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Two Crystal Structures of Bombyx mori Lipoprotein 3 - Structural Characterization of a New 30-kDa Lipoprotein Family Member

The 30-kDa family of lipoproteins from insect hemolymph has been the focus of a number of studies over the last few years. Recently, four crystal structures of Bombyx mori lipoprotein 7 have been determined. Here we report two crystal structures of another member of the 30-kDa lipoprotein family, Bo...

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Autores principales: Pietrzyk, Agnieszka J., Bujacz, Anna, Mueller-Dieckmann, Jochen, Lochynska, Malgorzata, Jaskolski, Mariusz, Bujacz, Grzegorz
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2013
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3628942/
https://www.ncbi.nlm.nih.gov/pubmed/23613829
http://dx.doi.org/10.1371/journal.pone.0061303
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author Pietrzyk, Agnieszka J.
Bujacz, Anna
Mueller-Dieckmann, Jochen
Lochynska, Malgorzata
Jaskolski, Mariusz
Bujacz, Grzegorz
author_facet Pietrzyk, Agnieszka J.
Bujacz, Anna
Mueller-Dieckmann, Jochen
Lochynska, Malgorzata
Jaskolski, Mariusz
Bujacz, Grzegorz
author_sort Pietrzyk, Agnieszka J.
collection PubMed
description The 30-kDa family of lipoproteins from insect hemolymph has been the focus of a number of studies over the last few years. Recently, four crystal structures of Bombyx mori lipoprotein 7 have been determined. Here we report two crystal structures of another member of the 30-kDa lipoprotein family, Bombyx mori lipoprotein 3 (Bmlp3). The protein was isolated from its natural source, mulberry silkworm hemolymph. It crystallized in two different crystal forms, Bmlp3-p21 (space group P2(1)) and Bmlp3-c2 (space group C2). The crystal structures were solved by molecular replacement using the coordinates of Bmlp7 as a starting model. The crystals of Bmlp3-p21 diffracted X-rays to 2.4 Å resolution and of Bmlp3-c2 to 2.1 Å resolution. Bmlp3 has an overall fold characteristic of 30-kDa lipoproteins, with a VHS-type N-terminal domain and β-trefoil C-terminal domain. Structural comparison of Bmlp3 and Bmlp7 shows that the loops present in the C-terminal domain are flexible and participate in dimer formation. Additionally, new putative binding sites of Bmlp3 have been analyzed in detail and the electrostatic potential of the protein surface at physiological pH 7.4 conditions has been calculated. The results of these calculations are the starting point for an explanation of the recently reported cell-penetrating properties of the 30-kDa lipoproteins.
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spelling pubmed-36289422013-04-23 Two Crystal Structures of Bombyx mori Lipoprotein 3 - Structural Characterization of a New 30-kDa Lipoprotein Family Member Pietrzyk, Agnieszka J. Bujacz, Anna Mueller-Dieckmann, Jochen Lochynska, Malgorzata Jaskolski, Mariusz Bujacz, Grzegorz PLoS One Research Article The 30-kDa family of lipoproteins from insect hemolymph has been the focus of a number of studies over the last few years. Recently, four crystal structures of Bombyx mori lipoprotein 7 have been determined. Here we report two crystal structures of another member of the 30-kDa lipoprotein family, Bombyx mori lipoprotein 3 (Bmlp3). The protein was isolated from its natural source, mulberry silkworm hemolymph. It crystallized in two different crystal forms, Bmlp3-p21 (space group P2(1)) and Bmlp3-c2 (space group C2). The crystal structures were solved by molecular replacement using the coordinates of Bmlp7 as a starting model. The crystals of Bmlp3-p21 diffracted X-rays to 2.4 Å resolution and of Bmlp3-c2 to 2.1 Å resolution. Bmlp3 has an overall fold characteristic of 30-kDa lipoproteins, with a VHS-type N-terminal domain and β-trefoil C-terminal domain. Structural comparison of Bmlp3 and Bmlp7 shows that the loops present in the C-terminal domain are flexible and participate in dimer formation. Additionally, new putative binding sites of Bmlp3 have been analyzed in detail and the electrostatic potential of the protein surface at physiological pH 7.4 conditions has been calculated. The results of these calculations are the starting point for an explanation of the recently reported cell-penetrating properties of the 30-kDa lipoproteins. Public Library of Science 2013-04-16 /pmc/articles/PMC3628942/ /pubmed/23613829 http://dx.doi.org/10.1371/journal.pone.0061303 Text en © 2013 Pietrzyk et al http://creativecommons.org/licenses/by/4.0/ This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are properly credited.
spellingShingle Research Article
Pietrzyk, Agnieszka J.
Bujacz, Anna
Mueller-Dieckmann, Jochen
Lochynska, Malgorzata
Jaskolski, Mariusz
Bujacz, Grzegorz
Two Crystal Structures of Bombyx mori Lipoprotein 3 - Structural Characterization of a New 30-kDa Lipoprotein Family Member
title Two Crystal Structures of Bombyx mori Lipoprotein 3 - Structural Characterization of a New 30-kDa Lipoprotein Family Member
title_full Two Crystal Structures of Bombyx mori Lipoprotein 3 - Structural Characterization of a New 30-kDa Lipoprotein Family Member
title_fullStr Two Crystal Structures of Bombyx mori Lipoprotein 3 - Structural Characterization of a New 30-kDa Lipoprotein Family Member
title_full_unstemmed Two Crystal Structures of Bombyx mori Lipoprotein 3 - Structural Characterization of a New 30-kDa Lipoprotein Family Member
title_short Two Crystal Structures of Bombyx mori Lipoprotein 3 - Structural Characterization of a New 30-kDa Lipoprotein Family Member
title_sort two crystal structures of bombyx mori lipoprotein 3 - structural characterization of a new 30-kda lipoprotein family member
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC3628942/
https://www.ncbi.nlm.nih.gov/pubmed/23613829
http://dx.doi.org/10.1371/journal.pone.0061303
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