STAMBPL1 (AMSH-LP) has Lys-63 deubiquitinase activity (Sato et al. 2008) and positively regulates TGF-beta signaling (Ibarolla et al. 2004) but unlike STAMBP (AMSH1) it does not bind STAM (Kikuchi et al. 2003).
Yoshikawa, A, Yamashita, M, Komada, M, Iwai, K, Nureki, O, Ookata, K, Yamagata, A, Sato, Y, Fukai, S, Mimura, H
Lys63-specific deubiquitinase activity of STAMBPL1 [cytosol]
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