Volume 129, Issue 15 pp. 4256-4260
Zuschrift

Structure of the Complex between a Heparan Sulfate Octasaccharide and Mycobacterial Heparin-Binding Hemagglutinin

Dr. Teng-Yi Huang

Dr. Teng-Yi Huang

Genomics Research Center, Academia Sinica, No. 128, Section 2, Academia Road, Taipei, 115 Taiwan

These authors contributed equally to this work.

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Dr. Deli Irene

Dr. Deli Irene

Department of Chemistry, National Dong Hwa University, No. 1, Section 2, Da Hsueh Road, Shoufeng, Hualien, 974 Taiwan

These authors contributed equally to this work.

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Dr. Medel Manuel L. Zulueta

Dr. Medel Manuel L. Zulueta

Genomics Research Center, Academia Sinica, No. 128, Section 2, Academia Road, Taipei, 115 Taiwan

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Tzu-Jui Tai

Tzu-Jui Tai

Department of Chemistry, National Dong Hwa University, No. 1, Section 2, Da Hsueh Road, Shoufeng, Hualien, 974 Taiwan

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Shih-Han Lain

Shih-Han Lain

Department of Chemistry, National Dong Hwa University, No. 1, Section 2, Da Hsueh Road, Shoufeng, Hualien, 974 Taiwan

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Dr. Cheng-Po Cheng

Dr. Cheng-Po Cheng

Genomics Research Center, Academia Sinica, No. 128, Section 2, Academia Road, Taipei, 115 Taiwan

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Dr. Ping-Xi Tsai

Dr. Ping-Xi Tsai

Genomics Research Center, Academia Sinica, No. 128, Section 2, Academia Road, Taipei, 115 Taiwan

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Dr. Shu-Yi Lin

Dr. Shu-Yi Lin

Genomics Research Center, Academia Sinica, No. 128, Section 2, Academia Road, Taipei, 115 Taiwan

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Dr. Zhi-Geng Chen

Dr. Zhi-Geng Chen

Genomics Research Center, Academia Sinica, No. 128, Section 2, Academia Road, Taipei, 115 Taiwan

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Chiao-Chu Ku

Chiao-Chu Ku

Institute of Molecular Biology, Academia Sinica, No. 128, Section 2, Academia Road, Taipei, 115 Taiwan

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Prof. Dr. Chwan-Deng Hsiao

Prof. Dr. Chwan-Deng Hsiao

Institute of Molecular Biology, Academia Sinica, No. 128, Section 2, Academia Road, Taipei, 115 Taiwan

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Prof. Dr. Chia-Lin Chyan

Corresponding Author

Prof. Dr. Chia-Lin Chyan

Department of Chemistry, National Dong Hwa University, No. 1, Section 2, Da Hsueh Road, Shoufeng, Hualien, 974 Taiwan

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Prof. Dr. Shang-Cheng Hung

Corresponding Author

Prof. Dr. Shang-Cheng Hung

Genomics Research Center, Academia Sinica, No. 128, Section 2, Academia Road, Taipei, 115 Taiwan

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First published: 15 March 2017
Citations: 3

Abstract

Heparin-binding hemagglutinin (HBHA) is a 199 amino acid virulence factor at the envelope of Mycobacterium tuberculosis that contributes to latent tuberculosis. The binding of HBHA to respiratory epithelial cells, which leads to extrapulmonary dissemination of the pathogen, is mediated by cell-surface heparan sulfate (HS). We report the structural characterization of the HBHA/HS complex by NMR spectroscopy. To develop a model for the molecular recognition, the first chemically synthesized uniformly 13C- and 15N-labeled HS octasaccharide and a uniformly 13C- and 15N-labeled form of HBHA were prepared. Residues 180–195 at the C-terminal region of HBHA show large chemical shift perturbation upon association with the octasaccharide. Molecular dynamics simulations conforming to the multidimensional NMR data revealed key electrostatic and even hydrophobic interactions between the binding partners that may aid in the development of agents targeting the binding event.

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