A proactive role of water molecules in acceptor recognition by protein O-fucosyltransferase 2
- Valero-González, J. 7
- Leonhard-Melief, C. 3
- Lira-Navarrete, E. 7
- Jiménez-Osés, G. 247
- Hernández-Ruiz, Cristina. 7
- Pallarés, M.C. 7
- Yruela, I. 5
- Vasudevan, D. 3
- Lostao, Anabel. 67
- Corzana, F. 2
- Takeuchi, H. 13
- Haltiwanger, R.S. 13
- Hurtado-Guerrero, R. 678
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1
University of Georgia
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2
Universidad de La Rioja
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3
Stony Brook University
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4
University of California Los Angeles
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5
Estación Experimental de Aula Dei
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- 6 Fundación Agencia Aragonesa Para la Investigación y Desarrollo (ARAID), Zaragoza, Spain
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7
Universidad de Zaragoza
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8
Instituto de Investigación Sanitaria Aragón
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Instituto de Investigación Sanitaria Aragón
Zaragoza, España
ISSN: 1552-4450
Any de publicació: 2016
Volum: 12
Número: 4
Pàgines: 240-246
Tipus: Article
beta Ver similares en nube de resultadosAltres publicacions en: Nature Chemical Biology
Projectes relacionats
2015/00062/001
Resum
Protein O-fucosyltransferase 2 (POFUT2) is an essential enzyme that fucosylates serine and threonine residues of folded thrombospondin type 1 repeats (TSRs). To date, the mechanism by which this enzyme recognizes very dissimilar TSRs has been unclear. By engineering a fusion protein, we report the crystal structure of Caenorhabditis elegans POFUT2 (CePOFUT2) in complex with GDP and human TSR1 that suggests an inverting mechanism for fucose transfer assisted by a catalytic base and shows that nearly half of the TSR1 is embraced by CePOFUT2. A small number of direct interactions and a large network of water molecules maintain the complex. Site-directed mutagenesis demonstrates that POFUT2 fucosylates threonine preferentially over serine and relies on folded TSRs containing the minimal consensus sequence C-X-X-S/T-C. Crystallographic and mutagenesis data, together with atomic-level simulations, uncover a binding mechanism by which POFUT2 promiscuously recognizes the structural fingerprint of poorly homologous TSRs through a dynamic network of water-mediated interactions. © 2016 Nature America, Inc. All rights reserved.