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SOCS (suppressors of cytokine signaling) box of Rab40-like proteins. Rab40 is part of the Rab family of small GTP-binding proteins that form the largest family within the Ras superfamily. Rab proteins regulate vesicular trafficking pathways, behaving as membrane-associated molecular switches. Rab40 is characterized by a SOCS box c-terminal to the GTPase domain. The SOCS boxes interact with Elongins B and C, Cullin-5 or Cullin-2, Rbx-1, and E2. Therefore, SOCS-box-containing proteins probably function as E3 ubiquitin ligases and mediate the degradation of proteins associated through their N-terminal regions.
Jiyao W et al.(2023). "The conserved domain database in 2023.",