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Kusunoki H, Sakamoto T, Kobayashi N, Kohno T, Wakamatsu K, Nagata T. Structural Insights into the Interaction between the C-Terminal-Deleted BH3-like Motif Peptide of Hepatitis B Virus X Protein and Bcl-x L. Biochemistry 2024; 63:632-643. [PMID: 38377677 DOI: 10.1021/acs.biochem.3c00709] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/22/2024]
Abstract
Hepatitis B virus X protein (HBx) plays a crucial role in the development of hepatocellular carcinoma (HCC) associated with hepatitis B virus (HBV) infection. The full-length HBx protein interacts with Bcl-xL and is involved in the HBV replication and cell death processes. The three hydrophobic residues Trp120, Leu123, and Ile127 of the HBx BH3-like motif are essential for the Bcl-xL-binding. On the other hand, various lengths of C-terminal-truncated HBx mutants are frequently detected in HCC tissues, and these mutants, rather than the full-length HBx, appear to be responsible for HCC development. Notably, the region spanning residues 1-120 of HBx [HBx(1 and 120)] has been strongly associated with an increased risk of HCC development. However, the mode of interaction between HBx(1-120) and Bcl-xL remains unclear. HBx(1-120) possesses only Trp120 among the three hydrophobic residues essential for the Bcl-xL-binding. To elucidate this interaction mode, we employed a C-terminal-deleted HBx BH3-like motif peptide composed of residues 101-120. Here, we present the NMR complex structure of Bcl-xL and HBx(101-120). Our results demonstrate that HBx(101-120) binds to Bcl-xL in a weaker manner. Considering the high expression of Bcl-xL in HCC cells, this weak interaction, in conjunction with the overexpression of Bcl-xL in HCC cells, may potentially contribute to HCC development through the interaction between C-terminal-truncated HBx and Bcl-xL.
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Affiliation(s)
- Hideki Kusunoki
- Research Center for Biological Products in the Next Generation, National Institute of Infectious Diseases, Musashimurayama, Tokyo 208-0011, Japan
| | - Taiichi Sakamoto
- Department of Life Science, Faculty of Advanced Engineering, Chiba Institute of Technology, Narashino, Chiba 275-0016, Japan
| | - Naohiro Kobayashi
- Laboratory for Advanced NMR Application and Development, RIKEN Center for Biosystems Dynamics Research, Yokohama, Kanagawa 230-0045, Japan
| | - Toshiyuki Kohno
- Department of Medical Informatics, Research and Development Center for Medical Education, Kitasato University School of Medicine, Sagamihara, Kanagawa 252-0374, Japan
| | - Kaori Wakamatsu
- Department of Chemistry and Chemical Biology, Graduate School of Engineering, Gunma University, Kiryu, Gunma 376-8515, Japan
| | - Takashi Nagata
- Institute of Advanced Energy, Kyoto University, Kyoto, Uji 611-0011, Japan
- Graduate School of Energy Science, Kyoto University, Kyoto, Uji 611-0011, Japan
- Integrated Research Center for Carbon Negative Science, Kyoto University, Kyoto, Uji 611-0011, Japan
- Biomass Product Tree Industry-Academia Collaborative Research Laboratory, Kyoto University, Kyoto, Uji 611-0011, Japan
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2
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Yue F, Zeng X, Wang Y, Fang Y, Yue M, Zhao X, Zhu R, Zeng Q, Wei J, Chen T. Bifidobacterium longum SX-1326 ameliorates gastrointestinal toxicity after irinotecan chemotherapy via modulating the P53 signaling pathway and brain-gut axis. BMC Microbiol 2024; 24:8. [PMID: 38172689 PMCID: PMC10763180 DOI: 10.1186/s12866-023-03152-w] [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: 10/23/2023] [Accepted: 12/11/2023] [Indexed: 01/05/2024] Open
Abstract
BACKGROUND Colorectal cancer (CRC) is a prevalent malignant malignancy affecting the gastrointestinal tract that is usually treated clinically with chemotherapeutic agents, whereas chemotherapeutic agents can cause severe gastrointestinal toxicity, which brings great pain to patients. Therefore, finding effective adjuvant agents for chemotherapy is crucial. METHODS In this study, a CRC mouse model was successfully constructed using AOM/DSS, and the treatment was carried out by probiotic Bifidobacterium longum SX-1326 (B. longum SX-1326) in combination with irinotecan. Combining with various techniques of modern biomedical research, such as Hematoxylin and Eosin (H&E), Immunohistochemistry (IHC), Western blotting and 16S rDNA sequencing, we intend to elucidate the effect and mechanism of B. longum SX-1326 in improving the anticancer efficacy and reducing the side effects on the different levels of molecules, animals, and bacteria. RESULTS Our results showed that B. longum SX-1326 enhanced the expression of Cleaved Caspase-3 (M vs. U = p < 0.01) and down-regulated the expression level of B-cell lymphoma-2 (Bcl-2) through up-regulation of the p53 signaling pathway in CRC mice, which resulted in an adjuvant effect on the treatment of CRC with irinotecan. Moreover, B. longum SX-1326 was also able to regulate the gut-brain-axis (GBA) by restoring damaged enterochromaffin cells, reducing the release of 5-hydroxytryptamine (5-HT) in brain tissue (I vs. U = 89.26 vs. 75.03, p < 0.05), and further alleviating the adverse effects of nausea and vomiting. In addition, B. longum SX-1326 reversed dysbiosis in CRC model mice by increasing the levels of Dehalobacterium, Ruminnococcus, and Mucispirillum. And further alleviated colorectal inflammation by downregulating the TLR4/MyD88/NF-κB signaling pathway. CONCLUSIONS In conclusion, our work reveals that B. longum SX-1326 has a favorable effect in adjuvant irinotecan for CRC and amelioration of post-chemotherapy side effects, and also provides the theoretical basis and data for finding a safe and efficient chemotherapeutic adjuvant.
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Affiliation(s)
- Fenfang Yue
- School of Life Science, Nanchang University, Nanchang, 330031, China
- National Engineering Research Center for Bioengineering Drugs and the Technologies, Institute of Translational Medicine, JiangXi Medical College, Nanchang University, Nanchang, 330031, China
| | - Xiangdi Zeng
- National Engineering Research Center for Bioengineering Drugs and the Technologies, Institute of Translational Medicine, JiangXi Medical College, Nanchang University, Nanchang, 330031, China
| | - Yufan Wang
- National Engineering Research Center for Bioengineering Drugs and the Technologies, Institute of Translational Medicine, JiangXi Medical College, Nanchang University, Nanchang, 330031, China
| | - Yilin Fang
- National Engineering Research Center for Bioengineering Drugs and the Technologies, Institute of Translational Medicine, JiangXi Medical College, Nanchang University, Nanchang, 330031, China
| | - Mengyun Yue
- Department of Neurology, The First Affiliated Hospital, Jiang Xi Medical College, Nanchang University, Nanchang, 330031, China
| | - Xuanqi Zhao
- School of Life Science, Nanchang University, Nanchang, 330031, China
- National Engineering Research Center for Bioengineering Drugs and the Technologies, Institute of Translational Medicine, JiangXi Medical College, Nanchang University, Nanchang, 330031, China
| | - Ruizhe Zhu
- National Engineering Research Center for Bioengineering Drugs and the Technologies, Institute of Translational Medicine, JiangXi Medical College, Nanchang University, Nanchang, 330031, China
| | - Qingwei Zeng
- National Engineering Research Center for Bioengineering Drugs and the Technologies, Institute of Translational Medicine, JiangXi Medical College, Nanchang University, Nanchang, 330031, China
| | - Jing Wei
- National Engineering Research Center for Bioengineering Drugs and the Technologies, Institute of Translational Medicine, JiangXi Medical College, Nanchang University, Nanchang, 330031, China
| | - Tingtao Chen
- School of Life Science, Nanchang University, Nanchang, 330031, China.
- National Engineering Research Center for Bioengineering Drugs and the Technologies, Institute of Translational Medicine, JiangXi Medical College, Nanchang University, Nanchang, 330031, China.
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Okuda M, Tsunaka Y, Nishimura Y. Dynamic structures of intrinsically disordered proteins related to the general transcription factor TFIIH, nucleosomes, and histone chaperones. Biophys Rev 2022; 14:1449-1472. [PMID: 36659983 PMCID: PMC9842849 DOI: 10.1007/s12551-022-01014-9] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/13/2022] [Accepted: 11/06/2022] [Indexed: 11/19/2022] Open
Abstract
Advances in structural analysis by cryogenic electron microscopy (cryo-EM) and X-ray crystallography have revealed the tertiary structures of various chromatin-related proteins, including transcription factors, RNA polymerases, nucleosomes, and histone chaperones; however, the dynamic structures of intrinsically disordered regions (IDRs) in these proteins remain elusive. Recent studies using nuclear magnetic resonance (NMR), together with molecular dynamics (MD) simulations, are beginning to reveal dynamic structures of the general transcription factor TFIIH complexed with target proteins including the general transcription factor TFIIE, the tumor suppressor p53, the cell cycle protein DP1, the DNA repair factors XPC and UVSSA, and three RNA polymerases, in addition to the dynamics of histone tails in nucleosomes and histone chaperones. In complexes of TFIIH, the PH domain of the p62 subunit binds to an acidic string formed by the IDR in TFIIE, p53, XPC, UVSSA, DP1, and the RPB6 subunit of three RNA polymerases by a common interaction mode, namely extended string-like binding of the IDR on the positively charged surface of the PH domain. In the nucleosome, the dynamic conformations of the N-tails of histones H2A and H2B are correlated, while the dynamic conformations of the N-tails of H3 and H4 form a histone tail network dependent on their modifications and linker DNA. The acidic IDRs of the histone chaperones of FACT and NAP1 play important roles in regulating the accessibility to histone proteins in the nucleosome.
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Affiliation(s)
- Masahiko Okuda
- Graduate School of Medical Life Science, Yokohama City University, 1-7-29 Suehiro-Cho, Tsurumi-Ku, Yokohama, 230-0045 Japan
| | - Yasuo Tsunaka
- Graduate School of Medical Life Science, Yokohama City University, 1-7-29 Suehiro-Cho, Tsurumi-Ku, Yokohama, 230-0045 Japan
| | - Yoshifumi Nishimura
- Graduate School of Medical Life Science, Yokohama City University, 1-7-29 Suehiro-Cho, Tsurumi-Ku, Yokohama, 230-0045 Japan
- Graduate School of Integrated Sciences for Life, Hiroshima University, 1-4-4 Kagamiyama, Higashi-Hiroshima, 739-8528 Japan
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Lee M, Lee S, Choi J, Ryu M, Lee M, Kim J, Hwang E, Lee C, Chi S, Ryu K. MUL1‐RING recruits the substrate, p53‐TAD as a complex with UBE2D2–UB conjugate. FEBS J 2022; 289:3568-3586. [PMID: 35048531 PMCID: PMC9304225 DOI: 10.1111/febs.16360] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/20/2021] [Revised: 01/06/2022] [Accepted: 01/18/2022] [Indexed: 12/03/2022]
Abstract
The RING domain of MUL1 (RINGMUL1) alone mediates ubiquitylation of the p53‐transactivation domain (TADp53). To elucidate the mechanism underlying the simultaneous recruitment of UBE2D2 and the substrate TADp53 by RINGMUL1, we determined the complex structure of RINGMUL1:UBE2D2 and studied the interaction between RINGMUL1 and TADp53 in the presence of UBE2D2–UB thioester (UBE2D2~UB) mimetics. The RINGMUL1‐binding induced the closed conformation of UBE2D2S22R/C85S–UBK48R oxyester (UBE2D2RS–UBROE), and strongly accelerated its hydrolysis, which was suppressed by the additional N77A‐mutation of UBE2D2. Interestingly, UBE2D2S22R/N77A/C85S–UBK48R oxyester (UBE2D2RAS–UBROE) already formed a closed conformation in the absence of RINGMUL1. Although TADp53 exhibited weak binding for RINGMUL1 or UBE2D2 alone, its binding affinity was enhanced and even further for RINGMUL1:UBE2D2 and RINGMUL1:UBE2D2RAS–UBROE, respectively. The recognition of TADp53 by RINGMUL1 as a complex with UBE2D2~UB is related to the multivalency of the binding events and underlies the ability of RINGMUL1 to ubiquitylate the intrinsically disordered protein, TADp53.
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Affiliation(s)
- Min‐Sung Lee
- Disease Target Structure Research Center Division of Biomedical Research KRIBB Daejeon South Korea
- Department of Proteome Structural Biology KRIBB School of Bioscience University of Science and Technology Daejeon South Korea
| | - Sang‐Ok Lee
- Disease Target Structure Research Center Division of Biomedical Research KRIBB Daejeon South Korea
- College of Pharmacy Chungbuk National University Cheongju‐si South Korea
| | - Joonhyeok Choi
- Ochang Center Korea Basic Science Institute Cheongju‐Si South Korea
| | - Minju Ryu
- Disease Target Structure Research Center Division of Biomedical Research KRIBB Daejeon South Korea
- Department of Proteome Structural Biology KRIBB School of Bioscience University of Science and Technology Daejeon South Korea
| | - Mi‐Kyung Lee
- Disease Target Structure Research Center Division of Biomedical Research KRIBB Daejeon South Korea
- Department of Proteome Structural Biology KRIBB School of Bioscience University of Science and Technology Daejeon South Korea
| | - Ji‐Hun Kim
- College of Pharmacy Chungbuk National University Cheongju‐si South Korea
| | - Eunha Hwang
- Ochang Center Korea Basic Science Institute Cheongju‐Si South Korea
| | - Chong‐Kil Lee
- College of Pharmacy Chungbuk National University Cheongju‐si South Korea
| | - Seung‐Wook Chi
- Disease Target Structure Research Center Division of Biomedical Research KRIBB Daejeon South Korea
- Department of Proteome Structural Biology KRIBB School of Bioscience University of Science and Technology Daejeon South Korea
| | - Kyoung‐Seok Ryu
- Ochang Center Korea Basic Science Institute Cheongju‐Si South Korea
- Department of Bio‐Analytical Science University of Science and Technology Daejeon South Korea
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Bursatella leachii Purple Ink Secretion Concentrate Exerts Cytotoxic Properties against Human Hepatocarcinoma Cell Line (HepG2): In Vitro and In Silico Studies. Molecules 2022; 27:molecules27030826. [PMID: 35164089 PMCID: PMC8839718 DOI: 10.3390/molecules27030826] [Citation(s) in RCA: 1] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/06/2021] [Revised: 01/23/2022] [Accepted: 01/24/2022] [Indexed: 11/17/2022] Open
Abstract
Liver cancer is a leading cause of cancer death globally. Marine mollusc-derived drugs have gained attention as potential natural-based anti-cancer agents to overcome the side effects caused by conventional chemotherapeutic drugs during cancer therapy. Using liquid chromatography-mass spectrometry, the main biomolecules in the purple ink secretion released by the sea hare, named Bursatella leachii (B. leachii), were identified as hectochlorin, malyngamide X, malyngolide S, bursatellin and lyngbyatoxin A. The cytotoxic effects of B. leachii ink concentrate against human hepatocarcinoma (HepG2) cells were determined to be dose- and time-dependent, and further exploration of the underlying mechanisms causing the programmed cell death (apoptosis) were performed. The expression of cleaved-caspase-8 and cleaved-caspase-3, key cysteine-aspartic proteases involved in the initiation and completion of the apoptosis process, appeared after HepG2 cell exposure to the B. leachii ink concentrate. The gene expression levels of pro-apoptotic BAX, TP53 and Cyclin D1 were increased after treatment with the B. leachii ink concentrate. Applying in silico approaches, the high scores predicted that bioactivities for the five compounds were protease and kinase inhibitors. The ADME and cytochrome profiles for the compounds were also predicted. Altogether, the B. leachii ink concentrate has high pro-apoptotic potentials, suggesting it as a promising safe natural product-based drug for the treatment of liver cancer.
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Jana A, Thomas J, Ghosh P. DNA Fragmentation and mRNA Expression of Bcl-2, Bcl-xL, p53, p21 and HSP70 Genes in Nondysplastic and Dysplastic Oral Lichen Planus. Contemp Clin Dent 2022; 13:249-254. [PMID: 36213854 PMCID: PMC9533384 DOI: 10.4103/ccd.ccd_1027_20] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Abstract] [Key Words] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/10/2020] [Revised: 01/21/2021] [Accepted: 02/09/2021] [Indexed: 11/28/2022] Open
Abstract
BACKGROUND Oral lichen planus (OLP) is a chronic inflammatory disease. Apoptosis of the basal keratinocytes is a causative factor for OLP pathogenesis but the detailed mechanism of apoptosis among nondysplastic and dysplastic OLP lesions is yet unraveled. AIMS This study aims to evaluate the involvement of cellular DNA fragmentation and alteration in the expression of Bcl-2 and B-cell lymphoma extra-large (Bcl-xL), p53, p21 and heat shock protein 70 (HSP70) in nondysplastic and dysplastic OLP lesions. MATERIALS AND METHODS Untreated, fifteen OLP patients each with nondysplastic and dysplastic lesions were enrolled for this study. Their DNA fragmentation was analyzed by the agarose gel electrophoresis method. The mRNA expression of Bcl-2, Bcl-xL, p53, p21 and HSP70 were measured using semi-quantitative reverse transcription-polymerase chain reaction. RESULTS Elevated DNA fragmentations were found in dysplastic lesions compared to nondysplastic type. Significantly higher expression of Bcl-2, Bcl-xL, p53 and p21 were found in both types of OLP lesion compared to the control. Expression of Bcl-2 and Bcl-xL were significantly elevated in nondysplastic lesions, whereas significantly overexpression of p53 and p21 were found in dysplastic lesions. Anti-stress protein HSP70 was overtly expressed in dysplastic lesions compared to other groups. CONCLUSION Reduced expression of Bcl-2 and Bcl-xL, with elevated DNA fragmentation, may be associated with increased apoptosis in dysplastic lesions which aid in the resolution of the chronic inflammatory process. Higher expression of p53 and p21 in dysplastic lesions reflect its malignant potentiality. Overexpression of HSP70 in dysplastic lesions is a useful marker for higher cellular stress.
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Affiliation(s)
- Abhishek Jana
- Department Physiology, West Bengal State University, Kolkata, West Bengal, India,Department of Oral Medicine and Radiology, PMS College of Dental Sciences and Research, Trivandrum, Kerala, India
| | - Jincy Thomas
- Department of Oral Medicine and Radiology, PMS College of Dental Sciences and Research, Trivandrum, Kerala, India
| | - Pratiti Ghosh
- Department Physiology, West Bengal State University, Kolkata, West Bengal, India,Address for correspondence:Prof. Pratiti Ghosh, Department Physiology West Bengal State University, Kolkata - 700 126, West Bengal, India. E-mail:
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Boonjing S, Pothongsrisit S, Wattanathamsan O, Sritularak B, Pongrakhananon V. Erianthridin Induces Non-small Cell Lung Cancer Cell Apoptosis through the Suppression of Extracellular Signal-regulated Kinase Activity. PLANTA MEDICA 2021; 87:283-293. [PMID: 33212515 DOI: 10.1055/a-1295-8606] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/11/2023]
Abstract
Due to the high mortality of lung cancer, natural derivative compounds have been promoted as versatile sources for anticancer drug discovery. Erianthridin, a phenanthrene compound isolated from Dendrobium formosum, exhibits intriguing apoptosis-inducing effects in non-small cell lung cancer cells. Apoptotic nuclei staining assays showed that apoptotic cells with DNA fragmentation and apoptotic bodies were apparent, and an increase in annexin V-FITC-positive cells were found in cells treated with erianthridin. The apoptosis protein markers for cleaved caspase-3 and cleaved poly-ADP-ribose polymerase were significantly upregulated in response to erianthridin. A mechanistic investigation revealed that erianthridin was able to attenuate extracellular signal-regulated kinase activity and thereby mediate apoptosis through the modulation of Bcl-2 family protein levels. U0126, an extracellular signal-regulated kinase inhibitor, augmented the apoptosis-inducing effect of erianthridin; in contrast, overexpression of exogenous extracellular signal-regulated kinase substantially abrogated erianthridin activity. Furthermore, an in vitro 3D tumorigenesis assay showed that erianthridin was able to potentially suppress lung cancer cell proliferation. This study is the first to report a promising cytotoxic effect of erianthridin, which provides preclinical evidence for further research and development of this compound.
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Affiliation(s)
- Sirima Boonjing
- Department of Pharmacology and Physiology, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand
| | - Sutthaorn Pothongsrisit
- Department of Pharmacology and Physiology, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand
| | - Onsurang Wattanathamsan
- Inter-department Program of Pharmacology, Graduate School, Chulalongkorn University, Bangkok, Thailand
| | - Boonchoo Sritularak
- Department of Pharmacognosy and Pharmaceutical Botany, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand
| | - Varisa Pongrakhananon
- Department of Pharmacology and Physiology, Faculty of Pharmaceutical Sciences, Chulalongkorn University, Bangkok, Thailand
- Preclinical Toxicity and Efficacy Assessment of Medicines and Chemicals Research Cluster, Chulalongkorn University, Bangkok, Thailand
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Han CW, Lee HN, Jeong MS, Park SY, Jang SB. Structural basis of the p53 DNA binding domain and PUMA complex. Biochem Biophys Res Commun 2021; 548:39-46. [PMID: 33631672 DOI: 10.1016/j.bbrc.2021.02.049] [Citation(s) in RCA: 6] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/10/2021] [Accepted: 02/11/2021] [Indexed: 11/18/2022]
Abstract
PUMA (p53-upregulated modulator of apoptosis) is localized in mitochondria and a direct target in p53-mediated apoptosis. p53 elicits mitochondrial apoptosis via transcription-dependent and independent mechanisms. p53 is known to induce apoptosis via the transcriptional induction of PUMA, which encodes proapoptotic BH3-only members of the Bcl-2 protein family. However, the transcription-independent mechanisms of human PUMA remain poorly defined. For example, it is not known whether PUMA interacts directly with the DNA binding domain (DBD: residues 92-293) of p53 in vitro. Here, the structure of the complex between the DBD of p53 and PUMA peptide was elucidated by X-ray crystallography. Isothermal titration calorimetry showed that PUMA peptide binds strongly with p53 DBD, and the crystal structure of p53-PUMA peptide complex revealed it contains four molecules of p53 DBD and one PUMA peptide per asymmetric unit in space group P1. PUMA peptide bound to the N-terminal residues of p53 DBD. A cell proliferation assay demonstrated PUMA peptide inhibited the growth of a lung cancer cell line. These results contribute to understanding of the mechanism responsible for p53-mediated apoptosis.
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Affiliation(s)
- Chang Woo Han
- Department of Molecular Biology, College of Natural Sciences, Pusan National University, 2Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea
| | - Han Na Lee
- Department of Molecular Biology, College of Natural Sciences, Pusan National University, 2Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea
| | - Mi Suk Jeong
- Korea Nanobiotechnology Center, Pusan National University, 2,Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea
| | - So Young Park
- Department of Molecular Biology, College of Natural Sciences, Pusan National University, 2Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea
| | - Se Bok Jang
- Department of Molecular Biology, College of Natural Sciences, Pusan National University, 2Busandaehak-ro 63beon-gil, Geumjeong-gu, Busan, 46241, Republic of Korea.
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Rameshbabu S, Messaoudi SA, Alehaideb ZI, Ali MS, Venktraman A, Alajmi H, Al-Eidi H, Matou-Nasri S. Anastatica hierochuntica (L.) methanolic and aqueous extracts exert antiproliferative effects through the induction of apoptosis in MCF-7 breast cancer cells. Saudi Pharm J 2020; 28:985-993. [PMID: 32792843 PMCID: PMC7414070 DOI: 10.1016/j.jsps.2020.06.020] [Citation(s) in RCA: 6] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/24/2020] [Accepted: 06/29/2020] [Indexed: 12/18/2022] Open
Abstract
Breast cancer therapy using anticancer bioactive compounds derived from natural products as adjuvant treatment has gained recognition due to expensive and toxic conventional chemotherapeutic drugs. The whole plant of Anastatica hierochuntica (L.) (A. hierochuntica) has been investigated for its pharmacologically important anticancer properties but without categorizing the biological activities of the plant parts. We assessed the anticancer potential of different parts of A. hierochuntica (seeds, stems and leaves) and explored their mechanisms of action using the human breast cancer cell line, MCF-7. Currently, we investigated the antiproliferative effects of methanolic (MSD, MST, ML) and aqueous (ASD, AST, AL) extracts of A. hierochuntica plant parts on the MCF-7 cells using cell viability assays. Flow cytometry, Western Blot, DNA fragmentation, and gene expression assays were performed to evaluate apoptosis and cell cycle regulatory proteins. The results indicate that the methanolic and aqueous extracts decreased MCF-7 cell viability in a dose-dependent manner. The induction of apoptosis was observed in all the methanolic and aqueous-treated MCF-7 cells. The cell death process was confirmed by the visualization of DNA fragmentation and cleavage of the intrinsic apoptotic pathways, caspase-9 and caspase-3, the key enzyme causing apoptosis hallmarks. In addition, the most pro-apoptotic extracts, ASD and ML, up-regulated the expression of pro-apoptotic Bax, tumor suppressor TP53 genes and the cyclin inhibitor CDKN1A gene. In conclusion, of the aqueous and methanolic extracts of A. hierochuntica plant parts exerting antiproliferative effects through the induction of apoptosis in breast cancer MCF-7 cells, ASD and ML extracts were the most promising natural-based drugs for the treatment of breast cancer.
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Key Words
- AL, aqueous extract of A. hierochuntica’s leaf
- ASD, aqueous extract of A. hierochuntica’s seed
- AST, aqueous extract of A. hierochuntica’s stem
- Anastatica hierochuntica
- Apoptosis
- BC, breast cancer
- Breast cancer
- CDK, cyclin-dependent kinase
- Cell cycle
- MCF-7, Michigan Cancer Foundation-7
- ML, methanolic extract of A. hierochuntica’s leaf
- MSD, methanolic extract of A. hierochuntica’s seed
- MST, methanolic extract of A. hierochuntica’s stem
- NP40, Nonidet P-40
- Natural products
- P53
- STS, Staurosporine
- TP53, tumor protein p53
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Affiliation(s)
- Saranya Rameshbabu
- Post Graduate and Research Department of Biochemistry, Mohamed Sathak College of Arts and Science, Tamil Nadu, India
| | - Safia A. Messaoudi
- Department of Forensic Sciences, College of Criminal Justice, Naif Arab University for Security Sciences, Riyadh, Saudi Arabia
| | - Zeyad Ibrahim Alehaideb
- Cell and Gene Therapy Group, Medical Genomics Research Department, King Abdullah International Medical Research Center, Ministry of National Guard-Health Affairs, Riyadh, Saudi Arabia
- King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
| | - Mohammed Syed Ali
- Department of Biotechnology, Mohamed Sathak College of Arts and Science, Tamil Nadu, India
| | - Anuradha Venktraman
- Post Graduate and Research Department of Biochemistry, Mohamed Sathak College of Arts and Science, Tamil Nadu, India
| | - Hala Alajmi
- Biobank, King Abdullah International Medical Research Center, Ministry of National Guard-Health Affairs, Riyadh, Saudi Arabia
| | - Hamad Al-Eidi
- Cell and Gene Therapy Group, Medical Genomics Research Department, King Abdullah International Medical Research Center, Ministry of National Guard-Health Affairs, Riyadh, Saudi Arabia
| | - Sabine Matou-Nasri
- Cell and Gene Therapy Group, Medical Genomics Research Department, King Abdullah International Medical Research Center, Ministry of National Guard-Health Affairs, Riyadh, Saudi Arabia
- King Saud bin Abdulaziz University for Health Sciences, Riyadh, Saudi Arabia
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Kusunoki H, Tanaka T, Kohno T, Kimura H, Hosoda K, Wakamatsu K, Hamaguchi I. NMR characterization of the interaction between Bcl-x L and the BH3-like motif of hepatitis B virus X protein. Biochem Biophys Res Commun 2019; 518:445-450. [PMID: 31439373 DOI: 10.1016/j.bbrc.2019.08.036] [Citation(s) in RCA: 3] [Impact Index Per Article: 0.6] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/05/2019] [Accepted: 08/07/2019] [Indexed: 01/10/2023]
Abstract
Hepatitis B virus X protein (HBx) possesses a BH3-like motif that directly interacts with the anti-apoptotic proteins, Bcl-2 and Bcl-xL. Here we report the interaction between the HBx BH3-like motif and Bcl-xL, as revealed by nuclear magnetic resonance spectroscopy. Our results showed that this motif binds to the common BH3-binding hydrophobic groove on the surface of Bcl-xL, with a binding affinity of 89 μM. Furthermore, we examined the role of the tryptophan residue (Trp120) in this motif in Bcl-xL binding using three mutants. The W120A mutant showed weaker binding affinity (294 μM) to Bcl-xL, whereas the W120L and W120F mutants exhibited almost equivalent binding affinity to the wild-type. These results indicate that the bulky hydrophobic residues are important for Bcl-xL binding. The findings will be helpful in understanding the apoptosis networks between viral proteins and host factors.
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Affiliation(s)
- Hideki Kusunoki
- Department of Safety Research on Blood and Biological Products, National Institute of Infectious Diseases, 4-7-1 Gakuen, Musashi-Murayama, Tokyo, 208-0011, Japan.
| | - Toshiyuki Tanaka
- Graduate School of Life and Environmental Sciences, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8572, Japan; Life Science Center, Tsukuba Advanced Research Alliance, University of Tsukuba, 1-1-1 Tennodai, Tsukuba, Ibaraki, 305-8577, Japan
| | - Toshiyuki Kohno
- Department of Medical Informatics, Research and Development Center for Medical Education, Kitasato University School of Medicine, 1-15-1 Kitasato, Minami-ku, Sagamihara, Kanagawa, 252-0374, Japan
| | - Hirokazu Kimura
- Department of Health Science, Gunma Paz University Graduate School of Health Science, 1-7-1 Tonyamachi, Takasaki, Gunma, 370-0006, Japan
| | - Kazuo Hosoda
- Department of Molecular Science, Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma, 376-8515, Japan
| | - Kaori Wakamatsu
- Department of Molecular Science, Graduate School of Science and Technology, Gunma University, 1-5-1 Tenjin-cho, Kiryu, Gunma, 376-8515, Japan
| | - Isao Hamaguchi
- Department of Safety Research on Blood and Biological Products, National Institute of Infectious Diseases, 4-7-1 Gakuen, Musashi-Murayama, Tokyo, 208-0011, Japan.
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11
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Lee B, Min JA, Nashed A, Lee SO, Yoo JC, Chi SW, Yi GS. A novel mechanism of irinotecan targeting MDM2 and Bcl-xL. Biochem Biophys Res Commun 2019; 514:518-523. [PMID: 31056264 DOI: 10.1016/j.bbrc.2019.04.009] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/27/2019] [Accepted: 04/02/2019] [Indexed: 11/26/2022]
Abstract
Irinotecan is a strong anticancer drug whose mechanism of action has been reported only for the inhibition of DNA topoisomerase I (Topo I) through its active metabolite SN-38. In this study, we present a new mechanism of Irinotecan which inhibits the activities of MDM2, an E3 ligase of tumour suppressor p53, and Bcl-xL, an anti-apoptotic protein, through direct binding. In our structure modelling study, Irinotecan could fit to the binding sites of MDM2 and Bcl-xL for their known drugs, Nutlin-3 and ABT-737, with a better binding affinity than to Topo I. The direct binding of Irinotecan to both proteins was confirmed through a NMR study. We further showed that Irinotecan increased the amount of p53 only in the presence of MDM2 and inhibited the physical interaction of Bcl-xL with Bim, a core pro-apoptotic protein. In addition, we demonstrated that Irinotecan induced the down regulation of proliferation and strong G2/M arrest in HCT116 colon cancer cells shortly after treatment. Collectively, we suggest a new mechanism of action for Irinotecan as a dual target inhibitor of MDM2 and Bcl-xL facilitating the anticancer activities mediated by p53 and Bcl-xL interaction partners.
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Affiliation(s)
- Boah Lee
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, South Korea
| | - Jeong A Min
- Disease Target Structure Research Center, KRIBB, Daejeon, 34141, South Korea; Department of Proteome Structural Biology, KRIBB School of Bioscience, Korea University of Science and Technology, Daejeon, 34113, South Korea
| | - Abdullateef Nashed
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, South Korea
| | - Sang-Ok Lee
- Disease Target Structure Research Center, KRIBB, Daejeon, 34141, South Korea
| | - Jae Cheal Yoo
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, South Korea
| | - Seung-Wook Chi
- Disease Target Structure Research Center, KRIBB, Daejeon, 34141, South Korea; Department of Proteome Structural Biology, KRIBB School of Bioscience, Korea University of Science and Technology, Daejeon, 34113, South Korea.
| | - Gwan-Su Yi
- Department of Bio and Brain Engineering, Korea Advanced Institute of Science and Technology (KAIST), Daejeon, 34141, South Korea.
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12
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Yoon MK, Kim BY, Lee JY, Ha JH, Kim SA, Lee DH, Lee MS, Lee MK, Choi JS, Cho JH, Kim JH, Kim S, Song J, Park SG, Park BC, Bae KH, Choi SU, Chi SW. Cytoplasmic pro-apoptotic function of the tumor suppressor p73 is mediated through a modified mode of recognition of the anti-apoptotic regulator Bcl-X L. J Biol Chem 2018; 293:19546-19558. [PMID: 30429221 DOI: 10.1074/jbc.ra118.003061] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 03/28/2018] [Revised: 10/26/2018] [Indexed: 12/15/2022] Open
Abstract
In response to genotoxic stress, the tumor suppressor protein p73 induces apoptosis and cell cycle arrest. Despite extensive studies on p73-mediated apoptosis, little is known about the cytoplasmic apoptotic function of p73. Here, using H1299 lung cancer cells and diverse biochemical approaches, including colony formation, DNA fragmentation, GST pulldown, and apoptosis assays along with NMR spectroscopy, we show that p73 induces transcription-independent apoptosis via its transactivation domain (TAD) through a mitochondrial pathway and that this apoptosis is mediated by the interaction between p73-TAD and the anti-apoptotic protein B-cell lymphoma-extra large (Bcl-XL or BCL2L1). This binding disrupted an interaction between Bcl-XL and the pro-apoptotic protein BH3-interacting domain death agonist (Bid). In particular, we found that a 16-mer p73-TAD peptide motif (p73-TAD16) mediates transcription-independent apoptosis, accompanied by cytochrome c release from the mitochondria, by interacting with Bcl-XL Interestingly, the structure of the Bcl-XL-p73-TAD16 peptide complex revealed a novel mechanism of Bcl-XL recognition by p73-TAD. We observed that the α-helical p73-TAD16 peptide binds to a noncanonical site in Bcl-XL, comprising the BH1, BH2, and BH3 domains in an orientation opposite to those of pro-apoptotic BH3 peptides. Taken together, our results indicate that the cytoplasmic apoptotic function of p73 is mediated through a noncanonical mode of Bcl-XL recognition. This finding sheds light on a critical transcription-independent, p73-mediated mechanism for apoptosis induction, which has potential implications for anticancer therapy.
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Affiliation(s)
- Mi-Kyung Yoon
- From the Disease Target Structure Research Center and
| | - Bu-Yeon Kim
- the Bio & Drug Discovery Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea, and
| | - Ji-Young Lee
- the Bio & Drug Discovery Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea, and
| | - Ji-Hyang Ha
- From the Disease Target Structure Research Center and
| | - Sung Ah Kim
- From the Disease Target Structure Research Center and.,the KRIBB School of Bioscience, Korea University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Dong-Hwa Lee
- From the Disease Target Structure Research Center and
| | - Min-Sung Lee
- From the Disease Target Structure Research Center and.,the KRIBB School of Bioscience, Korea University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Mi-Kyung Lee
- From the Disease Target Structure Research Center and
| | - Jin Sun Choi
- From the Disease Target Structure Research Center and
| | - Jin Hwa Cho
- From the Disease Target Structure Research Center and
| | - Jeong-Hoon Kim
- From the Disease Target Structure Research Center and.,the KRIBB School of Bioscience, Korea University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Sunhong Kim
- From the Disease Target Structure Research Center and.,the KRIBB School of Bioscience, Korea University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Jaewhan Song
- the Department of Biochemistry, Yonsei University, Seoul 03722, Republic of Korea
| | - Sung Goo Park
- From the Disease Target Structure Research Center and.,the KRIBB School of Bioscience, Korea University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Byoung Chul Park
- From the Disease Target Structure Research Center and.,the KRIBB School of Bioscience, Korea University of Science and Technology, Daejeon 34113, Republic of Korea
| | - Kwang-Hee Bae
- the KRIBB School of Bioscience, Korea University of Science and Technology, Daejeon 34113, Republic of Korea.,the Metabolic Regulation Research Center, KRIBB, Daejeon 34141, Republic of Korea
| | - Sang Un Choi
- the Bio & Drug Discovery Division, Korea Research Institute of Chemical Technology, Daejeon 34114, Republic of Korea, and
| | - Seung-Wook Chi
- From the Disease Target Structure Research Center and .,the KRIBB School of Bioscience, Korea University of Science and Technology, Daejeon 34113, Republic of Korea
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13
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Chae H, Kwak DK, Lee MK, Chi SW, Kim KB. Solid-state nanopore analysis on conformation change of p53TAD-MDM2 fusion protein induced by protein-protein interaction. NANOSCALE 2018; 10:17227-17235. [PMID: 30191243 DOI: 10.1039/c8nr06423g] [Citation(s) in RCA: 13] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [MESH Headings] [Track Full Text] [Subscribe] [Scholar Register] [Indexed: 06/08/2023]
Abstract
Although protein-protein interactions (PPIs) are emerging therapeutic targets for human diseases, development of high-throughput screening (HTS) technologies against PPI targets remains challenging. In this study, we propose a protein complex structure to effectively detect conformational changes of protein resulting from PPI using solid-state nanopore for a novel, widely-applicable drug screening method against various PPI targets. To effectively detect conformational changes resulting from PPI, we designed a fusion protein MLP (MDM2-linker-p53TAD), where p53TAD and MDM2 are connected by a 16 amino acid linker. The globular conformation of MLP exhibited a single-peak translocation event, whereas the dumbbell-like conformation of nutlin-3-bound MLP revealed as a double-peak signal. The proportion of double-peak to single-peak signals increased from 9.3% to 23.0% as nutlin-3 concentration increased. The translocation kinetics of the two different MLP conformations with varied applied voltage were analyzed. Further, the fractional current of the intra-peak of the double-peak signal was analyzed, probing the structure of our designed protein complex. This approach of nanopore sensing may be extendedly employed in screening of PPI inhibitors and protein conformation studies.
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Affiliation(s)
- Hongsik Chae
- Department of Materials Science and Engineering, Seoul National University, Seoul 08826, Korea.
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14
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Kim DH, Wright A, Han KH. An NMR study on the intrinsically disordered core transactivation domain of human glucocorticoid receptor. BMB Rep 2018; 50:522-527. [PMID: 28946939 PMCID: PMC5683822 DOI: 10.5483/bmbrep.2017.50.10.152] [Citation(s) in RCA: 9] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/07/2017] [Indexed: 01/30/2023] Open
Abstract
A large number of transcriptional activation domains (TADs) are intrinsically unstructured, meaning they are devoid of a three-dimensional structure. The fact that these TADs are transcriptionally active without forming a 3-D structure raises the question of what features in these domains enable them to function. One of two TADs in human glucocorticoid receptor (hGR) is located at its N-terminus and is responsible for ~70% of the transcriptional activity of hGR. This 58-residue intrinsically-disordered TAD, named tau1c in an earlier study, was shown to form three helices under trifluoroethanol, which might be important for its activity. We carried out heteronuclear multi-dimensional NMR experiments on hGR tau1c in a more physiological aqueous buffer solution and found that it forms three helices that are ~30% pre-populated. Since pre-populated helices in several TADs were shown to be key elements for transcriptional activity, the three pre-formed helices in hGR tau1c delineated in this study should be critical determinants of the transcriptional activity of hGR. The presence of pre-structured helices in hGR tau1c strongly suggests that the existence of pre-structured motifs in target-unbound TADs is a very broad phenomenon.
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Affiliation(s)
- Do-Hyoung Kim
- Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Korea
| | - Anthony Wright
- Clinical Research Center, Department of Laboratory Medicine, Karolinska Institutet, Stockholm, Sweden
| | - Kyou-Hoon Han
- Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Korea; Department of Nano and Bioinformatics, University of Science and Technology, Daejeon 34113, Korea
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15
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Alaee M, Padda A, Mehrabani V, Churchill L, Pasdar M. The physical interaction of p53 and plakoglobin is necessary for their synergistic inhibition of migration and invasion. Oncotarget 2018; 7:26898-915. [PMID: 27058623 PMCID: PMC5042024 DOI: 10.18632/oncotarget.8616] [Citation(s) in RCA: 4] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/11/2015] [Accepted: 03/14/2016] [Indexed: 01/15/2023] Open
Abstract
Plakoglobin (PG) is a paralog of β-catenin with similar adhesive, but contrasting signalling functions. Although β-catenin has well-known oncogenic function, PG generally acts as a tumor/metastasis suppressor by mechanisms that are just beginning to be deciphered. Previously, we showed that PG interacted with wild type (WT) and a number of mutant p53s, and that its tumor/metastasis suppressor activity may be mediated, at least partially, by this interaction. Here, carcinoma cell lines deficient in both p53 and PG (H1299), or expressing mutant p53 in the absence of PG (SCC9), were transfected with expression constructs encoding WT and different fragments and deletions of p53 and PG, individually or in pairs. Transfectants were characterized for their in vitro growth, migratory and invasive properties and for mapping the interacting domain of p53 and PG. We showed that when coexpressed, p53-WT and PG-WT cooperated to decrease growth, and acted synergistically to significantly reduce cell migration and invasion. The DNA-binding domain of p53 and C-terminal domain of PG mediated p53/PG interaction, and furthermore, the C-terminus of PG played a central role in the inhibition of invasion in association with p53.
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Affiliation(s)
- Mahsa Alaee
- Department of Oncology, University of Alberta, Edmonton, AB, T6G1Z2, Canada
| | - Amarjot Padda
- Department of Oncology, University of Alberta, Edmonton, AB, T6G1Z2, Canada
| | - Vahedah Mehrabani
- Department of Oncology, University of Alberta, Edmonton, AB, T6G1Z2, Canada
| | - Lucas Churchill
- Department of Oncology, University of Alberta, Edmonton, AB, T6G1Z2, Canada
| | - Manijeh Pasdar
- Department of Oncology, University of Alberta, Edmonton, AB, T6G1Z2, Canada
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16
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Yeo KJ, Jee JG, Hwang E, Kim EH, Jeon YH, Cheong HK. Interaction between human angiogenin and the p53 TAD2 domain and its implication for inhibitor discovery. FEBS Lett 2017; 591:3916-3925. [PMID: 29105754 DOI: 10.1002/1873-3468.12899] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.9] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/28/2017] [Revised: 10/23/2017] [Accepted: 10/28/2017] [Indexed: 11/10/2022]
Abstract
Interaction between angiogenin and the p53 TAD2 domain in cancer cells can inhibit the function of the p53 tumor suppressor and promote cell survival. Based on a model structure using NMR and mutational analysis, positively charged 31 RRR33 and 50 KRSIK54 motifs of human angiogenin were identified as p53-binding sites that could interact with negatively charged D48/E51 and E56 residues of the p53 TAD2 domain, respectively. These results suggest that 31 RRR33 and 50 KRSIK54 motifs of human angiogenin might play a critical role in the regulation of p53-mediated apoptosis and angiogenesis in cancer cells. This study identifies potential target sites for screening angiogenin-specific inhibitors that could not only inhibit p53 binding but could also simultaneously inhibit cell binding, internalization, DNA binding, and nuclear translocation of human angiogenin.
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Affiliation(s)
- Kwon Joo Yeo
- Protein Structure Group, Korea Basic Science Institute, Ochang, Chungbuk, Korea.,College of Pharmacy, Korea University, Sejong, Korea
| | - Jun-Goo Jee
- College of Pharmacy, Kyungpook National University, Daegu, Korea
| | - Eunha Hwang
- Protein Structure Group, Korea Basic Science Institute, Ochang, Chungbuk, Korea
| | - Eun-Hee Kim
- Protein Structure Group, Korea Basic Science Institute, Ochang, Chungbuk, Korea
| | - Young Ho Jeon
- College of Pharmacy, Korea University, Sejong, Korea
| | - Hae-Kap Cheong
- Protein Structure Group, Korea Basic Science Institute, Ochang, Chungbuk, Korea
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17
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Kleemann M, Bereuther J, Fischer S, Marquart K, Hänle S, Unger K, Jendrossek V, Riedel CU, Handrick R, Otte K. Investigation on tissue specific effects of pro-apoptotic micro RNAs revealed miR-147b as a potential biomarker in ovarian cancer prognosis. Oncotarget 2017; 8:18773-18791. [PMID: 27821806 PMCID: PMC5386646 DOI: 10.18632/oncotarget.13095] [Citation(s) in RCA: 19] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/04/2016] [Accepted: 10/27/2016] [Indexed: 11/25/2022] Open
Abstract
The development and progression of cancer can be ascribed to imbalances in gene regulation leading to aberrant cellular behavior. The loss of micro RNAs (miRNAs) exhibiting tumor-suppressive function has been demonstrated to be often causative for uncontrolled cell proliferation, migration or tissue infiltration. The installation of de novo tumor suppressive function by using pro-apoptotic miRNAs might be a promising therapeutic approach. In addition, there is a great demand for novel biomarkers for the prognosis of cancer, which prompted us to transfer a high content miRNA screening initially performed to identify bioprocess relevant miRNAs in Chinese hamster ovary (CHO) cells to human cancer cell lines . Analysis of screened miRNAs exhibiting strongest pro-apoptotic effects discovered globally and cross-species active candidates. The recovery rate of apoptosis inducing miRNAs was highest in the human ovarian carcinoma cell line SKOV3. Focusing on ovarian cell lines miR-1912, miR-147b and miR-3073a showed significant apoptosis induction in cell lines with different genetic background (SKOV3p53null, OVCAR3p53R248Q, TOV21G, TOV112Dp53R175H, A2780, A2780-cisp53K351N) alone and additive effects in combination with carboplatin. While expression analysis revealed a low endogenous expression of miR-1912 and miR-147b in SKOV3, miRNA expression was highly upregulated upon apoptosis induction using chemotherapeutics. Ectopic introduction of these miRNAs lead to enhanced activation of caspase-dependent death signaling and an induction of the pro-apoptotic proteins Bak1 and Bax and a reduced expression of Bcl2 and Bcl-xL. Finally, analysis of The Cancer Genome Atlas data revealed the expression of hsa-miR-147b-5p to show a positive influence on the median survival of ovarian cancer patients.
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Affiliation(s)
- Michael Kleemann
- Institute of Applied Biotechnology, University of Applied Sciences Biberach, 88400 Biberach, Germany.,University of Ulm, Faculty of Medicine, 89079 Ulm, Germany
| | - Jeremias Bereuther
- Institute of Applied Biotechnology, University of Applied Sciences Biberach, 88400 Biberach, Germany
| | - Simon Fischer
- Boehringer Ingelheim Pharma GmbH and Co.KG, BP Process Development Germany, 88400 Biberach, Germany
| | - Kim Marquart
- Institute of Applied Biotechnology, University of Applied Sciences Biberach, 88400 Biberach, Germany
| | - Simon Hänle
- Institute of Applied Biotechnology, University of Applied Sciences Biberach, 88400 Biberach, Germany
| | - Kristian Unger
- Research Unit Radiation Cytogenetics, Helmholtz Zentrum München, 85764 Neuherberg, Germany
| | - Verena Jendrossek
- Institute of Cell Biology (Cancer Research), University of Duisburg-Essen, Medical School, 45122 Essen, Germany
| | | | - René Handrick
- Institute of Applied Biotechnology, University of Applied Sciences Biberach, 88400 Biberach, Germany
| | - Kerstin Otte
- Institute of Applied Biotechnology, University of Applied Sciences Biberach, 88400 Biberach, Germany
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18
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Kim D, Lee C, Lee S, Kim K, Han JJ, Cha E, Lim J, Cho Y, Hong S, Han K. The Mechanism of p53 Rescue by SUSP4. Angew Chem Int Ed Engl 2017. [DOI: 10.1002/ange.201607819] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/10/2022]
Affiliation(s)
- Do‐Hyoung Kim
- Genome Editing Research Center Korea Research Institute of Bioscience and Biotechnology 125, Gwahak-ro, Yuseong-gu Daejeon 34141 Korea
| | - Chewook Lee
- Genome Editing Research Center Korea Research Institute of Bioscience and Biotechnology 125, Gwahak-ro, Yuseong-gu Daejeon 34141 Korea
| | - Si‐Hyung Lee
- Genome Editing Research Center Korea Research Institute of Bioscience and Biotechnology 125, Gwahak-ro, Yuseong-gu Daejeon 34141 Korea
| | - Kyung‐Tae Kim
- Molecular Epidemology Branch Research Institute National Cancer Center 323 Ilsandong-gu, Goyang-si Gyeonggi-do 10408 Korea
| | - Joan J. Han
- Genome Editing Research Center Korea Research Institute of Bioscience and Biotechnology 125, Gwahak-ro, Yuseong-gu Daejeon 34141 Korea
- College of Human Medicine Michigan State University East Lansing MI 48824 USA
| | - Eun‐Ji Cha
- Genome Editing Research Center Korea Research Institute of Bioscience and Biotechnology 125, Gwahak-ro, Yuseong-gu Daejeon 34141 Korea
| | - Ji‐Eun Lim
- Genome Editing Research Center Korea Research Institute of Bioscience and Biotechnology 125, Gwahak-ro, Yuseong-gu Daejeon 34141 Korea
| | - Ye‐Jin Cho
- Genome Editing Research Center Korea Research Institute of Bioscience and Biotechnology 125, Gwahak-ro, Yuseong-gu Daejeon 34141 Korea
- Department of Bioinformatics University of Science and Technology 217, Gajeong-ro, Yuseong-gu Daejoen 34113 Korea
| | - Seung‐Hee Hong
- Division of Food Science and Culinary Art, Food and Nutrition Major Shinhan University 95 Hoam-ro, Uijeongbu-si Gyeonggi-do 11644 Korea
| | - Kyou‐Hoon Han
- Genome Editing Research Center Korea Research Institute of Bioscience and Biotechnology 125, Gwahak-ro, Yuseong-gu Daejeon 34141 Korea
- Department of Bioinformatics University of Science and Technology 217, Gajeong-ro, Yuseong-gu Daejoen 34113 Korea
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19
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Lee C, Kim DH, Lee SH, Su J, Han KH. Structural investigation on the intrinsically disordered N-terminal region of HPV16 E7 protein. BMB Rep 2017; 49:431-6. [PMID: 27418281 PMCID: PMC5070730 DOI: 10.5483/bmbrep.2016.49.8.021] [Citation(s) in RCA: 14] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 02/02/2016] [Indexed: 11/28/2022] Open
Abstract
Human papillomavirus (HPV) is the major cause of cervical cancer, a deadly threat to millions of females. The early oncogene product (E7) of the high-risk HPV16 is the primary agent associated with HPV-related cervical cancers. In order to understand how E7 contributes to the transforming activity, we investigated the structural features of the flexible N-terminal region (46 residues) of E7 by carrying out N-15 heteronuclear NMR experiments and replica exchange molecular dynamics simulations. Several NMR parameters as well as simulation ensemble structures indicate that this intrinsically disordered region of E7 contains two transient (10-20% populated) helical pre-structured motifs that overlap with important target binding moieties such as an E2F-mimic motif and a pRb-binding LXCXE segment. Presence of such target-binding motifs in HPV16 E7 provides a reasonable explanation for its promiscuous target-binding behavior associated with its transforming activity. [BMB Reports 2016; 49(8): 431-436]
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Affiliation(s)
- Chewook Lee
- Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Korea
| | - Do-Hyoung Kim
- Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Korea
| | - Si-Hyung Lee
- Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141, Korea
| | - Jiulong Su
- Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141; Department of Bioinformatics, University of Science and Technology, Daejeon 34113, Korea
| | - Kyou-Hoon Han
- Genome Editing Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 34141; Department of Bioinformatics, University of Science and Technology, Daejeon 34113, Korea
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20
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Kim D, Lee C, Lee S, Kim K, Han JJ, Cha E, Lim J, Cho Y, Hong S, Han K. The Mechanism of p53 Rescue by SUSP4. Angew Chem Int Ed Engl 2016; 56:1278-1282. [DOI: 10.1002/anie.201607819] [Citation(s) in RCA: 8] [Impact Index Per Article: 1.0] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 08/11/2016] [Revised: 09/25/2016] [Indexed: 11/06/2022]
Affiliation(s)
- Do‐Hyoung Kim
- Genome Editing Research Center Korea Research Institute of Bioscience and Biotechnology 125, Gwahak-ro, Yuseong-gu Daejeon 34141 Korea
| | - Chewook Lee
- Genome Editing Research Center Korea Research Institute of Bioscience and Biotechnology 125, Gwahak-ro, Yuseong-gu Daejeon 34141 Korea
| | - Si‐Hyung Lee
- Genome Editing Research Center Korea Research Institute of Bioscience and Biotechnology 125, Gwahak-ro, Yuseong-gu Daejeon 34141 Korea
| | - Kyung‐Tae Kim
- Molecular Epidemology Branch Research Institute National Cancer Center 323 Ilsandong-gu, Goyang-si Gyeonggi-do 10408 Korea
| | - Joan J. Han
- Genome Editing Research Center Korea Research Institute of Bioscience and Biotechnology 125, Gwahak-ro, Yuseong-gu Daejeon 34141 Korea
- College of Human Medicine Michigan State University East Lansing MI 48824 USA
| | - Eun‐Ji Cha
- Genome Editing Research Center Korea Research Institute of Bioscience and Biotechnology 125, Gwahak-ro, Yuseong-gu Daejeon 34141 Korea
| | - Ji‐Eun Lim
- Genome Editing Research Center Korea Research Institute of Bioscience and Biotechnology 125, Gwahak-ro, Yuseong-gu Daejeon 34141 Korea
| | - Ye‐Jin Cho
- Genome Editing Research Center Korea Research Institute of Bioscience and Biotechnology 125, Gwahak-ro, Yuseong-gu Daejeon 34141 Korea
- Department of Bioinformatics University of Science and Technology 217, Gajeong-ro, Yuseong-gu Daejoen 34113 Korea
| | - Seung‐Hee Hong
- Division of Food Science and Culinary Art, Food and Nutrition Major Shinhan University 95 Hoam-ro, Uijeongbu-si Gyeonggi-do 11644 Korea
| | - Kyou‐Hoon Han
- Genome Editing Research Center Korea Research Institute of Bioscience and Biotechnology 125, Gwahak-ro, Yuseong-gu Daejeon 34141 Korea
- Department of Bioinformatics University of Science and Technology 217, Gajeong-ro, Yuseong-gu Daejoen 34113 Korea
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21
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Structural insight into the inhibition of carbonic anhydrase by the COX-2-selective inhibitor polmacoxib (CG100649). Biochem Biophys Res Commun 2016; 478:1-6. [DOI: 10.1016/j.bbrc.2016.07.114] [Citation(s) in RCA: 13] [Impact Index Per Article: 1.6] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/20/2016] [Accepted: 07/25/2016] [Indexed: 11/23/2022]
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22
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Singh K, Briggs JM. Functional Implications of the spectrum of BCL2 mutations in Lymphoma. MUTATION RESEARCH-REVIEWS IN MUTATION RESEARCH 2016; 769:1-18. [PMID: 27543313 DOI: 10.1016/j.mrrev.2016.06.001] [Citation(s) in RCA: 18] [Impact Index Per Article: 2.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Subscribe] [Scholar Register] [Received: 01/06/2016] [Revised: 06/09/2016] [Accepted: 06/12/2016] [Indexed: 12/12/2022]
Abstract
Mutations in the translocated BCL2 gene are often detected in diffuse large B-cell lymphomas (DLBCLs), indicating both their significance and pervasiveness. Large series genome sequencing of more than 200 DLBCLs has identified frequent BCL2 mutations clustered in the exons coding for the BH4 domain and the folded loop domain (FLD) of the protein. However, BCL2 mutations are mostly contemplated to represent bystander events with negligible functional impact on the pathogenesis of DLBCL. BCL2 arbitrates apoptosis through a classic interaction between its hydrophobic groove forming BH1-3 domains and the BH3 domain of pro-apoptotic members of the BCL2 family. The effects of mutations are mainly determined by the ability of the mutated BCL2 to mediate apoptosis by this inter-member protein binding. Nevertheless, BCL2 regulates diverse non-canonical pathways that are unlikely to be explained by canonical interactions. In this review, first, we identify recurrent missense mutations in the BH4 domain and the FLD reported in independent lymphoma sequencing studies. Second, we discuss the probable consequences of mutations on the binding ability of BCL2 to non-BCL2 family member proteins crucial for 1) maintaining mitochondrial energetics and calcium hemostasis such as VDAC, IP3R, and RyR and 2) oncogenic pathways implicated in the acquisition of the 'hallmarks of cancer' such as SOD, Raf-1, NFAT, p53, HIF-1α, and gelsolin. The study also highlights the likely ramifications of mutations on binding of BCL2 antagonists and BH3 profiling. Based on our analysis, we believe that an in-depth focus on BCL2 interactions mediated by these domains is warranted to elucidate the functional significance of missense mutations in DLBCL. In summary, we provide an extensive overview of the pleiotropic functions of BCL2 mediated by its physical binding interaction with other proteins and the various ways BCL2 mutations would affect the normal function of the cell leading to the development of DLBCL.
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Affiliation(s)
- Khushboo Singh
- Department of Biology and Biochemistry, University of Houston, Houston, TX 77204-5001, USA
| | - James M Briggs
- Department of Biology and Biochemistry, University of Houston, Houston, TX 77204-5001, USA.
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23
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Tajeddine N. How do reactive oxygen species and calcium trigger mitochondrial membrane permeabilisation? Biochim Biophys Acta Gen Subj 2016; 1860:1079-88. [DOI: 10.1016/j.bbagen.2016.02.013] [Citation(s) in RCA: 59] [Impact Index Per Article: 7.4] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/29/2015] [Revised: 02/16/2016] [Accepted: 02/22/2016] [Indexed: 10/22/2022]
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24
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Major apoptotic mechanisms and genes involved in apoptosis. Tumour Biol 2016; 37:8471-86. [PMID: 27059734 DOI: 10.1007/s13277-016-5035-9] [Citation(s) in RCA: 362] [Impact Index Per Article: 45.3] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2015] [Accepted: 03/28/2016] [Indexed: 12/12/2022] Open
Abstract
As much as the cellular viability is important for the living organisms, the elimination of unnecessary or damaged cells has the opposite necessity for the maintenance of homeostasis in tissues, organs and the whole organism. Apoptosis, a type of cell death mechanism, is controlled by the interactions between several molecules and responsible for the elimination of unwanted cells from the body. Apoptosis can be triggered by intrinsically or extrinsically through death signals from the outside of the cell. Any abnormality in apoptosis process can cause various types of diseases from cancer to auto-immune diseases. Different gene families such as caspases, inhibitor of apoptosis proteins, B cell lymphoma (Bcl)-2 family of genes, tumor necrosis factor (TNF) receptor gene superfamily, or p53 gene are involved and/or collaborate in the process of apoptosis. In this review, we discuss the basic features of apoptosis and have focused on the gene families playing critical roles, activation/inactivation mechanisms, upstream/downstream effectors, and signaling pathways in apoptosis on the basis of cancer studies. In addition, novel apoptotic players such as miRNAs and sphingolipid family members in various kind of cancer are discussed.
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25
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Shin JS, Ha JH, Lee DH, Ryu KS, Bae KH, Park BC, Park SG, Yi GS, Chi SW. Structural convergence of unstructured p53 family transactivation domains in MDM2 recognition. Cell Cycle 2015; 14:533-43. [PMID: 25591003 DOI: 10.1080/15384101.2014.998056] [Citation(s) in RCA: 20] [Impact Index Per Article: 2.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/08/2023] Open
Abstract
The p53, p63, and p73 proteins belong to the p53 family of transcription factors, which play key roles in tumor suppression. Although the transactivation domains (TADs) of the p53 family are intrinsically disordered, these domains are commonly involved in the regulatory interactions with mouse double minute 2 (MDM2). In this study, we determined the solution structure of the p73TAD peptide in complex with MDM2 using NMR spectroscopy and biophysically characterized the interactions between the p53 family TAD peptides and MDM2. In combination with mutagenesis data, the complex structures revealed remarkably close mimicry of the MDM2 recognition mechanism among the p53 family TADs. Upon binding with MDM2, the intrinsically disordered p73TAD and p63TAD peptides adopt an amphipathic α-helical conformation, which is similar to the conformation of p53TAD, although the α-helical content induced by MDM2 binding varies. With isothermal titration calorimetry (ITC) and circular dichroism (CD) data, our biophysical characterization showed that p73TAD resembles p53TAD more closely than p63TAD in terms of helical stability, MDM2 binding affinity, and phosphorylation effects on MDM2 binding. Therefore, our structural information may be useful in establishing alternative anticancer strategies that exploit the activation of the p73 pathway against human tumors bearing p53 mutations.
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Affiliation(s)
- Jae-Sun Shin
- a Structural Biology & Nanopore Research Laboratory; Functional Genomics Research Center; KRIBB ; Daejeon , Republic of Korea
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Abstract
p73 is a structural and functional homologue of the p53 tumor suppressor protein. Like p53, p73 induces apoptosis and cell cycle arrest and transactivates p53-responsive genes, conferring its tumor suppressive activity. In addition, p73 has unique roles in neuronal development and differentiation. The importance of p73-induced apoptosis lies in its capability to substitute the pro-apoptotic activity of p53 in various human cancer cells in which p53 is mutated or inactive. Despite the great importance of p73-induced apoptosis in cancer therapy, little is known about the molecular basis of p73-induced apoptosis. In this review, we discuss the p73 structures reported to date, detailed structural comparisons between p73 and p53, and current understanding of the transcription-dependent and -independent mechanisms of p73-induced apoptosis. [BMB Reports 2015; 48(2): 81-90]
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Affiliation(s)
- Mi-Kyung Yoon
- Structural Biology & Nanopore Research Laboratory, Functional Genomics Research Center, KRIBB, Daejeon 305-806, Korea
| | - Ji-Hyang Ha
- Structural Biology & Nanopore Research Laboratory, Functional Genomics Research Center, KRIBB, Daejeon 305-806, Korea
| | - Min-Sung Lee
- Structural Biology & Nanopore Research Laboratory, Functional Genomics Research Center, KRIBB, Daejeon 305-806; Department of Bio-Analytical Science, University of Science and Technology, Daejeon 305-350, Korea
| | - Seung-Wook Chi
- Structural Biology & Nanopore Research Laboratory, Functional Genomics Research Center, KRIBB, Daejeon 305-806; Department of Bio-Analytical Science, University of Science and Technology, Daejeon 305-350, Korea
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27
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Min B, Ryu J, Chi SW, Yi GS. Ubiquitination-dependent degradation of p73 by the mitochondrial E3 ubiquitin ligase Hades. Biochem Biophys Res Commun 2015; 467:316-21. [PMID: 26435500 DOI: 10.1016/j.bbrc.2015.09.163] [Citation(s) in RCA: 10] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/25/2015] [Accepted: 09/29/2015] [Indexed: 01/05/2023]
Abstract
p73 is a member of the p53 family of transcription factors which plays an essential role in tumor suppression. p73 is associated with the sensitivity of cancer cells to chemotherapy and the prognosis of many cancers. In this study, we showed the ubiquitination-dependent degradation of p73 by the mitochondrial E3 ubiquitin ligase Hades. First, the binding between p73 and Hades was identified by co-immunoprecipitation experiments, and it was found that the Hades RING-finger domain mediates the interaction with p73. Immunofluorescence analysis showed that p73 moves to the mitochondria and colocalizes with Hades during etoposide-induced apoptosis. By performing in vivo and in vitro ubiquitination assays, we observed that the Hades RING-finger domain promotes ubiquitination of p73. Finally, it was shown that SiRNA-mediated depletion of Hades stabilizes p73. Taken together, our results showed that Hades mediates the ubiquitination-dependent degradation of mitochondrial p73 under apoptotic conditions. These findings suggest that Hades-mediated p73 ubiquitination is a novel regulatory mechanism for the exonuclear function of p73.
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Affiliation(s)
- Bumki Min
- Department of Bio and Brain Engineering, KAIST, Daejeon 305-701, Republic of Korea
| | - Jiwon Ryu
- Department of Bio and Brain Engineering, KAIST, Daejeon 305-701, Republic of Korea
| | - Seung-Wook Chi
- Structural Biology & Nanopore Research Laboratory, KRIBB, Daejeon 305-806, Republic of Korea.
| | - Gwan-Su Yi
- Department of Bio and Brain Engineering, KAIST, Daejeon 305-701, Republic of Korea.
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28
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Narayanan KB, Ali M, Barclay BJ, Cheng QS, D'Abronzo L, Dornetshuber-Fleiss R, Ghosh PM, Gonzalez Guzman MJ, Lee TJ, Leung PS, Li L, Luanpitpong S, Ratovitski E, Rojanasakul Y, Romano MF, Romano S, Sinha RK, Yedjou C, Al-Mulla F, Al-Temaimi R, Amedei A, Brown DG, Ryan EP, Colacci A, Hamid RA, Mondello C, Raju J, Salem HK, Woodrick J, Scovassi AI, Singh N, Vaccari M, Roy R, Forte S, Memeo L, Kim SY, Bisson WH, Lowe L, Park HH. Disruptive environmental chemicals and cellular mechanisms that confer resistance to cell death. Carcinogenesis 2015; 36 Suppl 1:S89-110. [PMID: 26106145 DOI: 10.1093/carcin/bgv032] [Citation(s) in RCA: 24] [Impact Index Per Article: 2.7] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/12/2022] Open
Abstract
Cell death is a process of dying within biological cells that are ceasing to function. This process is essential in regulating organism development, tissue homeostasis, and to eliminate cells in the body that are irreparably damaged. In general, dysfunction in normal cellular death is tightly linked to cancer progression. Specifically, the up-regulation of pro-survival factors, including oncogenic factors and antiapoptotic signaling pathways, and the down-regulation of pro-apoptotic factors, including tumor suppressive factors, confers resistance to cell death in tumor cells, which supports the emergence of a fully immortalized cellular phenotype. This review considers the potential relevance of ubiquitous environmental chemical exposures that have been shown to disrupt key pathways and mechanisms associated with this sort of dysfunction. Specifically, bisphenol A, chlorothalonil, dibutyl phthalate, dichlorvos, lindane, linuron, methoxychlor and oxyfluorfen are discussed as prototypical chemical disruptors; as their effects relate to resistance to cell death, as constituents within environmental mixtures and as potential contributors to environmental carcinogenesis.
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Affiliation(s)
- Kannan Badri Narayanan
- Department of Chemistry and Biochemistry, Yeungnam University, Gyeongsan 712-749, South Korea, Sultan Zainal Abidin University, Malaysia, Plant Biotechnologies Inc, St. Albert AB, Canada, Computer Science Department, Southern Illinois University, Carbondale, IL 62901, USA, Department of Urology, University of California Davis, Sacramento, CA 95817, USA, Department of Pharmacology and Toxicology, University of Vienna, Austria, University of Puerto Rico, Medical Sciences Campus, School of Public Health, Nutrition Program, San Juan Puerto Rico 00936-5067, USA, Department of Anatomy, College of Medicine, Yeungnam University, Daegu, 705-717, South Korea, School of Biomedical Science, The Chinese University Of Hong Kong, Hong Kong, China, Siriraj Center of Excellence for Stem Cell Research, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand, Department of Otolaryngology/Head and Neck Surgery, Head and Neck Cancer Research Division, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA, Department of Pharmaceutical Sciences, Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, WV 26506, USA, Department of Molecular Medicine and Medical Biotechnology, Federico II University of Naples, 80131 Naples, Italy, Department of Molecular and Experimental Medicine, MEM 180, The Scripps Research Institute, La Jolla, CA 92037, USA, Department of Biology, Jackson State University, Jackson, MS 39217, USA, Department of Pathology, Kuwait University, Safat 13110, Kuwait, Department of Experimental and Clinical Medicine, University of Firenze, Firenze, 50134, Italy, Department of Environmental and Radiological Health Sciences, Colorado state University/ Colorado School of Public Health, Fort Collins, CO 80523-1680, USA, Center for Environmental Carcinogenesis and Risk Assessment, Environmental Protection and Health Prevention Agency, Bologna, 40126, Italy, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Se
| | - Manaf Ali
- Sultan Zainal Abidin University, Malaysia
| | | | - Qiang Shawn Cheng
- Computer Science Department, Southern Illinois University, Carbondale, IL 62901, USA
| | - Leandro D'Abronzo
- Department of Urology, University of California Davis, Sacramento, CA 95817, USA
| | | | - Paramita M Ghosh
- Department of Urology, University of California Davis, Sacramento, CA 95817, USA
| | - Michael J Gonzalez Guzman
- University of Puerto Rico, Medical Sciences Campus, School of Public Health, Nutrition Program, San Juan Puerto Rico 00936-5067, USA
| | - Tae-Jin Lee
- Department of Anatomy, College of Medicine, Yeungnam University, Daegu, 705-717, South Korea
| | - Po Sing Leung
- School of Biomedical Science, The Chinese University Of Hong Kong, Hong Kong, China
| | - Lin Li
- School of Biomedical Science, The Chinese University Of Hong Kong, Hong Kong, China
| | - Suidjit Luanpitpong
- Siriraj Center of Excellence for Stem Cell Research, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand
| | - Edward Ratovitski
- Department of Otolaryngology/Head and Neck Surgery, Head and Neck Cancer Research Division, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA
| | - Yon Rojanasakul
- Department of Pharmaceutical Sciences, Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, WV 26506, USA
| | - Maria Fiammetta Romano
- Department of Molecular Medicine and Medical Biotechnology, Federico II University of Naples, 80131 Naples, Italy
| | - Simona Romano
- Department of Molecular Medicine and Medical Biotechnology, Federico II University of Naples, 80131 Naples, Italy
| | - Ranjeet K Sinha
- Department of Molecular and Experimental Medicine, MEM 180, The Scripps Research Institute, La Jolla, CA 92037, USA
| | - Clement Yedjou
- Department of Biology, Jackson State University, Jackson, MS 39217, USA
| | - Fahd Al-Mulla
- Department of Pathology, Kuwait University, Safat 13110, Kuwait
| | | | - Amedeo Amedei
- Department of Experimental and Clinical Medicine, University of Firenze, Firenze, 50134, Italy
| | - Dustin G Brown
- Department of Environmental and Radiological Health Sciences, Colorado state University/ Colorado School of Public Health, Fort Collins, CO 80523-1680, USA
| | - Elizabeth P Ryan
- Department of Environmental and Radiological Health Sciences, Colorado state University/ Colorado School of Public Health, Fort Collins, CO 80523-1680, USA
| | - Annamaria Colacci
- Center for Environmental Carcinogenesis and Risk Assessment, Environmental Protection and Health Prevention Agency, Bologna, 40126, Italy
| | - Roslida A Hamid
- Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Serdang, Selangor 43400, Malaysia
| | - Chiara Mondello
- Institute of Molecular Genetics, National Research Council, Pavia, 27100, Italy
| | - Jayadev Raju
- Toxicology Research Division, Bureau of Chemical Safety Food Directorate, Health Products and Food Branch Health Canada, Ottawa, Ontario, K1A0K9, Canada
| | - Hosni K Salem
- Urology Department, Kasr Al-Ainy School of Medicine, Cairo University, El Manial, Cairo, 12515, Egypt
| | - Jordan Woodrick
- Molecular Oncology Program, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington DC, 20057, USA
| | - A Ivana Scovassi
- Institute of Molecular Genetics, National Research Council, Pavia, 27100, Italy
| | - Neetu Singh
- Advenced Molecular Science Research Centre, King George's Medical University, Lucknow, Uttar Pradesh, 226003, India
| | - Monica Vaccari
- Center for Environmental Carcinogenesis and Risk Assessment, Environmental Protection and Health Prevention Agency, Bologna, 40126, Italy
| | - Rabindra Roy
- Molecular Oncology Program, Lombardi Comprehensive Cancer Center, Georgetown University Medical Center, Washington DC, 20057, USA
| | - Stefano Forte
- Mediterranean Institute of Oncology, Viagrande, 95029, Italy
| | - Lorenzo Memeo
- Mediterranean Institute of Oncology, Viagrande, 95029, Italy
| | - Seo Yun Kim
- Department of Internal Medicine, Korea Cancer Center Hospital, Seoul 139-706, South Korea
| | - William H Bisson
- Environmental and Molecular Toxicology, Environmental Health Science Center, Oregon State University, Corvallis, OR 97331, USA and
| | - Leroy Lowe
- Getting to Know Cancer, Truro, Nova Scotia, Canada
| | - Hyun Ho Park
- Department of Chemistry and Biochemistry, Yeungnam University, Gyeongsan 712-749, South Korea, Sultan Zainal Abidin University, Malaysia, Plant Biotechnologies Inc, St. Albert AB, Canada, Computer Science Department, Southern Illinois University, Carbondale, IL 62901, USA, Department of Urology, University of California Davis, Sacramento, CA 95817, USA, Department of Pharmacology and Toxicology, University of Vienna, Austria, University of Puerto Rico, Medical Sciences Campus, School of Public Health, Nutrition Program, San Juan Puerto Rico 00936-5067, USA, Department of Anatomy, College of Medicine, Yeungnam University, Daegu, 705-717, South Korea, School of Biomedical Science, The Chinese University Of Hong Kong, Hong Kong, China, Siriraj Center of Excellence for Stem Cell Research, Faculty of Medicine Siriraj Hospital, Mahidol University, Bangkok 10700, Thailand, Department of Otolaryngology/Head and Neck Surgery, Head and Neck Cancer Research Division, Johns Hopkins University School of Medicine, Baltimore, MD 21231, USA, Department of Pharmaceutical Sciences, Mary Babb Randolph Cancer Center, West Virginia University, Morgantown, WV 26506, USA, Department of Molecular Medicine and Medical Biotechnology, Federico II University of Naples, 80131 Naples, Italy, Department of Molecular and Experimental Medicine, MEM 180, The Scripps Research Institute, La Jolla, CA 92037, USA, Department of Biology, Jackson State University, Jackson, MS 39217, USA, Department of Pathology, Kuwait University, Safat 13110, Kuwait, Department of Experimental and Clinical Medicine, University of Firenze, Firenze, 50134, Italy, Department of Environmental and Radiological Health Sciences, Colorado state University/ Colorado School of Public Health, Fort Collins, CO 80523-1680, USA, Center for Environmental Carcinogenesis and Risk Assessment, Environmental Protection and Health Prevention Agency, Bologna, 40126, Italy, Faculty of Medicine and Health Sciences, Universiti Putra Malaysia, Se
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29
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Miller Jenkins LM, Feng H, Durell SR, Tagad HD, Mazur SJ, Tropea JE, Bai Y, Appella E. Characterization of the p300 Taz2-p53 TAD2 complex and comparison with the p300 Taz2-p53 TAD1 complex. Biochemistry 2015; 54:2001-10. [PMID: 25753752 DOI: 10.1021/acs.biochem.5b00044] [Citation(s) in RCA: 38] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/29/2022]
Abstract
The p53 tumor suppressor is a critical mediator of the cellular response to stress. The N-terminal transactivation domain of p53 makes protein interactions that promote its function as a transcription factor. Among those cofactors is the histone acetyltransferase p300, which both stabilizes p53 and promotes local chromatin unwinding. Here, we report the nuclear magnetic resonance solution structure of the Taz2 domain of p300 bound to the second transactivation subdomain of p53. In the complex, p53 forms an α-helix between residues 47 and 55 that interacts with the α1-α2-α3 face of Taz2. Mutational analysis indicated several residues in both p53 and Taz2 that are critical for stabilizing the interaction. Finally, further characterization of the complex by isothermal titration calorimetry revealed that complex formation is pH-dependent and releases a bound chloride ion. This study highlights differences in the structures of complexes formed by the two transactivation subdomains of p53 that may be broadly observed and play critical roles in p53 transcriptional activity.
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Affiliation(s)
- Lisa M Miller Jenkins
- †Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Hanqiao Feng
- ‡Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Stewart R Durell
- †Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Harichandra D Tagad
- †Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Sharlyn J Mazur
- †Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Joseph E Tropea
- §Macromolecular Crystallography Laboratory, National Cancer Institute, Frederick, Maryland 21702, United States
| | - Yawen Bai
- ‡Laboratory of Biochemistry and Molecular Biology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, United States
| | - Ettore Appella
- †Laboratory of Cell Biology, National Cancer Institute, National Institutes of Health, Bethesda, Maryland 20892, United States
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Li Y, Li B, Li CJ, Li LJ. Key points of basic theories and clinical practice in rAd-p53 ( Gendicine ™) gene therapy for solid malignant tumors. Expert Opin Biol Ther 2014; 15:437-54. [PMID: 25496374 DOI: 10.1517/14712598.2015.990882] [Citation(s) in RCA: 30] [Impact Index Per Article: 3.0] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 02/05/2023]
Abstract
INTRODUCTION Wild-type p53 gene is an essential cancer suppressor gene which plays an important role in carcinogenesis and malignant progressions. The p53 gene family participates in almost all the key procedures of cancer biology, such as programmed cell death, angiogenesis, metabolism and epithelial-mesenchymal transition. The mutation or functional defects of the p53 gene family are detected in most of the solid malignant tumors, and the restoration of the p53 gene by adenovirus-mediated gene therapy becomes a promising treatment for cancer patients now. AREAS COVERED In the present review, the potential therapeutic effects of recombinant adenovirus p53 rAd-p53 ( Gendicine ™) were reviewed to explore the biological mechanism underlying the adenovirus-mediated p53 gene therapy. Then, the key points of the drug administration were discussed, including the routes of administration, dosage calculation and treatment cycles, based on findings of the preclinical and clinical trials in order to establish a standard treatment for the p53 gene therapy. EXPERT OPINION As an important part of the combined therapy for the cancer patients, the adenovirus-mediated p53 gene therapy was blossomed to be a promising treatment strategy. A new evaluation criteria and guideline for the gene therapy is urgently needed for the further clinical practice.
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Affiliation(s)
- Yi Li
- Sichuan University, West China Hospital of Stomatology, State Key Laboratory of Oral Disease , Chengdu, 610041 , China
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31
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Chi SW. Structural insights into the transcription-independent apoptotic pathway of p53. BMB Rep 2014; 47:167-72. [PMID: 24499665 PMCID: PMC4163879 DOI: 10.5483/bmbrep.2014.47.3.261] [Citation(s) in RCA: 62] [Impact Index Per Article: 6.2] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/26/2013] [Revised: 12/16/2013] [Accepted: 12/30/2013] [Indexed: 11/20/2022] Open
Abstract
Reactivating the p53 pathway in tumors is an important strategy for anticancer therapy. In response to diverse cellular stresses, the tumor suppressor p53 mediates apoptosis in a transcriptionindependent and transcription-dependent manner. Although extensive studies have focused on the transcription-dependent apoptotic pathway of p53, the transcription-independent apoptotic pathway of p53 has only recently been discovered. Molecular interactions between p53 and Bcl-2 family proteins in the mitochondria play an essential role in the transcriptionindependent apoptosis of p53. This review describes the structural basis for the transcription-independent apoptotic pathway of p53 and discusses its potential application to anticancer therapy. [BMB Reports 2014; 47(3): 167-172]
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Affiliation(s)
- Seung-Wook Chi
- Medical Proteomics Research Center, KRIBB, Daejeon 305-806; Department of Bio-Analytical Science, University of Science and Technology, Daejeon 305-350, Korea
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32
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Sorriento D, Del Giudice C, Bertamino A, Ciccarelli M, Gomez-Monterrey I, Campiglia P, Novellino E, Illario M, Trimarco B, De Luca N, Iaccarino G. New small molecules, ISA27 and SM13, inhibit tumour growth inducing mitochondrial effects of p53. Br J Cancer 2014; 112:77-85. [PMID: 25422906 PMCID: PMC4453617 DOI: 10.1038/bjc.2014.577] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Revised: 09/18/2014] [Accepted: 09/24/2014] [Indexed: 11/10/2022] Open
Abstract
BACKGROUND p53 is a transcription factor with tumour suppressor properties, which is able to induce mitochondrial apoptosis independently of its transcriptional activity. We recently synthesised two new compounds (ISA27 and SM13), which block p53-MDM2 interaction and induce apoptosis in p53 wild-type (WT) tumour cells. The aim of this study was to verify the effectiveness of these compounds in tumours carrying a mutated form of p53 gene with no transcriptional activity. METHODS In vitro we evaluated the effectiveness of our compounds in cancer cell lines carrying WT, mutated and null p53 gene. In vivo study was performed in Balb/c nude mice and the mitochondrial-dependent apoptotic signalling was evaluated by western blot. RESULTS Both ISA27 and SM13 reduced cell proliferation and induced apoptosis in vitro in cells carrying either p53 WT or mutated gene, suggesting that its effect is independent from p53 transcriptional activity. On the contrary, SM13 had no effect in a p53 null cell line. In vivo, ISA27 and SM13 induced cancer cell death in a dose-dependent manner through the activation of the mitochondrial-dependent death signalling in p53-mutated cells. In vivo, SM13 reduced tumour growth. CONCLUSIONS Our study proposes SM13 as anticancer compound to use for the treatment of p53-dependent tumours, even in the absence of p53 transcriptional activity.
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Affiliation(s)
- D Sorriento
- 1] Department of Advanced Biomedical Sciences, 'Federico II' University of Naples, Naples 80131, Italy [2] Institute of Biostructure and Bioimaging (IBB) of the Italian National Research Council (CNR), Naples 80145, Italy
| | - C Del Giudice
- Department of Advanced Biomedical Sciences, 'Federico II' University of Naples, Naples 80131, Italy
| | - A Bertamino
- Department of Pharmaceutical Science, Division of BioMedicine, University of Salerno, Salerno 84084, Italy
| | - M Ciccarelli
- Department of Medicine and Surgery, University of Salerno, Salerno 84081, Italy
| | - I Gomez-Monterrey
- Department of Pharmaceutical and Toxicological Chemistry, 'Federico II' University of Naples, Naples 80131, Italy
| | - P Campiglia
- Department of Pharmaceutical Science, Division of BioMedicine, University of Salerno, Salerno 84084, Italy
| | - E Novellino
- Department of Pharmaceutical and Toxicological Chemistry, 'Federico II' University of Naples, Naples 80131, Italy
| | - M Illario
- Department of Translational Medicine, 'Federico II' University of Naples, Naples 80131, Italy
| | - B Trimarco
- Department of Advanced Biomedical Sciences, 'Federico II' University of Naples, Naples 80131, Italy
| | - N De Luca
- Department of Translational Medicine, 'Federico II' University of Naples, Naples 80131, Italy
| | - G Iaccarino
- 1] Department of Medicine and Surgery, University of Salerno, Salerno 84081, Italy [2] IRCCS Multimedica, Milano 20138, Italy
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Okuda M, Nishimura Y. Extended String Binding Mode of the Phosphorylated Transactivation Domain of Tumor Suppressor p53. J Am Chem Soc 2014; 136:14143-52. [DOI: 10.1021/ja506351f] [Citation(s) in RCA: 42] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/26/2022]
Affiliation(s)
- Masahiko Okuda
- Graduate School of Medical
Life Science, Yokohama City University, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan
| | - Yoshifumi Nishimura
- Graduate School of Medical
Life Science, Yokohama City University, 1-7-29 Suehiro-cho, Tsurumi-ku, Yokohama 230-0045, Japan
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Kusunoki H, Tanaka T, Kohno T, Wakamatsu K, Hamaguchi I. Structural characterization of the BH3-like motif of hepatitis B virus X protein. Biochem Biophys Res Commun 2014; 450:741-5. [PMID: 24950407 DOI: 10.1016/j.bbrc.2014.06.042] [Citation(s) in RCA: 11] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/28/2014] [Accepted: 06/10/2014] [Indexed: 01/26/2023]
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The DNA-binding domain mediates both nuclear and cytosolic functions of p53. Nat Struct Mol Biol 2014; 21:535-43. [PMID: 24814347 DOI: 10.1038/nsmb.2829] [Citation(s) in RCA: 64] [Impact Index Per Article: 6.4] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/19/2013] [Accepted: 04/10/2014] [Indexed: 11/09/2022]
Abstract
Under conditions of genotoxic stress, human p53 activates the apoptotic effectors BAX or BAK to result in mitochondrial outer-membrane permeabilization and apoptosis. Antiapoptotic BCL-2 family member BCL-xL opposes this activity by sequestering cytosolic p53 via association with its DNA-binding domain, an interaction enhanced by p53 tetramerization. Here we characterized the BCL-xL-p53 complex by NMR spectroscopy and modulated it through mutagenesis to determine the relative contributions of BCL-xL's interactions with p53 or other BCL-2 family proteins to the BCL-xL-dependent inhibition of UV irradiation-induced apoptosis. Under our experimental conditions, one-third of the antiapoptotic activity of BCL-xL was mediated by p53 sequestration and the remaining two-thirds through sequestration of proapoptotic BCL-2 family members. Our studies define the contributions of cytosolic p53 to UV irradiation-induced apoptosis and provide opportunities to explore its contributions to other p53-dependent apoptotic signaling pathways.
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Lee DH, Ha JH, Kim Y, Jang M, Park SJ, Yoon HS, Kim EH, Bae KH, Park BC, Park SG, Yi GS, Chi SW. A conserved mechanism for binding of p53 DNA-binding domain and anti-apoptotic Bcl-2 family proteins. Mol Cells 2014; 37:264-9. [PMID: 24646834 PMCID: PMC3969048 DOI: 10.14348/molcells.2014.0001] [Citation(s) in RCA: 21] [Impact Index Per Article: 2.1] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/03/2014] [Accepted: 01/14/2014] [Indexed: 01/12/2023] Open
Abstract
The molecular interaction between tumor suppressor p53 and the anti-apoptotic Bcl-2 family proteins plays an essential role in the transcription-independent apoptotic pathway of p53. In this study, we investigated the binding of p53 DNA-binding domain (p53DBD) with the anti-apoptotic Bcl-2 family proteins, Bcl-w, Mcl-1, and Bcl-2, using GST pull-down assay and NMR spectroscopy. The GST pull-down assays and NMR experiments demonstrated the direct binding of the p53DBD with Bcl-w, Mcl-1, and Bcl-2. Further, NMR chemical shift perturbation data showed that Bcl-w and Mcl-1 bind to the positively charged DNA-binding surface of p53DBD. Noticeably, the refined structural models of the complexes between p53DBD and Bcl-w, Mcl-1, and Bcl-2 showed that the binding mode of p53DBD is highly conserved among the anti-apoptotic Bcl-2 family proteins. Furthermore, the chemical shift perturbations on Bcl-w, Mcl-1, and Bcl-2 induced by p53DBD binding occurred not only at the p53DBD-binding acidic region but also at the BH3 peptide-binding pocket, which suggests an allosteric conformational change similar to that observed in Bcl-XL. Taken altogether, our results revealed a structural basis for a conserved binding mechanism between p53DBD and the anti-apoptotic Bcl-2 family proteins, which shed light on to the molecular understanding of the transcription-independent apoptosis pathway of p53.
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Affiliation(s)
- Dong-Hwa Lee
- Medical Proteomics Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806,
Korea
| | - Ji-Hyang Ha
- Medical Proteomics Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806,
Korea
| | - Yul Kim
- Department of Bio and Brain Engineering, Korea Advanced Institute for Science and Technology, Daejeon 305-701,
Korea
| | - Mi Jang
- Medical Proteomics Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806,
Korea
| | - Sung Jean Park
- College of Pharmacy, Gachon University, Incheon 406-799,
Korea
| | - Ho Sup Yoon
- Division of Structural Biology and Biochemistry, School of Biological Sciences, Nanyang Technological University, Singapore 637511,
Singapore
| | - Eun-Hee Kim
- Division of Magnetic Resonance, Korea Basic Science Institute, Cheongwon 363-883,
Korea
| | - Kwang-Hee Bae
- Research Center for Integrated Cellulomics, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806,
Korea
| | - Byoung Chul Park
- Medical Proteomics Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806,
Korea
| | - Sung Goo Park
- Medical Proteomics Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806,
Korea
| | - Gwan-Su Yi
- Department of Bio and Brain Engineering, Korea Advanced Institute for Science and Technology, Daejeon 305-701,
Korea
| | - Seung-Wook Chi
- Medical Proteomics Research Center, Korea Research Institute of Bioscience and Biotechnology, Daejeon 305-806,
Korea
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Moldoveanu T, Follis AV, Kriwacki RW, Green DR. Many players in BCL-2 family affairs. Trends Biochem Sci 2014; 39:101-11. [PMID: 24503222 DOI: 10.1016/j.tibs.2013.12.006] [Citation(s) in RCA: 312] [Impact Index Per Article: 31.2] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/01/2013] [Revised: 12/19/2013] [Accepted: 12/27/2013] [Indexed: 01/08/2023]
Abstract
During apoptotic cell death, cellular stress signals converge at the mitochondria to induce mitochondrial outer-membrane permeabilization (MOMP) through B cell lymphoma-2 (BCL-2) family proteins and their effectors. BCL-2 proteins function through protein-protein interactions, the mechanisms and structural aspects of which are only now being uncovered. Recently, the elucidation of the dynamic features underlying their function has highlighted their structural plasticity and the consequent complex thermodynamic landscape governing their protein-protein interactions. These studies show that canonical interactions involve a conserved, hydrophobic groove, whereas non-canonical interactions function allosterically outside the groove. We review the latest structural advances in understanding the interactions and functions of mammalian BCL-2 family members, and discuss new opportunities to modulate these proteins in health and disease.
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Affiliation(s)
- Tudor Moldoveanu
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Ariele Viacava Follis
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA
| | - Richard W Kriwacki
- Department of Structural Biology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.
| | - Douglas R Green
- Department of Immunology, St. Jude Children's Research Hospital, Memphis, TN 38105, USA.
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Structural basis for the conserved binding mechanism of MDM2-inhibiting peptides and anti-apoptotic Bcl-2 family proteins. Biochem Biophys Res Commun 2014; 445:120-5. [PMID: 24491548 DOI: 10.1016/j.bbrc.2014.01.130] [Citation(s) in RCA: 8] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Key Words] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/14/2014] [Accepted: 01/25/2014] [Indexed: 02/04/2023]
Abstract
The interaction between tumor suppressor p53 and the anti-apoptotic Bcl-2 family proteins serves a critical role in the transcription-independent apoptosis mechanism of p53. Our previous studies showed that an MDM2-inhibiting motif (residues 15-29) in the p53 transactivation domain (p53TAD) mediates the interaction with anti-apoptotic Bcl-2 family proteins. In this study, we provided structural models of the complexes between the MDM2-inhibiting p53TAD peptide and Mcl-1, Bcl-w, and Kaposi sarcoma-associated herpes virus (KSHV) Bcl-2 using NMR chemical shift perturbation data. The binding mode of the MDM2-inhibiting p53TAD peptide is highly conserved among the anti-apoptotic Bcl-2 family proteins despite their distinct specificities for pro-apoptotic Bcl-2 family proteins. We also identified the binding of a phage-display-derived MDM2-inhibiting peptide 12-1 to anti-apoptotic Bcl-XL protein by using NMR spectroscopy. The structural model of the Bcl-XL/12-1 peptide complex revealed that the conserved residues Phe4, Trp8, and Leu11 in the MDM2-inhibiting peptide fit into a hydrophobic cleft of Bcl-XL in a manner similar to that of pro-apoptotic Bcl-2 homology 3 (BH3) peptides. Our results shed light on the mechanism underlying dual-targeting of the FxxxWxxL-based α-helical motif to MDM2 and anti-apoptotic Bcl-2 family proteins for anticancer therapy.
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Shin JS, Ha JH, Chi SW. Targeting of p53 peptide analogues to anti-apoptotic Bcl-2 family proteins as revealed by NMR spectroscopy. Biochem Biophys Res Commun 2014; 443:882-7. [DOI: 10.1016/j.bbrc.2013.12.054] [Citation(s) in RCA: 7] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 12/07/2013] [Accepted: 12/10/2013] [Indexed: 10/25/2022]
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Structural biology of the Bcl-2 family and its mimicry by viral proteins. Cell Death Dis 2013; 4:e909. [PMID: 24201808 PMCID: PMC3847314 DOI: 10.1038/cddis.2013.436] [Citation(s) in RCA: 111] [Impact Index Per Article: 10.1] [Reference Citation Analysis] [Abstract] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/25/2013] [Revised: 09/09/2013] [Accepted: 10/02/2013] [Indexed: 12/16/2022]
Abstract
Intrinsic apoptosis in mammals is regulated by protein–protein interactions among the B-cell lymphoma-2 (Bcl-2) family. The sequences, structures and binding specificity between pro-survival Bcl-2 proteins and their pro-apoptotic Bcl-2 homology 3 motif only (BH3-only) protein antagonists are now well understood. In contrast, our understanding of the mode of action of Bax and Bak, the two necessary proteins for apoptosis is incomplete. Bax and Bak are isostructural with pro-survival Bcl-2 proteins and also interact with BH3-only proteins, albeit weakly. Two sites have been identified; the in-groove interaction analogous to the pro-survival BH3-only interaction and a site on the opposite molecular face. Interaction of Bax or Bak with activator BH3-only proteins and mitochondrial membranes triggers a series of ill-defined conformational changes initiating their oligomerization and mitochondrial outer membrane permeabilization. Many actions of the mammalian pro-survival Bcl-2 family are mimicked by viruses. By expressing proteins mimicking mammalian pro-survival Bcl-2 family proteins, viruses neutralize death-inducing members of the Bcl-2 family and evade host cell apoptosis during replication. Remarkably, structural elements are preserved in viral Bcl-2 proteins even though there is in many cases little discernible sequence conservation with their mammalian counterparts. Some viral Bcl-2 proteins are dimeric, but they have distinct structures to those observed for mammalian Bcl-2 proteins. Furthermore, viral Bcl-2 proteins modulate innate immune responses regulated by NF-κB through an interface separate from the canonical BH3-binding groove. Our increasing structural understanding of the viral Bcl-2 proteins is leading to new insights in the cellular Bcl-2 network by exploring potential alternate functional modes in the cellular context. We compare the cellular and viral Bcl-2 proteins and discuss how alterations in their structure, sequence and binding specificity lead to differences in behavior, and together with the intrinsic structural plasticity in the Bcl-2 fold enable exquisite control over critical cellular signaling pathways.
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