title: A small-molecule inhibitor shows that pirin regulates migration of melanoma cells.
abstract: The discovery of small molecules that bind to a specific target and disrupt the function of proteins is an important step in chemical biology, especially for poorly characterized proteins. Human pirin is a nuclear protein of unknown function that is widely expressed in punctate subnuclear structures in human tissues. Here, we report the discovery of a small molecule that binds to pirin. We determined how the small molecule bound to pirin by solving the cocrystal structure. Either knockdown of pirin or treatment with the small molecule inhibited melanoma cell migration. Thus, inhibition of pirin by the small molecule has led to a greater understanding of the function of pirin and represents a new method of studying pirin-mediated signaling pathways.
authors: Chemical Library Validation Team, Chemical Biology Core Facility, Chemical Biology Department, RIKEN Advanced Science Institute, Wako, Saitama, Japan.
authors: Isao
authors: I
authors: Miyazaki
authors: Siro
authors: S
authors: Simizu
authors: Hideo
authors: H
authors: Okumura
authors: Satoshi
authors: S
authors: Takagi
authors: Hiroyuki
authors: H
authors: Osada
mesh_terms: D000081242:B-Cell Lymphoma 3 Protein; D001665:Binding Sites; D002352:Carrier Proteins / Q000037:antagonists & inhibitors* / Q000235:genetics / Q000378:metabolism*; D002460:Cell Line; D045744:Cell Line, Tumor; D002465:Cell Movement / Q000187:drug effects* / Q000502:physiology*; D018360:Crystallography, X-Ray; D049308:Dioxygenases; D015536:Down-Regulation / Q000187:drug effects; D004791:Enzyme Inhibitors / Q000737:chemistry* / Q000378:metabolism / Q000494:pharmacology*; D015972:Gene Expression Regulation, Neoplastic / Q000187:drug effects; D055785:Gene Knockdown Techniques; D006801:Humans; D008545:Melanoma / Q000473:pathology*; D008958:Models, Molecular; D009687:Nuclear Proteins / Q000037:antagonists & inhibitors* / Q000172:deficiency / Q000235:genetics / Q000378:metabolism*; D011401:Promoter Regions, Genetic / Q000235:genetics; D011485:Protein Binding / Q000187:drug effects; D011518:Proto-Oncogene Proteins / Q000378:metabolism; D015398:Signal Transduction / Q000187:drug effects / Q000502:physiology; D000071250:Snail Family Transcription Factors; D013449:Sulfonamides / Q000737:chemistry / Q000378:metabolism / Q000494:pharmacology; D014157:Transcription Factors / Q000235:genetics / Q000378:metabolism
chemical_list: D000081242:B-Cell Lymphoma 3 Protein; C000631344:BCL3 protein, human; D002352:Carrier Proteins; D004791:Enzyme Inhibitors; D009687:Nuclear Proteins; D011518:Proto-Oncogene Proteins; D000071250:Snail Family Transcription Factors; D013449:Sulfonamides; D014157:Transcription Factors; D049308:Dioxygenases; C105340:PIR protein, human