2.3.2.B11 | S-ubiquitinyl-[RING-E3-ubiquitin-carrier protein]-L-cysteine + [calmodulin]-L-lysine22 = [RING-E3-ubiquitin-carrier protein]-L-cysteine + N6-ubiquitinyl-[calmodulin]-L-lysine22 |
calmodilin is a small calcium binding protein that is able to transduce an influx of calcium ions to effector proteins. Purified Asr1p E3 ligase, the E1 enzyme and the E2 enzyme UbcH5a are sufficient for in vitro ubiquitylation of calmodulin, requiring a function Asr1p Ring domain. Asr1p specifically ubiquitylates calmodulin |
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