
- Department of Molecular and Cellular Biology, Harvard University, Cambridge, United States.,Center for Brain Science, Harvard University, Cambridge, United States.,FAS Center for Systems Biology, Harvard University, Cambridge, United States.,Allen Discovery Center for Cell Lineage Tracing, University of Washington, Seattle, United States.,Biozentrum, University of Basel, Basel, Switzerland
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10
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Sun X, Liu Z, Wu B, Zhou L, Wang Q, Wu W, Yang A. Differences between fast and slow muscles in scallops revealed through proteomics and transcriptomics. BMC Genomics 2018; 19:377. [PMID: 29783952 PMCID: PMC5963113 DOI: 10.1186/s12864-018-4770-2] [Citation(s) in RCA: 19] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/03/2017] [Accepted: 05/09/2018] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND Scallops possess striated and catch adductor muscles, which have different structure and contractile properties. The striated muscle contracts very quickly for swimming, whereas the smooth catch muscle can keep the shells closed for long periods with little expenditure of energy. In this study, we performed proteomic and transcriptomic analyses of differences between the striated (fast) and catch (slow) adductor muscles in Yesso scallop Patinopecten yessoensis. RESULTS Transcriptomic analysis reveals 1316 upregulated and 8239 downregulated genes in slow compared to fast adductor muscle. For the same comparison, iTRAQ-based proteomics reveals 474 differentially expressed proteins (DEPs), 198 up- and 276 downregulated. These DEPs mainly comprise muscle-specific proteins of the sarcoplasmic reticulum, extracellular matrix, and metabolic pathways. A group of conventional muscle proteins-myosin heavy chain, myosin regulatory light chain, myosin essential light chain, and troponin-are enriched in fast muscle. In contrast, paramyosin, twitchin, and catchin are preferentially expressed in slow muscle. The association analysis of proteomic and transcriptomic data provides the evidences of regulatory events at the transcriptional and posttranscriptional levels in fast and slow muscles. Among 1236 differentially expressed unigenes, 22.7% show a similar regulation of mRNA levels and protein abundances. In contrast, more unigenes (53.2%) exhibit striking differences between gene expression and protein abundances in the two muscles, which indicates the existence of fiber-type specific, posttranscriptional regulatory events in most of myofibrillar proteins, such as myosin heavy chain, titin, troponin, and twitchin. CONCLUSIONS This first, global view of protein and mRNA expression levels in scallop fast and slow muscles reveal that regulatory mechanisms at the transcriptional and posttranscriptional levels are essential in the maintenance of muscle structure and function. The existence of fiber-type specific, posttranscriptional regulatory mechanisms in myofibrillar proteins will greatly improve our understanding of the molecular basis of muscle contraction and its regulation in non-model invertebrates.
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Affiliation(s)
- Xiujun Sun
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China.,Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266200, People's Republic of China
| | - Zhihong Liu
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China.,Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266200, People's Republic of China
| | - Biao Wu
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China.,Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266200, People's Republic of China
| | - Liqing Zhou
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China.,Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266200, People's Republic of China
| | - Qi Wang
- College of Fisheries, Ocean University of China, Qingdao, 266003, China
| | - Wei Wu
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China.,Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266200, People's Republic of China
| | - Aiguo Yang
- Yellow Sea Fisheries Research Institute, Chinese Academy of Fishery Sciences, Qingdao, 266071, China. .,Function Laboratory for Marine Fisheries Science and Food Production Processes, Qingdao National Laboratory for Marine Science and Technology, Qingdao, 266200, People's Republic of China.
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Murali M, MacDonald JA. Smoothelins and the Control of Muscle Contractility. ADVANCES IN PHARMACOLOGY 2018; 81:39-78. [DOI: 10.1016/bs.apha.2017.10.001] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
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Kohl KD, Oakeson KF, Dunn D, Meyerholz DK, Dale C, Weiss RB, Dearing MD. Patterns of host gene expression associated with harboring a foregut microbial community. BMC Genomics 2017; 18:697. [PMID: 28874116 PMCID: PMC5585965 DOI: 10.1186/s12864-017-4101-z] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2017] [Accepted: 08/31/2017] [Indexed: 02/07/2023] Open
Abstract
BACKGROUND Harboring foregut microbial communities is considered a key innovation that allows herbivorous mammals to colonize new ecological niches. However, the functions of these chambers have only been well studied at the molecular level in ruminants. Here, we investigate gene expression in the foregut chamber of herbivorous rodents and ask whether these gene expression patterns are consistent with results in ruminants. We compared gene expression in foregut tissues of two rodent species: Stephen's woodrat (Neotoma stephensi), which harbors a dense foregut microbial community, and the lab rat (Rattus norvegicus), which lacks such a community. RESULTS We found that woodrats have higher abundances of transcripts associated with smooth muscle processes, specifically a higher expression of the smoothelin-like 1 gene, which may assist in contractile properties of this tissue to retain food material in the foregut chamber. The expression of genes associated with keratinization and cornification exhibited a complex pattern of differences between the two species, suggesting distinct molecular mechanisms. Lab rats exhibited higher abundances of transcripts associated with immune function, likely to inhibit microbial growth in the foregut of this species. CONCLUSIONS Some of our results were consistent with previous findings in ruminants (high expression of facilitative glucose transporters, lower expression of B4galnt2), suggestive of possible convergent evolution, while other results were unclear, and perhaps represent novel host-microbe interactions in rodents. Overall, our results suggest that harboring a foregut microbiota is associated with changes to the functions and host-microbe interactions of the foregut tissues.
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Affiliation(s)
- Kevin D Kohl
- Department of Biological Sciences, Vanderbilt University, 465 21st Ave South, Nashville, TN, 37235, USA.
| | - Kelly F Oakeson
- Department of Biology, University of Utah, 257 South 1400 East, Salt Lake City, UT, 84112, USA
| | - Diane Dunn
- Department of Human Genetics, University of Utah, 15 North 2030 East, Salt Lake City, 84112, USA
| | - David K Meyerholz
- Department of Pathology, University of Iowa, 200 Hawkins Dr, Iowa City, IA, 52242, USA
| | - Colin Dale
- Department of Biology, University of Utah, 257 South 1400 East, Salt Lake City, UT, 84112, USA
| | - Robert B Weiss
- Department of Human Genetics, University of Utah, 15 North 2030 East, Salt Lake City, 84112, USA
| | - M Denise Dearing
- Department of Biology, University of Utah, 257 South 1400 East, Salt Lake City, UT, 84112, USA
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Ulke-Lemée A, Sun DH, Ishida H, Vogel HJ, MacDonald JA. Binding of smoothelin-like 1 to tropomyosin and calmodulin is mutually exclusive and regulated by phosphorylation. BMC BIOCHEMISTRY 2017; 18:5. [PMID: 28320308 PMCID: PMC5359911 DOI: 10.1186/s12858-017-0080-6] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.4] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 10/19/2016] [Accepted: 03/15/2017] [Indexed: 12/11/2022]
Abstract
Background The smoothelin-like 1 protein (SMTNL1) can associate with tropomyosin (Tpm) and calmodulin (CaM), two proteins essential to the smooth muscle contractile process. SMTNL1 is phosphorylated at Ser301 by protein kinase A during calcium desensitization in smooth muscle, yet the effect of SMTNL1 phosphorylation on Tpm- and CaM-binding has yet to be investigated. Results Using pull down studies with Tpm-Sepharose and CaM-Sepharose, we examined the interplay between Tpm binding, CaM binding, phosphorylation of SMTNL1 and calcium concentration. Phosphorylation greatly enhanced the ability of SMTNL1 to associate with Tpm in vitro; surface plasmon resonance yielded a 10-fold enhancement in KD value with phosphorylation. The effect on CaM binding is more complex and varies with the availability of calcium. Conclusions Combining both CaM and Tpm with SMTNL1 shows that the binding to both is mutually exclusive. Electronic supplementary material The online version of this article (doi:10.1186/s12858-017-0080-6) contains supplementary material, which is available to authorized users.
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Affiliation(s)
- Annegret Ulke-Lemée
- Department of Biochemistry & Molecular Biology, University of Calgary, Cumming School of Medicine, 3280 Hospital Drive NW, Calgary, AB, T2N 4Z6, Canada
| | - David Hao Sun
- Department of Biochemistry & Molecular Biology, University of Calgary, Cumming School of Medicine, 3280 Hospital Drive NW, Calgary, AB, T2N 4Z6, Canada
| | - Hiroaki Ishida
- Biochemistry Research Group, Department of Biological Sciences, University of Calgary, 2500 University Drive NW, Calgary, AB, T2N 1 N4, Canada
| | - Hans J Vogel
- Biochemistry Research Group, Department of Biological Sciences, University of Calgary, 2500 University Drive NW, Calgary, AB, T2N 1 N4, Canada
| | - Justin A MacDonald
- Department of Biochemistry & Molecular Biology, University of Calgary, Cumming School of Medicine, 3280 Hospital Drive NW, Calgary, AB, T2N 4Z6, Canada.
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14
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Lartey J, Taggart J, Robson S, Taggart M. Altered Expression of Human Smooth Muscle Myosin Phosphatase Targeting (MYPT) Isovariants with Pregnancy and Labor. PLoS One 2016; 11:e0164352. [PMID: 27798640 PMCID: PMC5087845 DOI: 10.1371/journal.pone.0164352] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/13/2016] [Accepted: 09/23/2016] [Indexed: 11/18/2022] Open
Abstract
Background Myosin light-chain phosphatase is a trimeric protein that hydrolyses phosphorylated myosin II light chains (MYLII) to cause relaxation in smooth muscle cells including those of the uterus. A major component of the phosphatase is the myosin targeting subunit (MYPT), which directs a catalytic subunit to dephosphorylate MYLII. There are 5 main MYPT family members (MYPT1 (PPP1R12A), MYPT2 (PPP1R12B), MYPT3 (PPP1R16A), myosin binding subunit 85 MBS85 (PPP1R12C) and TIMAP (TGF-beta-inhibited membrane-associated protein (PPP1R16B)). Nitric oxide (NO)-mediated smooth muscle relaxation has in part been attributed to activation of the phosphatase by PKG binding to a leucine zipper (LZ) dimerization domain located at the carboxyl-terminus of PPP1R12A. In animal studies, alternative splicing of PPP1R12A can lead to the inclusion of a 31-nucleotide exonic segment that generates a LZ negative (LZ-) isovariant rendering the phosphatase less sensitive to NO vasodilators and alterations in PPP1R12ALZ- and LZ+ expression have been linked to phenotypic changes in smooth muscle function. Moreover, PPP1R12B and PPP1R12C, but not PPP1R16A or PPP1R16B, have the potential for LZ+/LZ- alternative splicing. Yet, by comparison to animal studies, the information on human MYPT genomic sequences/mRNA expressions is scant. As uterine smooth muscle undergoes substantial remodeling during pregnancy we were interested in establishing the patterns of expression of human MYPT isovariants during this process and also following labor onset as this could have important implications for determining successful pregnancy outcome. Objectives We used cross-species genome alignment, to infer putative human sequences not available in the public domain, and isovariant-specific quantitative PCR, to analyse the expression of mRNA encoding putative LZ+ and LZ- forms of PPP1R12A, PPP1R12B and PPP1R12C as well as canonical PPP1R16A and PPP1R16B genes in human uterine smooth muscle from non-pregnant, pregnant and in-labor donors. Results We found a reduction in the expression of PPP1R12A, PPP1R12BLZ+, PPP1R16A and PPP1R16B mRNA in late pregnancy (not-in-labor) relative to non-pregnancy. PPP1R12ALZ+ and PPP1R12ALZ- mRNA levels were similar in the non-pregnant and pregnant not in labor groups. There was a further reduction in the uterine expression of PPP1R12ALZ+, PPP1R12CLZ+ and PPP1R12ALZ- mRNA with labor relative to the pregnant not-in-labor group. PPP1R12A, PPP1R12BLZ+, PPP1R16A and PPP1R16B mRNA levels were invariant between the not in labor and in-labor groups. Conclusions MYPT proteins are crucial determinants of smooth muscle function. Therefore, these alterations in human uterine smooth muscle MYPT isovariant expression during pregnancy and labor may be part of the important molecular physiological transition between uterine quiescence and activation.
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Affiliation(s)
- Jon Lartey
- Institute of Cellular Medicine, William Leech Building, Medical School, Newcastle University, Framlington Place, Newcastle upon Tyne, United Kingdom, NE2 4HH
- * E-mail:
| | - Julie Taggart
- Institute of Genetic Medicine, Newcastle University, International Centre for Life, Central Parkway, Newcastle upon Tyne, United Kingdom, NE1 3BZ
| | - Stephen Robson
- Institute of Cellular Medicine, William Leech Building, Medical School, Newcastle University, Framlington Place, Newcastle upon Tyne, United Kingdom, NE2 4HH
| | - Michael Taggart
- Institute of Genetic Medicine, Newcastle University, International Centre for Life, Central Parkway, Newcastle upon Tyne, United Kingdom, NE1 3BZ
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Two domains of the smoothelin-like 1 protein bind apo- and calcium–calmodulin independently. BIOCHIMICA ET BIOPHYSICA ACTA-PROTEINS AND PROTEOMICS 2014; 1844:1580-90. [DOI: 10.1016/j.bbapap.2014.05.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/29/2014] [Revised: 05/14/2014] [Accepted: 05/24/2014] [Indexed: 12/24/2022]
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Turner SR, MacDonald JA. Novel Contributions of the Smoothelin-like 1 Protein in Vascular Smooth Muscle Contraction and its Potential Involvement in Myogenic Tone. Microcirculation 2014; 21:249-58. [DOI: 10.1111/micc.12108] [Citation(s) in RCA: 17] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/30/2013] [Accepted: 11/04/2013] [Indexed: 12/19/2022]
Affiliation(s)
- Sara R. Turner
- The Smooth Muscle Research Group at the Libin Cardiovascular Institute of Alberta; Department of Biochemistry & Molecular Biology; University of Calgary; Calgary Alberta Canada
| | - Justin A. MacDonald
- The Smooth Muscle Research Group at the Libin Cardiovascular Institute of Alberta; Department of Biochemistry & Molecular Biology; University of Calgary; Calgary Alberta Canada
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Grassie ME, Sutherland C, Ulke-Lemée A, Chappellaz M, Kiss E, Walsh MP, MacDonald JA. Cross-talk between Rho-associated kinase and cyclic nucleotide-dependent kinase signaling pathways in the regulation of smooth muscle myosin light chain phosphatase. J Biol Chem 2012; 287:36356-69. [PMID: 22948155 DOI: 10.1074/jbc.m112.398479] [Citation(s) in RCA: 38] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Ca(2+) sensitization of smooth muscle contraction depends upon the activities of protein kinases, including Rho-associated kinase, that phosphorylate the myosin phosphatase targeting subunit (MYPT1) at Thr(697) and/or Thr(855) (rat sequence numbering) to inhibit phosphatase activity and increase contractile force. Both Thr residues are preceded by the sequence RRS, and it has been suggested that phosphorylation at Ser(696) prevents phosphorylation at Thr(697). However, the effects of Ser(854) and dual Ser(696)-Thr(697) and Ser(854)-Thr(855) phosphorylations on myosin phosphatase activity and contraction are unknown. We characterized a suite of MYPT1 proteins and phosphospecific antibodies for specificity toward monophosphorylation events (Ser(696), Thr(697), Ser(854), and Thr(855)), Ser phosphorylation events (Ser(696)/Ser(854)) and dual Ser/Thr phosphorylation events (Ser(696)-Thr(697) and Ser(854)-Thr(855)). Dual phosphorylation at Ser(696)-Thr(697) and Ser(854)-Thr(855) by cyclic nucleotide-dependent protein kinases had no effect on myosin phosphatase activity, whereas phosphorylation at Thr(697) and Thr(855) by Rho-associated kinase inhibited phosphatase activity and prevented phosphorylation by cAMP-dependent protein kinase at the neighboring Ser residues. Forskolin induced phosphorylation at Ser(696), Thr(697), Ser(854), and Thr(855) in rat caudal artery, whereas U46619 induced Thr(697) and Thr(855) phosphorylation and prevented the Ser phosphorylation induced by forskolin. Furthermore, pretreatment with forskolin prevented U46619-induced Thr phosphorylations. We conclude that cross-talk between cyclic nucleotide and RhoA signaling pathways dictates the phosphorylation status of the Ser(696)-Thr(697) and Ser(854)-Thr(855) inhibitory regions of MYPT1 in situ, thereby regulating the activity of myosin phosphatase and contraction.
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Affiliation(s)
- Michael E Grassie
- Smooth Muscle Research Group and Libin Cardiovascular Institute of Alberta, University of Calgary, Calgary, Alberta T2N 4Z6, Canada
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Huang Y, Li W, Huang L, Hu Y, Chen W, Wang X, Sun J, Liang C, Wu Z, Li X, Xu J, Yu X. Identification and characterization of myophilin-like protein: a life stage and tissue-specific antigen of Clonorchis sinensis. Parasitol Res 2012; 111:1143-50. [PMID: 22752695 DOI: 10.1007/s00436-012-2946-2] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/01/2012] [Accepted: 04/23/2012] [Indexed: 12/24/2022]
Abstract
Clonorchiasis, caused by Clonorchis sinensis infection, has been an important public health problem in China. More messages about biology and pathogenicity of C. sinensis will be better for development of new strategies for clonorchiasis control. In the current study, using data from the published genomic and cDNA sequences for C. sinensis, we identify a gene encoding a myophilin-like protein (Cs myophilin-like). The cDNA sequence is 573 bp in length which encoded a protein of 190 amino acids. DNA sequence of Cs myophilin-like consists of four extrons and three introns. By mapping the draft genome of C. sinensis, single copy of myophilin-like gene is annotated. Bioinformatic analysis shows Cs myophilin-like comprises a calponin homology domain and three actin binding surfaces. It expresses at the life stage of adult worm and metacercaria but not in eggs. It intensively distributes in muscular locations such as oral sucker and pharynx of adult worm and sucker of metacercaria. The transcript level of Cs myophilin-like in oral sucker and pharynx is significantly higher than that in the rest of adult worm. Moreover, recombinant Cs myophilin-like is obtained and of antigenicity and immunoreactivity. It can be probed by sera from patients infected with trematode or cestode. Our data suggests that Cs myophilin-like may be involved in the host tissue invasion besides regulating the contraction of smooth muscle and movement of worm body. Taken together, the stable and soluble expression in Escherichia coli and immunogenicity of recombinant Cs myophilin-like proteins suggest that Cs myophilin-like may be a potential candidate for vaccine and drug target for clonorchiasis.
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Affiliation(s)
- Yan Huang
- Department of Parasitology, Zhongshan School of Medicine, Sun Yat-Sen University, Guangzhou, 510080, China
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MacDonald JA, Ishida H, Butler EI, Ulke-Lemée A, Chappellaz M, Tulk SE, Chik JK, Vogel HJ. Intrinsically disordered N-terminus of calponin homology-associated smooth muscle protein (CHASM) interacts with the calponin homology domain to enable tropomyosin binding. Biochemistry 2012; 51:2694-705. [PMID: 22424482 DOI: 10.1021/bi2019018] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/10/2023]
Abstract
The calponin homology-associated smooth muscle (CHASM) protein plays an important adaptive role in smooth and skeletal muscle contraction. CHASM is associated with increased muscle contractility and can be localized to the contractile thin filament via its binding interaction with tropomyosin. We sought to define the structural basis for the interaction of CHASM with smooth muscle tropomyosin as a first step to understanding the contribution of CHASM to the contractile capacity of smooth muscle. Herein, we provide a structure-based model for the tropomyosin-binding domain of CHASM using a combination of hydrogen/deuterium exchange mass spectrometry (HDX-MS) and NMR analyses. Our studies provide evidence that a portion of the N-terminal intrinsically disordered region forms intramolecular contacts with the globular C-terminal calponin homology (CH) domain. Ultimately, cooperativeness between these structurally dissimilar regions is required for CHASM binding to smooth muscle tropomyosin. Furthermore, it appears that the type-2 CH domain of CHASM is required for tropomyosin binding and presents a novel function for this protein domain.
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Affiliation(s)
- Justin A MacDonald
- Department of Biochemistry & Molecular Biology, University of Calgary, Calgary, Alberta, Canada T2N 4Z6.
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Ulke-Lemée A, Turner SR, Mughal SH, Borman MA, Winkfein RJ, MacDonald JA. Mapping and functional characterization of the murine smoothelin-like 1 promoter. BMC Mol Biol 2011; 12:10. [PMID: 21352594 PMCID: PMC3050715 DOI: 10.1186/1471-2199-12-10] [Citation(s) in RCA: 9] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/20/2010] [Accepted: 02/27/2011] [Indexed: 11/23/2022] Open
Abstract
Background Smoothelin-like 1 (SMTNL1, also known as CHASM) plays a role in promoting relaxation as well as adaptive responses to exercise, pregnancy and sexual development in smooth and skeletal muscle. Investigations of Smtnl1 transcriptional regulation are still lacking. Thus, in this study, we identify and characterize key regulatory elements of the mouse Smtnl1 gene. Results We mapped the key regulatory elements of the Smtnl1 promoter region: the transcriptional start site (TSS) lays -44 bp from the translational start codon and a TATA-box motif at -75 bp was conserved amongst all mammalian Smtnl1 promoters investigated. The Smtnl1 proximal promoter enhances expression up to 8-fold in smooth muscle cells and a second activating region lays 500 bp further upstream. Two repressing motifs were present (-118 to -218 bp and -1637 to -1869 bp). The proximal promoter is highly conserved in mammals and contains a mirror repeat sequence. In silico analysis suggests many transcription factors (notably MyoD) could potentially bind within the Smtnl1 proximal promoter sequence. Conclusion Smtnl1 transcript was identified in all smooth muscle tissues examined to date, albeit at much lower levels than found in skeletal muscle. It is unlikely that multiple SMTNL1 isoforms exist since a single Smtnl1 transcription start site was identified in both skeletal and intestinal smooth muscle. Promoter studies suggest restrictive control of Smtnl1 expression in non-muscle cells.
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Affiliation(s)
- Annegret Ulke-Lemée
- Smooth Muscle Research Group, Department of Biochemistry & Molecular Biology, University of Calgary, Alberta, Canada
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21
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Grassie ME, Moffat LD, Walsh MP, MacDonald JA. The myosin phosphatase targeting protein (MYPT) family: a regulated mechanism for achieving substrate specificity of the catalytic subunit of protein phosphatase type 1δ. Arch Biochem Biophys 2011; 510:147-59. [PMID: 21291858 DOI: 10.1016/j.abb.2011.01.018] [Citation(s) in RCA: 181] [Impact Index Per Article: 13.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/20/2010] [Revised: 01/22/2011] [Accepted: 01/26/2011] [Indexed: 12/23/2022]
Abstract
The mammalian MYPT family consists of the products of five genes, denoted MYPT1, MYPT2, MBS85, MYPT3 and TIMAP, which function as targeting and regulatory subunits to confer substrate specificity and subcellular localization on the catalytic subunit of type 1δ protein serine/threonine phosphatase (PP1cδ). Family members share several conserved domains, including an RVxF motif for PP1c binding and several ankyrin repeats that mediate protein-protein interactions. MYPT1, MYPT2 and MBS85 contain C-terminal leucine zipper domains involved in dimerization and protein-protein interaction, whereas MYPT3 and TIMAP are targeted to membranes via a C-terminal prenylation site. All family members are regulated by phosphorylation at multiple sites by various protein kinases; for example, Rho-associated kinase phosphorylates MYPT1, MYPT2 and MBS85, resulting in inhibition of phosphatase activity and Ca(2+) sensitization of smooth muscle contraction. A great deal is known about MYPT1, the myosin targeting subunit of myosin light chain phosphatase, in terms of its role in the regulation of smooth muscle contraction and, to a lesser extent, non-muscle motile processes. MYPT2 appears to be the key myosin targeting subunit of myosin light chain phosphatase in cardiac and skeletal muscles. MBS85 most closely resembles MYPT2, but little is known about its physiological function. Little is also known about the physiological role of MYPT3, although it is likely to target myosin light chain phosphatase to membranes and thereby achieve specificity for substrates involved in regulation of the actin cytoskeleton. MYPT3 is regulated by phosphorylation by cAMP-dependent protein kinase. TIMAP appears to target PP1cδ to the plasma membrane of endothelial cells where it serves to dephosphorylate proteins involved in regulation of the actin cytoskeleton and thereby control endothelial barrier function. With such a wide range of regulatory targets, MYPT family members have been implicated in diverse pathological events, including hypertension, Parkinson's disease and cancer.
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Affiliation(s)
- Michael E Grassie
- Smooth Muscle Research Group, Department of Biochemistry and Molecular Biology, University of Calgary, AB, Canada
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Huang TH, Ka SM, Hsu YJ, Shui HA, Tang BL, Hu KY, Chang JL, Chen A. Rab23 plays a role in the pathophysiology of mesangial cells--a proteomic analysis. Proteomics 2011; 11:380-94. [PMID: 21268268 DOI: 10.1002/pmic.201000165] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/11/2010] [Revised: 10/13/2010] [Accepted: 11/02/2010] [Indexed: 12/23/2022]
Abstract
Rab23, a novel member of the Rab family of small GTPases, has recently been identified in mesangial cells (MCs). Although Rab23 levels in MCs are associated with glomerular nephropathies, the exact physiological and pathological roles of Rab23 in MCs are unknown. In the present study, its roles in MCs were explored by performing proteomics and systems biology analyses in MCs after knockdown or overexpression of Rab23. Knockdown of Rab23 was achieved by transfecting MCs with a plasmid expressing short hairpin RNA against Rab23, while overexpression of Rab23 was accomplished by transfection with the wild-type, dominant negative, and constitutively active Rab23 gene constructs. The effects of different levels of Rab23 activity on proteome of various biological pathways were investigated. Gel-based proteomic approaches and systems biology tools, respectively, were used to identify the Rab23-regulated proteins and the functional pathways. Proteomic analysis revealed the potential roles for Rab23 in multiple processes, including G-protein signal transduction, transcription modulation, RNA stabilization, protein synthesis and degradation, cytoskeleton reorganization, anti-oxidation and detoxification, circadian rhythm regulation and phagocytosis. Bioinformatics analyses showed that Rab23 impacts on multiple biological networks in MCs. These data may shed light on the roles of Rab23 in mesangiopathy or MC damage.
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Affiliation(s)
- Tzu-Hao Huang
- Graduate Institute of Medical Sciences, National Defense Medical Center, Taipei, Taiwan
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Ulke-Lemée A, Ishida H, Borman MA, Valderrama A, Vogel HJ, MacDonald JA. Tropomyosin-binding properties of the CHASM protein are dependent upon its calponin homology domain. FEBS Lett 2010; 584:3311-6. [PMID: 20627103 DOI: 10.1016/j.febslet.2010.07.012] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/03/2010] [Revised: 07/06/2010] [Accepted: 07/06/2010] [Indexed: 10/19/2022]
Abstract
The calponin homology-associated smooth muscle protein (CHASM) can modulate muscle contractility, and its biological action may involve an interaction with the contractile filament. In this study, we demonstrate an interaction between CHASM and tropomyosin. Deletion constructs of CHASM were generated, and pull-down assays revealed a minimal deletion construct that could bind tropomyosin. Removal of the calponin homology (CH) domain or expression of the CH domain alone did not enable binding. The interaction was characterized by microcalorimetry with a dissociation constant of 2.0x10(-6) M. Confocal fluorescence microscopy also showed green fluorescent protein (GFP)-CHASM localization to filamentous structures within smooth muscle cells, and this targeting was dependent upon the CH domain.
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Affiliation(s)
- Annegret Ulke-Lemée
- Department of Biochemistry and Molecular Biology, University of Calgary, 3280 Hospital Drive NW, Calgary, Alberta, Canada T2N 4Z6
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Lontay B, Bodoor K, Weitzel DH, Loiselle D, Fortner C, Lengyel S, Zheng D, Devente J, Hickner R, Haystead TAJ. Smoothelin-like 1 protein regulates myosin phosphatase-targeting subunit 1 expression during sexual development and pregnancy. J Biol Chem 2010; 285:29357-66. [PMID: 20634291 DOI: 10.1074/jbc.m110.143966] [Citation(s) in RCA: 32] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/06/2023] Open
Abstract
Pregnancy coordinately alters the contractile properties of both vascular and uterine smooth muscles reducing systemic blood pressure and maintaining uterine relaxation. The precise molecular mechanisms underlying these pregnancy-induced adaptations have yet to be fully defined but are likely to involve changes in the expression of proteins regulating myosin phosphorylation. Here we show that smoothelin like protein 1 (SMTNL1) is a key factor governing sexual development and pregnancy induced adaptations in smooth and striated muscle. A primary target gene of SMTNL1 in these muscles is myosin phosphatase-targeting subunit 1 (MYPT1). Deletion of SMTNL1 increases expression of MYPT1 30-40-fold in neonates and during development expression of both SMTNL1 and MYPT1 increases over 20-fold. Pregnancy also regulates SMTNL1 and MYPT1 expression, and deletion SMTNL1 greatly exaggerates expression of MYPT1 in vascular smooth muscle, producing a profound reduction in force development in response to phenylephrine as well as sensitizing the muscle to acetylcholine. We also show that MYPT1 is expressed in Type2a muscle fibers in mice and humans and its expression is regulated during pregnancy, suggesting unrecognized roles in mediating skeletal muscle plasticity in both species. Our findings define a new conserved pathway in which sexual development and pregnancy mediate smooth and striated muscle adaptations through SMTNL1 and MYPT1.
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Affiliation(s)
- Beata Lontay
- Department of Pharmacology, Duke University Medical Center, Durham, North Carolina 27710, USA
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Genome expression profiling and network analysis of nitrite therapy during chronic ischemia: possible mechanisms and interesting molecules. Nitric Oxide 2009; 22:168-79. [PMID: 19963074 DOI: 10.1016/j.niox.2009.11.008] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2009] [Revised: 11/10/2009] [Accepted: 11/26/2009] [Indexed: 12/12/2022]
Abstract
Sodium nitrite is widely recognized to be a highly effective NO donor for the treatment of several ischemic tissue disorders. However, mechanisms by which nitrite confers cytoprotection during ischemic disorders remain largely unknown. In this study, we used genome expression profiling approaches to evaluate changes in gene expression in the hind-limb ischemia model using vehicle or sodium nitrite therapy. Sodium nitrite significantly restored ischemic tissue perfusion by day 3 post-ligation which returned to normal by day 7. Genesifter analysis of Affymetrix GeneChip data revealed a significant down-regulation of gene expression profiles at day 3, whereas gene expression profiles were predominantly up-regulated at day 7. Ingenuity network analysis of gene expression profiles at day 3 showed a strong decrease in gene expression from networks associated with immune functions such as acute inflammatory responses, antigen presentation, and humoral immune responses while networks containing increased gene expression profiles were associated with cardiovascular, skeletal, and muscle system development and function. Network analysis of day 7 gene array data revealed predominant up-regulation of genes associated with cell survival, tissue morphology, connective tissue function, skeletal and muscular system development, and lymphoid tissue structure and development. These data suggest that sodium nitrite elicits potent anti-inflammatory and pro-angiogenic gene responses at early time points which is later followed by up-regulation of genes associated with tissue repair and homeostasis.
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