CUL7
Cullin-7 is a RING-E3 ligase protein that in humans is encoded by the CUL7 gene. Clinical significance 
It is associated with 3-M syndrome. Interactions
CUL7 has been shown to interact with RBX1. References

Further reading

External links
  GeneReviews/NIH/NCBI/UW entry on 3-M syndrome
  OMIM entries entry on 3-M syndrome