Unlocking the color code: The role of VvBBX44 and VvMYBA1 in regulating grape anthocyanin biosynthesis

Anthocyanins significantly influence grape quality and color, with transcription factors HY5 and MYBA1 playing pivotal roles in their biosynthesis. Recent findings show that VvBBX44, a B-box protein, inhibits anthocyanin production in grapes by suppressing VvHY5 expression, yet the specific regulatory mechanism remains elusive.