ASPP proteins discriminate between PP1 catalytic subunits through their SH3 domain and the PP1 C-tail.
Bertran, M.T., Mouilleron, S., Zhou, Y., Bajaj, R., Uliana, F., Kumar, G.S., van Drogen, A., Lee, R., Banerjee, J.J., Hauri, S., O'Reilly, N., Gstaiger, M., Page, R., Peti, W., Tapon, N.(2019) Nat Commun 10: 771-771
- PubMed: 30770806 
- DOI: 10.1038/s41467-019-08686-0
- Primary Citation of Related Structures:  
6GHM - PubMed Abstract: 
Serine/threonine phosphatases such as PP1 lack substrate specificity and associate with a large array of targeting subunits to achieve the requisite selectivity. The tumour suppressor ASPP (apoptosis-stimulating protein of p53) proteins associate with PP1 catalytic subunits and are implicated in multiple functions from transcriptional regulation to cell junction remodelling ...