SIN1_PH is a pleckstrin-homology domain found at the C-terminus of SIN1. It is conserved from yeast to humans. PH-domains are involved in intracellular signalling or as constituents of the cytoskeleton. SIN1 (SAPK-interacting protein 1) plays an essential role in signal transduction, anf the PH domain is involved in lipid and membrane binding [2].

1: H, N and C resonance assignments of the conserved region in the middle domain of S. pombe Sin1 protein. Kataoka S, Furuita K, Hattori Y, Kobayashi N, Ikegami T, Shiozaki K, Fujiwara T, Kojima C; Biomol NMR Assign. 2014; [Epub ahead of print] PMID:24610629

2: Human Sin1 contains Ras-binding and pleckstrin homology domains and suppresses Ras signalling. Schroder WA, Buck M, Cloonan N, Hancock JF, Suhrbier A, Sculley T, Bushell G; Cell Signal. 2007;19:1279-1289. PMID:17303383