Table I. Peptides phosphorylated by the CSN-associated kinases identified by phosphopeptide analyses with different proteins.
| Protein | Radioactive peptides | Putative P sites | Consensus |
|---|---|---|---|
| c-Jun | 58SDLLTSPDVGLLKLASPELERL79 | Ser63, Ser73 | JNK |
| Thr62 | CK2 | ||
| 115VRALAELHSQNTLPSVTSAAQ135 | ? | No | |
| 53LRAKNSDLLTSPDVGLL69 | Ser63 | JNK | |
| Thr62 | CK2 | ||
| 151GGSGSGGFSASLHSEPPVYANLSNF177 | ? | No | |
| 80IIQSSNGHITTTPTPTQF97 | ? | No | |
| 98LCPKNVTDEQEGFAEGF114 | ? | No | |
| 36QSMTLNLADPVGSLKPH52 | Ser48 | PKC | |
| p53 | 142PVQLWVDSTPPPGTRVRA159 | Thr155 | No |
| 94SSSVPSQKTY103 | Ser99 | PKC | |
| 384MFKTEGPDSD393 | Ser392 | CK2 | |
| ICSBP | 253PPADAIPSERQRQVTRK269 | Ser260 | PKC |
| 93EEVTDRSQLDISEPYK108 | Ser99 | CK2 | |
| IκBα | 271QLTLENLQMLPESEDEESYDTESEFT296 | Ser283 | CK2 |
| Thr291 | CK2 |
ICSBP, interferon consensus sequence binding protein; JNK, Jun-N-terminal kinase. Consensus sequences for CK2 or PKC phosphorylation are indicated in bold. Unknown phosphorylation sites are indicated by ‘?’.