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Córdoba-Beldad CM, Grantham J. The CCTδ subunit of the molecular chaperone CCT is required for correct localisation of p150 Glued to spindle poles during mitosis. Eur J Cell Biol 2024; 103:151430. [PMID: 38897036 DOI: 10.1016/j.ejcb.2024.151430] [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: 02/22/2024] [Revised: 06/10/2024] [Accepted: 06/12/2024] [Indexed: 06/21/2024] Open
Abstract
Chaperonin Containing Tailless complex polypeptide 1 (CCT) is a molecular chaperone composed of eight distinct subunits that can exist as individual monomers or as components of a double oligomeric ring, which is essential for the folding of actin and tubulin and other substrates. Here we assess the role of CCT subunits in the context of cell cycle progression by individual subunit depletions upon siRNA treatment in mammalian cells. The depletion of individual CCT subunits leads to variation in the distribution of cell cycle phases and changes in mitotic index. Mitotic defects, such as unaligned chromosomes occur when CCTδ is depleted, concurrent with a reduction in spindle pole-localised p150Glued, a component of the dynactin complex and a binding partner of monomeric CCTδ. In CCTδ-depleted cells, changes in the elution profile of p150Glued are observed consistent with altered conformations and or assembly states with the dynactin complex. Addition of monomeric CCTδ, in the form of GFP-CCTδ, restores correct p150Glued localisation to the spindle poles and rescues the mitotic segregation defects that occur when CCTδ is depleted. This study demonstrates a requirement for CCTδ in its monomeric form for correct chromosome segregation via a mechanism that promotes the correct localisation of p150Glued, thus revealing further complexities to the interplay between CCT, tubulin folding and microtubule dynamics.
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Affiliation(s)
- Carmen M Córdoba-Beldad
- Department of Chemistry and Molecular Biology, University of Gothenburg, Gothenburg 40530, Sweden
| | - Julie Grantham
- Department of Chemistry and Molecular Biology, University of Gothenburg, Gothenburg 40530, Sweden.
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2
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Zheng L, Chen X, Zhang L, Qin N, An J, Zhu J, Jin H, Tuo B. A potential tumor marker: Chaperonin containing TCP‑1 controls the development of malignant tumors (Review). Int J Oncol 2023; 63:106. [PMID: 37539774 PMCID: PMC10552740 DOI: 10.3892/ijo.2023.5554] [Citation(s) in RCA: 2] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/05/2023] [Accepted: 07/21/2023] [Indexed: 08/05/2023] Open
Abstract
Due to concealment, high invasiveness and a lack of indicators, malignant tumors have emerged as one of the deadliest diseases worldwide and their incidence is rising yearly. Research has revealed that the chaperonin family member, chaperonin containing TCP‑1 (CCT), serves a crucial role in malignant tumors. CCT is involved in the growth of numerous malignant tumors such as lung cancer, breast cancer, hepatocellular carcinoma and colorectal cancer and assists the folding of a number of proteins linked to cancer, such as KRAS, p53 and STAT3. According to clinical data, CCT is highly expressed in a range of tumor cells and is associated with poor patient prognosis. In addition, through controlling the cell cycle or interacting with other proteins (including YAP1, HoXB2 and SMAD2), CCT has an effect on the proliferation, invasion and migration of cancer cells. As a result, it is possible that CCT will become a new tumor marker or therapeutic target, which will provide some guidance for early tumor screening or late tumor prognosis. In the present review, the molecular properties of CCT are introduced, alongside a summary of its interactions with other cancer‑related proteins and a discussion of its function in common malignant tumors. It is expected that the present review will offer fresh approaches to the treatment of cancer.
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Affiliation(s)
- Liming Zheng
- Department of Gastroenterology, Digestive Disease Hospital, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou 563003
| | - Xingyue Chen
- Department of Gastroenterology, Digestive Disease Hospital, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou 563003
| | - Li Zhang
- Department of Gastroenterology, Digestive Disease Hospital, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou 563003
| | - Nannan Qin
- Department of Critical Care Medicine of the First People's Hospital of Zunyi (The Third Affiliated Hospital), Zunyi Medical University, Zunyi, Guizhou 563000, P.R. China
| | - Jiaxing An
- Department of Gastroenterology, Digestive Disease Hospital, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou 563003
| | - Jiaxing Zhu
- Department of Gastroenterology, Digestive Disease Hospital, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou 563003
| | - Hai Jin
- Department of Gastroenterology, Digestive Disease Hospital, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou 563003
| | - Biguang Tuo
- Department of Gastroenterology, Digestive Disease Hospital, Affiliated Hospital of Zunyi Medical University, Zunyi, Guizhou 563003
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Hu HY, Liu YJ. Sequestration of cellular native factors by biomolecular assemblies: Physiological or pathological? BIOCHIMICA ET BIOPHYSICA ACTA. MOLECULAR CELL RESEARCH 2022; 1869:119360. [PMID: 36087810 DOI: 10.1016/j.bbamcr.2022.119360] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Received: 03/10/2022] [Revised: 09/01/2022] [Accepted: 09/02/2022] [Indexed: 06/15/2023]
Abstract
In addition to native-state structures, biomolecules often form condensed supramolecular assemblies or cellular membraneless organelles that are critical for cell life. These biomolecular assemblies, generally including liquid-like droplets (condensates) and amyloid-like aggregates, can sequester or recruit their interacting partners, so as to either modulate various cellular behaviors or even cause disorders. This review article summarizes recent advances in the sequestration of native factors by biomolecular assemblies and discusses their potential consequences on cellular function, homeostasis, and disease pathology.
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Affiliation(s)
- Hong-Yu Hu
- State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai 200031, PR China.
| | - Ya-Jun Liu
- State Key Laboratory of Molecular Biology, Shanghai Institute of Biochemistry and Cell Biology, Center for Excellence in Molecular Cell Science, Chinese Academy of Sciences, Shanghai 200031, PR China; University of Chinese Academy of Sciences, Beijing 100049, PR China
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Smith TM, Willardson BM. Mechanistic insights into protein folding by the eukaryotic chaperonin complex CCT. Biochem Soc Trans 2022; 50:1403-1414. [PMID: 36196890 PMCID: PMC9704529 DOI: 10.1042/bst20220591] [Citation(s) in RCA: 5] [Impact Index Per Article: 2.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/27/2022] [Revised: 09/08/2022] [Accepted: 09/09/2022] [Indexed: 11/17/2022]
Abstract
The cytosolic chaperonin CCT is indispensable to eukaryotic life, folding the cytoskeletal proteins actin and tubulin along with an estimated 10% of the remaining proteome. However, it also participates in human diseases such as cancer and viral infections, rendering it valuable as a potential therapeutic target. CCT consists of two stacked rings, each comprised of eight homologous but distinct subunits, that assists the folding of a remarkable substrate clientele that exhibits both broad diversity and specificity. Much of the work in recent years has been aimed at understanding the mechanisms of CCT substrate recognition and folding. These studies have revealed new binding sites and mechanisms by which CCT uses its distinctive subunit arrangement to fold structurally unrelated substrates. Here, we review recent structural insights into CCT-substrate interactions and place them into the broader context of CCT function and its implications for human health.
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Affiliation(s)
- Theresa M. Smith
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602, U.S.A
| | - Barry M. Willardson
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602, U.S.A
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Du Q, Zhang X, Xu N, Ma M, Miao B, Huang Y, Tong D. Chaperonin CCT5 binding with porcine parvovirus NS1 promotes the interaction of NS1 and COPƐ to facilitate viral replication. Vet Microbiol 2022; 274:109574. [PMID: 36126504 DOI: 10.1016/j.vetmic.2022.109574] [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: 07/19/2022] [Revised: 09/08/2022] [Accepted: 09/11/2022] [Indexed: 10/31/2022]
Abstract
Porcine parvovirus (PPV) is an important pathogen causing reproductive disorders in first pregnant sows. The non-structure protein NS1 of PPV is a multifunctional protein playing a key role in viral replication. Chaperonin-containing T-complex polypeptide complex (CCT), containing CCT1-CCT8 subunits, belongs to the type II chaperones that interact with proteins to help in folding and maintaining. In this study, CCT5, for the first time, was found to be one of the host interacting proteins of PPV NS1, and CCT5 was directly bound with NS1. Interference of CCT5 expression by specific siRNA and knockout of CCT5 expression by CRISPR/Cas9 suppressed PPV replication, while overexpression of CCT5 promoted PPV replication in PK-15 cells. The interaction of CCT5 and PPV NS1 was dependent on the 36-42 aa motif at the N-terminal end of NS1. More importantly, CCT5 was also found interacting with COPƐ, which has previously been demonstrated to promote PPV replication by regulating type I interferon. Interference and knockout of CCT5 expression significantly reduced the interaction of PPV NS1 and host protein COPƐ, and promoted the IFN-β expression. These results show that CCT5 mediates the interaction of PPV NS1 and COPƐ to regulate viral replication, providing new insight into the mechanism of PPV replication.
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Affiliation(s)
- Qian Du
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
| | - Xuezhi Zhang
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
| | - Ning Xu
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
| | - Mengyu Ma
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
| | - Bicheng Miao
- College of Veterinary Medicine, Northwest A&F University, Yangling, China
| | - Yong Huang
- College of Veterinary Medicine, Northwest A&F University, Yangling, China.
| | - Dewen Tong
- College of Veterinary Medicine, Northwest A&F University, Yangling, China.
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Horovitz A, Reingewertz TH, Cuéllar J, Valpuesta JM. Chaperonin Mechanisms: Multiple and (Mis)Understood? Annu Rev Biophys 2022; 51:115-133. [DOI: 10.1146/annurev-biophys-082521-113418] [Citation(s) in RCA: 3] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022]
Abstract
The chaperonins are ubiquitous and essential nanomachines that assist in protein folding in an ATP-driven manner. They consist of two back-to-back stacked oligomeric rings with cavities in which protein (un)folding can take place in a shielding environment. This review focuses on GroEL from Escherichia coli and the eukaryotic chaperonin-containing t-complex polypeptide 1, which differ considerably in their reaction mechanisms despite sharing a similar overall architecture. Although chaperonins feature in many current biochemistry textbooks after being studied intensively for more than three decades, key aspects of their reaction mechanisms remain under debate and are discussed in this review. In particular, it is unclear whether a universal reaction mechanism operates for all substrates and whether it is passive, i.e., aggregation is prevented but the folding pathway is unaltered, or active. It is also unclear how chaperonin clients are distinguished from nonclients and what are the precise roles of the cofactors with which chaperonins interact. Expected final online publication date for the Annual Review of Biophysics, Volume 51 is May 2022. Please see http://www.annualreviews.org/page/journal/pubdates for revised estimates.
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Affiliation(s)
- Amnon Horovitz
- Department of Chemical and Structural Biology, Weizmann Institute of Science, Rehovot, Israel; Amnon.H
| | - Tali Haviv Reingewertz
- Department of Chemical and Structural Biology, Weizmann Institute of Science, Rehovot, Israel; Amnon.H
| | - Jorge Cuéllar
- Department of Macromolecular Structure, Centro Nacional de Biotecnología (CNB-CSIC), Madrid, Spain
| | - José María Valpuesta
- Department of Macromolecular Structure, Centro Nacional de Biotecnología (CNB-CSIC), Madrid, Spain
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Cuellar J, Vallin J, Svanström A, Maestro-López M, Teresa Bueno-Carrasco M, Grant Ludlam W, Willardson BM, Valpuesta JM, Grantham J. The molecular chaperone CCT sequesters gelsolin and protects it from cleavage by caspase-3. J Mol Biol 2021; 434:167399. [PMID: 34896365 DOI: 10.1016/j.jmb.2021.167399] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/28/2021] [Revised: 11/19/2021] [Accepted: 12/03/2021] [Indexed: 11/27/2022]
Abstract
The actin filament severing and capping protein gelsolin plays an important role in modulation of actin filament dynamics by influencing the number of actin filament ends. During apoptosis, gelsolin becomes constitutively active due to cleavage by caspase-3. In non-apoptotic cells gelsolin is activated by the binding of Ca2+. This activated form of gelsolin binds to, but is not a folding substrate of the molecular chaperone CCT/TRiC. Here we demonstrate that in vitro, gelsolin is protected from cleavage by caspase-3 in the presence of CCT. Cryoelectron microscopy and single particle 3D reconstruction of the CCT:gelsolin complex reveals that gelsolin is located in the interior of the chaperonin cavity, with a placement distinct from that of the obligate CCT folding substrates actin and tubulin. In cultured mouse melanoma B16F1 cells, gelsolin co-localises with CCT upon stimulation of actin dynamics at peripheral regions during lamellipodia formation. These data indicate that localised sequestration of gelsolin by CCT may provide spatial control of actin filament dynamics.
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Affiliation(s)
- Jorge Cuellar
- Department of Macromolecular Structures, Centro Nacional de Biotecnología (CNB-CSIC), Madrid, 28049, Spain.
| | - Josefine Vallin
- Department of Chemistry and Molecular Biology, University of Gothenburg, Medicinaregatan 9C, 40530 Gothenburg, Sweden
| | - Andreas Svanström
- Department of Chemistry and Molecular Biology, University of Gothenburg, Medicinaregatan 9C, 40530 Gothenburg, Sweden
| | - Moisés Maestro-López
- Department of Macromolecular Structures, Centro Nacional de Biotecnología (CNB-CSIC), Madrid, 28049, Spain
| | | | - W Grant Ludlam
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602, USA
| | - Barry M Willardson
- Department of Chemistry and Biochemistry, Brigham Young University, Provo, UT 84602, USA
| | - José M Valpuesta
- Department of Macromolecular Structures, Centro Nacional de Biotecnología (CNB-CSIC), Madrid, 28049, Spain
| | - Julie Grantham
- Department of Chemistry and Molecular Biology, University of Gothenburg, Medicinaregatan 9C, 40530 Gothenburg, Sweden.
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Vallin J, Grantham J. Functional assessment of the V390F mutation in the CCTδ subunit of chaperonin containing tailless complex polypeptide 1. Cell Stress Chaperones 2021; 26:955-964. [PMID: 34655026 PMCID: PMC8578507 DOI: 10.1007/s12192-021-01237-x] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Grants] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/08/2021] [Revised: 08/19/2021] [Accepted: 09/07/2021] [Indexed: 11/24/2022] Open
Abstract
The chaperonin containing tailless complex polypeptide 1 (CCT) is a multi-subunit molecular chaperone. It is found in the cytoplasm of all eukaryotic cells, where the oligomeric form plays an essential role in the folding of predominantly the cytoskeletal proteins actin and tubulin. Both the CCT oligomer and monomeric subunits also display functions that extend beyond folding, which are often associated with microtubules and actin filaments. Here, we assess the functional significance of the CCTδ V390F mutation, reported in several cancer cell lines. Upon transfection into B16F1 mouse melanoma cells, GFP-CCTδV390F incorporates into the CCT oligomer more readily than GFP-CCTδ. Furthermore, unlike GFP-CCTδ, GFP-CCTδV390F does not interact with the dynactin complex component, p150Glued. As CCTδ has previously been implicated in altered migration in wound healing assays, we assessed the behaviour of GFP-CCTδV390F and other mutants of CCTδ, previously used to assess functional interactions with p150Glued, in chemotaxis assays. We developed the assay system to incorporate a layer of the inert hydrogel GrowDex® to provide a 3D matrix for chemotaxis assessment and found subtle differences in the migration of B16F1 cells, depending on the presence of the hydrogel.
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Affiliation(s)
- Josefine Vallin
- Department of Chemistry and Molecular Biology, University of Gothenburg, 40530, Gothenburg, Sweden
| | - Julie Grantham
- Department of Chemistry and Molecular Biology, University of Gothenburg, 40530, Gothenburg, Sweden.
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