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Validation of the solution structure of dimerization domain of PRC1

Cell-cycle dependent proteins are indispensible for the accurate division of cells, a group of proteins called Microtubule-associated proteins (MAPs) are important to cell division as it bind microtubules and participate with other co-factors to form the spindle midbody, which works as the workhorse...

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Autores principales: Tan, Fei, Xu, Jin
Formato: Online Artículo Texto
Lenguaje:English
Publicado: Public Library of Science 2022
Materias:
Acceso en línea:https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9355583/
https://www.ncbi.nlm.nih.gov/pubmed/35930764
http://dx.doi.org/10.1371/journal.pone.0270572
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author Tan, Fei
Xu, Jin
author_facet Tan, Fei
Xu, Jin
author_sort Tan, Fei
collection PubMed
description Cell-cycle dependent proteins are indispensible for the accurate division of cells, a group of proteins called Microtubule-associated proteins (MAPs) are important to cell division as it bind microtubules and participate with other co-factors to form the spindle midbody, which works as the workhorse of cell-division. PRC1 is a distinguishing member of MAPs, as it is a human MAP and works as the key in mediating daughter cell segregation in ana-phase and telo-phase. The physiological significance of PRC1 calls for a high resolution three-dimensional structure. The crystal structure of PRC1 was published but has low resolution (>3 Å) and incomplete sidechains, placing hurdles to understanding the structure-function relationships of PRC1, therefore, we determined the high-resolution solution structure of PRC1’s dimerization domain using NMR spectroscopy. Significant differences between the crystal structure and the solution structure can be observed, the main differences center around the N terminus and the end of the alpha-Helix H2. Furthermore, detailed structure analyses revealed that the hydrophobic core packing of the solution and crystal structures are also different. To validate the solution structure, we used Hydrogen-deuterium exchange experiments that address the structural discrepancies between the crystal and solution structure; we also generated mutants that are key to the differences in the crystal and solution structures, measuring its structural or thermal stability by NMR spectroscopy and Fluorescence Thermal Shift Assays. These results suggest that N terminal residues are key to the integrity of the whole protein, and the solution structure of the dimerization domain better reflects the conformation PRC1 adopted in solution conditions.
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spelling pubmed-93555832022-08-06 Validation of the solution structure of dimerization domain of PRC1 Tan, Fei Xu, Jin PLoS One Research Article Cell-cycle dependent proteins are indispensible for the accurate division of cells, a group of proteins called Microtubule-associated proteins (MAPs) are important to cell division as it bind microtubules and participate with other co-factors to form the spindle midbody, which works as the workhorse of cell-division. PRC1 is a distinguishing member of MAPs, as it is a human MAP and works as the key in mediating daughter cell segregation in ana-phase and telo-phase. The physiological significance of PRC1 calls for a high resolution three-dimensional structure. The crystal structure of PRC1 was published but has low resolution (>3 Å) and incomplete sidechains, placing hurdles to understanding the structure-function relationships of PRC1, therefore, we determined the high-resolution solution structure of PRC1’s dimerization domain using NMR spectroscopy. Significant differences between the crystal structure and the solution structure can be observed, the main differences center around the N terminus and the end of the alpha-Helix H2. Furthermore, detailed structure analyses revealed that the hydrophobic core packing of the solution and crystal structures are also different. To validate the solution structure, we used Hydrogen-deuterium exchange experiments that address the structural discrepancies between the crystal and solution structure; we also generated mutants that are key to the differences in the crystal and solution structures, measuring its structural or thermal stability by NMR spectroscopy and Fluorescence Thermal Shift Assays. These results suggest that N terminal residues are key to the integrity of the whole protein, and the solution structure of the dimerization domain better reflects the conformation PRC1 adopted in solution conditions. Public Library of Science 2022-08-05 /pmc/articles/PMC9355583/ /pubmed/35930764 http://dx.doi.org/10.1371/journal.pone.0270572 Text en © 2022 Tan, Xu https://creativecommons.org/licenses/by/4.0/This is an open access article distributed under the terms of the Creative Commons Attribution License (https://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited.
spellingShingle Research Article
Tan, Fei
Xu, Jin
Validation of the solution structure of dimerization domain of PRC1
title Validation of the solution structure of dimerization domain of PRC1
title_full Validation of the solution structure of dimerization domain of PRC1
title_fullStr Validation of the solution structure of dimerization domain of PRC1
title_full_unstemmed Validation of the solution structure of dimerization domain of PRC1
title_short Validation of the solution structure of dimerization domain of PRC1
title_sort validation of the solution structure of dimerization domain of prc1
topic Research Article
url https://www.ncbi.nlm.nih.gov/pmc/articles/PMC9355583/
https://www.ncbi.nlm.nih.gov/pubmed/35930764
http://dx.doi.org/10.1371/journal.pone.0270572
work_keys_str_mv AT tanfei validationofthesolutionstructureofdimerizationdomainofprc1
AT xujin validationofthesolutionstructureofdimerizationdomainofprc1