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Literature summary extracted from

  • Prasad, M.E.; Schofield, A.; Lyzenga, W.; Liu, H.; Stone, S.L.
    Arabidopsis RING E3 ligase XBAT32 regulates lateral root production through its role in ethylene biosynthesis (2010), Plant Physiol., 153, 1587-1596.
    View publication on PubMed

Organism

EC Number Organism UniProt Comment Textmining
2.3.2.27 Arabidopsis thaliana Q6NLQ8
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Source Tissue

EC Number Source Tissue Comment Organism Textmining

Substrates and Products (Substrate)

EC Number Substrates Comment Substrates Organism Products Comment (Products) Rev. Reac.
2.3.2.27 S-ubiquitinyl-[E2 ubiquitin-conjugating enzyme]-L-cysteine + [ACS4]-L-lysine ACS4 i.e. aminocyclopropane-1-carboxylic acid synthase 4 Arabidopsis thaliana [E2 ubiquitin-conjugating enzyme]-L-cysteine + N6-ubiquitinyl-[ACS4]-L-lysine
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 ?
2.3.2.27 S-ubiquitinyl-[E2 ubiquitin-conjugating enzyme]-L-cysteine + [ACS7]-L-lysine ACS4 i.e. aminocyclopropane-1-carboxylic acid synthase 7 Arabidopsis thaliana [E2 ubiquitin-conjugating enzyme]-L-cysteine + N6-ubiquitinyl-[ACS7]-L-lysine
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 ?

Synonyms

EC Number Synonyms Comment Organism
2.3.2.27 Xbat32
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 Arabidopsis thaliana

General Information

EC Number General Information Comment Organism
2.3.2.27 physiological function RING E3 Ligase Xbat32 mutants produce significantly more ethylene than wildtype plants and inhibition of ethylene biosynthesis or perception significantly increases Xbat32 lateral root production. Xbat32 interacts with the ethylene biosynthesis enzymes aminocyclopropane-1-carboxylic acid synthases ACS4 and ACS7 in yeast-two-hybrid assays and may negatively regulate ethylene biosynthesis by modulating the abundance of ACS proteins. Loss of Xbat32 may promote the stabilization of ACSs and lead to increased ethylene synthesis and suppression of lateral root formation. Auxin treatments only partially rescue the lateral root defect of Xbat32 mutants, but they completely restore wild-type levels of Xbat32 lateral root production when coupled with ethylene inhibition. Abscisic acid stimulates rather than inhibits mutant Xbat32 lateral root formation, and abscisic acid acts synergistically with auxin to promote mutant Xbat32 lateral root production Arabidopsis thaliana