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. 2014 Aug 23;3(1):135–145. doi: 10.1002/wdev.126

Figure 1.

Figure 1

Domain architectures of AFL and VAL B3 transcription factors. The AFL and VAL groups are sister clades in the ABI3/VP1 family of B3 proteins in Arabidopsis. AFL and VAL proteins have distinct domain architectures: B3 domain (dark), B1 (green), B2 (blue), A1 (purple), PHD-L domain (red), CW domain (orange), and EAR motif (yellow). ABI3 has an N-terminal co-activator/co-repressor (COAR) domain that physically interacts with ABI5-related-bZIP factors. VAL3 has an incomplete PHD-L domain (dashed circle). AFL B3 domains specifically bind to the Sph/RY motif (CATGCA), and VAL B3 domains are proposed to bind the same motif. PHD and CW-Zf domains are identified as the histone modification readers that recognize the H3K4me3 mark. VAL2 CW-Zf interacts with HDA19 to repress target gene transcription (see text). EAR motif may mediate the interaction of VAL1 with co-repressor SNL1 (see text).