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Gene Review

COL3  -  zinc finger protein CONSTANS-LIKE 3

Arabidopsis thaliana

Synonyms: ATCOL3, B-box domain protein 4, BBX4, CONSTANS-like 3, F27A10.10
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High impact information on COL3

  • A green fluorescent protein-COL3 fusion protein colocalizes with COP1 to nuclear speckles when transiently expressed in plant cells [1].
  • Unlike constans, the col3 mutant flowers early and shows a reduced number of lateral branches in short days [1].
  • Further analysis demonstrated that these are most similar to CO-like genes AtCOL3/AtCOL4/AtCOL5, a group of Arabidopsis genes closely related to, but distinct from CO, suggesting that the CO branch of the AtCOL phylogeny does not exist in the Physcomitrella genome [2].

Other interactions of COL3

  • Here, we identify CONSTANS-LIKE3 (COL3) as a novel interaction partner of COP1 [1].


  1. Arabidopsis CONSTANS-LIKE3 is a positive regulator of red light signaling and root growth. Datta, S., Hettiarachchi, G.H., Deng, X.W., Holm, M. Plant Cell (2006) [Pubmed]
  2. The family of CONSTANS-like genes in Physcomitrella patens. Zobell, O., Coupland, G., Reiss, B. Plant biology (Stuttgart, Germany) (2005) [Pubmed]
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