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Investigation of the adaptor protein PLIC-2 in multiple pathways
PLIC, Protein Linking IAP (CD47) to Cytoskeleton, have long since been implicated in connecting the extracellular membrane to the intracellular cell cytoskeleton. This phenomenon is supposedly achieved by bridging a receptor protein CD47 to vimentin, an intermediate filament, which in turn regulates...
Autores principales: | , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Elsevier
2017
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5341616/ https://www.ncbi.nlm.nih.gov/pubmed/28286874 http://dx.doi.org/10.1016/j.bbrep.2017.01.013 |
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author | Nguyen, Khiem Puthenveetil, Robbins Vinogradova, Olga |
author_facet | Nguyen, Khiem Puthenveetil, Robbins Vinogradova, Olga |
author_sort | Nguyen, Khiem |
collection | PubMed |
description | PLIC, Protein Linking IAP (CD47) to Cytoskeleton, have long since been implicated in connecting the extracellular membrane to the intracellular cell cytoskeleton. This phenomenon is supposedly achieved by bridging a receptor protein CD47 to vimentin, an intermediate filament, which in turn regulates integrin dependent cell spreading. Since the discovery of these proteins, the molecular details of the above-mentioned interactions and the underlying complexes are yet to be characterized. Several independent studies have together emphasized PLIC/Ubiquilin’s role in the proteasomal degradation pathway. This seems to be in contrast to the purported initial discovery of PLIC as a cytoskeletal adaptor protein. In an effort to reconcile the different roles associated with the ubiquitous PLIC proteins, we tested the involvement of PLIC-2 both in the proteasomal degradation pathway and as a protein linking the cell cytoskeleton to the cytoplasmic tail of CD47. This was achieved thorough an in vitro investigation of their binding interface using a combination of biophysical techniques. Our results show that the two terminal domains of PLIC-2 interact weakly with each other, while the C-terminal UBA domain interacts strongly with ubiquitin. Interestingly, no perceptible interaction was observed for PLIC-2 with the cytoplasmic tail of CD47 questioning its role as a “PLIC” protein linking the cell membrane to the cytoskeleton. |
format | Online Article Text |
id | pubmed-5341616 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 2017 |
publisher | Elsevier |
record_format | MEDLINE/PubMed |
spelling | pubmed-53416162017-09-27 Investigation of the adaptor protein PLIC-2 in multiple pathways Nguyen, Khiem Puthenveetil, Robbins Vinogradova, Olga Biochem Biophys Rep Research Article PLIC, Protein Linking IAP (CD47) to Cytoskeleton, have long since been implicated in connecting the extracellular membrane to the intracellular cell cytoskeleton. This phenomenon is supposedly achieved by bridging a receptor protein CD47 to vimentin, an intermediate filament, which in turn regulates integrin dependent cell spreading. Since the discovery of these proteins, the molecular details of the above-mentioned interactions and the underlying complexes are yet to be characterized. Several independent studies have together emphasized PLIC/Ubiquilin’s role in the proteasomal degradation pathway. This seems to be in contrast to the purported initial discovery of PLIC as a cytoskeletal adaptor protein. In an effort to reconcile the different roles associated with the ubiquitous PLIC proteins, we tested the involvement of PLIC-2 both in the proteasomal degradation pathway and as a protein linking the cell cytoskeleton to the cytoplasmic tail of CD47. This was achieved thorough an in vitro investigation of their binding interface using a combination of biophysical techniques. Our results show that the two terminal domains of PLIC-2 interact weakly with each other, while the C-terminal UBA domain interacts strongly with ubiquitin. Interestingly, no perceptible interaction was observed for PLIC-2 with the cytoplasmic tail of CD47 questioning its role as a “PLIC” protein linking the cell membrane to the cytoskeleton. Elsevier 2017-02-03 /pmc/articles/PMC5341616/ /pubmed/28286874 http://dx.doi.org/10.1016/j.bbrep.2017.01.013 Text en © 2017 The Authors http://creativecommons.org/licenses/by-nc-nd/4.0/ This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/). |
spellingShingle | Research Article Nguyen, Khiem Puthenveetil, Robbins Vinogradova, Olga Investigation of the adaptor protein PLIC-2 in multiple pathways |
title | Investigation of the adaptor protein PLIC-2 in multiple pathways |
title_full | Investigation of the adaptor protein PLIC-2 in multiple pathways |
title_fullStr | Investigation of the adaptor protein PLIC-2 in multiple pathways |
title_full_unstemmed | Investigation of the adaptor protein PLIC-2 in multiple pathways |
title_short | Investigation of the adaptor protein PLIC-2 in multiple pathways |
title_sort | investigation of the adaptor protein plic-2 in multiple pathways |
topic | Research Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC5341616/ https://www.ncbi.nlm.nih.gov/pubmed/28286874 http://dx.doi.org/10.1016/j.bbrep.2017.01.013 |
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