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Background

Disrupted in schizophrenia 1 (DISC1) has been implicated in a number of psychiatric diseases along with neurodevelopmental phenotypes such as the proliferation and differentiation of neural progenitor cells. While there has been significant effort directed toward understanding the function of DISC1 through the determination of its protein-protein interactions within an in vitro setting, endogenous interactions involving DISC1 within a cell type-specific setting relevant to neural development remain unclear.

Methods

Using CRISPR/Cas9 (clustered regularly interspaced short palindromic repeats/CRISPR-associated protein 9) genome engineering technology, we inserted an endogenous 3X-FLAG tag at the C-terminus of the canonical DISC1 gene in human induced pluripotent stem cells (iPSCs). We further differentiated these cells and used affinity purification to determine protein-protein interactions involving DISC1 in iPSC-derived neural progenitor cells and astrocytes.

Results

We were able to determine 151 novel cell type-specific proteins present in DISC1 endogenous interactomes. The DISC1 interactomes can be clustered into several subcomplexes that suggest novel DISC1 cell-specific functions. In addition, the DISC1 interactome in iPSC-derived neural progenitor cells associates in a connected network containing proteins found to harbor de novo mutations in patients affected by schizophrenia and contains a subset of novel interactions that are known to harbor syndromic mutations in neurodevelopmental disorders.

Conclusions

Endogenous DISC1 interactomes within iPSC-derived human neural progenitor cells and astrocytes are able to provide context to DISC1 function in a cell type-specific setting relevant to neural development and enables the integration of psychiatric disease risk factors within a set of defined molecular functions."xsd:string
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http://purl.uniprot.org/citations/29961565http://purl.uniprot.org/core/author"Zheng D."xsd:string
http://purl.uniprot.org/citations/29961565http://purl.uniprot.org/core/author"Wilkinson B."xsd:string
http://purl.uniprot.org/citations/29961565http://purl.uniprot.org/core/author"Knowles J.A."xsd:string
http://purl.uniprot.org/citations/29961565http://purl.uniprot.org/core/author"Evgrafov O.V."xsd:string
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http://purl.uniprot.org/citations/29961565http://purl.uniprot.org/core/author"Graham N.A."xsd:string
http://purl.uniprot.org/citations/29961565http://purl.uniprot.org/core/author"Coba M.P."xsd:string
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http://purl.uniprot.org/citations/29961565http://purl.uniprot.org/core/date"2019"xsd:gYear
http://purl.uniprot.org/citations/29961565http://purl.uniprot.org/core/name"Biol Psychiatry"xsd:string
http://purl.uniprot.org/citations/29961565http://purl.uniprot.org/core/pages"305-316"xsd:string
http://purl.uniprot.org/citations/29961565http://purl.uniprot.org/core/title"Endogenous Cell Type-Specific Disrupted in Schizophrenia 1 Interactomes Reveal Protein Networks Associated With Neurodevelopmental Disorders."xsd:string
http://purl.uniprot.org/citations/29961565http://purl.uniprot.org/core/volume"85"xsd:string
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