Ligand uptake in Mycobacterium tuberculosis truncated hemoglobins is controlled by both internal tunnels and active site water molecules
- Autores
- Boron, Carlos Ignacio; Bustamante, Juan Pablo; Davidge, Kelly S.; Singh, Sandip; Bowman, Lesley A.H.; Tinajero Trejo, Mariana; Carballal, Sebastián; Radi, Rafael; Poole, Robert K.; Dikshit, Kanak; Estrin, Dario Ariel; Marti, Marcelo Adrian; Boechi, Leonardo
- Año de publicación
- 2015
- Idioma
- inglés
- Tipo de recurso
- artículo
- Estado
- versión publicada
- Descripción
- Mycobacterium tuberculosis, the causative agent of human tuberculosis, has two proteins belonging to the truncated hemoglobin (trHb) family. Mt-trHbN presents well-defined internal hydrophobic tunnels that allow O 2 and •NO to migrate easily from the solvent to the active site, whereas Mt-trHbO possesses tunnels interrupted by a few bulky residues, particularly a tryptophan at position G8. Differential ligand migration rates allow Mt-trHbN to detoxify •NO, a crucial step for pathogen survival once under attack by the immune system, much more efficiently than Mt-trHbO. In order to investigate the differences between these proteins, we performed experimental kinetic measurements, •NO decomposition, as well as molecular dynamics simulations of the wild type Mt-trHbN and two mutants, VG8F and VG8W. These mutations affect both the tunnels accessibility as well as the affinity of distal site water molecules, thus modifying the ligand access to the iron. We found that a single mutation allows Mt-trHbN to acquire ligand migration rates comparable to those observed for Mt-trHbO, confirming that ligand migration is regulated by the internal tunnel architecture as well as by water molecules stabilized in the active site.
Fil: Boron, Carlos Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Biológica; Argentina
Fil: Bustamante, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina
Fil: Davidge, Kelly S.. The University of Nottingham; Reino Unido
Fil: Singh, Sandip. Institute of Microbial Technology; India
Fil: Bowman, Lesley A.H.. University of Oxford; Reino Unido
Fil: Tinajero Trejo, Mariana. The University of Sheffield; Reino Unido
Fil: Carballal, Sebastián. Universidad de la República; Uruguay
Fil: Radi, Rafael. Universidad de la República; Uruguay
Fil: Poole, Robert K.. The University of Sheffield; Reino Unido
Fil: Dikshit, Kanak. Institute of Microbial Technology; India
Fil: Estrin, Dario Ariel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina
Fil: Marti, Marcelo Adrian. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Biológica; Argentina
Fil: Boechi, Leonardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Cálculo; Argentina - Materia
-
LIGAND UPTAKE
MYCOBACTERIUM TUBERCULOSIS
TRUNCATED HEMOGLOBINS - Nivel de accesibilidad
- acceso abierto
- Condiciones de uso
- https://creativecommons.org/licenses/by-nc-sa/2.5/ar/
- Repositorio
- Institución
- Consejo Nacional de Investigaciones Científicas y Técnicas
- OAI Identificador
- oai:ri.conicet.gov.ar:11336/58903
Ver los metadatos del registro completo
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Ligand uptake in Mycobacterium tuberculosis truncated hemoglobins is controlled by both internal tunnels and active site water moleculesBoron, Carlos IgnacioBustamante, Juan PabloDavidge, Kelly S.Singh, SandipBowman, Lesley A.H.Tinajero Trejo, MarianaCarballal, SebastiánRadi, RafaelPoole, Robert K.Dikshit, KanakEstrin, Dario ArielMarti, Marcelo AdrianBoechi, LeonardoLIGAND UPTAKEMYCOBACTERIUM TUBERCULOSISTRUNCATED HEMOGLOBINShttps://purl.org/becyt/ford/1.4https://purl.org/becyt/ford/1Mycobacterium tuberculosis, the causative agent of human tuberculosis, has two proteins belonging to the truncated hemoglobin (trHb) family. Mt-trHbN presents well-defined internal hydrophobic tunnels that allow O 2 and •NO to migrate easily from the solvent to the active site, whereas Mt-trHbO possesses tunnels interrupted by a few bulky residues, particularly a tryptophan at position G8. Differential ligand migration rates allow Mt-trHbN to detoxify •NO, a crucial step for pathogen survival once under attack by the immune system, much more efficiently than Mt-trHbO. In order to investigate the differences between these proteins, we performed experimental kinetic measurements, •NO decomposition, as well as molecular dynamics simulations of the wild type Mt-trHbN and two mutants, VG8F and VG8W. These mutations affect both the tunnels accessibility as well as the affinity of distal site water molecules, thus modifying the ligand access to the iron. We found that a single mutation allows Mt-trHbN to acquire ligand migration rates comparable to those observed for Mt-trHbO, confirming that ligand migration is regulated by the internal tunnel architecture as well as by water molecules stabilized in the active site.Fil: Boron, Carlos Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Biológica; ArgentinaFil: Bustamante, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaFil: Davidge, Kelly S.. The University of Nottingham; Reino UnidoFil: Singh, Sandip. Institute of Microbial Technology; IndiaFil: Bowman, Lesley A.H.. University of Oxford; Reino UnidoFil: Tinajero Trejo, Mariana. The University of Sheffield; Reino UnidoFil: Carballal, Sebastián. Universidad de la República; UruguayFil: Radi, Rafael. Universidad de la República; UruguayFil: Poole, Robert K.. The University of Sheffield; Reino UnidoFil: Dikshit, Kanak. Institute of Microbial Technology; IndiaFil: Estrin, Dario Ariel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; ArgentinaFil: Marti, Marcelo Adrian. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Biológica; ArgentinaFil: Boechi, Leonardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Cálculo; ArgentinaFaculty of 1000 Ltd2015-02info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionhttp://purl.org/coar/resource_type/c_6501info:ar-repo/semantics/articuloapplication/pdfapplication/pdfhttp://hdl.handle.net/11336/58903Boron, Carlos Ignacio; Bustamante, Juan Pablo; Davidge, Kelly S.; Singh, Sandip; Bowman, Lesley A.H.; et al.; Ligand uptake in Mycobacterium tuberculosis truncated hemoglobins is controlled by both internal tunnels and active site water molecules; Faculty of 1000 Ltd; F1000Research; 4; 2-2015; 1-121759-796XCONICET DigitalCONICETenginfo:eu-repo/semantics/altIdentifier/doi/10.12688/f1000research.5921.2info:eu-repo/semantics/altIdentifier/url/https://f1000research.com/articles/4-22/v2info:eu-repo/semantics/openAccesshttps://creativecommons.org/licenses/by-nc-sa/2.5/ar/reponame:CONICET Digital (CONICET)instname:Consejo Nacional de Investigaciones Científicas y Técnicas2025-09-29T09:52:17Zoai:ri.conicet.gov.ar:11336/58903instacron:CONICETInstitucionalhttp://ri.conicet.gov.ar/Organismo científico-tecnológicoNo correspondehttp://ri.conicet.gov.ar/oai/requestdasensio@conicet.gov.ar; lcarlino@conicet.gov.arArgentinaNo correspondeNo correspondeNo correspondeopendoar:34982025-09-29 09:52:17.661CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicasfalse |
dc.title.none.fl_str_mv |
Ligand uptake in Mycobacterium tuberculosis truncated hemoglobins is controlled by both internal tunnels and active site water molecules |
title |
Ligand uptake in Mycobacterium tuberculosis truncated hemoglobins is controlled by both internal tunnels and active site water molecules |
spellingShingle |
Ligand uptake in Mycobacterium tuberculosis truncated hemoglobins is controlled by both internal tunnels and active site water molecules Boron, Carlos Ignacio LIGAND UPTAKE MYCOBACTERIUM TUBERCULOSIS TRUNCATED HEMOGLOBINS |
title_short |
Ligand uptake in Mycobacterium tuberculosis truncated hemoglobins is controlled by both internal tunnels and active site water molecules |
title_full |
Ligand uptake in Mycobacterium tuberculosis truncated hemoglobins is controlled by both internal tunnels and active site water molecules |
title_fullStr |
Ligand uptake in Mycobacterium tuberculosis truncated hemoglobins is controlled by both internal tunnels and active site water molecules |
title_full_unstemmed |
Ligand uptake in Mycobacterium tuberculosis truncated hemoglobins is controlled by both internal tunnels and active site water molecules |
title_sort |
Ligand uptake in Mycobacterium tuberculosis truncated hemoglobins is controlled by both internal tunnels and active site water molecules |
dc.creator.none.fl_str_mv |
Boron, Carlos Ignacio Bustamante, Juan Pablo Davidge, Kelly S. Singh, Sandip Bowman, Lesley A.H. Tinajero Trejo, Mariana Carballal, Sebastián Radi, Rafael Poole, Robert K. Dikshit, Kanak Estrin, Dario Ariel Marti, Marcelo Adrian Boechi, Leonardo |
author |
Boron, Carlos Ignacio |
author_facet |
Boron, Carlos Ignacio Bustamante, Juan Pablo Davidge, Kelly S. Singh, Sandip Bowman, Lesley A.H. Tinajero Trejo, Mariana Carballal, Sebastián Radi, Rafael Poole, Robert K. Dikshit, Kanak Estrin, Dario Ariel Marti, Marcelo Adrian Boechi, Leonardo |
author_role |
author |
author2 |
Bustamante, Juan Pablo Davidge, Kelly S. Singh, Sandip Bowman, Lesley A.H. Tinajero Trejo, Mariana Carballal, Sebastián Radi, Rafael Poole, Robert K. Dikshit, Kanak Estrin, Dario Ariel Marti, Marcelo Adrian Boechi, Leonardo |
author2_role |
author author author author author author author author author author author author |
dc.subject.none.fl_str_mv |
LIGAND UPTAKE MYCOBACTERIUM TUBERCULOSIS TRUNCATED HEMOGLOBINS |
topic |
LIGAND UPTAKE MYCOBACTERIUM TUBERCULOSIS TRUNCATED HEMOGLOBINS |
purl_subject.fl_str_mv |
https://purl.org/becyt/ford/1.4 https://purl.org/becyt/ford/1 |
dc.description.none.fl_txt_mv |
Mycobacterium tuberculosis, the causative agent of human tuberculosis, has two proteins belonging to the truncated hemoglobin (trHb) family. Mt-trHbN presents well-defined internal hydrophobic tunnels that allow O 2 and •NO to migrate easily from the solvent to the active site, whereas Mt-trHbO possesses tunnels interrupted by a few bulky residues, particularly a tryptophan at position G8. Differential ligand migration rates allow Mt-trHbN to detoxify •NO, a crucial step for pathogen survival once under attack by the immune system, much more efficiently than Mt-trHbO. In order to investigate the differences between these proteins, we performed experimental kinetic measurements, •NO decomposition, as well as molecular dynamics simulations of the wild type Mt-trHbN and two mutants, VG8F and VG8W. These mutations affect both the tunnels accessibility as well as the affinity of distal site water molecules, thus modifying the ligand access to the iron. We found that a single mutation allows Mt-trHbN to acquire ligand migration rates comparable to those observed for Mt-trHbO, confirming that ligand migration is regulated by the internal tunnel architecture as well as by water molecules stabilized in the active site. Fil: Boron, Carlos Ignacio. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Biológica; Argentina Fil: Bustamante, Juan Pablo. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina Fil: Davidge, Kelly S.. The University of Nottingham; Reino Unido Fil: Singh, Sandip. Institute of Microbial Technology; India Fil: Bowman, Lesley A.H.. University of Oxford; Reino Unido Fil: Tinajero Trejo, Mariana. The University of Sheffield; Reino Unido Fil: Carballal, Sebastián. Universidad de la República; Uruguay Fil: Radi, Rafael. Universidad de la República; Uruguay Fil: Poole, Robert K.. The University of Sheffield; Reino Unido Fil: Dikshit, Kanak. Institute of Microbial Technology; India Fil: Estrin, Dario Ariel. Consejo Nacional de Investigaciones Científicas y Técnicas. Oficina de Coordinación Administrativa Ciudad Universitaria. Instituto de Química, Física de los Materiales, Medioambiente y Energía. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Química, Física de los Materiales, Medioambiente y Energía; Argentina Fil: Marti, Marcelo Adrian. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Departamento de Química Biológica; Argentina Fil: Boechi, Leonardo. Consejo Nacional de Investigaciones Científicas y Técnicas; Argentina. Universidad de Buenos Aires. Facultad de Ciencias Exactas y Naturales. Instituto de Cálculo; Argentina |
description |
Mycobacterium tuberculosis, the causative agent of human tuberculosis, has two proteins belonging to the truncated hemoglobin (trHb) family. Mt-trHbN presents well-defined internal hydrophobic tunnels that allow O 2 and •NO to migrate easily from the solvent to the active site, whereas Mt-trHbO possesses tunnels interrupted by a few bulky residues, particularly a tryptophan at position G8. Differential ligand migration rates allow Mt-trHbN to detoxify •NO, a crucial step for pathogen survival once under attack by the immune system, much more efficiently than Mt-trHbO. In order to investigate the differences between these proteins, we performed experimental kinetic measurements, •NO decomposition, as well as molecular dynamics simulations of the wild type Mt-trHbN and two mutants, VG8F and VG8W. These mutations affect both the tunnels accessibility as well as the affinity of distal site water molecules, thus modifying the ligand access to the iron. We found that a single mutation allows Mt-trHbN to acquire ligand migration rates comparable to those observed for Mt-trHbO, confirming that ligand migration is regulated by the internal tunnel architecture as well as by water molecules stabilized in the active site. |
publishDate |
2015 |
dc.date.none.fl_str_mv |
2015-02 |
dc.type.none.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion http://purl.org/coar/resource_type/c_6501 info:ar-repo/semantics/articulo |
format |
article |
status_str |
publishedVersion |
dc.identifier.none.fl_str_mv |
http://hdl.handle.net/11336/58903 Boron, Carlos Ignacio; Bustamante, Juan Pablo; Davidge, Kelly S.; Singh, Sandip; Bowman, Lesley A.H.; et al.; Ligand uptake in Mycobacterium tuberculosis truncated hemoglobins is controlled by both internal tunnels and active site water molecules; Faculty of 1000 Ltd; F1000Research; 4; 2-2015; 1-12 1759-796X CONICET Digital CONICET |
url |
http://hdl.handle.net/11336/58903 |
identifier_str_mv |
Boron, Carlos Ignacio; Bustamante, Juan Pablo; Davidge, Kelly S.; Singh, Sandip; Bowman, Lesley A.H.; et al.; Ligand uptake in Mycobacterium tuberculosis truncated hemoglobins is controlled by both internal tunnels and active site water molecules; Faculty of 1000 Ltd; F1000Research; 4; 2-2015; 1-12 1759-796X CONICET Digital CONICET |
dc.language.none.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
info:eu-repo/semantics/altIdentifier/doi/10.12688/f1000research.5921.2 info:eu-repo/semantics/altIdentifier/url/https://f1000research.com/articles/4-22/v2 |
dc.rights.none.fl_str_mv |
info:eu-repo/semantics/openAccess https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
eu_rights_str_mv |
openAccess |
rights_invalid_str_mv |
https://creativecommons.org/licenses/by-nc-sa/2.5/ar/ |
dc.format.none.fl_str_mv |
application/pdf application/pdf |
dc.publisher.none.fl_str_mv |
Faculty of 1000 Ltd |
publisher.none.fl_str_mv |
Faculty of 1000 Ltd |
dc.source.none.fl_str_mv |
reponame:CONICET Digital (CONICET) instname:Consejo Nacional de Investigaciones Científicas y Técnicas |
reponame_str |
CONICET Digital (CONICET) |
collection |
CONICET Digital (CONICET) |
instname_str |
Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.name.fl_str_mv |
CONICET Digital (CONICET) - Consejo Nacional de Investigaciones Científicas y Técnicas |
repository.mail.fl_str_mv |
dasensio@conicet.gov.ar; lcarlino@conicet.gov.ar |
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1844613604553261056 |
score |
13.070432 |