BX24 and BBX25 physically interact with HYH which leads to depletion of HYH molecules from the active pool and thus indirectly reduce the function of HY5 in promoting photomorphogenesis. [BBX25]
Data suggest that BBX25 (At2g31380) and BBX24 (At1g06040) function as transcriptional corepressors probably by forming inactive heterodimers with HY5 (At5g11260) downregulating BBX22 (AT1G78600) expression for the light-mediated seedling development.
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