The SOUL family of heme-binding proteins: structure and function 15 years later
Autor(a) principal: | |
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Data de Publicação: | 2021 |
Outros Autores: | , , , , , , , , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
Texto Completo: | http://hdl.handle.net/10773/36310 |
Resumo: | The SOUL, or heme-binding protein HBP/SOUL, family represents a group of evolutionary conserved putative heme-binding proteins that contains a number of members in animal, plant and bacterial species. The structures of the murine form of HEBP1, or p22HBP, and the human form of HEBP2, or SOUL, have been determined in 2006 and 2011 respectively. In this work we discuss the structures of HEBP1 and HEBP2 in light of new X-ray data for heme bound murine HEBP1. The interaction between tetrapyrroles and HEBP1, initially proven to be hydrophobic in nature, was thought to also involve electrostatic interactions between heme propionate groups and positively charged amino acid side chains. However, the new X-ray structure, and results from murine HEBP1 variants and human HEBP1, confirm the hydrophobic nature of the heme-HEBP1 interaction, resulting in Kd values in the low nanomolar range, and rules out any electrostatic stabilization. Results from NMR relaxation time measurements for human HEBP1 describe a rigid globular protein with no change in motional regime upon heme binding. X-ray structures deposited in the PDB for human HEBP2 are very similar to each other and to the new heme-bound murine HEBP1 X-ray structure (backbone rmsd ca. 1 Å). Results from a HSQC spectrum centred on the histidine side chain Nd-proton region for HEBP2 confirm that HEBP2 does not bind heme via H42 as no chemical shift differences were observed upon heme addition for backbone NH and Nd protons. A survey of the functions attributed to HEBP1 and HEBP2 over the last 20 years span a wide range of cellular pathways. Interestingly, many of them are specific to higher eukaryotes, particularly mammals and a potential link between heme release under oxidative stress and human HEBP1 is also examined using recent data. However, at the present moment, trying to relate function to the involvement of heme. |
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The SOUL family of heme-binding proteins: structure and function 15 years laterHEBP1HEBP2SOUL proteinNMR spectroscopyX-ray crystallographyFunctionStructureThe SOUL, or heme-binding protein HBP/SOUL, family represents a group of evolutionary conserved putative heme-binding proteins that contains a number of members in animal, plant and bacterial species. The structures of the murine form of HEBP1, or p22HBP, and the human form of HEBP2, or SOUL, have been determined in 2006 and 2011 respectively. In this work we discuss the structures of HEBP1 and HEBP2 in light of new X-ray data for heme bound murine HEBP1. The interaction between tetrapyrroles and HEBP1, initially proven to be hydrophobic in nature, was thought to also involve electrostatic interactions between heme propionate groups and positively charged amino acid side chains. However, the new X-ray structure, and results from murine HEBP1 variants and human HEBP1, confirm the hydrophobic nature of the heme-HEBP1 interaction, resulting in Kd values in the low nanomolar range, and rules out any electrostatic stabilization. Results from NMR relaxation time measurements for human HEBP1 describe a rigid globular protein with no change in motional regime upon heme binding. X-ray structures deposited in the PDB for human HEBP2 are very similar to each other and to the new heme-bound murine HEBP1 X-ray structure (backbone rmsd ca. 1 Å). Results from a HSQC spectrum centred on the histidine side chain Nd-proton region for HEBP2 confirm that HEBP2 does not bind heme via H42 as no chemical shift differences were observed upon heme addition for backbone NH and Nd protons. A survey of the functions attributed to HEBP1 and HEBP2 over the last 20 years span a wide range of cellular pathways. Interestingly, many of them are specific to higher eukaryotes, particularly mammals and a potential link between heme release under oxidative stress and human HEBP1 is also examined using recent data. However, at the present moment, trying to relate function to the involvement of heme.Elsevier2023-02-14T12:20:19Z2023-12-01T00:00:00Z2021-12-01T00:00:00Z2021-12-01info:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleapplication/pdfhttp://hdl.handle.net/10773/36310eng0010-854510.1016/j.ccr.2021.214189Goodfellow, Brian J.Freire, FilipeCarvalho, Ana LuísaAveiro, Susana S.Charbonnier, PeggyMoulis, Jean-MarcDelgado, LeonildoFerreira, Gloria C.Rodrigues, João E.Poussin-Courmontagne, PierreBirck, CatherineMcEwen, AlastairMacedo, Anjos L.info:eu-repo/semantics/embargoedAccessreponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos)instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãoinstacron:RCAAP2024-02-22T12:08:29Zoai:ria.ua.pt:10773/36310Portal AgregadorONGhttps://www.rcaap.pt/oai/openaireopendoar:71602024-03-20T03:06:33.297995Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informaçãofalse |
dc.title.none.fl_str_mv |
The SOUL family of heme-binding proteins: structure and function 15 years later |
title |
The SOUL family of heme-binding proteins: structure and function 15 years later |
spellingShingle |
The SOUL family of heme-binding proteins: structure and function 15 years later Goodfellow, Brian J. HEBP1 HEBP2 SOUL protein NMR spectroscopy X-ray crystallography Function Structure |
title_short |
The SOUL family of heme-binding proteins: structure and function 15 years later |
title_full |
The SOUL family of heme-binding proteins: structure and function 15 years later |
title_fullStr |
The SOUL family of heme-binding proteins: structure and function 15 years later |
title_full_unstemmed |
The SOUL family of heme-binding proteins: structure and function 15 years later |
title_sort |
The SOUL family of heme-binding proteins: structure and function 15 years later |
author |
Goodfellow, Brian J. |
author_facet |
Goodfellow, Brian J. Freire, Filipe Carvalho, Ana Luísa Aveiro, Susana S. Charbonnier, Peggy Moulis, Jean-Marc Delgado, Leonildo Ferreira, Gloria C. Rodrigues, João E. Poussin-Courmontagne, Pierre Birck, Catherine McEwen, Alastair Macedo, Anjos L. |
author_role |
author |
author2 |
Freire, Filipe Carvalho, Ana Luísa Aveiro, Susana S. Charbonnier, Peggy Moulis, Jean-Marc Delgado, Leonildo Ferreira, Gloria C. Rodrigues, João E. Poussin-Courmontagne, Pierre Birck, Catherine McEwen, Alastair Macedo, Anjos L. |
author2_role |
author author author author author author author author author author author author |
dc.contributor.author.fl_str_mv |
Goodfellow, Brian J. Freire, Filipe Carvalho, Ana Luísa Aveiro, Susana S. Charbonnier, Peggy Moulis, Jean-Marc Delgado, Leonildo Ferreira, Gloria C. Rodrigues, João E. Poussin-Courmontagne, Pierre Birck, Catherine McEwen, Alastair Macedo, Anjos L. |
dc.subject.por.fl_str_mv |
HEBP1 HEBP2 SOUL protein NMR spectroscopy X-ray crystallography Function Structure |
topic |
HEBP1 HEBP2 SOUL protein NMR spectroscopy X-ray crystallography Function Structure |
description |
The SOUL, or heme-binding protein HBP/SOUL, family represents a group of evolutionary conserved putative heme-binding proteins that contains a number of members in animal, plant and bacterial species. The structures of the murine form of HEBP1, or p22HBP, and the human form of HEBP2, or SOUL, have been determined in 2006 and 2011 respectively. In this work we discuss the structures of HEBP1 and HEBP2 in light of new X-ray data for heme bound murine HEBP1. The interaction between tetrapyrroles and HEBP1, initially proven to be hydrophobic in nature, was thought to also involve electrostatic interactions between heme propionate groups and positively charged amino acid side chains. However, the new X-ray structure, and results from murine HEBP1 variants and human HEBP1, confirm the hydrophobic nature of the heme-HEBP1 interaction, resulting in Kd values in the low nanomolar range, and rules out any electrostatic stabilization. Results from NMR relaxation time measurements for human HEBP1 describe a rigid globular protein with no change in motional regime upon heme binding. X-ray structures deposited in the PDB for human HEBP2 are very similar to each other and to the new heme-bound murine HEBP1 X-ray structure (backbone rmsd ca. 1 Å). Results from a HSQC spectrum centred on the histidine side chain Nd-proton region for HEBP2 confirm that HEBP2 does not bind heme via H42 as no chemical shift differences were observed upon heme addition for backbone NH and Nd protons. A survey of the functions attributed to HEBP1 and HEBP2 over the last 20 years span a wide range of cellular pathways. Interestingly, many of them are specific to higher eukaryotes, particularly mammals and a potential link between heme release under oxidative stress and human HEBP1 is also examined using recent data. However, at the present moment, trying to relate function to the involvement of heme. |
publishDate |
2021 |
dc.date.none.fl_str_mv |
2021-12-01T00:00:00Z 2021-12-01 2023-02-14T12:20:19Z 2023-12-01T00:00:00Z |
dc.type.status.fl_str_mv |
info:eu-repo/semantics/publishedVersion |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
http://hdl.handle.net/10773/36310 |
url |
http://hdl.handle.net/10773/36310 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
0010-8545 10.1016/j.ccr.2021.214189 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/embargoedAccess |
eu_rights_str_mv |
embargoedAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Elsevier |
publisher.none.fl_str_mv |
Elsevier |
dc.source.none.fl_str_mv |
reponame:Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) instname:Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação instacron:RCAAP |
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Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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RCAAP |
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RCAAP |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) |
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Repositório Científico de Acesso Aberto de Portugal (Repositórios Cientìficos) - Agência para a Sociedade do Conhecimento (UMIC) - FCT - Sociedade da Informação |
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