A subclass of Ras proteins that regulate the degradation of IκB

Craig Fenwick, Soon Young Na, Reinhard E. Voll, Haihong Zhong, Suhn Young Im, Jae Woon Lee, Sankar Ghosh

Research output: Contribution to journalArticlepeer-review

88 Scopus citations


Small guanosine triphosphatases, typified by the mammalian Ras proteins, play major roles in the regulation of numerous cellular pathways. A subclass of evolutionarily conserved Ras-like proteins was identified, members of which differ from other Ras proteins in containing amino acids at positions 12 and 61 that are similar to those present in the oncogenic forms of Ras. These proteins, κB-Ras1 and κB-Ras2, interact with the PEST domains of IκBα and IκBβ [inhibitors of the transcription factor nuclear factor kappa B (NF-κB)] and decrease their rate of degradation. In cells, κB-Ras proteins are associated only with NF-κB:IκBβ complexes and therefore may provide an explanation for the slower rate of degradation of IκBβ compared with IκBα.

Original languageEnglish (US)
Pages (from-to)869-873
Number of pages5
Issue number5454
StatePublished - Feb 4 2000

ASJC Scopus subject areas

  • General


Dive into the research topics of 'A subclass of Ras proteins that regulate the degradation of IκB'. Together they form a unique fingerprint.

Cite this