TAP Family: ALOG

Arabidopsis thaliana LSH1 and Oryza G1 proteins are abbreviated with ALOG and also referred to as light-dependent short hypocotyl (LSH) proteins (Lee et al., 2020). These proteins represent a family of TFs which can be found in all land plants and some streptophyte algae (Naramoto et al., 2020). ALOG proteins are involved i.e. in the elongation of the hypocotyl, in the determination of the lateral organ identity and in the conservation of the apical meristems (e.g., (Cho & Zambryski, 2011; Naramoto et al., 2020; Zhao et al., 2004)). (Naramoto et al., 2020) identified, based on the occurrences of ALOG proteins in some streptophyte algae, that the ALOG TF family emerged before the evolution of land plants and is present in species that feature traits like apical growth, plasmodesmata and rhizoids (Naramoto et al., 2020).

This TAP family belongs to the HC3 zinc ribbon factors structural class of the Zinc-coordinating DNA-binding domains structural superclass, as defined in Plant-TFClass (Blanc-Mathieu et al. 2024)

References:

Lee, M., Dong, X., Song, H., Yang, J. Y., Kim, S., & Hur, Y. (2020). Molecular characterization of Arabidopsis thaliana LSH1 and LSH2 genes. Genes & Genomics, 42(10), 1151–1162. https://doi.org/10.1007/s13258-020-00985-x

Naramoto, S., Hata, Y., & Kyozuka, J. (2020). The origin and evolution of the ALOG proteins, members of a plant-specific transcription factor family, in land plants. Journal of Plant Research, 133(3), 323–329. https://doi.org/10.1007/s10265-020-01171-6

Cho, E., & Zambryski, P. C. (2011). ORGAN BOUNDARY1 defines a gene expressed at the junction between the shoot apical meristem and lateral organs. Proceedings of the National Academy of Sciences, 108(5), 2154–2159. https://doi.org/10.1073/pnas.1018542108

Zhao, L., Nakazawa, M., Takase, T., Manabe, K., Kobayashi, M., Seki, M., Shinozaki, K., & Matsui, M. (2004). Overexpression of LSH1, a member of an uncharacterised gene family, causes enhanced light regulation of seedling development. The Plant Journal, 37(5), 694–706. https://doi.org/10.1111/j.1365-313X.2003.01993.x

Blanc-Mathieu, Romain et al. 2024. Plant-TFClass: a structural classification for plant transcription factors. Trends in Plant Science, Volume 29, Issue 1, 40 - 51