Fig. 7From: Altered expression of K13 disrupts DNA replication and repair in Plasmodium falciparumProposed model of K13’s biological role. The crystal structure of K13 resembles the E3 ubiquitin substrate ligase adapter Keap1, which is known as a stress response regulator in humans. The structural similarity and the data suggest that K13 functions similarly to Keap1 promoting the inhibition of a pro-growth regulatory unit via ubiquitination of a regulatory element that is subsequently degraded by the proteasome. In this model down-regulation of K13 at 6 h would result in an increased number of functional regulatory units promoting the transcription of pro-growth genes, which would explain the transcriptome shift at 6 h towards latter life-cycle transcriptomesBack to article page