| First Author | Getty AL | Year | 2011 |
| Journal | Exp Cell Res | Volume | 317 |
| Issue | 1 | Pages | 51-69 |
| PubMed ID | 20850431 | Mgi Jnum | J:167783 |
| Mgi Id | MGI:4880602 | Doi | 10.1016/j.yexcr.2010.09.007 |
| Citation | Getty AL, et al. (2011) A novel interaction of CLN3 with nonmuscle myosin-IIB and defects in cell motility of Cln3(-/-) cells. Exp Cell Res 317(1):51-69 |
| abstractText | Juvenile neuronal ceroid lipofuscinosis (JNCL) is a pediatric lysosomal storage disorder characterized by accumulation of autofluorescent storage material and neurodegeneration, which result from mutations in CLN3. The function of CLN3, a lysosomal membrane protein, is currently unknown. We report that CLN3 interacts with cytoskeleton-associated nonmuscle myosin-IIB. Both CLN3 and myosin-IIB are ubiquitously expressed, yet mutations in either produce dramatic consequences in the CNS such as neurodegeneration in JNCL patients and Cln3(-/-) mouse models, or developmental deficiencies in Myh10(-/-) mice, respectively. A scratch assay revealed a migration defect associated with Cln3(-/-) cells. Inhibition of nonmuscle myosin-II with blebbistatin in WT cells resulted in a phenotype that mimics the Cln3(-/-) migration defect. Moreover, inhibiting lysosome function by treating cells with chloroquine exacerbated the migration defect in Cln3(-/-). Cln3(-/-) cells traversing a transwell filter under gradient trophic factor conditions displayed altered migration, further linking lysosomal function and cell migration. The myosin-IIB distribution in Cln3(-/-) cells is elongated, indicating a cytoskeleton defect caused by the loss of CLN3. In summary, cells lacking CLN3 have defects that suggest altered myosin-IIB activity, supporting a functional and physical interaction between CLN3 and myosin-IIB. We propose that the migration defect in Cln3(-/-) results, in part, from the loss of the CLN3-myosin-IIB interaction. |
