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The N-terminal heptad repeat region of reovirus cell attachment protein σ1 is responsible for σ1 oligomer stability and possesses intrinsic oligomerization function
The oligomerization domain of the reovirus cell attachment protein (σ1) was probed using the type 3 reovirus of synthesized in vitro. Trypsin cleaved the α1 protein (49K molecular weight) approximately in the middle and yielded a 26K N-terminal fragment and a 23K C-terminal fragment. Under condition...
Autores principales: | , , , , , |
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Formato: | Online Artículo Texto |
Lenguaje: | English |
Publicado: |
Published by Elsevier Inc.
1991
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Materias: | |
Acceso en línea: | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7130816/ https://www.ncbi.nlm.nih.gov/pubmed/2024469 http://dx.doi.org/10.1016/0042-6822(91)90677-4 |
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author | Leone, Gustavo Duncan, Roy Mah, David C.W. Price, Angela Cashdollar, L.William Lee, Patrick W.K. |
author_facet | Leone, Gustavo Duncan, Roy Mah, David C.W. Price, Angela Cashdollar, L.William Lee, Patrick W.K. |
author_sort | Leone, Gustavo |
collection | PubMed |
description | The oligomerization domain of the reovirus cell attachment protein (σ1) was probed using the type 3 reovirus of synthesized in vitro. Trypsin cleaved the α1 protein (49K molecular weight) approximately in the middle and yielded a 26K N-terminal fragment and a 23K C-terminal fragment. Under conditions which allowed for the identification of intact σ1 in the oligomeric form (∼200K) by sodium dodecyl sulfate-polyacrylamide gel electrophoresis, the N-terminal 26K fragment was found to exist as stable trimers (80K) and, to a less extent, as dimers (54K), whereas the C-terminal fragment remained in the monomeric form. A polypeptide (161 amino acids) containing the N-terminal heptad repeat region synthesized in vitro was capable of forming stable dimers and trimers. Using various criteria, we demonstrated that the stability of the intact σ1 oligomer is conferred mainly by the N-terminal heptad repeat region. Our results are summarized in a model in which individual heptad repeats are held together in a three-stranded α-helical coiled-coil structure via both hydrophobic and electrostatic interactions. |
format | Online Article Text |
id | pubmed-7130816 |
institution | National Center for Biotechnology Information |
language | English |
publishDate | 1991 |
publisher | Published by Elsevier Inc. |
record_format | MEDLINE/PubMed |
spelling | pubmed-71308162020-04-08 The N-terminal heptad repeat region of reovirus cell attachment protein σ1 is responsible for σ1 oligomer stability and possesses intrinsic oligomerization function Leone, Gustavo Duncan, Roy Mah, David C.W. Price, Angela Cashdollar, L.William Lee, Patrick W.K. Virology Article The oligomerization domain of the reovirus cell attachment protein (σ1) was probed using the type 3 reovirus of synthesized in vitro. Trypsin cleaved the α1 protein (49K molecular weight) approximately in the middle and yielded a 26K N-terminal fragment and a 23K C-terminal fragment. Under conditions which allowed for the identification of intact σ1 in the oligomeric form (∼200K) by sodium dodecyl sulfate-polyacrylamide gel electrophoresis, the N-terminal 26K fragment was found to exist as stable trimers (80K) and, to a less extent, as dimers (54K), whereas the C-terminal fragment remained in the monomeric form. A polypeptide (161 amino acids) containing the N-terminal heptad repeat region synthesized in vitro was capable of forming stable dimers and trimers. Using various criteria, we demonstrated that the stability of the intact σ1 oligomer is conferred mainly by the N-terminal heptad repeat region. Our results are summarized in a model in which individual heptad repeats are held together in a three-stranded α-helical coiled-coil structure via both hydrophobic and electrostatic interactions. Published by Elsevier Inc. 1991-05 2004-02-10 /pmc/articles/PMC7130816/ /pubmed/2024469 http://dx.doi.org/10.1016/0042-6822(91)90677-4 Text en Copyright © 1991 Published by Elsevier Inc. Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre - including this research content - immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active. |
spellingShingle | Article Leone, Gustavo Duncan, Roy Mah, David C.W. Price, Angela Cashdollar, L.William Lee, Patrick W.K. The N-terminal heptad repeat region of reovirus cell attachment protein σ1 is responsible for σ1 oligomer stability and possesses intrinsic oligomerization function |
title | The N-terminal heptad repeat region of reovirus cell attachment protein σ1 is responsible for σ1 oligomer stability and possesses intrinsic oligomerization function |
title_full | The N-terminal heptad repeat region of reovirus cell attachment protein σ1 is responsible for σ1 oligomer stability and possesses intrinsic oligomerization function |
title_fullStr | The N-terminal heptad repeat region of reovirus cell attachment protein σ1 is responsible for σ1 oligomer stability and possesses intrinsic oligomerization function |
title_full_unstemmed | The N-terminal heptad repeat region of reovirus cell attachment protein σ1 is responsible for σ1 oligomer stability and possesses intrinsic oligomerization function |
title_short | The N-terminal heptad repeat region of reovirus cell attachment protein σ1 is responsible for σ1 oligomer stability and possesses intrinsic oligomerization function |
title_sort | n-terminal heptad repeat region of reovirus cell attachment protein σ1 is responsible for σ1 oligomer stability and possesses intrinsic oligomerization function |
topic | Article |
url | https://www.ncbi.nlm.nih.gov/pmc/articles/PMC7130816/ https://www.ncbi.nlm.nih.gov/pubmed/2024469 http://dx.doi.org/10.1016/0042-6822(91)90677-4 |
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