1
|
Esposito E, Napolitano G, Pescatore A, Calculli G, Incoronato MR, Leonardi A, Ursini MV. COMMD7 as a novel NEMO interacting protein involved in the termination of NF-κB signaling. J Cell Physiol 2016; 231:152-61. [PMID: 26060140 DOI: 10.1002/jcp.25066] [Citation(s) in RCA: 15] [Impact Index Per Article: 1.9] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 01/15/2015] [Accepted: 06/05/2015] [Indexed: 11/08/2022]
Abstract
NEMO/IKKγ is the regulatory subunit of the IκB Kinase (IKK) complex, required for the activation of the NF-κB pathway, which is involved in a variety of key processes, including immunity, inflammation, differentiation, and cell survival. Termination of NF-κB activity on specific -κB responsive genes, which is crucial for the resolution of inflammatory responses, can be achieved by direct degradation of the chromatin-bound NF-κB subunit RelA/p65, a process mediated by a protein complex that contains Copper Metabolism Murr1 Domain 1 (COMMD1). In this study, we identify COMMD7, another member of the COMMDs protein family, as a novel NEMO-interacting protein. We show that COMMD7 exerts an inhibitory effect on NF-κB activation upon TNFα stimulation. COMMD7 interacts with COMMD1 and together they cooperate to down-regulate NF-κB activity. Accordingly, termination of TNFα-induced NF-κB activity on the -κB responsive gene, Icam1, is defective in cells silenced for COMMD7 expression. Furthermore, this impairment is not greatly increased when we silence the expression of both COMMD7 and COMMD1 indicating that the two proteins participate in the same pathway of termination of TNFα-induced NF-κB activity. Importantly, we have demonstrated that COMMD7's binding to NEMO does not interfere with the binding to the IKKs, and that the disruption of the IKK complex through the use of the NBP competitor impairs the termination of NF-κB activity. We propose that an intact IKK complex is required for the termination of NF-κB-dependent transcription and that COMMD7 acts as a scaffold in the IKK-mediated NF-κB termination.
Collapse
Affiliation(s)
- Elio Esposito
- Institute of Genetics and Biophysics, 'Adriano Buzzati-Traverso' (CNR), Naples, Italy
| | - Gennaro Napolitano
- Institute of Genetics and Biophysics, 'Adriano Buzzati-Traverso' (CNR), Naples, Italy
| | - Alessandra Pescatore
- Institute of Genetics and Biophysics, 'Adriano Buzzati-Traverso' (CNR), Naples, Italy
| | - Giuseppe Calculli
- Institute of Genetics and Biophysics, 'Adriano Buzzati-Traverso' (CNR), Naples, Italy
| | | | - Antonio Leonardi
- Dipartimento di Medicina Molecolare e Biotecnologie Mediche, "Federico II" University of Naples, via S. Pansini 5, Naples, Italy
| | - Matilde Valeria Ursini
- Institute of Genetics and Biophysics, 'Adriano Buzzati-Traverso' (CNR), Naples, Italy.,IRCCS SDN, Via E. Gianturco 113, Naples, Italy
| |
Collapse
|
2
|
Abstract
The tumor necrosis factor receptor (TNF-R)-associated factor (TRAF) family of intracellular proteins were originally identified as signaling adaptors that bind directly to the cytoplasmic regions of receptors of the TNF-R superfamily. The past decade has witnessed rapid expansion of receptor families identified to employ TRAFs for signaling. These include Toll-like receptors (TLRs), NOD-like receptors (NLRs), RIG-I-like receptors (RLRs), T cell receptor, IL-1 receptor family, IL-17 receptors, IFN receptors and TGFβ receptors. In addition to their role as adaptor proteins, most TRAFs also act as E3 ubiquitin ligases to activate downstream signaling events. TRAF-dependent signaling pathways typically lead to the activation of nuclear factor-κBs (NF-κBs), mitogen-activated protein kinases (MAPKs), or interferon-regulatory factors (IRFs). Compelling evidence obtained from germ-line and cell-specific TRAF-deficient mice demonstrates that each TRAF plays indispensable and non-redundant physiological roles, regulating innate and adaptive immunity, embryonic development, tissue homeostasis, stress response, and bone metabolism. Notably, mounting evidence implicates TRAFs in the pathogenesis of human diseases such as cancers and autoimmune diseases, which has sparked new appreciation and interest in TRAF research. This review presents an overview of the current knowledge of TRAFs, with an emphasis on recent findings concerning TRAF molecules in signaling and in human diseases.
Collapse
Affiliation(s)
- Ping Xie
- Department of Cell Biology and Neuroscience, Rutgers University, 604 Allison Road, Nelson Labs Room B336, Piscataway, New Jersey 08854.
| |
Collapse
|
3
|
Sun Q, Han C, Liu L, Wang Y, Deng H, Bai L, Jiang T. Crystal structure and functional implication of the RUN domain of human NESCA. Protein Cell 2012; 3:609-17. [PMID: 22821014 PMCID: PMC4875354 DOI: 10.1007/s13238-012-2052-3] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Key Words] [MESH Headings] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 05/24/2012] [Accepted: 07/09/2012] [Indexed: 10/28/2022] Open
Abstract
NESCA, a newly discovered signaling adapter protein in the NGF-pathway, contains a RUN domain at its N-terminus. Here we report the crystal structure of the NESCA RUN domain determined at 2.0-Å resolution. The overall fold of the NESCA RUN domain comprises nine helices, resembling the RUN domain of RPIPx and the RUN1 domain of Rab6IP1. However, compared to the other RUN domains, the RUN domain of NESCA has significantly different surface electrostatic distributions at the putative GTPase-interacting interface. We demonstrate that the RUN domain of NESCA can bind H-Ras, a downstream signaling molecule of TrkA, with high affinity. Moreover, NESCA RUN can directly interact with TrkA. These results provide new insights into how NESCA participates in the NGF-TrkA signaling pathway.
Collapse
MESH Headings
- Adaptor Proteins, Signal Transducing/chemistry
- Adaptor Proteins, Signal Transducing/genetics
- Adaptor Proteins, Signal Transducing/metabolism
- Amino Acid Sequence
- Binding Sites
- Crystallography, X-Ray
- Gene Expression
- Guanine Nucleotide Exchange Factors
- Humans
- Models, Molecular
- Molecular Sequence Data
- Nerve Growth Factor/chemistry
- Nerve Growth Factor/genetics
- Nerve Growth Factor/metabolism
- Oncogene Protein p21(ras)/chemistry
- Oncogene Protein p21(ras)/genetics
- Oncogene Protein p21(ras)/metabolism
- Protein Binding
- Protein Structure, Tertiary
- Receptor, trkA/chemistry
- Receptor, trkA/genetics
- Receptor, trkA/metabolism
- Recombinant Proteins/chemistry
- Recombinant Proteins/genetics
- Recombinant Proteins/metabolism
- Sequence Homology, Amino Acid
- Signal Transduction
- rab GTP-Binding Proteins/chemistry
Collapse
Affiliation(s)
- Qifan Sun
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101 China
- Graduate University of Chinese Academy of Sciences, Beijing, 100039 China
| | - Chuanhui Han
- Graduate University of Chinese Academy of Sciences, Beijing, 100039 China
- Chinese Academy of Sciences Key Laboratory of Infection and Immunity, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101 China
| | - Lan Liu
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101 China
- Graduate University of Chinese Academy of Sciences, Beijing, 100039 China
| | - Yizhi Wang
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101 China
- Graduate University of Chinese Academy of Sciences, Beijing, 100039 China
| | - Hongyu Deng
- Chinese Academy of Sciences Key Laboratory of Infection and Immunity, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101 China
| | - Lin Bai
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101 China
| | - Tao Jiang
- National Laboratory of Biomacromolecules, Institute of Biophysics, Chinese Academy of Sciences, Beijing, 100101 China
| |
Collapse
|
4
|
MacDonald JIS, Dietrich A, Gamble S, Hryciw T, Grant RI, Meakin SO. Nesca, a novel neuronal adapter protein, links the molecular motor kinesin with the pre-synaptic membrane protein, syntaxin-1, in hippocampal neurons. J Neurochem 2012; 121:861-80. [PMID: 22404429 DOI: 10.1111/j.1471-4159.2012.07729.x] [Citation(s) in RCA: 10] [Impact Index Per Article: 0.8] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 11/27/2022]
Abstract
Vesicular transport in neurons plays a vital role in neuronal function and survival. Nesca is a novel protein that we previously identified and herein describe its pattern of expression, subcellular localization and protein-protein interactions both in vitro and in vivo. Specifically, a large proportion of Nesca is in tight association with both actin and microtubule cytoskeletal proteins. Nesca binds to F-actin, microtubules, βIII and acetylated α-tubulin, but not neurofilaments or the actin-binding protein drebrin, in in vitro-binding assays. Nesca co-immunoprecipitates with kinesin heavy chain (KIF5B) and kinesin light-chain motors as well as with the synaptic membrane precursor protein, syntaxin-1, and is a constituent of the post-synaptic density. Moreover, in vitro-binding assays indicate that Nesca directly binds KIF5B, kinesin light-chain and syntaxin-1. In contrast, Nesca does not co-immunoprecipitate with the kinesin motors KIF1B, KIF3A nor does it bind syntaxin-4 or the synaptosome-associated protein 25 kDa (SNAP-25) in vitro. Nesca expression in neurons is highly punctuate, co-stains with syntaxin-1, and is found in fractions containing markers of early endosomes and Golgi suggesting that it is involved in vesicular transport. Collectively, these data suggest that Nesca functions as an adapter involved in neuronal vesicular transport including vesicles containing soluble N-ethylmaleimide sensitive factor attachment protein receptors that are essential to exocytosis.
Collapse
Affiliation(s)
- James I S MacDonald
- Laboratory of Neural Signaling, Molecular Brain Research Group, Robarts Research Institute, Schulich School of Medicine, University of Western Ontario, London, ON, Canada
| | | | | | | | | | | |
Collapse
|
5
|
Yoshida H, Kitagishi Y, Okumura N, Murakami M, Nishimura Y, Matsuda S. How do you RUN on? FEBS Lett 2011; 585:1707-10. [PMID: 21570977 DOI: 10.1016/j.febslet.2011.05.011] [Citation(s) in RCA: 6] [Impact Index Per Article: 0.5] [Reference Citation Analysis] [Abstract] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Received: 04/08/2011] [Revised: 05/03/2011] [Accepted: 05/03/2011] [Indexed: 10/18/2022]
Abstract
RUN domain is present in several proteins related to the functions of Rap and Rab family GTPases. Accumulating evidence supports the hypothesis that RUN domain-containing proteins act as a component of vesicle traffic and might be responsible for an interaction with a filamentous network linked to actin cytoskeleton or microtubules. That is to say, on one hand, RUN domains associate with Rab or Rap family proteins, on the other hand, they also might interact with motor proteins such as kinesin or myosin via intervention molecules. In this review, we summarize the background and current status of RUN domain research with an emphasis on the interaction between RUN domain and motor proteins with respect to the vesicle traffic on filamentous network.
Collapse
Affiliation(s)
- Hitomi Yoshida
- Department of Environmental Health Science, Nara Women's University, Kita-Uoya Nishimachi, Nara, Japan
| | | | | | | | | | | |
Collapse
|
6
|
Gautheron J, Pescatore A, Fusco F, Esposito E, Yamaoka S, Agou F, Ursini MV, Courtois G. Identification of a new NEMO/TRAF6 interface affected in incontinentia pigmenti pathology. Hum Mol Genet 2010; 19:3138-49. [DOI: 10.1093/hmg/ddq222] [Citation(s) in RCA: 24] [Impact Index Per Article: 1.7] [Reference Citation Analysis] [Track Full Text] [Journal Information] [Subscribe] [Scholar Register] [Indexed: 12/27/2022] Open
|