Component of the BUR kinase complex involved in transcription regulation. This complex phosphorylates 'Ser-120' of the UBC2/RAD6 ubiquitin-conjugating enzyme (E2), leading to monoubiquitination of histone H2B, the localization of the PAF1 complex to the chromatin, and the silencing of telomeric-associated genes. Also required for histone H3 'Lys-4' trimethylation. May phosphorylate the 'Ser-5' of the RBP1 carboxy-terminal domain (CTD) repeats. Necessary for the recovery from pheromone-induced growth arrest in the cell cycle G1 phase. Also required for vegetative growth itself. The kinase activity of the complex requires the presence of BUR2. Overexpression of BUR2 interferes with mitotic chromosome segregation. Belongs to the BUR kinase complex composed of SGV1/BUR1 and BUR2. Interacts with SGV1. Present with 2910 molecules/cell in log phase SD medium.