PMID- 10437795 OWN - NLM STAT- MEDLINE DCOM- 19990816 LR - 20190621 IS - 0014-5793 (Print) IS - 0014-5793 (Linking) VI - 455 IP - 3 DP - 1999 Jul 23 TI - A complex containing betaTrCP recruits Cdc34 to catalyse ubiquitination of IkappaBalpha. PG - 311-4 AB - Activation of transcription factor NF-kappaB is accomplished by degradation of its inhibitor IkappaBalpha. Signal induced phosphorylation of IkappaBalpha on serine 32 and 36 targets the protein for ubiquitination on lysine 21 and 22. Here we use a phosphorylated peptide substrate representing residues 20-43 of IkappaBalpha to investigate requirements for ubiquitination of IkappaBalpha. Phosphorylation dependent polyubiquitination is carried out by a multiprotein complex containing betaTrCP, Skp1 and Cdc53 (Cull). In the presence of ubiquitin activating enzyme and the protein complex containing betaTrCP, polyubiquitination of IkappaBalpha peptide was dependent on the presence of Cdc34, while Ubc5 only stimulated mono- and di-ubiquitination. FAU - Vuillard, L AU - Vuillard L AD - School of Biomedical Science, University of St. Andrews, Fife, UK. FAU - Nicholson, J AU - Nicholson J FAU - Hay, R T AU - Hay RT LA - eng PT - Journal Article PT - Research Support, Non-U.S. Gov't PL - England TA - FEBS Lett JT - FEBS letters JID - 0155157 RN - 0 (BTRC protein, human) RN - 0 (DNA-Binding Proteins) RN - 0 (I-kappa B Proteins) RN - 0 (Macromolecular Substances) RN - 0 (Multiprotein Complexes) RN - 0 (NF-kappa B) RN - 0 (NFKBIA protein, human) RN - 0 (Peptide Fragments) RN - 0 (Recombinant Proteins) RN - 0 (Ubiquitins) RN - 0 (beta-Transducin Repeat-Containing Proteins) RN - 139874-52-5 (NF-KappaB Inhibitor alpha) RN - EC 2.3.2.23 (CDC34 protein, human) RN - EC 2.3.2.23 (Ubiquitin-Conjugating Enzymes) RN - EC 2.3.2.23 (Ubiquitin-Protein Ligase Complexes) RN - EC 2.3.2.27 (Anaphase-Promoting Complex-Cyclosome) RN - EC 2.3.2.27 (SKP Cullin F-Box Protein Ligases) RN - EC 2.3.2.27 (Ubiquitin-Protein Ligases) RN - EC 3.6.1.- (GTP-Binding Proteins) RN - EC 6.- (Ligases) RN - EC 6.3.2.- (Peptide Synthases) SB - IM MH - Amino Acid Sequence MH - Anaphase-Promoting Complex-Cyclosome MH - Animals MH - COS Cells MH - DNA-Binding Proteins/chemistry/genetics/*metabolism MH - GTP-Binding Proteins/chemistry/genetics/*metabolism MH - Humans MH - *I-kappa B Proteins MH - Ligases/*metabolism MH - Macromolecular Substances MH - Molecular Sequence Data MH - Multiprotein Complexes MH - NF-KappaB Inhibitor alpha MH - NF-kappa B/metabolism MH - Peptide Fragments/chemistry/genetics/metabolism MH - Peptide Synthases/chemistry/metabolism MH - Recombinant Proteins/chemistry/genetics/metabolism MH - SKP Cullin F-Box Protein Ligases MH - Ubiquitin-Conjugating Enzymes MH - *Ubiquitin-Protein Ligase Complexes MH - Ubiquitin-Protein Ligases MH - Ubiquitins/metabolism MH - beta-Transducin Repeat-Containing Proteins EDAT- 1999/08/07 00:00 MHDA- 1999/08/07 00:01 CRDT- 1999/08/07 00:00 PHST- 1999/08/07 00:00 [pubmed] PHST- 1999/08/07 00:01 [medline] PHST- 1999/08/07 00:00 [entrez] AID - S0014579399008959 [pii] AID - 10.1016/s0014-5793(99)00895-9 [doi] PST - ppublish SO - FEBS Lett. 1999 Jul 23;455(3):311-4. doi: 10.1016/s0014-5793(99)00895-9.