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Alternative names
- Ash and phospholipase C gamma-binding protein
- NAP 4
- NAP 4 Fragment
- NAP-4
- NAP4
- Nck
- Nck Ash and phospholipase C binding protein
- Nck Ash and phospholipase C gamma binding protein
- Nck associated protein 4
- Nck-associated protein 4
- NCKAP4
- SH2 domain containing SOCS box protein
- SOCS 7
- SOCS-7
- SOCS4
- SOCS6
- Socs7
- SOCS7_HUMAN
- Suppressor of cytokine signaling 7
see all
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Function
Regulates signaling cascades probably through protein ubiquitination and/or sequestration. Functions in insulin signaling and glucose homeostasis through IRS1 ubiquitination and subsequent proteasomal degradation. Inhibits also prolactin, growth hormone and leptin signaling by preventing STAT3 and STAT5 activation, sequestering them in the cytoplasm and reducing their binding to DNA. May be a substrate recognition component of a SCF-like E3 ubiquitin-protein ligase complex which mediates the ubiquitination and subsequent proteasomal degradation of target proteins.
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Tissue specificity
Expressed in brain and leukocytes. Also in fetal lung fibroblasts and fetal brain.
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Pathway
Protein modification; protein ubiquitination.
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Sequence similarities
Contains 1 SH2 domain.
Contains 1 SOCS box domain.
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Domain
The SOCS box domain mediates the interaction with the Elongin BC complex, an adapter module in different E3 ubiquitin ligase complexes (By similarity). It is required for IRS1 ubiquitination and subsequent proteasomal degradation.
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Cellular localization
Cytoplasm. Cell membrane. Nucleus. Mostly cytoplasmic, but shuttles between the cytoplasm and the nucleus. Rapidly relocalizes to the nucleus after UV irradiation. Cytoplasmic location depends upon SEPT7 presence.
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Information by UniProt