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Gene Review: 

SPA3  -  ubiquitin-protein ligase RFWD2

Arabidopsis thaliana

Synonyms: At3g15354, K7L4.16, Protein SPA1-RELATED 3, SPA1-related 3
 
 
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High impact information on SPA3

  • Mutations in SPA1 cause phyA-independent early flowering under short day (SD) but not long day (LD) conditions, and this phenotype is enhanced by additional loss of SPA3 and SPA4 function [1].
  • In these processes, SPA2, SPA3 and SPA4 have overlapping but distinct functions [2].
  • Enhanced photoresponsiveness of spa3 mutants is also fully dependent on phytochrome A in far-red and blue light, but not in red light [3].

References

  1. Arabidopsis SPA proteins regulate photoperiodic flowering and interact with the floral inducer CONSTANS to regulate its stability. Laubinger, S., Marchal, V., Gentilhomme, J., Wenkel, S., Adrian, J., Jang, S., Kulajta, C., Braun, H., Coupland, G., Hoecker, U. Development (2006) [Pubmed]
  2. Functional and expression analysis of Arabidopsis SPA genes during seedling photomorphogenesis and adult growth. Fittinghoff, K., Laubinger, S., Nixdorf, M., Fackendahl, P., Baumgardt, R.L., Batschauer, A., Hoecker, U. Plant J. (2006) [Pubmed]
  3. The SPA1-like proteins SPA3 and SPA4 repress photomorphogenesis in the light. Laubinger, S., Hoecker, U. Plant J. (2003) [Pubmed]
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