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Has an important role in stress fiber formation induced by active diaphanous protein homolog 1 (DRF1). Induces microspike formation, in vivo. In vitro, stimulates N-WASP-induced ARP2/3 complex activation in the absence of CDC42. May play an important role in the maintenance of sarcomeres and/or in the assembly of myofibrils into sarcomeres. Implicated in regulation of actin polymerization and cell adhesion. Plays a role in angiogenesis.
Gene References into Functions
Low SPIN90 expression is associated with Breast Cancer. PMID: 28652253
findings suggest that SPIN90 contributes to the formation and movement of endosomal vesicles, and modulates the stability of EGFR protein, which affects cell cycle progression PMID: 24340049
SPIN90 dephosphorylation is a prerequisite step for releasing cofilin so that cofilin can adequately sever actin filaments into monomeric form. PMID: 23765104
Findings show that SPIN90 modulates synaptic activity in neurons as a result of its phosphorylation. PMID: 23342115
Dia2 and DIP co-tether to nascent blebs and this linkage is required for bleb formation. PMID: 23024796
the interaction of the betaPIX.WASP.SPIN90 complex with Nck is crucial for stable cell adhesion and can be dynamically modulated by SPIN90 phosphorylation that is dependent on cell adhesion and ERK activation PMID: 14559906
SPIN90 participates in reorganization of the actin cytoskeleton and in actin-based cell motility PMID: 16253999
These observations point to a pivotal role for DIP in the control of nonbranched and branched actin-filament assembly that is mediated by Diaphanous-related formins and activators of Arp2/3, respectively. PMID: 17398099
DIP binds to and inhibits actin assembly by the FH2 domain of the formin mDia2 PMID: 17398099
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Involvement in disease
A chromosomal aberration involving NCKIPSD/AF3p21 is found in therapy-related leukemia. Translocation t(3;11)(p21;q23) with KMT2A/MLL1.
Subcellular Location
Nucleus. Note=Colocalizes with DRF1 at membrane ruffles, and with Nck at Z-disks in mature cardiac myocytes.
Tissue Specificity
Highest expression in heart, brain, skeletal muscle, kidney and liver. Lower levels in placenta, lung, small intestine and leukocytes. Weak expression in colon, thymus and spleen.