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Gong X, Boyer JB, Gierlich S, Pożoga M, Weidenhausen J, Sinning I, Meinnel T, Giglione C, Wang Y, Hell R, Wirtz M. HYPK controls stability and catalytic activity of the N-terminal acetyltransferase A in Arabidopsis thaliana. Cell Rep 2024; 43:113768. [PMID: 38363676 DOI: 10.1016/j.celrep.2024.113768] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/28/2023] [Revised: 12/12/2023] [Accepted: 01/25/2024] [Indexed: 02/18/2024] Open
Abstract
The ribosome-tethered N-terminal acetyltransferase A (NatA) acetylates 52% of soluble proteins in Arabidopsis thaliana. This co-translational modification of the N terminus stabilizes diverse cytosolic plant proteins. The evolutionary conserved Huntingtin yeast partner K (HYPK) facilitates NatA activity in planta, but in vitro, its N-terminal helix α1 inhibits human NatA activity. To dissect the regulatory function of HYPK protein domains in vivo, we genetically engineer CRISPR-Cas9 mutants expressing a HYPK fragment lacking all functional domains (hypk-cr1) or an internally deleted HYPK variant truncating helix α1 but retaining the C-terminal ubiquitin-associated (UBA) domain (hypk-cr2). We find that the UBA domain of HYPK is vital for stabilizing the NatA complex in an organ-specific manner. The N terminus of HYPK, including helix α1, is critical for promoting NatA activity on substrates starting with various amino acids. Consequently, deleting only 42 amino acids inside the HYPK N terminus causes substantial destabilization of the plant proteome and higher tolerance toward drought stress.
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Affiliation(s)
- Xiaodi Gong
- Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany
| | - Jean-Baptiste Boyer
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France
| | - Simone Gierlich
- Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany
| | - Marlena Pożoga
- Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany
| | | | - Irmgard Sinning
- Heidelberg University Biochemistry Center, 69120 Heidelberg, Germany
| | - Thierry Meinnel
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France
| | - Carmela Giglione
- Université Paris-Saclay, CEA, CNRS, Institute for Integrative Biology of the Cell (I2BC), 91198 Gif-sur-Yvette, France
| | - Yonghong Wang
- State Key Laboratory of Crop Biology, College of Life Sciences, Shandong Agricultural University, 271018 Tai'an, China
| | - Rüdiger Hell
- Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany
| | - Markus Wirtz
- Centre for Organismal Studies, Heidelberg University, 69120 Heidelberg, Germany.
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Li F, Wang W, Li Y, Liu X, Zhu Z, Tang J, Hu Y. NAA10 gene related Ogden syndrome with obstructive hypertrophic cardiomyopathy: A rare case report. Medicine (Baltimore) 2024; 103:e36034. [PMID: 38335407 PMCID: PMC10860986 DOI: 10.1097/md.0000000000036034] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 08/11/2023] [Accepted: 10/19/2023] [Indexed: 02/12/2024] Open
Abstract
RATIONALE Ogden syndrome is an exceptionally rare X-linked disease caused by mutations in the NAA10 gene. Reported cases of this syndrome are approximately 20 children and are associated with facial dysmorphism, growth delay, developmental disorders, congenital heart disease, and arrhythmia. PATIENT CONCERNS We present the clinical profile of a 3-year-old girl with Ogden syndrome carrying a de novo NAA10 variant [NM_003491:c.247C>T, p.(Arg83Cys)]. During infancy, she exhibited features such as left ventricular hypertrophy, protruding eyeballs, and facial deformities. DIAGNOSIS Clinical diagnosis included Ogden syndrome, congenital heart disease (obstructive hypertrophic cardiomyopathy, left ventricular outflow tract obstruction, mitral valve disease, tricuspid valve regurgitation), tonsillar and adenoidal hypertrophy, and speech and language delay. INTERVENTIONS The girl was considered to have hypertrophic cardiomyopathy (HCM) and received oral metoprolol as a treatment for HCM at our hospital. The drug treatment effect was not ideal, and her hypertrophy myocardial symptoms were aggravated and she had to be hospitalized for surgery. OUTCOMES The girl underwent a modified Morrow procedure under cardiopulmonary bypass and experienced a favorable postoperative recovery. No pulmonary infections or significant complications were observed during this period. The patient's family expressed satisfaction with the treatment process. LESSONS The case emphasizes the HCM of Odgen syndrome, and early surgery should be performed if drug treatment is ineffective.
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Affiliation(s)
- Feihong Li
- Department of Anesthesiology, Children’s Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Wenyang Wang
- Department of Anesthesiology, Children’s Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yazhou Li
- Department of Clinical Laboratory, Huadong Hospital, Fudan University, Shanghai, China
| | - Xiwang Liu
- Department of Cardiac Surgery, Children’s Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Zhirui Zhu
- Department of Anesthesiology, Children’s Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Jian Tang
- Department of Anesthesiology, Children’s Hospital, Zhejiang University School of Medicine, Hangzhou, China
| | - Yaoqin Hu
- Department of Anesthesiology, Children’s Hospital, Zhejiang University School of Medicine, Hangzhou, China
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Takahashi YH, Schulze JM, Jackson J, Hentrich T, Seidel C, Jaspersen SL, Kobor MS, Shilatifard A. Dot1 and histone H3K79 methylation in natural telomeric and HM silencing. Mol Cell 2011; 42:118-26. [PMID: 21474073 DOI: 10.1016/j.molcel.2011.03.006] [Citation(s) in RCA: 88] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/09/2010] [Revised: 12/02/2010] [Accepted: 02/16/2011] [Indexed: 11/18/2022]
Abstract
The expression of genes residing near telomeres is attenuated through telomere position-effect variegation (TPEV). By using a URA3 reporter located at TEL-VII-L of Saccharomyces cerevisiae, it was proposed that the disruptor of telomeric silencing-1 (Dot1) regulates TPEV by catalyzing H3K79 methylation. URA3 reporter assays also indicated that H3K79 methylation is required for HM silencing. Surprisingly, a genome-wide expression analysis of H3K79 methylation-defective mutants identified only a few telomeric genes, such as COS12 at TEL-VII-L, to be subject to H3K79 methylation-dependent natural silencing. Consistently, loss of Dot1 did not globally alter Sir2 or Sir3 occupancy in subtelomeric regions, but only led to some telomere-specific changes. Furthermore, H3K79 methylation by Dot1 did not play a role in the maintenance of natural HML silencing. Therefore, commonly used URA3 reporter assays may not report on natural PEV, and therefore, studies concerning the epigenetic mechanism of silencing in yeast should also employ assays reporting on natural gene expression patterns.
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Affiliation(s)
- Yoh-Hei Takahashi
- Stowers Institute for Medical Research, 1000 East 50th Street, Kansas City, MO 64110, USA
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Hua KT, Tan CT, Johansson G, Lee JM, Yang PW, Lu HY, Chen CK, Su JL, Chen PB, Wu YL, Chi CC, Kao HJ, Shih HJ, Chen MW, Chien MH, Chen PS, Lee WJ, Cheng TY, Rosenberger G, Chai CY, Yang CJ, Huang MS, Lai TC, Chou TY, Hsiao M, Kuo ML. N-α-acetyltransferase 10 protein suppresses cancer cell metastasis by binding PIX proteins and inhibiting Cdc42/Rac1 activity. Cancer Cell 2011; 19:218-31. [PMID: 21295525 DOI: 10.1016/j.ccr.2010.11.010] [Citation(s) in RCA: 82] [Impact Index Per Article: 6.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/11/2010] [Revised: 06/03/2010] [Accepted: 11/08/2010] [Indexed: 12/28/2022]
Abstract
N-α-acetyltransferase 10 protein, Naa10p, is an N-acetyltransferase known to be involved in cell cycle control. We found that Naa10p was expressed lower in varieties of malignancies with lymph node metastasis compared with non-lymph node metastasis. Higher Naa10p expression correlates the survival of lung cancer patients. Naa10p significantly suppressed migration, tumor growth, and metastasis independent of its enzymatic activity. Instead, Naa10p binds to the GIT-binding domain of PIX, thereby preventing the formation of the GIT-PIX-Paxillin complex, resulting in reduced intrinsic Cdc42/Rac1 activity and decreased cell migration. Forced expression of PIX in Naa10-transfected tumor cells restored the migration and metastasis ability. We suggest that Naa10p functions as a tumor metastasis suppressor by disrupting the migratory complex, PIX-GIT- Paxillin, in cancer cells.
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Affiliation(s)
- Kuo-Tai Hua
- Graduate Institute of Toxicology, National Taiwan University College of Medicine, Taipei 100, Taiwan
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Wang ZH, Gong JL, Yu M, Yang H, Lai JH, Ma MX, Wu H, Li L, Tan DY. Up-regulation of human arrest-defective 1 protein is correlated with metastatic phenotype and poor prognosis in breast cancer. Asian Pac J Cancer Prev 2011; 12:1973-1977. [PMID: 22292636] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 05/31/2023] Open
Abstract
BACKGROUND Human arrest defective 1 protein (ARD1), as a N-terminal acetyltransferase, has been reported to play a crucial role in tumorigenesis, but the results are somewhat controversial. To explore the clinical and pathological significance of ARD1 in breast tumorigenesis, we analyzed ARD1 status in multiple types of breast disease. METHODS The expression of ARD1 protein was assessed by immunohistochemistry in 356 cases including 82 invasive ductal carcinomas (IDC), 159 fibroadenomas, 66 hyperplasia of mammary glands, 19 inflammatory breast disease, 30 breast cysts, and in 29 postoperative treatment patients. We assessed the relationship of ARD1 protein with clinical and pathological characteristics using χ2 test. RESULTS ARD1 protein was observed at 61.0% (50/82), 54.7% (87/159), 37.9% (25/66), 36.8% (7/19) in IDC, fibroadenoma, hyperplasia, and inflammation, respectively, and less than 30.0% for breast cyst. Thus, high ARD1 expression correlated with breast cancer (relative risk = 1.32, P < 0.005). Moreover, the level of ARD1 protein in carcinoma patients was distinctly related to lymph node metastasis and ER status, with 94.0% (47/50) as copmpared to 6.0% (3/50) in metastatic and non-metastatic (P < 0.001), and 84.0% (42/50) and 16.0% (8/50) for ER + and ER - (P < 0.01), respectively. In addition, the level of ARD1 appeared to have potential for evaluation of prognosis in breast cancer patients after postoperative therapy. CONCLUSIONS These results suggest that ARD1 expression may be as a potential target for exploring the mechanism of breast cancer metastasic to lymph nodes and hormone-responsive regulation.
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Affiliation(s)
- Ze-Hua Wang
- Laboratory of Biochemistry and Molecular Biology, School of Life Science, Yunnan University, Kunming, China
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Lee CF, Ou DSC, Lee SB, Chang LH, Lin RK, Li YS, Upadhyay AK, Cheng X, Wang YC, Hsu HS, Hsiao M, Wu CW, Juan LJ. hNaa10p contributes to tumorigenesis by facilitating DNMT1-mediated tumor suppressor gene silencing. J Clin Invest 2010; 120:2920-30. [PMID: 20592467 PMCID: PMC2912195 DOI: 10.1172/jci42275] [Citation(s) in RCA: 80] [Impact Index Per Article: 5.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/11/2010] [Accepted: 05/12/2010] [Indexed: 12/25/2022] Open
Abstract
Hypermethylation-mediated tumor suppressor gene silencing plays a crucial role in tumorigenesis. Understanding its underlying mechanism is essential for cancer treatment. Previous studies on human N-alpha-acetyltransferase 10, NatA catalytic subunit (hNaa10p; also known as human arrest-defective 1 [hARD1]), have generated conflicting results with regard to its role in tumorigenesis. Here we provide multiple lines of evidence indicating that it is oncogenic. We have shown that hNaa10p overexpression correlated with poor survival of human lung cancer patients. In vitro, enforced expression of hNaa10p was sufficient to cause cellular transformation, and siRNA-mediated depletion of hNaa10p impaired cancer cell proliferation in colony assays and xenograft studies. The oncogenic potential of hNaa10p depended on its interaction with DNA methyltransferase 1 (DNMT1). Mechanistically, hNaa10p positively regulated DNMT1 enzymatic activity by facilitating its binding to DNA in vitro and its recruitment to promoters of tumor suppressor genes, such as E-cadherin, in vivo. Consistent with this, interaction between hNaa10p and DNMT1 was required for E-cadherin silencing through promoter CpG methylation, and E-cadherin repression contributed to the oncogenic effects of hNaa10p. Together, our data not only establish hNaa10p as an oncoprotein, but also reveal that it contributes to oncogenesis through modulation of DNMT1 function.
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Affiliation(s)
- Chung-Fan Lee
- Institute of Molecular Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan.
Genomics Research Center, Academia Sinica, Taipei, Taiwan.
Institute of Cancer Research, National Health Research Institutes, Zhunan, Taiwan.
Institute of Molecular and Cellular Biology, National Tsing Hua University, Hsinchu, Taiwan.
Department of Biochemistry, Emory University School of Medicine, Atlanta, Georgia, USA.
Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
Division of Thoracic Surgery, Department of Surgery, Taipei Veterans General Hospital, National Yang-Ming University School of Medicine, Taipei, Taiwan.
Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.
Institute of Biochemistry and Molecular Biology, National Yang-Ming University, Taipei, Taiwan
| | - Derick S.-C. Ou
- Institute of Molecular Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan.
Genomics Research Center, Academia Sinica, Taipei, Taiwan.
Institute of Cancer Research, National Health Research Institutes, Zhunan, Taiwan.
Institute of Molecular and Cellular Biology, National Tsing Hua University, Hsinchu, Taiwan.
Department of Biochemistry, Emory University School of Medicine, Atlanta, Georgia, USA.
Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
Division of Thoracic Surgery, Department of Surgery, Taipei Veterans General Hospital, National Yang-Ming University School of Medicine, Taipei, Taiwan.
Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.
Institute of Biochemistry and Molecular Biology, National Yang-Ming University, Taipei, Taiwan
| | - Sung-Bau Lee
- Institute of Molecular Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan.
Genomics Research Center, Academia Sinica, Taipei, Taiwan.
Institute of Cancer Research, National Health Research Institutes, Zhunan, Taiwan.
Institute of Molecular and Cellular Biology, National Tsing Hua University, Hsinchu, Taiwan.
Department of Biochemistry, Emory University School of Medicine, Atlanta, Georgia, USA.
Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
Division of Thoracic Surgery, Department of Surgery, Taipei Veterans General Hospital, National Yang-Ming University School of Medicine, Taipei, Taiwan.
Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.
Institute of Biochemistry and Molecular Biology, National Yang-Ming University, Taipei, Taiwan
| | - Liang-Hao Chang
- Institute of Molecular Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan.
Genomics Research Center, Academia Sinica, Taipei, Taiwan.
Institute of Cancer Research, National Health Research Institutes, Zhunan, Taiwan.
Institute of Molecular and Cellular Biology, National Tsing Hua University, Hsinchu, Taiwan.
Department of Biochemistry, Emory University School of Medicine, Atlanta, Georgia, USA.
Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
Division of Thoracic Surgery, Department of Surgery, Taipei Veterans General Hospital, National Yang-Ming University School of Medicine, Taipei, Taiwan.
Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.
Institute of Biochemistry and Molecular Biology, National Yang-Ming University, Taipei, Taiwan
| | - Ruo-Kai Lin
- Institute of Molecular Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan.
Genomics Research Center, Academia Sinica, Taipei, Taiwan.
Institute of Cancer Research, National Health Research Institutes, Zhunan, Taiwan.
Institute of Molecular and Cellular Biology, National Tsing Hua University, Hsinchu, Taiwan.
Department of Biochemistry, Emory University School of Medicine, Atlanta, Georgia, USA.
Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
Division of Thoracic Surgery, Department of Surgery, Taipei Veterans General Hospital, National Yang-Ming University School of Medicine, Taipei, Taiwan.
Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.
Institute of Biochemistry and Molecular Biology, National Yang-Ming University, Taipei, Taiwan
| | - Ying-Shiuan Li
- Institute of Molecular Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan.
Genomics Research Center, Academia Sinica, Taipei, Taiwan.
Institute of Cancer Research, National Health Research Institutes, Zhunan, Taiwan.
Institute of Molecular and Cellular Biology, National Tsing Hua University, Hsinchu, Taiwan.
Department of Biochemistry, Emory University School of Medicine, Atlanta, Georgia, USA.
Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
Division of Thoracic Surgery, Department of Surgery, Taipei Veterans General Hospital, National Yang-Ming University School of Medicine, Taipei, Taiwan.
Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.
Institute of Biochemistry and Molecular Biology, National Yang-Ming University, Taipei, Taiwan
| | - Anup K. Upadhyay
- Institute of Molecular Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan.
Genomics Research Center, Academia Sinica, Taipei, Taiwan.
Institute of Cancer Research, National Health Research Institutes, Zhunan, Taiwan.
Institute of Molecular and Cellular Biology, National Tsing Hua University, Hsinchu, Taiwan.
Department of Biochemistry, Emory University School of Medicine, Atlanta, Georgia, USA.
Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
Division of Thoracic Surgery, Department of Surgery, Taipei Veterans General Hospital, National Yang-Ming University School of Medicine, Taipei, Taiwan.
Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.
Institute of Biochemistry and Molecular Biology, National Yang-Ming University, Taipei, Taiwan
| | - Xiaodong Cheng
- Institute of Molecular Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan.
Genomics Research Center, Academia Sinica, Taipei, Taiwan.
Institute of Cancer Research, National Health Research Institutes, Zhunan, Taiwan.
Institute of Molecular and Cellular Biology, National Tsing Hua University, Hsinchu, Taiwan.
Department of Biochemistry, Emory University School of Medicine, Atlanta, Georgia, USA.
Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
Division of Thoracic Surgery, Department of Surgery, Taipei Veterans General Hospital, National Yang-Ming University School of Medicine, Taipei, Taiwan.
Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.
Institute of Biochemistry and Molecular Biology, National Yang-Ming University, Taipei, Taiwan
| | - Yi-Ching Wang
- Institute of Molecular Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan.
Genomics Research Center, Academia Sinica, Taipei, Taiwan.
Institute of Cancer Research, National Health Research Institutes, Zhunan, Taiwan.
Institute of Molecular and Cellular Biology, National Tsing Hua University, Hsinchu, Taiwan.
Department of Biochemistry, Emory University School of Medicine, Atlanta, Georgia, USA.
Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
Division of Thoracic Surgery, Department of Surgery, Taipei Veterans General Hospital, National Yang-Ming University School of Medicine, Taipei, Taiwan.
Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.
Institute of Biochemistry and Molecular Biology, National Yang-Ming University, Taipei, Taiwan
| | - Han-Shui Hsu
- Institute of Molecular Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan.
Genomics Research Center, Academia Sinica, Taipei, Taiwan.
Institute of Cancer Research, National Health Research Institutes, Zhunan, Taiwan.
Institute of Molecular and Cellular Biology, National Tsing Hua University, Hsinchu, Taiwan.
Department of Biochemistry, Emory University School of Medicine, Atlanta, Georgia, USA.
Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
Division of Thoracic Surgery, Department of Surgery, Taipei Veterans General Hospital, National Yang-Ming University School of Medicine, Taipei, Taiwan.
Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.
Institute of Biochemistry and Molecular Biology, National Yang-Ming University, Taipei, Taiwan
| | - Michael Hsiao
- Institute of Molecular Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan.
Genomics Research Center, Academia Sinica, Taipei, Taiwan.
Institute of Cancer Research, National Health Research Institutes, Zhunan, Taiwan.
Institute of Molecular and Cellular Biology, National Tsing Hua University, Hsinchu, Taiwan.
Department of Biochemistry, Emory University School of Medicine, Atlanta, Georgia, USA.
Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
Division of Thoracic Surgery, Department of Surgery, Taipei Veterans General Hospital, National Yang-Ming University School of Medicine, Taipei, Taiwan.
Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.
Institute of Biochemistry and Molecular Biology, National Yang-Ming University, Taipei, Taiwan
| | - Cheng-Wen Wu
- Institute of Molecular Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan.
Genomics Research Center, Academia Sinica, Taipei, Taiwan.
Institute of Cancer Research, National Health Research Institutes, Zhunan, Taiwan.
Institute of Molecular and Cellular Biology, National Tsing Hua University, Hsinchu, Taiwan.
Department of Biochemistry, Emory University School of Medicine, Atlanta, Georgia, USA.
Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
Division of Thoracic Surgery, Department of Surgery, Taipei Veterans General Hospital, National Yang-Ming University School of Medicine, Taipei, Taiwan.
Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.
Institute of Biochemistry and Molecular Biology, National Yang-Ming University, Taipei, Taiwan
| | - Li-Jung Juan
- Institute of Molecular Medicine, College of Medicine, National Taiwan University, Taipei, Taiwan.
Genomics Research Center, Academia Sinica, Taipei, Taiwan.
Institute of Cancer Research, National Health Research Institutes, Zhunan, Taiwan.
Institute of Molecular and Cellular Biology, National Tsing Hua University, Hsinchu, Taiwan.
Department of Biochemistry, Emory University School of Medicine, Atlanta, Georgia, USA.
Department of Pharmacology, College of Medicine, National Cheng Kung University, Tainan, Taiwan.
Division of Thoracic Surgery, Department of Surgery, Taipei Veterans General Hospital, National Yang-Ming University School of Medicine, Taipei, Taiwan.
Institute of Biomedical Sciences, Academia Sinica, Taipei, Taiwan.
Institute of Biochemistry and Molecular Biology, National Yang-Ming University, Taipei, Taiwan
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Huang GL, Li BK, Zhang MY, Zhang HZ, Wei RR, Yuan YF, Shi M, Chen XQ, Huang L, Li AH, Huang BJ, Li HH, Wang HY. LOH analysis of genes around D4S2964 identifies ARD1B as a prognostic predictor of hepatocellular carcinoma. World J Gastroenterol 2010; 16:2046-54. [PMID: 20419844 PMCID: PMC2860084 DOI: 10.3748/wjg.v16.i16.2046] [Citation(s) in RCA: 11] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Journal Information] [Submit a Manuscript] [Subscribe] [Scholar Register] [Received: 01/10/2010] [Revised: 02/14/2010] [Accepted: 02/21/2010] [Indexed: 02/06/2023] Open
Abstract
AIM To investigate genes around the locus D4S2964 affected by loss of heterozygosity (LOH) and their clinical implications. METHODS Four hundred and forty single nucleotide polymorphisms (SNPs) located at 49 genes around D4S2964 were selected from the National Center for Biotechnology Information website for the SNPs microarray fabrication. LOH of SNPs markers in 112 cases of hepatocellular carcinoma (HCC) tissues and paired adjacent liver tissues were investigated by the SNPs microarray. The correlation between allelic losses with clinicopathological features and overall survival was analyzed. RESULTS A fine map of LOH of SNPs in genes around D4S2964 was plotted. The average frequency of LOH in genes was 0.39. A correlation between cirrhosis and the FAL index (fractional allelic loss) was found (P = 0.0202). Larger tumor size was found to be significantly associated with LOH in genes ADP-ribosyltransferase 3 (ART3), nucleoporin 54 kDa (NUP54), scavenger receptor class B, member 2 (SCARB2) and coiled-coil domain containing 158 (CCDC158) (P = 0.043, P = 0.019, P = 0.001, P = 0.037, respectively). Kaplan-Meier analysis showed that patients with LOH in ARD1 homolog B (ARD1B) and septin 11 (SEPT11) had a significantly lower survival rate than those with retention (P = 0.021 and P = 0.004, respectively). A Cox regression model suggested that LOH in ARD1B and SEPT11, respectively, were predictors of the overall survival in HCC (P = 0.006 and P = 0.026, respectively). CONCLUSION LOH in genes around D4S2964 may play an important role in HCC development and progression. LOH in ARD1B and SEPT11 could serve as novel prognostic predictors in HCC patients.
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Yu M, Wang Z, Gong J, Ma M, Jiao Y, Huang W, Lü Q, Li L, Yang H, Tan D. [Production of anti-recombinant human arrest defective 1 protein (hARD1) monoclonal antibodies for assaying human breast cancer tissues]. Sheng Wu Gong Cheng Xue Bao 2010; 26:57-62. [PMID: 20353093] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/29/2023]
Abstract
Human arrest defective 1(hARD1) is an acetyltransferase catalyzing the N-terminal acetylation of proteins after translation. The high expression of hARD1 could be an indicator of the breast cancer. In current study, we produced an anti-hARD lp monoclonal antibody that could specifically recognize ARD1 in breast cancer tissues by using the immunohistochemical assay. The full-length His-tag hARD1 protein (1-235 aa) was over-expressed in Escherichia coli, and purified recombinant protein was injected into Balb/c mice to perform immunization procedure. Eight stable positive monoclonal cell lines were isolated. ELISA results demonstrated that all light chains of antibodies were kappa, and the heavy chains displayed three subtypes IgG1, IgG2a and IgG2b, respectively. A monoclonal antibody, which could specifically recognize hARD1 protein in breast cancer tissues, was identified by screening different cancer tissues using antibody-specificity method. Further, the specificity of the antibody was confirmed by Western blotting analysis. Our study would facilitate breast cancer diagnosis by using this ARD1 monoclonal antibody in clinic. Also, this antibody could be used as an important tool for further investigating the role of ARD1 in tumorigenesis.
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Affiliation(s)
- Min Yu
- Laboratory of Biochemistry and Molecular Biology, School ofLife Science, Yunnan University, Kunming 650091, China
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Shin DH, Chun YS, Lee KH, Shin HW, Park JW. Arrest defective-1 controls tumor cell behavior by acetylating myosin light chain kinase. PLoS One 2009; 4:e7451. [PMID: 19826488 PMCID: PMC2758594 DOI: 10.1371/journal.pone.0007451] [Citation(s) in RCA: 56] [Impact Index Per Article: 3.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/06/2009] [Accepted: 09/23/2009] [Indexed: 12/04/2022] Open
Abstract
Background The enhancement of cell motility is a critical event during tumor cell spreading. Since myosin light chain kinase (MLCK) regulates cell behavior, it is regarded as a promising target in terms of preventing tumor invasion and metastasis. Since MLCK was identified to be associated with human arrest defective-1 (hARD1) through yeast two-hybrid screening, we here tested the possibility that hARD1 acts as a regulator of MLCK and by so doing controls tumor cell motility. Methodology/Principal Findings The physical interaction between MLCK and hARD1 was confirmed both in vivo and in vitro by immunoprecipitation assay and affinity chromatography. hARD1, which is known to have the activity of protein lysine ε-acetylation, bound to and acetylated MLCK activated by Ca2+ signaling, and by so doing deactivated MLCK, which led to a reduction in the phosphorylation of MLC. Furthermore, hARD1 inhibited tumor cell migration and invasion MLCK-dependently. Our mutation study revealed that hARD1 associated with an IgG motif of MLCK and acetylated the Lys608 residue in this motif. The K608A-mutated MLCK was neither acetylated nor inactivated by hARD1, and its stimulatory effect on cell motility was not inhibited by hARD1. Conclusion/Significance These results indicate that hARD1 is a bona fide regulator of MLCK, and that hARD1 plays a crucial role in the balance between tumor cell migration and stasis. Thus, hARD1 could be a therapeutic target in the context of preventing tumor invasion and metastasis.
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Affiliation(s)
- Dong Hoon Shin
- Department of Pharmacology, Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Chongno-gu, Seoul, Korea
| | - Yang-Sook Chun
- Department of Physiology, Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Chongno-gu, Seoul, Korea
| | - Kyoung-Hwa Lee
- Department of Pharmacology, Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Chongno-gu, Seoul, Korea
| | - Hyun-Woo Shin
- Department of Pharmacology, Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Chongno-gu, Seoul, Korea
| | - Jong-Wan Park
- Department of Pharmacology, Ischemic/Hypoxic Disease Institute, Seoul National University College of Medicine, Chongno-gu, Seoul, Korea
- * E-mail:
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10
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Chun KH, Cho SJ, Choi JS, Kim SH, Kim KW, Lee SK. Differential regulation of splicing, localization and stability of mammalian ARD1235 and ARD1225 isoforms. Biochem Biophys Res Commun 2007; 353:18-25. [PMID: 17161380 DOI: 10.1016/j.bbrc.2006.11.131] [Citation(s) in RCA: 18] [Impact Index Per Article: 1.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/03/2006] [Accepted: 11/15/2006] [Indexed: 11/25/2022]
Abstract
ARD1 protein is a mammalian gene product homologous to a yeast Ard1p (Arrest defective 1 protein) acetyltransferase. Although two alternative splicing products of ARD1, ARD1(235) and ARD1(225), were reported in mouse, only ARD1(235) orthologue was reported in humans. Here we show that ARD1(225) is not expressed in humans, suggesting that factors regulating alternative splicing of ARD1 may have evolved differently between species. In human cells, hARD1(235) is shown to be present in both nucleus and cytoplasm. However, in mouse cells, mARD1(235) and mARD1(225) proteins are localized to the nucleus and cytoplasm, respectively. Moreover, during apoptosis, ARD1(235) and ARD1(225) isoforms are destabilized by different mechanisms in a species-specific manner and dependent on destabilizing reagents. These results indicate that ARD1(235) and ARD1(225) isoforms may have different activities and function in different subcellular compartments of mammalian cells.
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Affiliation(s)
- Kwang-Hoon Chun
- Division of Pharmaceutical Biosciences, College of Pharmacy, The Research Institute for Pharmaceutical Sciences, Seoul National University, Seoul 151-742, Republic of Korea
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11
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Abstract
Arrest defective 1 (ARD1), an acetyltransferase, is essential for the yeast life cycle. Although its human homologue (hARD1) has been identified, its biological functions in human cells remain unclear. In the present study, we examined the biological function of hARD1. In H1299 and A549 lung cancer cells, hARD1-silencing RNA inhibited cell proliferation and induced G(1) arrest. Cyclin D1 was also found to be down-regulated in these growth-arrested cells, and the ectopic expression of cyclin D1 rescued cell growth. hARD1 knockdown repressed the promoter activity of the cyclin D1 gene, which inhibited the transcription of cyclin D1. Moreover, hARD1 knockdown reduced the binding of beta-catenin/TCF4 transcription factor to cyclin D1 promoter and repressed its transcriptional activity. Inversely, hARD1 expression increased the transcriptional activity of beta-catenin. Both endogenous and ectopically expressed hARD1 was coimmunoprecipitated with beta-catenin. hARD1 knockdown did not affect beta-catenin expression or degradation but noticeably reduced acetylated beta-catenin. The beta-catenin binding and acetylation by hARD1 were observed in vitro. Therefore, it is suggested that hARD1 participates in proliferation of lung cancer cells via the activation of beta-catenin.
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Affiliation(s)
- Ji-Hong Lim
- Cancer Research Institute and Departments of Pharmacology and Physiology, Seoul National University College of Medicine, Seoul, Korea
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12
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Bilton R, Trottier E, Pouysségur J, Brahimi-Horn MC. ARDent about acetylation and deacetylation in hypoxia signalling. Trends Cell Biol 2006; 16:616-21. [PMID: 17070052 DOI: 10.1016/j.tcb.2006.10.002] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/07/2006] [Revised: 09/22/2006] [Accepted: 10/09/2006] [Indexed: 11/19/2022]
Abstract
Given the key role that the alpha subunit of the alphabeta heterodimeric transcription factor hypoxia-inducible factor-1 (HIF-1) has in tumourigenesis, and in particular in angiogenesis, a full understanding of its regulation is crucial to the development of cancer therapeutics. Posttranslational acetylation and deacetylation of this subunit by an acetyltransferase called Arrest-defective-1 (ARD1) and by different histone deacetylases (HDACs), respectively, has been suggested as a mechanism. However, conflicting data bring into question the foundations of this mechanism and at present it is not clear what the precise role of these proteins is with respect to HIF. Nonetheless, the observation that small-molecule inhibitors of HDACs have anti-angiogenic activity suggests that acetylation and deacetylation of HIF or HIF modifiers represents a potential target in cancer therapy.
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Affiliation(s)
- Rebecca Bilton
- Institute of Signaling, Developmental Biology and Cancer Research CNRS UMR 6543, University of Nice, Centre A. Lacassagne, 33 Avenue Valombrose, 06189 Nice, France
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13
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Han SH, Ha JY, Kim KH, Oh SJ, Kim DJ, Kang JY, Yoon HJ, Kim SH, Seo JH, Kim KW, Suh SW. Expression, crystallization and preliminary X-ray crystallographic analyses of two N-terminal acetyltransferase-related proteins from Thermoplasma acidophilum. Acta Crystallogr Sect F Struct Biol Cryst Commun 2006; 62:1127-30. [PMID: 17077495 PMCID: PMC2225214 DOI: 10.1107/s1744309106040267] [Citation(s) in RCA: 2] [Impact Index Per Article: 0.1] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/15/2006] [Accepted: 09/30/2006] [Indexed: 11/10/2022]
Abstract
N-terminal acetylation is one of the most common protein modifications in eukaryotes, occurring in approximately 80-90% of cytosolic mammalian proteins and about 50% of yeast proteins. ARD1 (arrest-defective protein 1), together with NAT1 (N-acetyltransferase protein 1) and possibly NAT5, is responsible for the NatA activity in Saccharomyces cerevisiae. In mammals, ARD1 is involved in cell proliferation, neuronal development and cancer. Interestingly, it has been reported that mouse ARD1 (mARD1(225)) mediates epsilon-acetylation of hypoxia-inducible factor 1alpha (HIF-1alpha) and thereby enhances HIF-1alpha ubiquitination and degradation. Here, the preliminary X-ray crystallographic analyses of two N-terminal acetyltransferase-related proteins encoded by the Ta0058 and Ta1140 genes of Thermoplasma acidophilum are reported. The Ta0058 protein is related to an N-terminal acetyltransferase complex ARD1 subunit, while Ta1140 is a putative N-terminal acetyltransferase-related protein. Ta0058 shows 26% amino-acid sequence identity to both mARD1(225) and human ARD1(235). The sequence identity between Ta0058 and Ta1140 is 28%. Ta0058 and Ta1140 were overexpressed in Escherichia coli fused with an N-terminal purification tag. Ta0058 was crystallized at 297 K using a reservoir solution consisting of 0.1 M sodium acetate pH 4.6, 8%(w/v) polyethylene glycol 4000 and 35%(v/v) glycerol. X-ray diffraction data were collected to 2.17 A. The Ta0058 crystals belong to space group P4(1) (or P4(3)), with unit-cell parameters a = b = 49.334, c = 70.384 A, alpha = beta = gamma = 90 degrees. The asymmetric unit contains a monomer, giving a calculated crystal volume per protein weight (V(M)) of 2.13 A(3) Da(-1) and a solvent content of 42.1%. Ta1140 was also crystallized at 297 K using a reservoir solution consisting of 0.1 M trisodium citrate pH 5.6, 20%(v/v) 2-propanol, 20%(w/v) polyethylene glycol 4000 and 0.2 M sodium chloride. X-ray diffraction data were collected to 2.40 A. The Ta1140 crystals belong to space group R3, with hexagonal unit-cell parameters a = b = 75.174, c = 179.607 A, alpha = beta = 90, gamma = 120 degrees. Two monomers are likely to be present in the asymmetric unit, with a V(M) of 2.51 A(3) Da(-1) and a solvent content of 51.0%.
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Affiliation(s)
- Sang Hee Han
- Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-742, South Korea
| | - Jun Yong Ha
- Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-742, South Korea
| | - Kyoung Hoon Kim
- Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-742, South Korea
| | - Sung Jin Oh
- Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-742, South Korea
| | - Do Jin Kim
- Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-742, South Korea
| | - Ji Yong Kang
- Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-742, South Korea
| | - Hye Jin Yoon
- Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-742, South Korea
| | - Se-Hee Kim
- NeuroVascular Coordination Research Center, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 151-742, South Korea
| | - Ji Hae Seo
- NeuroVascular Coordination Research Center, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 151-742, South Korea
| | - Kyu-Won Kim
- NeuroVascular Coordination Research Center, Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 151-742, South Korea
| | - Se Won Suh
- Department of Chemistry, College of Natural Sciences, Seoul National University, Seoul 151-742, South Korea
- Correspondence e-mail:
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14
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Broides A, Ault BH, Arthus MF, Bichet DG, Conley ME. Severe combined immunodeficiency associated with nephrogenic diabetes insipidus and a deletion in the Xq28 region. Clin Immunol 2006; 120:147-55. [PMID: 16781893 DOI: 10.1016/j.clim.2006.05.001] [Citation(s) in RCA: 12] [Impact Index Per Article: 0.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 07/29/2005] [Revised: 04/28/2006] [Accepted: 05/01/2006] [Indexed: 11/21/2022]
Abstract
We evaluated a baby boy with severe combined immunodeficiency (SCID) and X-linked nephrogenic diabetes insipidus (NDI). This patient had less than 10% CD3+ T cells, almost all of which were positive for CD4 and CD45RO. Genetic studies demonstrated a 34.4 kb deletion at Xq28 which included AVPR2, the gene responsible for NDI; ARHGAP4, a hematopoietic specific gene encoding a GTPase-activating protein; and a highly conserved segment of DNA between ARHGAP4 and ARD1A, a gene involved in the response to hypoxia. Other patients with NDI, but without immunodeficiency, have had deletions that remove all ARHGAP4 except exon 1; however, no other patients have had deletions of the highly conserved intragenic region between ARHGAP4 and ARD1A. X chromosome inactivation studies, done on sorted cells from the mother and grandmother of the patient, carriers of the deletion, demonstrated exclusive use of the non-mutant X chromosome as the active X in CD4 and CD8 T cells. Surprisingly, NK cells, monocytes and neutrophils from these women demonstrated preferential use of the mutant X chromosome as the active X. These results are consistent with an X-linked form of SCID, due to the loss of regulatory elements that control the response to hypoxia in hematopoietic cells.
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Affiliation(s)
- Arnon Broides
- Department of Immunology, University of Tennessee College of Medicine, St. Jude Children's Research Hospital, 332 North Lauderdale, Memphis, TN 38105, USA.
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15
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Abstract
ARD1 (arrest-defective protein 1), together with NAT1 (N-acetyltransferase protein 1), is part of the major N(alpha)-acetyltransferase complex in eukaryotes responsible for alpha-acetylation of proteins and peptides. Protein acetylation has been implicated in gene expression regulation and protein-protein interaction. We characterized the native folded and misfolded conformation of hARD1. Structural characterization of native hARD1 using size exclusion chromatography, circular dichroism, and fluorescence spectroscopy shows the protein consists of a compact globular region comprising two thirds of the protein and a flexible unstructured C terminus. In addition, hARD1 forms protofilaments under physiological conditions of pH and temperature, as judged by electron microscopy and staining with the dyes Congo red and thioflavin T. The process is accelerated by thermal denaturation and high protein concentrations. Limited proteolysis of aggregated hARD1 revealed a resistant fragment whose sequence matched a region contained within the acetyl transferase domain.
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16
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Arnesen T, Betts MJ, Pendino F, Liberles DA, Anderson D, Caro J, Kong X, Varhaug JE, Lillehaug JR. Characterization of hARD2, a processed hARD1 gene duplicate, encoding a human protein N-alpha-acetyltransferase. BMC Biochem 2006; 7:13. [PMID: 16638120 PMCID: PMC1475586 DOI: 10.1186/1471-2091-7-13] [Citation(s) in RCA: 33] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/21/2005] [Accepted: 04/25/2006] [Indexed: 11/10/2022]
Abstract
BACKGROUND Protein acetylation is increasingly recognized as an important mechanism regulating a variety of cellular functions. Several human protein acetyltransferases have been characterized, most of them catalyzing epsilon-acetylation of histones and transcription factors. We recently described the human protein acetyltransferase hARD1 (human Arrest Defective 1). hARD1 interacts with NATH (N-Acetyl Transferase Human) forming a complex expressing protein N-terminal alpha-acetylation activity. RESULTS We here describe a human protein, hARD2, with 81 % sequence identity to hARD1. The gene encoding hARD2 most likely originates from a eutherian mammal specific retrotransposition event. hARD2 mRNA and protein are expressed in several human cell lines. Immunoprecipitation experiments show that hARD2 protein potentially interacts with NATH, suggesting that hARD2-NATH complexes may be responsible for protein N-alpha-acetylation in human cells. In NB4 cells undergoing retinoic acid mediated differentiation, the level of endogenous hARD1 and NATH protein decreases while the level of hARD2 protein is stable. CONCLUSION A human protein N-alpha-acetyltransferase is herein described. ARD2 potentially complements the functions of ARD1, adding more flexibility and complexity to protein N-alpha-acetylation in human cells as compared to lower organisms which only have one ARD.
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MESH Headings
- Acetylation
- Acetyltransferases/biosynthesis
- Acetyltransferases/genetics
- Acetyltransferases/isolation & purification
- Acetyltransferases/metabolism
- Acetyltransferases/physiology
- Amino Acid Sequence
- Animals
- Base Sequence
- Cell Differentiation/drug effects
- Cell Line/metabolism
- Cell Line, Tumor/drug effects
- Cell Line, Tumor/metabolism
- Chromosomes, Human, Pair 4/genetics
- Cloning, Molecular
- Enzyme Induction
- Evolution, Molecular
- Gene Duplication
- Humans
- Hypoxia-Inducible Factor 1, alpha Subunit/isolation & purification
- Hypoxia-Inducible Factor 1, alpha Subunit/metabolism
- Macropodidae/genetics
- Mice
- Models, Molecular
- Molecular Sequence Data
- N-Terminal Acetyltransferase A
- N-Terminal Acetyltransferase E
- Phylogeny
- Protein Conformation
- Protein Processing, Post-Translational
- RNA, Messenger/biosynthesis
- Rats
- Retroelements/genetics
- Sequence Alignment
- Sequence Homology
- Species Specificity
- Tretinoin/pharmacology
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Affiliation(s)
- Thomas Arnesen
- Department of Molecular Biology, University of Bergen, N-5020 Bergen, Norway
- Department of Surgical Sciences, Haukeland University Hospital, N-5021 Bergen, Norway
| | - Matthew J Betts
- Computational Biology Unit, BCCS, University of Bergen, N-5020 Bergen, Norway
| | - Frédéric Pendino
- Department of Molecular Biology, University of Bergen, N-5020 Bergen, Norway
| | - David A Liberles
- Computational Biology Unit, BCCS, University of Bergen, N-5020 Bergen, Norway
| | - Dave Anderson
- Institute of Molecular Biology, University of Oregon, Eugene, OR 97403-1229, USA
| | - Jaime Caro
- Department of Medicine, Thomas Jefferson University, Philadelphia, PA19107, USA
| | - Xianguo Kong
- Department of Medicine, Thomas Jefferson University, Philadelphia, PA19107, USA
| | - Jan E Varhaug
- Department of Surgical Sciences, Haukeland University Hospital, N-5021 Bergen, Norway
| | - Johan R Lillehaug
- Department of Molecular Biology, University of Bergen, N-5020 Bergen, Norway
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17
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Yoo YG, Kong G, Lee MO. Metastasis-associated protein 1 enhances stability of hypoxia-inducible factor-1alpha protein by recruiting histone deacetylase 1. EMBO J 2006; 25:1231-41. [PMID: 16511565 PMCID: PMC1422150 DOI: 10.1038/sj.emboj.7601025] [Citation(s) in RCA: 167] [Impact Index Per Article: 9.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 10/11/2005] [Accepted: 02/06/2006] [Indexed: 02/03/2023] Open
Abstract
The expression of metastasis-associated protein 1 (MTA1) correlates well with tumor metastases; however, the associated molecular mechanism is not fully understood. Here, we explored the possibility of cross-talk between MTA1 and hypoxia-inducible factor-1alpha (HIF-1alpha), a key regulator of angiogenic factors. We observed that the expression of MTA1 was strongly induced under hypoxia in breast cancer cell lines such as MCF-7 and MDA-MB-231. When MTA1 was overexpressed, the transcriptional activity and stability of HIF-1alpha protein were enhanced. MTA1 and HIF-1alpha are physically associated in vivo and they were localized completely in the nucleus when coexpressed. MTA1 induced the deacetylation of HIF-1alpha by increasing the expression of histone deacetylase 1 (HDAC1). MTA1 counteracted to the action of acetyltransferase, ARD1, and it did not stabilize the HIF-1alpha mutant that lacks the acetylation site, K532R. These results indicate that acetylation is the major target of MTA1/HDAC1 function. Collectively, our data provide evidence of a positive cross-talk between HIF-1alpha and MTA1, which is mediated by HDAC1 recruitment, and indicate a close connection between MTA1-associated metastasis and HIF-1-induced tumor angiogenesis.
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Affiliation(s)
- Young-Gun Yoo
- College of Pharmacy and Bio-MAX Institute, Seoul National University, Seoul, Korea
| | - Gu Kong
- Department of Pathology, College of Medicine, Hanyang University, Seoul, Korea
| | - Mi-Ock Lee
- College of Pharmacy and Bio-MAX Institute, Seoul National University, Seoul, Korea
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18
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Arnesen T, Gromyko D, Pendino F, Ryningen A, Varhaug JE, Lillehaug JR. Induction of apoptosis in human cells by RNAi-mediated knockdown of hARD1 and NATH, components of the protein N-alpha-acetyltransferase complex. Oncogene 2006; 25:4350-60. [PMID: 16518407 DOI: 10.1038/sj.onc.1209469] [Citation(s) in RCA: 81] [Impact Index Per Article: 4.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/08/2022]
Abstract
Protein N-epsilon-acetylation is recognized as an important modification influencing many biological processes, and protein deacetylase inhibitors leading to N-epsilon-hyperacetylation of histones are being clinically tested for their potential as anticancer drugs. In contrast to N-epsilon-acetyltransferases, the N-alpha-acetyltransferases transferring acetyl groups to the alpha-amino groups of protein N-termini have only been briefly described in mammalians. Human arrest defective 1 (hARD1), the only described human enzyme in this class, complexes with N-acetyltransferase human (NATH) and cotranslationally transfers acetyl groups to the N-termini of nascent polypeptides. Here, we demonstrate that knockdown of NATH and/or hARD1 triggers apoptosis in human cell lines. Knockdown of hARD1 also sensitized cells to daunorubicin-induced apoptosis, potentially pointing at the NATH-hARD1 acetyltransferase complex as a novel target for chemotherapy. Our results argue for an essential role of the NATH-hARD1 complex in cell survival and underscore the importance of protein N-alpha-acetylation in mammalian cells.
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Affiliation(s)
- T Arnesen
- Department of Molecular Biology, University of Bergen, Norway.
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19
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Murray-Rust TA, Oldham NJ, Hewitson KS, Schofield CJ. Purified recombinant hARD1 does not catalyse acetylation of Lys532of HIF-1α fragments in vitro. FEBS Lett 2006; 580:1911-8. [PMID: 16500650 DOI: 10.1016/j.febslet.2006.02.012] [Citation(s) in RCA: 32] [Impact Index Per Article: 1.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/15/2005] [Revised: 02/02/2006] [Accepted: 02/07/2006] [Indexed: 11/26/2022]
Abstract
In humans, many responses to hypoxia including angiogenesis and erythropoiesis are mediated by the alpha/beta-heterodimeric transcription factor hypoxia inducible factor (HIF). The stability and/or activity of human HIF-1alpha are modulated by post-translational modifications including prolyl and asparaginyl hydroxylation, phosphorylation, and reportedly by acetylation of the side-chain of Lys532 by ARD1 (arrest defective protein 1 homologue), an acetyltransferase. Using purified recombinant human ARD1 (hARD1) we did not observe ARD1-mediated N-acetylation of Lys532 using fragments of HIF-1alpha. However, recombinant hARD1 from Escherichia coli was produced with partial N-terminal acetylation and was observed to undergo slow self-mediated N-terminal acetylation. The observations are consistent with the other data indicating that hARD1, at least alone, does not acetylate HIF-1alpha, and with reports on the N-terminal acetyltransferase activity of a recently reported heterodimeric complex comprising hARD1 and N-acetyltransferase protein.
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Affiliation(s)
- Thomas A Murray-Rust
- The Department of Chemistry and The Oxford Centre for Molecular Sciences, Chemistry Research Laboratory, University of Oxford, Mansfield Road, Oxford OX1 3TA, United Kingdom
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20
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Zou X, Ci HL, Chen W, Li YP. [Cloning and expression analysis of human N-acetyltransferase doman containing gene hNATL]. Fen Zi Xi Bao Sheng Wu Xue Bao 2006; 39:22-8. [PMID: 16944568] [Citation(s) in RCA: 0] [Impact Index Per Article: 0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Subscribe] [Scholar Register] [Indexed: 05/11/2023]
Abstract
A novel human gene hNA TL (Human NAT Like) was cloned by in silico cloning and RT-PCR. hNA TL cDNA is 1803bp in length with a 621bp coding region, and the Genbank accession No. is AY632082. hNA TL encodes a protein of 206 amino acid residues which containing a N-acetyltransferase domain. hNA TL is located on human chromosome 17q25.2 with 6 exons. Serial analysis of gene expression revealed that hNA TL was highly expressed in human brain and gonad, while hNA TL was expressed in heart, spleen and gonad of adult mouse. Whole-mount in situ hybridization showed that hNATL specifically expresses in E7.5 and E8.5 mouse embryo brains and in HH10 stage chicken embryo brain. These results suggest that hNATL may play an important role in the development of embryo brain and may also be important for function of adult brain and gonad.
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Affiliation(s)
- Xing Zou
- Biomedical Research Institute, College of Life Sciences, Beijing Normal University, Beijing 100875
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21
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Kim SH, Park JA, Kim JH, Lee JW, Seo JH, Jung BK, Chun KH, Jeong JW, Bae MK, Kim KW. Characterization of ARD1 variants in mammalian cells. Biochem Biophys Res Commun 2006; 340:422-7. [PMID: 16376303 DOI: 10.1016/j.bbrc.2005.12.018] [Citation(s) in RCA: 31] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 11/28/2005] [Accepted: 12/03/2005] [Indexed: 11/16/2022]
Abstract
Mouse ARD1 (mARD1) has been reported to negatively regulate the hypoxia-inducible factor 1alpha (HIF-1alpha) protein by acetylating a lysine residue and enhancing HIF-1alpha ubiquitination and degradation. However, it was recently reported that human ARD1 (hARD1) does not affect HIF-1alpha stability. To further explore the activities of the two orthologs, three mouse (mARD1(198), mARD1(225), mARD1(235)) and two human (hARD1(131), hARD1(235)) variants were identified and characterized. Among these, mARD1(225) was previously reported as a novel negative regulator of HIF-1alpha. Amino acid sequence analysis showed that the C-terminal region (aa 158-225) of mARD1(225) completely differs from those of mouse and human ARD1(235), although all three proteins share a well-conserved N-acetyltransferase domain (aa 45-130). The effects of ARD1 variants were evaluated with respect to HIF-1alpha stability and acetylation activity. Interestingly, mARD1(225) strongly decreased the level of HIF-1alpha and increased the extent of acetylation, whereas mARD1(235) and hARD1(235) variants had a much weaker effect on HIF-1alpha stability and acetylation. These results suggest that ARD1 variants might have different effects on HIF-1alpha stability and acetylation, which may reflect diverse biological functions that remain to be determined.
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Affiliation(s)
- Se-Hee Kim
- Research Institute of Pharmaceutical Sciences, College of Pharmacy, Seoul National University, Seoul 151-742, Republic of Korea
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22
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Arnesen T, Kong X, Evjenth R, Gromyko D, Varhaug JE, Lin Z, Sang N, Caro J, Lillehaug JR. Interaction between HIF-1 alpha (ODD) and hARD1 does not induce acetylation and destabilization of HIF-1 alpha. FEBS Lett 2005; 579:6428-32. [PMID: 16288748 PMCID: PMC4505811 DOI: 10.1016/j.febslet.2005.10.036] [Citation(s) in RCA: 68] [Impact Index Per Article: 3.6] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 09/20/2005] [Accepted: 10/19/2005] [Indexed: 12/22/2022]
Abstract
Hypoxia inducible factor-1 alpha (HIF-1 alpha) is a central component of the cellular responses to hypoxia. Hypoxic conditions result in stabilization of HIF-1 alpha and formation of the transcriptionally active HIF-1 complex. It was suggested that mammalian ARD1 acetylates HIF-1 alpha and thereby enhances HIF-1 alpha ubiquitination and degradation. Furthermore, ARD1 was proposed to be down-regulated in hypoxia thus facilitating the stabilization of HIF-1 alpha. Here we demonstrate that the level of human ARD1 (hARD1) protein is not decreased in hypoxia. Moreover, hARD1 does not acetylate and destabilize HIF-1 alpha. However, we find that hARD1 specifically binds HIF-1 alpha, suggesting a putative, still unclear, connection between these proteins.
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Affiliation(s)
- Thomas Arnesen
- Department of Molecular Biology, University of Bergen, N-5020 Bergen, Norway
- Department of Surgical Sciences, Haukeland University Hospital, N-5021 Bergen, Norway
- Corresponding author. Fax: +47 55589683. (T. Arnesen)
| | - Xianguo Kong
- Department of Medicine, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Rune Evjenth
- Department of Molecular Biology, University of Bergen, N-5020 Bergen, Norway
| | - Darina Gromyko
- Department of Molecular Biology, University of Bergen, N-5020 Bergen, Norway
| | - Jan Erik Varhaug
- Department of Surgical Sciences, Haukeland University Hospital, N-5021 Bergen, Norway
| | - Zhao Lin
- Department of Medicine, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Nianli Sang
- Department of Medicine, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Jaime Caro
- Department of Medicine, Thomas Jefferson University, Philadelphia, PA 19107, USA
| | - Johan R. Lillehaug
- Department of Molecular Biology, University of Bergen, N-5020 Bergen, Norway
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23
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Abstract
Protein acetylation is an important posttranslational modification regulating oncogenesis, apoptosis and cell cycle. NATH (N-acetyl transferase human) is overexpressed at the mRNA level in papillary thyroid carcinomas relative to non-neoplastic thyroid tissue. The NATH protein has recently been demonstrated to be the partner of hARD1 (human Arrest defective 1) and this complex acetylates the N-termini of proteins. ARD1 has also been implicated in the destabilization of the transcription factor HIF-1alpha (hypoxia inducible factor-1alpha). Using human thyroid papillary carcinoma biopsies and NATH- and hARD1-specific antibodies, we examined the levels of endogenous NATH and hARD1 proteins in 27 patients. We demonstrate that NATH protein level is upregulated in neoplastic versus non-neoplastic tissue in good accordance with our previous mRNA findings. In all tumors in which NATH was downregulated compared to non-neoplastic tissue, the hARD1 protein level was concomitantly reduced. SiRNA-mediated knockdown of NATH resulted in decreased levels of hARD1 protein. Taken together, these results suggest that NATH positively affects the level of hARD1 protein both in vivo and in cell cultures.
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Affiliation(s)
- Thomas Arnesen
- Department of Surgical Sciences, University of Bergen and Haukeland University Hospital, Norway
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24
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Bilton R, Mazure N, Trottier E, Hattab M, Déry MA, Richard DE, Pouysségur J, Brahimi-Horn MC. Arrest-defective-1 Protein, an Acetyltransferase, Does Not Alter Stability of Hypoxia-inducible Factor (HIF)-1α and Is Not Induced by Hypoxia or HIF. J Biol Chem 2005; 280:31132-40. [PMID: 15994306 DOI: 10.1074/jbc.m504482200] [Citation(s) in RCA: 80] [Impact Index Per Article: 4.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/06/2022] Open
Abstract
The hypoxia-inducible factor (HIF) is a key player in a transcriptional pathway that controls the hypoxic response of mammalian cells. Post-translational modification of the alpha subunit of HIF determines its half-life and activity. Among the multiple reported modifications, acetylation, by an acetyltransferase termed arrest-defective-1 protein (ARD1), has been reported to decrease HIF-1alpha stability and therefore impact on hypoxic gene expression. In contrast, we report that both overexpression and silencing of ARD1 had no impact on the stability of HIF-1alpha or -2alpha and that cells silenced for ARD1 maintained hypoxic nuclear localization of HIF-1alpha. In addition, we show that the ARD1 mRNA and protein levels are not regulated by hypoxia in several human tumor cell lines, including cervical adenocarcinoma HeLa cells, fibrosarcoma HT1080 cells, adenovirus-transformed human kidney HEK293 cells, and human breast cancer MCF-7 cells. Using two model systems ((a) wild-type and HIF-1alpha-null mouse embryo fibroblasts and (b) HeLa cells silenced for HIF-1alpha or -2alpha by RNA interference), we demonstrate that the level of expression of the ARD1 protein is independent of HIF-1alpha and -2alpha. We also demonstrate that ARD1 is a stable, predominantly cytoplasmic protein expressed in a broad range of tissues, tumor cell lines, and endothelial cells. Taken together, our findings demonstrate that ARD1 has limited, if any, impact on the HIF signaling pathway.
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Affiliation(s)
- Rebecca Bilton
- Institute of Signaling, Developmental Biology and Cancer Research, CNRS UMR 6543, Centre A. Lacassagne, 33 Avenue Valombrose, Nice 06189, France
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25
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Arnesen T, Anderson D, Baldersheim C, Lanotte M, Varhaug J, Lillehaug J. Identification and characterization of the human ARD1-NATH protein acetyltransferase complex. Biochem J 2005; 386:433-43. [PMID: 15496142 PMCID: PMC1134861 DOI: 10.1042/bj20041071] [Citation(s) in RCA: 149] [Impact Index Per Article: 7.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/30/2023]
Abstract
Protein acetyltransferases and deacetylases have been implicated in oncogenesis, apoptosis and cell cycle regulation. Most of the protein acetyltransferases described acetylate epsilon-amino groups of lysine residues within proteins. Mouse ARD1 (homologue of yeast Ard1p, where Ard1p stands for arrest defective 1 protein) is the only known protein acetyltransferase catalysing acetylation of proteins at both alpha-(N-terminus) and epsilon-amino groups. Yeast Ard1p interacts with Nat1p (N-acetyltransferase 1 protein) to form a functional NAT (N-acetyltransferase). We now describe the human homologue of Nat1p, NATH (NAT human), as the partner of the hARD1 (human ARD1) protein. Included in the characterization of the NATH and hARD1 proteins is the following: (i) endogenous NATH and hARD1 proteins are expressed in human epithelial, glioma and promyelocytic cell lines; (ii) NATH and hARD1 form a stable complex, as investigated by reciprocal immunoprecipitations followed by MS analysis; (iii) NATH-hARD1 complex expresses N-terminal acetylation activity; (iv) NATH and hARD1 interact with ribosomal subunits, indicating a co-translational acetyltransferase function; (v) NATH is localized in the cytoplasm, whereas hARD1 localizes both to the cytoplasm and nucleus; (vi) hARD1 partially co-localizes in nuclear spots with the transcription factor HIF-1alpha (hypoxia-inducible factor 1alpha), a known epsilon-amino substrate of ARD1; (vii) NATH and hARD1 are cleaved during apoptosis, resulting in a decreased NAT activity. This study identifies the human homologues of the yeast Ard1p and Nat1p proteins and presents new aspects of the NATH and hARD1 proteins relative to their yeast homologues.
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Affiliation(s)
- Thomas Arnesen
- *Department of Molecular Biology, University of Bergen, N-5020 Bergen, Norway
- †Department of Surgical Sciences, University of Bergen and Haukeland University Hospital, N-5021 Bergen, Norway
| | - Dave Anderson
- ‡Institute of Molecular Biology, University of Oregon, Eugene, OR 97403-1229, U.S.A
| | | | - Michel Lanotte
- §INSERM U496, Centre G. Hayem, Hopital Saint-Louis, 1, Avenue Claude Vellefaux, 75010 Paris, France
| | - Jan E. Varhaug
- †Department of Surgical Sciences, University of Bergen and Haukeland University Hospital, N-5021 Bergen, Norway
| | - Johan R. Lillehaug
- *Department of Molecular Biology, University of Bergen, N-5020 Bergen, Norway
- To whom correspondence should be addressed (email )
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26
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Abstract
The N-terminal alanine residues of the silencing protein Sir3 and of Orc1 are acetylated by the NatA Nalpha-acetyltransferase. Mutations demonstrate that the N terminus of Sir3 is important for its function. Sir3 and, perhaps, also Orc1 are the NatA substrates whose lack of acetylation in ard1 and nat1 mutants explains the silencing defect of those mutants.
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Affiliation(s)
- Xiaorong Wang
- Department of Biochemistry and Cell Biology, Stony Brook University, New York 11794-5215, USA
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27
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Ke Q, Kluz T, Costa M. Down-regulation of the expression of the FIH-1 and ARD-1 genes at the transcriptional level by nickel and cobalt in the human lung adenocarcinoma A549 cell line. Int J Environ Res Public Health 2005; 2:10-3. [PMID: 16705796 PMCID: PMC3814691 DOI: 10.3390/ijerph2005010010] [Citation(s) in RCA: 28] [Impact Index Per Article: 1.5] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Download PDF] [Figures] [Subscribe] [Scholar Register] [Received: 11/15/2004] [Accepted: 02/06/2005] [Indexed: 11/30/2022]
Abstract
Although nickel and cobalt compounds have been known to cause induction of the transcription factor hypoxia-inducible factor 1 (HIF-1) and activation of a battery of hypoxia-inducible genes in the cell, the molecular mechanisms of this induction remain unclear. The post-translational modification of HIF-1a, the oxygen-sensitive subunit of HIF-1, regulates stabilization, nuclear translocation, DNA binding activity, and transcriptional activity of the protein. Among the enzymes regulating the post-translational modification of HIF-la, the factor inhibiting HIF-1 (FIH-1) hydroxylates the protein at asparagine 803, suppressing the interaction of HIF-1a with transcription coactivators p300/CBP and reducing the transcriptional activity of the protein. ARD-1, the acetyltransferase, acetylates HIF-1a at lysine 532, which enhances the interaction of HIF-1a with pVHL. Therefore, FIH-1 and ARD-1 negatively regulate the transcriptional activity and the stability of HIF-1a. We examined the mRNA levels of FIH-l and ARD-1 genes after exposure nickel (II) or cobalt (II) to the cell and found that both genes were down-regulated by the chemical treatment, which may lead to reduced levels of both proteins and result in increased level of HIF-1 a and its transcriptional activity.
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Affiliation(s)
- Qingdong Ke
- Nelson Institute of Environmental Medicine, New York University, School of Medicine, 57 Old Forge Road, Tuxedo, New York 10987, USA
| | - Thomas Kluz
- Nelson Institute of Environmental Medicine, New York University, School of Medicine, 57 Old Forge Road, Tuxedo, New York 10987, USA
| | - Max Costa
- Nelson Institute of Environmental Medicine, New York University, School of Medicine, 57 Old Forge Road, Tuxedo, New York 10987, USA
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28
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Gautschi M, Just S, Mun A, Ross S, Rücknagel P, Dubaquié Y, Ehrenhofer-Murray A, Rospert S. The yeast N(alpha)-acetyltransferase NatA is quantitatively anchored to the ribosome and interacts with nascent polypeptides. Mol Cell Biol 2003; 23:7403-14. [PMID: 14517307 PMCID: PMC230319 DOI: 10.1128/mcb.23.20.7403-7414.2003] [Citation(s) in RCA: 175] [Impact Index Per Article: 8.3] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/20/2022] Open
Abstract
The majority of cytosolic proteins in eukaryotes contain a covalently linked acetyl moiety at their very N terminus. The mechanism by which the acetyl moiety is efficiently transferred to a large variety of nascent polypeptides is currently only poorly understood. Yeast N(alpha)-acetyltransferase NatA, consisting of the known subunits Nat1p and the catalytically active Ard1p, recognizes a wide range of sequences and is thought to act cotranslationally. We found that NatA was quantitatively bound to ribosomes via Nat1p and contained a previously unrecognized third subunit, the N(alpha)-acetyltransferase homologue Nat5p. Nat1p not only anchored Ard1p and Nat5p to the ribosome but also was in close proximity to nascent polypeptides, independent of whether they were substrates for N(alpha)-acetylation or not. Besides Nat1p, NAC (nascent polypeptide-associated complex) and the Hsp70 homologue Ssb1/2p interact with a variety of nascent polypeptides on the yeast ribosome. A direct comparison revealed that Nat1p required longer nascent polypeptides for interaction than NAC and Ssb1/2p. Delta nat1 or Delta ard1 deletion strains were temperature sensitive and showed derepression of silent mating type loci while Delta nat5 did not display any obvious phenotype. Temperature sensitivity and derepression of silent mating type loci caused by Delta nat1 or Delta ard1 were partially suppressed by overexpression of SSB1. The combination of data suggests that Nat1p presents the N termini of nascent polypeptides for acetylation and might serve additional roles during protein synthesis.
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Affiliation(s)
- Matthias Gautschi
- Max Planck Research Unit Enzymology of Protein Folding, D-06120 Halle, Germany
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29
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Fluge Ø, Bruland O, Akslen LA, Varhaug JE, Lillehaug JR. NATH, a novel gene overexpressed in papillary thyroid carcinomas. Oncogene 2002; 21:5056-68. [PMID: 12140756 DOI: 10.1038/sj.onc.1205687] [Citation(s) in RCA: 44] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 06/05/2001] [Revised: 05/15/2002] [Accepted: 05/20/2002] [Indexed: 11/08/2022]
Abstract
In this study a replica cDNA screening (RCS) approach to identify genes differentially expressed in papillary thyroid carcinomas (PTC) was used, as compared to non-neoplastic thyroid tissues. RCS is based on hybridization of radioactively labeled cDNA probes made from the biopsies to replica membranes with 15 000 clones from a PTC cDNA library. Among the genes overexpressed in PTC, and especially in clinically aggressive tumors with histologic evidence of poorly differentiated or undifferentiated areas, a novel gene named NATH was found. NATH has two mRNA species, 4.6 and 5.8 kb, both harboring the same open reading frame encoding a putative protein of 866 amino acids. The NATH protein is homologous to yeast N-acetyltransferase (NAT)1 and to mouse NARG1 (mNAT1) and contains four tetratricopeptide repeat (TPR) domains, suggesting that NATH may be part of a multiprotein complex. Overlapping RT-PCR fragments from several PTC biopsies confirmed the NATH mRNA sequence. Northern blots, semiquantitative RT-PCR experiments, TaqMan real-time RT-PCR experiments, and in situ hybridization verified the overexpression of NATH mRNA localized to tumor cells in PTC biopsies. NATH was expressed at a low level in most human adult tissues, including the normal thyroid gland. Increased NATH expression was seen especially in a Burkitt lymphoma cell line and in adult human testis. Recombinant in vitro expression showed that NATH protein was located mainly in the cytoplasm, and was present as a single protein band of the expected 105 kDa molecular weight. Heterologous expression of NATH in the papillary carcinoma cell line (NPA) and 293 cells did not alter the cellular proliferation rate. The biological function of NATH remains to be elucidated, but the overexpression in classic PTC and especially in poorly differentiated or undifferentiated components may indicate a function in the progression of papillary thyroid carcinomas.
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Affiliation(s)
- Øystein Fluge
- Department of Molecular Biology, University of Bergen, N-5020 Bergen, Norway.
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30
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Sekine A, Saito S, Iida A, Mitsunobu Y, Higuchi S, Harigae S, Nakamura Y. Identification of single-nucleotide polymorphisms (SNPs) of human N-acetyltransferase genes NAT1, NAT2, AANAT, ARD1 and L1CAM in the Japanese population. J Hum Genet 2001; 46:314-9. [PMID: 11393533 DOI: 10.1007/s100380170065] [Citation(s) in RCA: 46] [Impact Index Per Article: 2.0] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/25/2022]
Abstract
By direct sequencing of regions of the human genome containing five genes belonging to the acetyltransferase family, arylamine N-acetyltransferase (NAT1), arylamine N-acetyltransferase (NAT2), arylalkylamine N-acetyltransferase (AANAT), L1 cell adhesion molecule (L1CAM), and the human homolog of Saccharomyces cerevisiae N-acetyltransferase ARD1, we identified 53 single-nucleotide polymorphisms (SNPs) and two insertion/ deletion polymorphisms in 48 healthy Japanese volunteers. NAT1 and NAT2 are so-called drug-metabolizing enzymes. In the NAT1 gene we found two SNPs and a 3-bp insertion/ deletion polymorphism that corresponded to the NAT1*3, *10, and *18A/*18B alleles reported in other populations. The frequencies of NAT1* alleles in our Japanese subjects were 52.6% for NAT1*4, 1.0% for NAT1*3, 40.6% for NAT1*10, 2.6% for NAT1*18A and 3.1% for NAT1*18B. In the NAT2 gene we found 32 SNPs and a 1-bp insertion/ deletion polymorphism; 6 SNPs within the coding region were reported previously and belonged to the slow acetylator group (NAT2*5, NAT2*6 and NAT2*7), and 2 of the 8 SNPs in the 5' flanking region were reported in the dbSNP of GenBank, but the remaining 24 SNPs and the insertion/deletion polymorphism were novel. The frequencies of NAT2* alleles in Japanese (51.3% for NAT2*4, 1.6% for *5B, 26.1% for *6A, 2.2% for *6B, 1.2% for *7A, 10.1% for *7B, 7.4% for *12A, and 1.1% for *13) were significantly different from those reported in Caucasian populations. In the AANAT gene we found 4 novel SNPs: 2 in the 5' flanking region, 1 in exon 4, and 1 in intron 3. In the two genes belonging to the N-terminal N-acetyltransferase family, we identified 9 SNPs, 7 of them novel, for ARD1, and six novel SNPs for L1CAM. Variations at these loci may contribute to an understanding of the way in which different genotypes may affect the activities of human N-acetyltransferases, especially as regards the therapeutic efficacy of certain drugs and antibiotics.
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Affiliation(s)
- A Sekine
- SNP Research Center, Institute of Physical and Chemical Research, Tokyo, Japan
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31
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Abstract
Mammalian brain development requires the transmission of electrical signals between neurons via the N-methyl-d-aspartate (NMDA) class of glutamate receptors. However, little is known about how NMDA receptors carry out this role. Here we report the first genes shown to be regulated by physiological levels of NMDA receptor function in developing neurons in vivo: NMDA receptor-regulated gene 1 (NARG1), NARG2, and NARG3. These genes share several striking regulatory features. All three are expressed at high levels in the neonatal brain in regions of neuronal proliferation and migration, are dramatically down-regulated during early postnatal development, and are down-regulated by NMDA receptor function. NARG2 and NARG3 appear to be novel, while NARG1 is the mammalian homologue of a yeast N-terminal acetyltransferase that regulates entry into the G(o) phase of the cell cycle. The results suggest that highly specific NMDA receptor-dependent regulation of gene expression plays an important role in the transition from proliferation of neuronal precursors to differentiation of neurons.
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Affiliation(s)
- N Sugiura
- Department of Anatomy and Cell Biology, Wayne State University, Detroit, Michigan 48201, USA
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32
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Abstract
N(alpha)-acetylation, the most common protein modification, involves the transfer of an acetyl group from acetyl-coenzyme A to the N-terminus of a protein or peptide. The major N(alpha)-acetyltransferase in Saccharomyces cerevisiae is the ARDI-NATI complex. To investigate N(alpha) -acetylation in Trypanosoma brucei we have cloned and characterised genes encoding putative homologues of ARD1 and NAT1. Both genes are single copy and ARD1, the putative catalytic component, is expressed in both bloodstream-form and insect-stage cells. In either of these life-cycle stages, disruption of both ARD1 alleles was only possible when another copy was generated via gene duplication or when ARD1 was expressed from elsewhere in the genome. These genetic manipulations demonstrate that, unlike the situation in S. cerevisiae, ARD1 is an essential gene in T. brucei. We propose that protein modification by ARD1 is essential for viability in mammalian and insect-stage T. brucei cells.
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Affiliation(s)
- A K Ingram
- London School of Hygiene and Tropical Medicine, UK
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33
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Tribioli C, Mancini M, Plassart E, Bione S, Rivella S, Sala C, Torri G, Toniolo D. Isolation of new genes in distal Xq28: transcriptional map and identification of a human homologue of the ARD1 N-acetyl transferase of Saccharomyces cerevisiae. Hum Mol Genet 1994; 3:1061-7. [PMID: 7981673 DOI: 10.1093/hmg/3.7.1061] [Citation(s) in RCA: 36] [Impact Index Per Article: 1.2] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 01/28/2023] Open
Abstract
In this paper, we describe the physical and transcriptional organization of a region of 140 kb in Xq28, 5' to the L1CAM gene. By isolation and mapping of CpG islands to the physical map of the region, isolation of cDNAs, determination of partial nucleotide sequences and study of the pattern of expression and of the orientation of the transcripts identified we have established a transcriptional map of this region. In this map, previously identified genes (L1CAM, V2R, HCF1 and RnBP) have been positioned as well as 3 new genes. All genes in the region are rather small, ranging in size from 2 to 30 kb, and very close to one another. With the exception of the V2R gene, they are housekeeping, have a CpG island at their 5' end and the same orientation of transcription. This kind of organization is consistent with the one previously described for the more distal portion of Xq28, between the Color Vision (CV) and the G6PD genes and indicates that genes with housekeeping and tissue specific pattern of expression are interspersed in the genome but they are probably found in different 'transcriptional domains'. Among the new genes, TE2 demonstrated 40% identity with the protein N-acetyl transferase ARD1 of S. cerevisiae: TE2 may be the human homologue of the S. cerevisiae gene.
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Affiliation(s)
- C Tribioli
- Istituto di Genetica Biochimica ed Evoluzionistica, CNR, Pavia, Italy
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34
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Abstract
Two yeast genes, ARD1 and NAT1, are required for the expression of an N-terminal protein acetyltransferase. This activity is required for full repression of the silent mating type locus HML, for sporulation, and for entry into G0. While the NAT1 gene product is thought to be the catalytic subunit of the enzyme, the role of the ARD1 protein has remained unclear. We have used epitope tagged derivatives of ARD1 and NAT1 to provide biochemical evidence for the formation of an ARD1-NAT1 complex, and to show that both proteins are required for the N-terminal acetyltransferase activity. We also present evidence for the formation of ARD1-ARD1 homodimers. Deletion analysis suggests that the C-terminal region of ARD1 may be involved in the formation of both ARD1-ARD1 and ARD1-NAT1 complexes.
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Affiliation(s)
- E C Park
- Department of Molecular Biology, Massachusetts General Hospital, Boston 02114
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35
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Mullen JR, Kayne PS, Moerschell RP, Tsunasawa S, Gribskov M, Colavito-Shepanski M, Grunstein M, Sherman F, Sternglanz R. Identification and characterization of genes and mutants for an N-terminal acetyltransferase from yeast. EMBO J 1989; 8:2067-75. [PMID: 2551674 PMCID: PMC401092 DOI: 10.1002/j.1460-2075.1989.tb03615.x] [Citation(s) in RCA: 239] [Impact Index Per Article: 6.8] [Reference Citation Analysis] [What about the content of this article? (0)] [Affiliation(s)] [Abstract] [MESH Headings] [Grants] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/09/2022] Open
Abstract
A gene from Saccharomyces cerevisiae has been mapped, cloned, sequenced and shown to encode a catalytic subunit of an N-terminal acetyltransferase. Regions of this gene, NAT1, and the chloramphenicol acetyltransferase genes of bacteria have limited but significant homology. A nat1 null mutant is viable but exhibits a variety of phenotypes, including reduced acetyltransferase activity, derepression of a silent mating type locus (HML) and failure to enter G0. All these phenotypes are identical to those of a previously characterized mutant, ard1. NAT1 and ARD1 are distinct genes that encode proteins with no obvious similarity. Concomitant overexpression of both NAT1 and ARD1 in yeast causes a 20-fold increase in acetyltransferase activity in vitro, whereas overexpression of either NAT1 or ARD1 alone does not raise activity over basal levels. A functional iso-1-cytochrome c protein, which is N-terminally acetylated in a NAT1 strain, is not acetylated in an isogenic nat1 mutant. At least 20 other yeast proteins, including histone H2B, are not N-terminally acetylated in either nat1 or ard1 mutants. These results suggest that NAT1 and ARD1 proteins function together to catalyze the N-terminal acetylation of a subset of yeast proteins.
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Affiliation(s)
- J R Mullen
- Department of Biochemistry, State University of New York, Stony Brook 11794
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