Heparan Sulfate Organizes Neuronal Synapses through Neurexin Partnerships
Synapses are fundamental units of communication in the brain. The prototypical synapse-organizing complex neurexin-neuroligin mediates synapse development and function and is central to a shared genetic risk pathway in autism and schizophrenia. Neurexin's role in synapse development is thought...
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| Vydané v: | Cell Ročník 174; číslo 6; s. 1450 |
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| Hlavní autori: | , , , , , , , , , , , , , , , , , |
| Médium: | Journal Article |
| Jazyk: | English |
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United States
06.09.2018
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| ISSN: | 1097-4172, 1097-4172 |
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| Abstract | Synapses are fundamental units of communication in the brain. The prototypical synapse-organizing complex neurexin-neuroligin mediates synapse development and function and is central to a shared genetic risk pathway in autism and schizophrenia. Neurexin's role in synapse development is thought to be mediated purely by its protein domains, but we reveal a requirement for a rare glycan modification. Mice lacking heparan sulfate (HS) on neurexin-1 show reduced survival, as well as structural and functional deficits at central synapses. HS directly binds postsynaptic partners neuroligins and LRRTMs, revealing a dual binding mode involving intrinsic glycan and protein domains for canonical synapse-organizing complexes. Neurexin HS chains also bind novel ligands, potentially expanding the neurexin interactome to hundreds of HS-binding proteins. Because HS structure is heterogeneous, our findings indicate an additional dimension to neurexin diversity, provide a molecular basis for fine-tuning synaptic function, and open therapeutic directions targeting glycan-binding motifs critical for brain development. |
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| AbstractList | Synapses are fundamental units of communication in the brain. The prototypical synapse-organizing complex neurexin-neuroligin mediates synapse development and function and is central to a shared genetic risk pathway in autism and schizophrenia. Neurexin's role in synapse development is thought to be mediated purely by its protein domains, but we reveal a requirement for a rare glycan modification. Mice lacking heparan sulfate (HS) on neurexin-1 show reduced survival, as well as structural and functional deficits at central synapses. HS directly binds postsynaptic partners neuroligins and LRRTMs, revealing a dual binding mode involving intrinsic glycan and protein domains for canonical synapse-organizing complexes. Neurexin HS chains also bind novel ligands, potentially expanding the neurexin interactome to hundreds of HS-binding proteins. Because HS structure is heterogeneous, our findings indicate an additional dimension to neurexin diversity, provide a molecular basis for fine-tuning synaptic function, and open therapeutic directions targeting glycan-binding motifs critical for brain development.Synapses are fundamental units of communication in the brain. The prototypical synapse-organizing complex neurexin-neuroligin mediates synapse development and function and is central to a shared genetic risk pathway in autism and schizophrenia. Neurexin's role in synapse development is thought to be mediated purely by its protein domains, but we reveal a requirement for a rare glycan modification. Mice lacking heparan sulfate (HS) on neurexin-1 show reduced survival, as well as structural and functional deficits at central synapses. HS directly binds postsynaptic partners neuroligins and LRRTMs, revealing a dual binding mode involving intrinsic glycan and protein domains for canonical synapse-organizing complexes. Neurexin HS chains also bind novel ligands, potentially expanding the neurexin interactome to hundreds of HS-binding proteins. Because HS structure is heterogeneous, our findings indicate an additional dimension to neurexin diversity, provide a molecular basis for fine-tuning synaptic function, and open therapeutic directions targeting glycan-binding motifs critical for brain development. Synapses are fundamental units of communication in the brain. The prototypical synapse-organizing complex neurexin-neuroligin mediates synapse development and function and is central to a shared genetic risk pathway in autism and schizophrenia. Neurexin's role in synapse development is thought to be mediated purely by its protein domains, but we reveal a requirement for a rare glycan modification. Mice lacking heparan sulfate (HS) on neurexin-1 show reduced survival, as well as structural and functional deficits at central synapses. HS directly binds postsynaptic partners neuroligins and LRRTMs, revealing a dual binding mode involving intrinsic glycan and protein domains for canonical synapse-organizing complexes. Neurexin HS chains also bind novel ligands, potentially expanding the neurexin interactome to hundreds of HS-binding proteins. Because HS structure is heterogeneous, our findings indicate an additional dimension to neurexin diversity, provide a molecular basis for fine-tuning synaptic function, and open therapeutic directions targeting glycan-binding motifs critical for brain development. |
| Author | Zhang, Peng Archer-Hartmann, Stephanie Sabatini, Bernardo L Craig, Ann Marie Wu, Wenlan Yoshida, Keitaro Pines, Mary K Tanaka, Kenji F Aricescu, A Radu Ge, Yuan Lu, Hong Siddiqui, Tabrez J Gordon, Michael D Peixoto, Rui T Xie, Yicheng Azadi, Parastoo Oku, Shinichiro Wong, Rachel O L |
| Author_xml | – sequence: 1 givenname: Peng surname: Zhang fullname: Zhang, Peng email: peng.pengzhang@gmail.com organization: Djavad Mowafaghian Centre for Brain Health and Department of Psychiatry, University of British Columbia, Vancouver, BC V6T 2B5, Canada. Electronic address: peng.pengzhang@gmail.com – sequence: 2 givenname: Hong surname: Lu fullname: Lu, Hong organization: Djavad Mowafaghian Centre for Brain Health and Department of Psychiatry, University of British Columbia, Vancouver, BC V6T 2B5, Canada – sequence: 3 givenname: Rui T surname: Peixoto fullname: Peixoto, Rui T organization: Howard Hughes Medical Institute, Harvard Medical School, Department of Neurobiology, Boston, MA 02115, USA; Istituto Italiano di Tecnologia, Genova 16163, Italy – sequence: 4 givenname: Mary K surname: Pines fullname: Pines, Mary K organization: Department of Zoology and Life Sciences Institute, University of British Columbia, Vancouver, BC V6T 1Z3, Canada – sequence: 5 givenname: Yuan surname: Ge fullname: Ge, Yuan organization: Djavad Mowafaghian Centre for Brain Health and Department of Psychiatry, University of British Columbia, Vancouver, BC V6T 2B5, Canada – sequence: 6 givenname: Shinichiro surname: Oku fullname: Oku, Shinichiro organization: Djavad Mowafaghian Centre for Brain Health and Department of Psychiatry, University of British Columbia, Vancouver, BC V6T 2B5, Canada – sequence: 7 givenname: Tabrez J surname: Siddiqui fullname: Siddiqui, Tabrez J organization: Djavad Mowafaghian Centre for Brain Health and Department of Psychiatry, University of British Columbia, Vancouver, BC V6T 2B5, Canada – sequence: 8 givenname: Yicheng surname: Xie fullname: Xie, Yicheng organization: Djavad Mowafaghian Centre for Brain Health and Department of Psychiatry, University of British Columbia, Vancouver, BC V6T 2B5, Canada – sequence: 9 givenname: Wenlan surname: Wu fullname: Wu, Wenlan organization: Djavad Mowafaghian Centre for Brain Health and Department of Psychiatry, University of British Columbia, Vancouver, BC V6T 2B5, Canada; Medical School, Henan University of Science and Technology, Luoyang 471023, China – sequence: 10 givenname: Stephanie surname: Archer-Hartmann fullname: Archer-Hartmann, Stephanie organization: Complex Carbohydrate Research Center, University of Georgia, Athens, GA 30602, USA – sequence: 11 givenname: Keitaro surname: Yoshida fullname: Yoshida, Keitaro organization: Department of Neuropsychiatry, Keio University School of Medicine, Tokyo 160-8582, Japan – sequence: 12 givenname: Kenji F surname: Tanaka fullname: Tanaka, Kenji F organization: Department of Neuropsychiatry, Keio University School of Medicine, Tokyo 160-8582, Japan – sequence: 13 givenname: A Radu surname: Aricescu fullname: Aricescu, A Radu organization: MRC Laboratory of Molecular Biology, Cambridge Biomedical Campus, Cambridge CB2 0QH, UK – sequence: 14 givenname: Parastoo surname: Azadi fullname: Azadi, Parastoo organization: Complex Carbohydrate Research Center, University of Georgia, Athens, GA 30602, USA – sequence: 15 givenname: Michael D surname: Gordon fullname: Gordon, Michael D organization: Department of Zoology and Life Sciences Institute, University of British Columbia, Vancouver, BC V6T 1Z3, Canada – sequence: 16 givenname: Bernardo L surname: Sabatini fullname: Sabatini, Bernardo L organization: Howard Hughes Medical Institute, Harvard Medical School, Department of Neurobiology, Boston, MA 02115, USA – sequence: 17 givenname: Rachel O L surname: Wong fullname: Wong, Rachel O L organization: Department of Biological Structure, University of Washington, Seattle, WA 98195, USA – sequence: 18 givenname: Ann Marie surname: Craig fullname: Craig, Ann Marie email: acraig@mail.ubc.ca organization: Djavad Mowafaghian Centre for Brain Health and Department of Psychiatry, University of British Columbia, Vancouver, BC V6T 2B5, Canada. Electronic address: acraig@mail.ubc.ca |
| BackLink | https://www.ncbi.nlm.nih.gov/pubmed/30100184$$D View this record in MEDLINE/PubMed |
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| Keywords | LRRTM heparan sulphate synaptic transmission thorny excrescence mossy fiber synaptogenesis neurexin neuroligin proteoglycan synaptic adhesion protein |
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| Title | Heparan Sulfate Organizes Neuronal Synapses through Neurexin Partnerships |
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