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Hsieh TB, Jin JP. Evolution and function of calponin and transgelin. Front Cell Dev Biol 2023; 11:1206147. [PMID: 37363722 PMCID: PMC10285543 DOI: 10.3389/fcell.2023.1206147] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/15/2023] [Accepted: 05/25/2023] [Indexed: 06/28/2023] Open
Abstract
Calponin and transgelin (originally named SM22) are homologous cytoskeleton proteins that regulate actin-activated myosin motor functions in smooth muscle contraction and non-muscle cell motility during adhesion, migration, proliferation, phagocytosis, wound healing, and inflammatory responses. They are abundant cytoskeleton proteins present in multiple cell types whereas their physiological functions remain to be fully established. This focused review summarizes the evolution of genes encoding calponin and transgelin and their isoforms and discusses the structural similarity and divergence in vertebrate and invertebrate species in the context of functions in regulating cell motility. As the first literature review focusing on the evolution of the calponin-transgelin family of proteins in relevance to their structure-function relationship, the goal is to outline a foundation of current knowledge for continued investigations to understand the biological functions of calponin and transgelin in various cell types during physiological and pathological processes.
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Affiliation(s)
- Tzu-Bou Hsieh
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, MI, United States
| | - J.-P. Jin
- Department of Physiology and Biophysics, University of Illinois at Chicago College of Medicine, Chicago, IL, United States
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2
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Peng S, Fu Y. FYN: emerging biological roles and potential therapeutic targets in cancer. J Transl Med 2023; 21:84. [PMID: 36740671 PMCID: PMC9901160 DOI: 10.1186/s12967-023-03930-0] [Citation(s) in RCA: 16] [Impact Index Per Article: 16.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/04/2022] [Accepted: 01/25/2023] [Indexed: 02/07/2023] Open
Abstract
Src family protein kinases (SFKs) play a key role in cell adhesion, invasion, proliferation, survival, apoptosis, and angiogenesis during tumor development. In humans, SFKs consists of eight family members with similar structure and function. There is a high level of overexpression or hyperactivity of SFKs in tumor, and they play an important role in multiple signaling pathways involved in tumorigenesis. FYN is a member of the SFKs that regulate normal cellular processes. Additionally, FYN is highly expressed in many cancers and promotes cancer growth and metastasis through diverse biological functions such as cell growth, apoptosis, and motility migration, as well as the development of drug resistance in many tumors. Moreover, FYN is involved in the regulation of multiple cancer-related signaling pathways, including interactions with ERK, COX-2, STAT5, MET and AKT. FYN is therefore an attractive therapeutic target for various tumor types, and suppressing FYN can improve the prognosis and prolong the life of patients. The purpose of this review is to provide an overview of FYN's structure, expression, upstream regulators, downstream substrate molecules, and biological functions in tumors.
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Affiliation(s)
- SanFei Peng
- grid.412633.10000 0004 1799 0733Department of Gastrointestinal Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052 China
| | - Yang Fu
- Department of Gastrointestinal Surgery, The First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China.
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3
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Qian A, Hsieh TB, Hossain MM, Lin JJC, Jin JP. A rapid degradation of calponin 2 is required for cytokinesis. Am J Physiol Cell Physiol 2021; 321:C355-C368. [PMID: 34133238 DOI: 10.1152/ajpcell.00569.2020] [Citation(s) in RCA: 8] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/22/2022]
Abstract
Calponin 2 is an actin cytoskeleton-associated protein and plays a role in regulating cell motility-related functions such as phagocytosis, migration, and division. We previously reported that overexpression of calponin 2 inhibits the rate of cell proliferation. To investigate the underlying mechanism, our present study found that the levels of endogenous calponin 2 in NIH3T3 and HEK293 cells rapidly decreased before cell division characterized by an absence at the actin contractile ring. In cells lacking endogenous calponin 2, transfective expression of GFP-fusion calponin 2 inhibited cell proliferation similar to that of nonfusion calponin 2. Fluorescent imaging studies of mitotic cells indicated that a proper level of calponin 2 expression and effective degradation during cytokinesis are necessary for normal cell division. Computer-assisted dynamic image analysis of dividing cells revealed that overexpression of calponin 2 significantly affects motility and shape behaviors of cells only on the interval from the start of anaphase to the start of cytokinesis, i.e., the pre-cytokinesis phase, but not on the interval from the start of cytokinesis to 50% completion of cytokinesis. The pre-cytokinesis degradation of calponin 2 was attenuated by MG132 inhibition of the ubiquitin proteasome and inhibitor of protein kinase C (PKC), suggesting that PKC phosphorylation-triggered degradation of calponin 2 could determine the rate of cytokinesis. The novel role of calponin 2 in regulating the rate of cytokinesis may be targeted for therapeutic applications such as in an inhibition of malignant tumor growth.
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Affiliation(s)
- Airong Qian
- Department of Physiology, Wayne State University School of Medicine, Detroit, Michigan
| | - Tzu-Bou Hsieh
- Department of Obstetrics and Gynecology, Wayne State University School of Medicine, Detroit, Michigan
| | - M Moazzem Hossain
- Department of Physiology, Wayne State University School of Medicine, Detroit, Michigan
| | - Jim J-C Lin
- Department of Biological Sciences, University of Iowa, Iowa City, Iowa
| | - J-P Jin
- Department of Physiology, Wayne State University School of Medicine, Detroit, Michigan
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4
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Hirata H, Ku WC, Yip AK, Ursekar CP, Kawauchi K, Roy A, Guo AK, Vedula SRK, Harada I, Chiam KH, Ishihama Y, Lim CT, Sawada Y, Sokabe M. MEKK1-dependent phosphorylation of calponin-3 tunes cell contractility. J Cell Sci 2016; 129:3574-3582. [PMID: 27528401 DOI: 10.1242/jcs.189415] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/15/2016] [Accepted: 08/10/2016] [Indexed: 12/30/2022] Open
Abstract
MEKK1 (also known as MAP3K1), which plays a major role in MAPK signaling, has been implicated in mechanical processes in cells, such as migration. Here, we identify the actin-binding protein calponin-3 as a new MEKK1 substrate in the signaling that regulates actomyosin-based cellular contractility. MEKK1 colocalizes with calponin-3 at the actin cytoskeleton and phosphorylates it, leading to an increase in the cell-generated traction stress. MEKK1-mediated calponin-3 phosphorylation is attenuated by the inhibition of myosin II activity, the disruption of actin cytoskeletal integrity and adhesion to soft extracellular substrates, whereas it is enhanced upon cell stretching. Our results reveal the importance of the MEKK1-calponin-3 signaling pathway to cell contractility.
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Affiliation(s)
- Hiroaki Hirata
- Mechanobiology Institute, National University of Singapore, 117411 Singapore
| | - Wei-Chi Ku
- Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto 606-8501, Japan
| | - Ai Kia Yip
- A*STAR Bioinformatics Institute, 138671 Singapore
| | | | - Keiko Kawauchi
- Mechanobiology Institute, National University of Singapore, 117411 Singapore
| | - Amrita Roy
- Mechanobiology Institute, National University of Singapore, 117411 Singapore
| | - Alvin Kunyao Guo
- Mechanobiology Institute, National University of Singapore, 117411 Singapore
| | | | - Ichiro Harada
- Locomotive Syndrome Research Institute, Nadogaya Hospital, Kashiwa 277-0032, Japan Graduate School of Bioscience and Biotechnology, Tokyo Institute of Technology, Yokohama 226-8501, Japan
| | - Keng-Hwee Chiam
- Mechanobiology Institute, National University of Singapore, 117411 Singapore A*STAR Bioinformatics Institute, 138671 Singapore
| | - Yasushi Ishihama
- Graduate School of Pharmaceutical Sciences, Kyoto University, Kyoto 606-8501, Japan
| | - Chwee Teck Lim
- Mechanobiology Institute, National University of Singapore, 117411 Singapore Department of Biomedical Engineering, National University of Singapore, 117583 Singapore
| | - Yasuhiro Sawada
- Mechanobiology Institute, National University of Singapore, 117411 Singapore Locomotive Syndrome Research Institute, Nadogaya Hospital, Kashiwa 277-0032, Japan Department of Biological Sciences, National University of Singapore, 117543 Singapore
| | - Masahiro Sokabe
- Mechanobiology Institute, National University of Singapore, 117411 Singapore Mechanobiology Laboratory, Nagoya University Graduate School of Medicine, Nagoya 466-8550, Japan
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5
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Comparative secretome analysis of rat stomach under different nutritional status. J Proteomics 2015; 116:44-58. [PMID: 25579404 DOI: 10.1016/j.jprot.2015.01.001] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2014] [Revised: 12/23/2014] [Accepted: 01/01/2015] [Indexed: 01/09/2023]
Abstract
UNLABELLED Obesity is a major public health threat for many industrialised countries. Bariatric surgery is the most effective treatment against obesity, suggesting that gut derived signals are crucial for energy balance regulation. Several descriptive studies have proven the presence of gastric endogenous systems that modulate energy homeostasis; however, these systems and the interactions between them are still not well known. In the present study, we show for the first time the comparative 2-DE gastric secretome analysis under different nutritional status. We have identified 38 differently secreted proteins by comparing stomach secretomes from tissue explant cultures of rats under feeding, fasting and re-feeding conditions. Among the proteins identified, glyceraldehyde-3-phosphate dehydrogenase was found to be more abundant in gastric secretome and plasma after re-feeding, and downregulated in obesity. Additionally, two calponin-1 species were decreased in feeding state, and other were modulated by nutritional and metabolic conditions. These and other secreted proteins identified in this work may be considered as potential gastrokines implicated in food intake regulation. BIOLOGICAL SIGNIFICANCE The present work has an important impact in the field of obesity, especially in the regulation of body weight maintenance by the stomach. Nowadays, the most effective treatment in the fight against obesity is bariatric surgery, which suggests that stomach derived signals might be crucial for the regulation of the energy homeostasis. However, until now, the knowledge about the gastrokines and its mechanism of action has been poorly elucidated. In the present work, we had updated a previously validated explant secretion model for proteomic studies; this analysis allowed us, for the first time, to study the gastric secretome without interferences from other organs. We had identified 38 differently secreted proteins comparing ex vivo cultured stomachs from rats under feeding, fasting and re-feeding regimes. The results in the present article provide novel targets to study the role of the stomach in body weight and appetite regulation, and suggest new potential therapeutic targets for treating obesity.
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Ulmer B, Hagenlocher C, Schmalholz S, Kurz S, Schweickert A, Kohl A, Roth L, Sela-Donenfeld D, Blum M. Calponin 2 acts as an effector of noncanonical Wnt-mediated cell polarization during neural crest cell migration. Cell Rep 2013; 3:615-21. [PMID: 23499442 DOI: 10.1016/j.celrep.2013.02.015] [Citation(s) in RCA: 28] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/24/2012] [Revised: 01/17/2013] [Accepted: 02/11/2013] [Indexed: 12/19/2022] Open
Abstract
Neural crest cells (NCCs) migrate throughout the embryo to differentiate into cell types of all germ layers. Initial directed NCC emigration relies on planar cell polarity (PCP), which through the activity of the small GTPases RhoA and Rac governs the actin-driven formation of polarized cell protrusions. We found that the actin binding protein calponin 2 (Cnn2) was expressed in protrusions at the leading edge of migratory NCCs in chicks and frogs. Cnn2 knockdown resulted in NCC migration defects in frogs and chicks and randomized outgrowth of cell protrusions in NCC explants. Morphant cells showed central stress fibers at the expense of the peripheral actin network. Cnn2 acted downstream of Wnt/PCP, as migration defects induced by dominant-negative Wnt11 or inhibition of RhoA function were rescued by Cnn2 knockdown. These results suggest that Cnn2 modulates actin dynamics during NCC migration as an effector of noncanonical Wnt/PCP signaling.
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Affiliation(s)
- Bärbel Ulmer
- Institute of Zoology, University of Hohenheim, Garbenstrasse 30, 70593 Stuttgart, Germany
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7
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Shibukawa Y, Yamazaki N, Daimon E, Wada Y. Rock-dependent calponin 3 phosphorylation regulates myoblast fusion. Exp Cell Res 2013; 319:633-48. [PMID: 23276748 DOI: 10.1016/j.yexcr.2012.12.022] [Citation(s) in RCA: 31] [Impact Index Per Article: 2.8] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/01/2012] [Revised: 11/27/2012] [Accepted: 12/18/2012] [Indexed: 11/22/2022]
Abstract
Myogenesis occurs during embryonic development as well as regeneration following postnatal muscle fiber damage. Herein, we show that acidic calponin or calponin 3 (CNN3) regulates both myoblast cell fusion and muscle-specific gene expressions. Overexpression of CNN3 impaired C2C12 cell fusion, whereas CNN3 gene knockdown promoted skeletal myosin expression and fusion. CNN3 was phosphorylated at Ser293/296 in the C-terminal region. The basal inhibitory property of CNN3 against myoblast differentiation was enhanced by Ser293/296Ala mutation or deletion of the C-terminal region, and this inhibition was reversed by Ser293/296Asp mutation. Ser293/296 phosphorylation was required for CNN3 to bind actin and was dependent on Rho-associated kinases 1/2 (ROCK 1/2). Gene knockdown of ROCK1/2 suppressed CNN3 phosphorylation and impaired myoblast fusion, and these effects were partially attenuated by additional CNN3 overexpression of Ser293/296Asp CNN3. These findings indicated that CNN3 phosphorylation by ROCK blunts CNN3's inhibitory effects on muscle cell differentiation and fusion. In muscle tissues, satellite cells, but not mature myofibrils, expressed CNN3. CNN3 was also expressed and phosphorylated during myotube induction in isolated muscle satellite cells. Taken together, these results indicate that CNN3 is a downstream regulator of the ROCK signaling pathway for myogenesis.
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Affiliation(s)
- Yukinao Shibukawa
- Department of Molecular Medicine, Osaka Medical Center and Research Institute for Maternal and Child Health, 840 Murodo-cho, Izumi, Osaka 594-1101, Japan
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8
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Dobin SM, Malone VS, Lopez L, Donner LR. Unusual histologic variant of a low-grade fibromyxoid sarcoma in a 3-year-old boy with complex chromosomal translocations involving 7q34, 10q11.2, and 16p11.2 and rearrangement of the FUS gene. Pediatr Dev Pathol 2013; 16:86-90. [PMID: 23075075 DOI: 10.2350/12-07-1225-cr.1] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Indexed: 11/20/2022]
Abstract
Low-grade fibromyxoid sarcomas are rare, histologically deceptive, cytologically bland tumors that are infrequently encountered in pediatric patients. Our knowledge of histologic spectrum of these tumors is limited. A histologically unusual variant of a low-grade fibromyxoid sarcoma arising in a 3-year-old boy and containing islands of cohesive epithelioid cells is described. The diagnosis was, given the patient's age and the presence of epithelioid islands, very difficult and was verified by the presence of 3-way chromosomal translocations involving 7q34, 10q11.2, and 16p11.2 by rearrangement of the FUS gene and by immunoreactivity for mucin 4.
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Affiliation(s)
- Sheila M Dobin
- Department of Pathology, Scott and White Healthcare/The Texas A&M Health Science Center College of Medicine, Temple, TX, USA
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9
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Shibukawa Y, Yamazaki N, Kumasawa K, Daimon E, Tajiri M, Okada Y, Ikawa M, Wada Y. Calponin 3 regulates actin cytoskeleton rearrangement in trophoblastic cell fusion. Mol Biol Cell 2010; 21:3973-84. [PMID: 20861310 PMCID: PMC2982094 DOI: 10.1091/mbc.e10-03-0261] [Citation(s) in RCA: 64] [Impact Index Per Article: 4.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/29/2010] [Revised: 08/23/2010] [Accepted: 09/15/2010] [Indexed: 12/23/2022] Open
Abstract
Cell-cell fusion is an intriguing differentiation process, essential for placental development and maturation. A proteomic approach identified a cytoplasmic protein, calponin 3 (CNN3), related to the fusion of BeWo choriocarcinoma cells. CNN3 was expressed in cytotrophoblasts in human placenta. CNN3 gene knockdown promoted actin cytoskeletal rearrangement and syncytium formation in BeWo cells, suggesting CNN3 to be a negative regulator of trophoblast fusion. Indeed, CNN3 depletion promoted BeWo cell fusion. CNN3 at the cytoplasmic face of cytoskeleton was dislocated from F-actin with forskolin treatment and diffused into the cytoplasm in a phosphorylation-dependent manner. Phosphorylation sites were located at Ser293/296 in the C-terminal region, and deletion of this region or site-specific disruption of Ser293/296 suppressed syncytium formation. These CNN3 mutants were colocalized with F-actin and remained there after forskolin treatment, suggesting that dissociation of CNN3 from F-actin is modulated by the phosphorylation status of the C-terminal region unique to CNN3 in the CNN family proteins. The mutant missing these phosphorylation sites displayed a dominant negative effect on cell fusion, while replacement of Ser293/296 with aspartic acid enhanced syncytium formation. These results indicated that CNN3 regulates actin cytoskeleton rearrangement which is required for the plasma membranes of trophoblasts to become fusion competent.
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Affiliation(s)
- Yukinao Shibukawa
- *Department of Molecular Medicine, Osaka Medical Center and Research Institute for Maternal and Child Health, 840 Murodo-cho, Izumi, Osaka 594-1101, Japan
| | - Natsuko Yamazaki
- *Department of Molecular Medicine, Osaka Medical Center and Research Institute for Maternal and Child Health, 840 Murodo-cho, Izumi, Osaka 594-1101, Japan
| | - Keiichi Kumasawa
- Research Institute for Microbial Diseases and Graduate School of Pharmaceutical Sciences, Osaka University, 3-1 Yamada-oka, Suita, Osaka 565-0871, Japan; and
| | - Etsuko Daimon
- *Department of Molecular Medicine, Osaka Medical Center and Research Institute for Maternal and Child Health, 840 Murodo-cho, Izumi, Osaka 594-1101, Japan
| | - Michiko Tajiri
- *Department of Molecular Medicine, Osaka Medical Center and Research Institute for Maternal and Child Health, 840 Murodo-cho, Izumi, Osaka 594-1101, Japan
- CREST, Japan Science and Technology Agency, 4-1-8 Honcho Kawaguchi, Saitama 332-0012, Japan
| | - Yuka Okada
- Research Institute for Microbial Diseases and Graduate School of Pharmaceutical Sciences, Osaka University, 3-1 Yamada-oka, Suita, Osaka 565-0871, Japan; and
| | - Masahito Ikawa
- Research Institute for Microbial Diseases and Graduate School of Pharmaceutical Sciences, Osaka University, 3-1 Yamada-oka, Suita, Osaka 565-0871, Japan; and
| | - Yoshinao Wada
- *Department of Molecular Medicine, Osaka Medical Center and Research Institute for Maternal and Child Health, 840 Murodo-cho, Izumi, Osaka 594-1101, Japan
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Ferjani I, Fattoum A, Manai M, Benyamin Y, Roustan C, Maciver SK. Two distinct regions of calponin share common binding sites on actin resulting in different modes of calponin-actin interaction. BIOCHIMICA ET BIOPHYSICA ACTA 2010; 1804:1760-7. [PMID: 20595006 DOI: 10.1016/j.bbapap.2010.05.012] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.3] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 12/03/2009] [Revised: 05/05/2010] [Accepted: 05/25/2010] [Indexed: 10/19/2022]
Abstract
Calponins are a small family of proteins that alter the interaction between actin and myosin II and mediate signal transduction. These proteins bind F-actin in a complex manner that depends on a variety of parameters such as stoichiometry and ionic strength. Calponin binds G-actin and F-actin, bundling the latter primarily through two distinct and adjacent binding sites (ABS1 and ABS2). Calponin binds other proteins that bind F-actin and considerable disagreements exist as to how calponin is located on the filament, especially in the presence of other proteins. A study (Galkin, V.E., Orlova, A., Fattoum, A., Walsh, M.P. and Egelman, E.H. (2006) J. Mol. Biol. 359, 478-485.), using EM single-particle reconstruction has shown that there may be four modes of interaction, but how these occur is not yet known. We report that two distinct regions of calponin are capable of binding some of the same sites on actin (such as 18-28 and 360-372 in subdomain 1). This accounts for the finding that calponin binds the filament with different apparent geometries. We suggest that the four modes of filament binding account for differences in stoichiometry and that these, in turn, arise from differential binding of the two calponin regions to actin. It is likely that the modes of binding are reciprocally influenced by other actin-binding proteins since members of the alpha-actinin group also adopt different actin-binding positions and bind actin principally through a domain that is similar to calponin's ABS1.
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Affiliation(s)
- Imen Ferjani
- UMR 5539 (CNRS) Laboratoire de motilité cellulaire (Ecole Pratique des Hautes Etudes) Université de Montpellier 2, Place E. Bataillon, CC107, 34095 Montpellier Cedex 5, France
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11
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Amanchy R, Zhong J, Molina H, Chaerkady R, Iwahori A, Kalume DE, Grønborg M, Joore J, Cope L, Pandey A. Identification of c-Src tyrosine kinase substrates using mass spectrometry and peptide microarrays. J Proteome Res 2008; 7:3900-10. [PMID: 18698806 PMCID: PMC2646669 DOI: 10.1021/pr800198w] [Citation(s) in RCA: 51] [Impact Index Per Article: 3.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/02/2023]
Abstract
c-Src tyrosine kinase plays a critical role in signal transduction downstream of growth factor receptors, integrins and G protein-coupled receptors. We used stable isotope labeling with amino acids in cell culture (SILAC) approach to identify additional substrates of c-Src tyrosine kinase in human embryonic kidney 293T cells. We have identified 10 known substrates and interactors of c-Src and Src family kinases along with 26 novel substrates. We have experimentally validated 4 of the novel proteins (NICE-4, RNA binding motif 10, FUSE-binding protein 1 and TRK-fused gene) as direct substrates of c-Src using in vitro kinase assays and cotransfection experiments. Significantly, using a c-Src specific inhibitor, we were also able to implicate 3 novel substrates (RNA binding motif 10, EWS1 and Bcl-2 associated transcription factor) in PDGF signaling. Finally, to identify the exact tyrosine residues that are phosphorylated by c-Src on the novel c-Src substrates, we designed custom peptide microarrays containing all possible tyrosine-containing peptides (312 unique peptides) and their mutant counterparts containing a Tyr --> Phe substitution from 14 of the identified substrates. Using this platform, we identified 34 peptides that are phosphorylated by c-Src. We have demonstrated that SILAC-based quantitative proteomics approach is suitable for identification of substrates of nonreceptor tyrosine kinases and can be coupled with peptide microarrays for high-throughput identification of substrate phosphopeptides.
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Affiliation(s)
- Ramars Amanchy
- McKusick-Nathans Institute of Genetic Medicine and the Departments of Biological Chemistry, Pathology and Oncology, Johns Hopkins University, Baltimore, Maryland 21205, USA
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12
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Kolev TM, Koleva BB, Spiteller M, Sheldrick WS, Mayer-Figge H. Synthesis, spectroscopic and structural elucidation of sympathomimetic amine, tyraminium dihydrogenphosphate. Amino Acids 2008; 36:185-93. [DOI: 10.1007/s00726-008-0046-5] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/01/2007] [Accepted: 02/11/2008] [Indexed: 11/29/2022]
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13
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Takeda H, Fukumoto A, Miura A, Goshima N, Nomura N. High-throughput kinase assay based on surface plasmon resonance suitable for native protein substrates. Anal Biochem 2006; 357:262-71. [PMID: 16920059 DOI: 10.1016/j.ab.2006.07.002] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2006] [Revised: 07/03/2006] [Accepted: 07/06/2006] [Indexed: 10/24/2022]
Abstract
We report a novel in vitro high-throughput (HTP) kinase assay using surface plasmon resonance (SPR). In vitro tyrosine phosphorylation was performed in a microtiter plate, after which the substrate was captured with an antibody on a sensor chip and phosphotyrosine (pTyr) was detected with an anti-pTyr antibody. The capture and pTyr detection steps were performed using a Biacore A100, which is a sensitive and high-performance flow-cell-based SPR biosensor. This system allowed multiple sample processing (1000 samples/day) and high-quality data sampling. We compared the abilities of the HTP-SPR method and a standard radioisotope assay by measuring the phosphorylation of several substrate proteins by the Fyn tyrosine kinase. Similar results were obtained with both methods, suggesting that the HTP-SPR method is reliable. Therefore, the HTP-SPR method described in this study can be a powerful tool for a variety of screening analyses, such as kinase activity screening, kinase substrate profiling, and kinase HTP screening of kinase inhibitors.
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Affiliation(s)
- Hiroyuki Takeda
- Protein Expression Team, Japan Biological Information Research Center, Japan Biological Informatics Consortium, Tokyo 135-0064, Japan
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14
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Ferjani I, Fattoum A, Maciver S, Bénistant C, Chahinian A, Manai M, Benyamin Y, Roustan C. A direct interaction with calponin inhibits the actin-nucleating activity of gelsolin. Biochem J 2006; 396:461-8. [PMID: 16536729 PMCID: PMC1482823 DOI: 10.1042/bj20051690] [Citation(s) in RCA: 13] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/19/2005] [Revised: 03/02/2006] [Accepted: 03/15/2006] [Indexed: 12/26/2022]
Abstract
Gelsolin and calponin are well-characterized cytoskeletal proteins that are abundant and widely expressed in vertebrate tissues. It is also becoming apparent, however, that they are involved in cell signalling. In the present study, we show that gelsolin and calponin interact directly to form a high-affinity (K(d)=16 nM) 1:1 complex, by the use of fluorescent probes attached to both proteins, by affinity chromatography and by immunoprecipitation. These methods show that gelsolin can form high-affinity complexes with two calponin isoforms (basic h1 and acidic h3). They also show that gelsolin binds calponin through regions that have been identified previously as being calponin's actin-binding sites. Moreover, gelsolin does not interact with calponin while calponin is bound to F-actin. Reciprocal experiments to find calponin-binding sites on gelsolin show that these are in both the N- and C-terminal halves of gelsolin. Calponin has minimal effects on actin severing by gelsolin. In contrast, calponin markedly affects the nucleation activity of gelsolin. The maximum inhibition of nucleation by gelsolin was 50%, which was achieved with a ratio of two calponins for every gelsolin. Thus the interaction of calponin with gelsolin may play a regulatory role in the formation of actin filaments through modulation of gelsolin's actin-binding function and through the prevention of calponin's actin-binding activities.
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Affiliation(s)
- Imen Ferjani
- *UMR 5539 (CNRS) Laboratoire de Motilité Cellulaire (Ecole Pratique des Hautes Etudes), Université de Montpellier 2, Place E. Bataillon, CC107, 34095 Montpellier Cedex 5, France
- †Unité de Biochimie et Biololgie Moléculaire, Faculté des Sciences de Tunis, Campus Universitaire 2092 El Manar, Tunis, Tunisia
| | - Abdellatif Fattoum
- ‡School of Biomedical and Clinical Laboratory Sciences, Division of Biomedical Sciences, College of Medicine, University of Edinburgh, Hugh Robson Building, George Square, Edinburgh EH8 9XD, Scotland
| | - Sutherland K. Maciver
- §Centre de Recherches de Biochimie Macromoléculaire, FRE 2593 (CNRS), 1919 rte de Mende, 34293 Montpellier Cedex 5, France
| | - Christine Bénistant
- ‡School of Biomedical and Clinical Laboratory Sciences, Division of Biomedical Sciences, College of Medicine, University of Edinburgh, Hugh Robson Building, George Square, Edinburgh EH8 9XD, Scotland
| | - Anne Chahinian
- *UMR 5539 (CNRS) Laboratoire de Motilité Cellulaire (Ecole Pratique des Hautes Etudes), Université de Montpellier 2, Place E. Bataillon, CC107, 34095 Montpellier Cedex 5, France
| | - Mohamed Manai
- †Unité de Biochimie et Biololgie Moléculaire, Faculté des Sciences de Tunis, Campus Universitaire 2092 El Manar, Tunis, Tunisia
| | - Yves Benyamin
- *UMR 5539 (CNRS) Laboratoire de Motilité Cellulaire (Ecole Pratique des Hautes Etudes), Université de Montpellier 2, Place E. Bataillon, CC107, 34095 Montpellier Cedex 5, France
| | - Claude Roustan
- *UMR 5539 (CNRS) Laboratoire de Motilité Cellulaire (Ecole Pratique des Hautes Etudes), Université de Montpellier 2, Place E. Bataillon, CC107, 34095 Montpellier Cedex 5, France
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Krawitz DC, Forrest W, Moreno GT, Kittleson J, Champion KM. Proteomic studies support the use of multi-product immunoassays to monitor host cell protein impurities. Proteomics 2006; 6:94-110. [PMID: 16302279 DOI: 10.1002/pmic.200500225] [Citation(s) in RCA: 66] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
In the biopharmaceutical industry, recombinant protein drugs are commonly produced in Chinese hamster ovary (CHO) cells. During the development process, removal of CHO cell-derived proteins from the biopharmaceutical product is monitored using multi-product immunoassays. Such immunoassays are developed by raising antibodies to a single CHO cell protein preparation. However, these assays are utilized to monitor CHO cell protein impurities during the recovery of products from different CHO cell lines. To address whether underlying differences between CHO cell lines result in sufficient protein expression changes to exclude the suitability of multi-product immunoassays, a comparative proteomics study of three independently generated CHO cell lines was performed. Statistical analysis of over 1000 proteins resolved by 2-D PAGE demonstrated that the protein expression profiles of three different CHO cell lines exhibit very few differences in protein expression. Only 11 qualitative changes in protein expression and 26 quantitative changes greater than two-fold were observed. Identification of protein spots by mass spectrometry revealed that many of the observed changes were due to post-translational modifications rather than expression of novel proteins in each cell line. These results suggest that multi-product immunoassays are suitable for monitoring host cell proteins in biopharmaceuticals produced in different CHO cell lines.
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Affiliation(s)
- Denise C Krawitz
- Department of Early-Stage Analytical Development, Genentech Inc., MS #62, 1 DNA Way, South San Francisco, CA 94080, USA.
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Rami G, Caillard O, Medina I, Pellegrino C, Fattoum A, Ben-Ari Y, Ferhat L. Change in the shape and density of dendritic spines caused by overexpression of acidic calponin in cultured hippocampal neurons. Hippocampus 2006; 16:183-97. [PMID: 16358313 DOI: 10.1002/hipo.20145] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/17/2022]
Abstract
Dendritic spines are morphing structures believed to provide a cellular substrate for synaptic plasticity. It has been suggested that the actin cytoskeleton is the target of molecular mechanisms regulating spine morphology. Here we hypothesized that acidic calponin, an actin-binding protein, is one of the key regulators of actin filaments during spine plasticity. Our data showed that the overexpression of acidic calponin-GFP (green fluorescent protein) in primary cultures of rat hippocampal neurons causes an elongation of spines and an increase of their density as compared with those of GFP-expressing neurons. These effects required the actin-binding domains of acidic calponin. The close apposition of the presynatic marker synaptophysin to these long spines and the presence of specific postsynaptic markers actin, PSD-95, NR1, and GluR1 suggested the existence of functional excitatory synaptic contacts. Indeed, electrophysiological data showed that the postsynaptic overexpression of acidic calponin enhanced the frequency of miniature excitatory postsynaptic currents as compared with that of GFP-expressing neurons, but did not affect their properties such as amplitude, rise time, and half width. Studies in heterologous cells revealed that acidic calponin reorganized the actin filaments and stabilized them. Taken together, these findings show that acidic calponin regulates dendritic spine morphology and density, likely via regulation of the actin cytoskeleton reorganization and dynamic. Furthermore, the acidic calponin-induced spines are able to establish functional glutamatergic synapses. Such data suggest that acidic calponin is a key factor in the regulation of spine plasticity and synaptic activity.
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Affiliation(s)
- Guillaume Rami
- INMED/INSERM U29, 163 rue de Luminy, BP 13, 13273, Marseille Cedex 09, France
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