Analysis of Sequence Divergence in Mammalian ABCGs Predicts a Structural Network of Residues That Underlies Functional Divergence
The five members of the mammalian G subfamily of ATP-binding cassette transporters differ greatly in their substrate specificity. Four members of the subfamily are important in lipid transport and the wide substrate specificity of one of the members, ABCG2, is of significance due to its role in multidrug resistance. To explore the origin of substrate selectivity in members 1, 2, 4, 5 and 8 of this subfamily, we have analysed the differences in conservation between members in a multiple sequence alignment of ABCG sequences from mammals. Mapping sets of residues with similar patterns of conservation onto the resolved 3D structure of ABCG2 reveals possible explanations for differences in function, via a connected network of residues from the cytoplasmic to transmembrane domains. In ABCG2, this network of residues may confer extra conformational flexibility, enabling it to transport a wider array of substrates.
| Medienart: |
E-Artikel |
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| Erscheinungsjahr: |
2021 |
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| Erschienen: |
2021 |
| Enthalten in: |
Zur Gesamtaufnahme - volume:22 |
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| Enthalten in: |
International journal of molecular sciences - 22(2021), 6 vom: 16. März |
| Sprache: |
Englisch |
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| Beteiligte Personen: |
Mitchell-White, James I [VerfasserIn] |
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| Links: |
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| Themen: |
ABC transporter |
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| Anmerkungen: |
Date Completed 23.04.2021 Date Revised 23.04.2021 published: Electronic Citation Status MEDLINE |
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| doi: |
10.3390/ijms22063012 |
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| funding: |
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| Förderinstitution / Projekttitel: |
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| PPN (Katalog-ID): |
NLM323649823 |
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| 100 | 1 | |a Mitchell-White, James I |e verfasserin |4 aut | |
| 245 | 1 | 0 | |a Analysis of Sequence Divergence in Mammalian ABCGs Predicts a Structural Network of Residues That Underlies Functional Divergence |
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| 500 | |a Date Revised 23.04.2021 | ||
| 500 | |a published: Electronic | ||
| 500 | |a Citation Status MEDLINE | ||
| 520 | |a The five members of the mammalian G subfamily of ATP-binding cassette transporters differ greatly in their substrate specificity. Four members of the subfamily are important in lipid transport and the wide substrate specificity of one of the members, ABCG2, is of significance due to its role in multidrug resistance. To explore the origin of substrate selectivity in members 1, 2, 4, 5 and 8 of this subfamily, we have analysed the differences in conservation between members in a multiple sequence alignment of ABCG sequences from mammals. Mapping sets of residues with similar patterns of conservation onto the resolved 3D structure of ABCG2 reveals possible explanations for differences in function, via a connected network of residues from the cytoplasmic to transmembrane domains. In ABCG2, this network of residues may confer extra conformational flexibility, enabling it to transport a wider array of substrates | ||
| 650 | 4 | |a Journal Article | |
| 650 | 4 | |a ABC transporter | |
| 650 | 4 | |a ABCG2 | |
| 650 | 4 | |a functional divergence | |
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| 650 | 4 | |a multidrug resistance | |
| 650 | 7 | |a ATP Binding Cassette Transporter, Subfamily G, Member 2 |2 NLM | |
| 700 | 1 | |a Stockner, Thomas |e verfasserin |4 aut | |
| 700 | 1 | |a Holliday, Nicholas |e verfasserin |4 aut | |
| 700 | 1 | |a Briddon, Stephen J |e verfasserin |4 aut | |
| 700 | 1 | |a Kerr, Ian D |e verfasserin |4 aut | |
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| 856 | 4 | 0 | |u http://dx.doi.org/10.3390/ijms22063012 |3 Volltext |
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