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Gupta MN, Uversky VN. Reexamining the diverse functions of arginine in biochemistry. Biochem Biophys Res Commun 2024; 705:149731. [PMID: 38432110 DOI: 10.1016/j.bbrc.2024.149731] [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: 12/24/2023] [Revised: 02/22/2024] [Accepted: 02/26/2024] [Indexed: 03/05/2024]
Abstract
Arginine in a free-state and as part of peptides and proteins shows distinct tendency to form clusters. In free-form, it has been found useful in cryoprotection, as a drug excipient for both solid and liquid formulations, as an aggregation suppressor, and an eluent in protein chromatography. In many cases, the mechanisms by which arginine acts in all these applications is either debatable or at least continues to attract interest. It is quite possible that arginine clusters may be involved in many such applications. Furthermore, it is possible that such clusters are likely to behave as intrinsically disordered polypeptides. These considerations may help in understanding the roles of arginine in diverse applications and may even lead to better strategies for using arginine in different situations.
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Affiliation(s)
- Munishwar Nath Gupta
- Department of Biochemical Engineering and Biotechnology, Indian Institute of Technology, Hauz Khas, New Delhi, 110016, India.
| | - Vladimir N Uversky
- Pushchino Scientific Center for Biological Research of the Russian Academy of Sciences, Institute for Biological Instrumentation, Institutskaya Str., 7, Pushchino, Moscow Region, 142290, Russia; Department of Molecular Medicine and USF Health Byrd Alzheimer's Research Institute, Morsani College of Medicine, University of South Florida, Tampa, FL, 33612, USA.
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2
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Muranova LK, Vostrikova VM, Shatov VM, Sluchanko NN, Gusev NB. Interaction of the C-terminal immunoglobulin-like domains (Ig 22-24) of filamin C with human small heat shock proteins. Biochimie 2024; 219:146-154. [PMID: 38016530 DOI: 10.1016/j.biochi.2023.11.010] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/10/2023] [Revised: 11/18/2023] [Accepted: 11/22/2023] [Indexed: 11/30/2023]
Abstract
Small heat shock proteins are the well-known regulators of the cytoskeleton integrity, yet their complexes with actin-binding proteins are underexplored. Filamin C, a dimeric 560 kDa protein, abundant in cardiac and skeletal muscles, crosslinks actin filaments and contributes to Z-disc formation and membrane-cytoskeleton attachment. Here, we analyzed the interaction of a human filamin C fragment containing immunoglobulin-like domains 22-24 (FLNC22-24) with five small heat shock proteins (HspB1, HspB5, HspB6, HspB7, HspB8) and their α-crystallin domains. On size-exclusion chromatography, only HspB7 or its α-crystallin domain formed complexes with FLNC22-24. Despite similar isoelectric points of the small heat shock proteins analyzed, only HspB7 and its α-crystallin domain interacted with FLNC22-24 on native gel electrophoresis. Crosslinking with glutaraldehyde confirmed the formation of complexes between HspB7 (or its α-crystallin domain) and the filamin С fragment, inhibiting intersubunit FLNC crosslinking. These data are consistent with the structure modeling using Alphafold. Thus, the C-terminal fragment (immunoglobulin-like domains 22-24) of filamin C contains the site for HspB7 (or its α-crystallin domain) interaction, which competes with FLNC22-24 dimerization and its probable interaction with different target proteins.
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Affiliation(s)
- Lydia K Muranova
- Department of Biochemistry, School of Biology, Moscow State University, Moscow 119234, Russia
| | - Varvara M Vostrikova
- Department of Biochemistry, School of Biology, Moscow State University, Moscow 119234, Russia
| | - Vladislav M Shatov
- Department of Biochemistry, School of Biology, Moscow State University, Moscow 119234, Russia
| | - Nikolai N Sluchanko
- A.N. Bach Institute of Biochemistry, Federal Research Center "Fundamentals of Biotechnology", Russian Academy of Sciences, Moscow 119071, Russia
| | - Nikolai B Gusev
- Department of Biochemistry, School of Biology, Moscow State University, Moscow 119234, Russia.
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Feng Y, Huang Z, Lu F, Song L, Liu R, Zhang Y, Li N, Han X, Li X, Li K, Huang B, Xie G, Guo A, Yang J, Jia Z. 8-Br-cGMP activates HSPB6 and increases the antineoplastic activity of quinidine in prostate cancer. Cell Death Discov 2024; 10:90. [PMID: 38374143 PMCID: PMC10876707 DOI: 10.1038/s41420-024-01853-3] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/23/2023] [Revised: 01/31/2024] [Accepted: 02/06/2024] [Indexed: 02/21/2024] Open
Abstract
Heat shock protein family B [small] member 6 (HSPB6), widely found in various muscles, has been recently identified as a tumor suppressor gene. However, its role in prostate cancer remains unexplored. Herein, we investigated the expression of HSPB6 in prostate cancer and its association with prognosis. Our findings revealed that HSPB6 downregulation in prostate cancer correlated with a poor prognosis. Moreover, we discovered that HSPB6 can be phosphorylated and activated by 8-Br-cGMP, leading to apoptosis in prostate cancer cells by activating Cofilin. Additionally, we demonstrated that knocking down E2F1 by quinidine administration enhances the transcriptional level of HSPB6. Furthermore, we evaluated the combination of quinidine and 8-Br-cGMP as a potential therapeutic strategy for prostate cancer. Our results revealed that the combined treatment was more effective than either treatment alone in inhibiting the growth of prostate cancer through the HSPB6 pathway, both in vitro and in vivo. Overall, our study provides compelling evidence that HSPB6 suppresses malignant behavior in prostate cancer by inducing apoptosis. The combination of quinidine and 8-Br-cGMP emerges as a promising approach for the treatment of prostate cancer.
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Affiliation(s)
- Yuankang Feng
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Zhenlin Huang
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Fubo Lu
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Liang Song
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Ruoyang Liu
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Yu Zhang
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Ningyang Li
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Xu Han
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Xiang Li
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Keqiang Li
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Budeng Huang
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Guoqing Xie
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Abao Guo
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China
| | - Jinjian Yang
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China.
| | - Zhankui Jia
- Department of Urology, the First Affiliated Hospital of Zhengzhou University, Zhengzhou, 450052, China.
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Wang C, Teng L, Liu ZS, Kamalova A, McMenimen KA. HspB5 Chaperone Structure and Activity Are Modulated by Chemical-Scale Interactions in the ACD Dimer Interface. Int J Mol Sci 2023; 25:471. [PMID: 38203641 PMCID: PMC10778692 DOI: 10.3390/ijms25010471] [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: 11/20/2023] [Revised: 12/24/2023] [Accepted: 12/27/2023] [Indexed: 01/12/2024] Open
Abstract
Small heat shock proteins (sHsps) are a family of ATP-independent molecular chaperones that function as "holdases" and prevent protein aggregation due to changes in temperature, pH, or oxidation state. sHsps have a conserved α-crystallin domain (ACD), which forms the dimer building block, flanked by variable N- and C-terminal regions. sHsps populate various oligomeric states as a function of their sequestrase activity, and these dynamic structural features allow the proteins to interact with a plethora of cellular substrates. However, the molecular mechanisms of their dynamic conformational assembly and the interactions with various substrates remains unclear. Therefore, it is important to gain insight into the underlying physicochemical properties that influence sHsp structure in an effort to understand their mechanism(s) of action. We evaluated several disease-relevant mutations, D109A, F113Y, R116C, R120G, and R120C, in the ACD of HspB5 for changes to in vitro chaperone activity relative to that of wildtype. Structural characteristics were also evaluated by ANS fluorescence and CD spectroscopy. Our results indicated that mutation Y113F is an efficient holdase, while D109A and R120G, which are found in patients with myofibrillar myopathy and cataracts, respectively, exhibit a large reduction in holdase activity in a chaperone-like light-scattering assay, which indicated alterations in substrate-sHsp interactions. The extent of the reductions in chaperone activities are different among the mutants and specific to the substrate protein, suggesting that while sHsps are able to interact with many substrates, specific interactions provide selectivity for some substrates compared to others. This work is consistent with a model for chaperone activity where key electrostatic interactions in the sHsp dimer provide structural stability and influence both higher-order sHsp interactions and facilitate interactions with substrate proteins that define chaperone holdase activity.
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Affiliation(s)
- Chenwei Wang
- Program in Biochemistry, Mount Holyoke College, South Hadley, MA 01075, USA; (C.W.); (L.T.); (Z.S.L.)
| | - Lilong Teng
- Program in Biochemistry, Mount Holyoke College, South Hadley, MA 01075, USA; (C.W.); (L.T.); (Z.S.L.)
| | - Zhiyan Silvia Liu
- Program in Biochemistry, Mount Holyoke College, South Hadley, MA 01075, USA; (C.W.); (L.T.); (Z.S.L.)
| | - Aichurok Kamalova
- Program in Neuroscience and Behavior, Mount Holyoke College, South Hadley, MA 01075, USA;
| | - Kathryn A. McMenimen
- Program in Biochemistry, Mount Holyoke College, South Hadley, MA 01075, USA; (C.W.); (L.T.); (Z.S.L.)
- Program in Neuroscience and Behavior, Mount Holyoke College, South Hadley, MA 01075, USA;
- Department of Chemistry, Mount Holyoke College, South Hadley, MA 01075, USA
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Jamgochian HH, Zamakhaev MV, Sluchanko NN, Goncharenko AV, Shumkov MS. Development of Heterologous Expression System and Optimization of the Method of Cholera Toxin β-Subunit Production in E. coli. BIOCHEMISTRY. BIOKHIMIIA 2023; 88:1304-1317. [PMID: 37770397 DOI: 10.1134/s0006297923090109] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 05/18/2023] [Revised: 08/14/2023] [Accepted: 08/15/2023] [Indexed: 09/30/2023]
Abstract
Cholera is a deadly infection disease, which is usually associated with low hygiene levels and limited access to high-quality drinking water. An effective way to prevent cholera is the use of vaccines. Among active vaccine components there is the CtxB protein (cholera toxin β-subunit). In the current work, we have developed a genetic system for production of the recombinant CtxB in E. coli cells and studied conditions for synthesis and purification of the target product at the laboratory scale. It has been found that the optimal algorithm for isolation of the recombinant protein is to grow E. coli culture in the synthetic M9 medium with glycerol, followed by CtxB purification out of the spent culture medium using Ni2+-chelate affinity chromatography techniques. Forty-eight hours after induction of CtxB expression, concentration of the target product could be up to 50 mg/liter in the culture medium. The CtxB protein retains its pentameric structure during expression and through purification. The latter makes it possible to consider the developed system as a promising tool for the industrial-level production of recombinant CtxB for medical and research purposes.
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Affiliation(s)
- Hamesd H Jamgochian
- Bach Institute of Biochemistry, Federal Research Center for Biotechnology, Russian Academy of Sciences, Moscow, 119071, Russia
| | - Mikhail V Zamakhaev
- Bach Institute of Biochemistry, Federal Research Center for Biotechnology, Russian Academy of Sciences, Moscow, 119071, Russia
| | - Nikolai N Sluchanko
- Bach Institute of Biochemistry, Federal Research Center for Biotechnology, Russian Academy of Sciences, Moscow, 119071, Russia
| | - Anna V Goncharenko
- Bach Institute of Biochemistry, Federal Research Center for Biotechnology, Russian Academy of Sciences, Moscow, 119071, Russia.
| | - Mikhail S Shumkov
- Bach Institute of Biochemistry, Federal Research Center for Biotechnology, Russian Academy of Sciences, Moscow, 119071, Russia
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Gu C, Fan X, Yu W. Functional Diversity of Mammalian Small Heat Shock Proteins: A Review. Cells 2023; 12:1947. [PMID: 37566026 PMCID: PMC10417760 DOI: 10.3390/cells12151947] [Citation(s) in RCA: 4] [Impact Index Per Article: 4.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/27/2023] [Revised: 07/22/2023] [Accepted: 07/24/2023] [Indexed: 08/12/2023] Open
Abstract
The small heat shock proteins (sHSPs), whose molecular weight ranges from 12∼43 kDa, are members of the heat shock protein (HSP) family that are widely found in all organisms. As intracellular stress resistance molecules, sHSPs play an important role in maintaining the homeostasis of the intracellular environment under various stressful conditions. A total of 10 sHSPs have been identified in mammals, sharing conserved α-crystal domains combined with variable N-terminal and C-terminal regions. Unlike large-molecular-weight HSP, sHSPs prevent substrate protein aggregation through an ATP-independent mechanism. In addition to chaperone activity, sHSPs were also shown to suppress apoptosis, ferroptosis, and senescence, promote autophagy, regulate cytoskeletal dynamics, maintain membrane stability, control the direction of cellular differentiation, modulate angiogenesis, and spermatogenesis, as well as attenuate the inflammatory response and reduce oxidative damage. Phosphorylation is the most significant post-translational modification of sHSPs and is usually an indicator of their activation. Furthermore, abnormalities in sHSPs often lead to aggregation of substrate proteins and dysfunction of client proteins, resulting in disease. This paper reviews the various biological functions of sHSPs in mammals, emphasizing the roles of different sHSPs in specific cellular activities. In addition, we discuss the effect of phosphorylation on the function of sHSPs and the association between sHSPs and disease.
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Affiliation(s)
- Chaoguang Gu
- Institute of Biochemistry, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Xiasha High-Tech Zone No.2 Road, Hangzhou 310018, China
| | - Xinyi Fan
- Faculty of Arts and Science, University of Toronto, Toronto, ON M5S1A1, Canada
| | - Wei Yu
- Institute of Biochemistry, College of Life Sciences and Medicine, Zhejiang Sci-Tech University, Xiasha High-Tech Zone No.2 Road, Hangzhou 310018, China
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Chou C, Martin GL, Perera G, Awata J, Larson A, Blanton R, Chin MT. A novel αB-crystallin R123W variant drives hypertrophic cardiomyopathy by promoting maladaptive calcium-dependent signal transduction. Front Cardiovasc Med 2023; 10:1223244. [PMID: 37435054 PMCID: PMC10331725 DOI: 10.3389/fcvm.2023.1223244] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/15/2023] [Accepted: 06/13/2023] [Indexed: 07/13/2023] Open
Abstract
Hypertrophic cardiomyopathy (HCM) is the most common inherited cardiovascular disorder affecting 1 in 500 people in the general population. Characterized by asymmetric left ventricular hypertrophy, cardiomyocyte disarray and cardiac fibrosis, HCM is a highly complex disease with heterogenous clinical presentation, onset and complication. While mutations in sarcomere genes can account for a substantial proportion of familial cases of HCM, 40%-50% of HCM patients do not carry such sarcomere variants and the causal mutations for their diseases remain elusive. Recently, we identified a novel variant of the alpha-crystallin B chain (CRYABR123W) in a pair of monozygotic twins who developed concordant HCM phenotypes that manifested over a nearly identical time course. Yet, how CRYABR123W promotes the HCM phenotype remains unclear. Here, we generated mice carrying the CryabR123W knock-in allele and demonstrated that hearts from these animals exhibit increased maximal elastance at young age but reduced diastolic function with aging. Upon transverse aortic constriction, mice carrying the CryabR123W allele developed pathogenic left ventricular hypertrophy with substantial cardiac fibrosis and progressively decreased ejection fraction. Crossing of mice with a Mybpc3 frame-shift model of HCM did not potentiate pathological hypertrophy in compound heterozygotes, indicating that the pathological mechanisms in the CryabR123W model are independent of the sarcomere. In contrast to another well-characterized CRYAB variant (R120G) which induced Desmin aggregation, no evidence of protein aggregation was observed in hearts expressing CRYABR123W despite its potent effect on driving cellular hypertrophy. Mechanistically, we uncovered an unexpected protein-protein interaction between CRYAB and calcineurin. Whereas CRYAB suppresses maladaptive calcium signaling in response to pressure-overload, the R123W mutation abolished this effect and instead drove pathologic NFAT activation. Thus, our data establish the CryabR123W allele as a novel genetic model of HCM and unveiled additional sarcomere-independent mechanisms of cardiac pathological hypertrophy.
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Affiliation(s)
- Chun Chou
- Department of Medicine, Tufts University School of Medicine, Boston, MA, United States
| | - Gregory L. Martin
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA, United States
| | - Gayani Perera
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA, United States
| | - Junya Awata
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA, United States
| | - Amy Larson
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA, United States
| | - Robert Blanton
- Department of Medicine, Tufts University School of Medicine, Boston, MA, United States
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA, United States
| | - Michael T. Chin
- Department of Medicine, Tufts University School of Medicine, Boston, MA, United States
- Molecular Cardiology Research Institute, Tufts Medical Center, Boston, MA, United States
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