Abstract：
:Acyl activating enzyme 3 (AAE3) was identified as being involved in the acetylation pathway of oxalate degradation, which regulates the responses to biotic and abiotic stresses in various higher plants. Here, we investigated the role of Glycine sojaAAE3 (GsAAE3) in Cadmium (Cd) and Aluminum (Al) tolerances. The recombinant GsAAE3 protein showed high activity toward oxalate, with a Km of 105.10 ± 12.30 μM and Vmax of 12.64 ± 0.34 μmol min-1 mg-1 protein, suggesting that it functions as an oxalyl-CoA synthetase. The expression of a GsAAE3-green fluorescent protein (GFP) fusion protein in tobacco leaves did not reveal a specific subcellular localization pattern of GsAAE3. An analysis of the GsAAE3 expression pattern revealed an increase in GsAAE3 expression in response to Cd and Al stresses, and it is mainly expressed in root tips. Furthermore, oxalate accumulation induced by Cd and Al contributes to the inhibition of root growth in wild soybean. Importantly, GsAAE3 overexpression increases Cd and Al tolerances in A. thaliana and soybean hairy roots, which is associated with a decrease in oxalate accumulation. Taken together, our data provide evidence that the GsAAE3-encoded protein plays an important role in coping with Cd and Al stresses.
journal_name
Int J Mol Scijournal_title
International journal of molecular sciencesauthors
Xian P,Cai Z,Cheng Y,Lin R,Lian T,Ma Q,Nian Hdoi
10.3390/ijms21228869subject
Has Abstractpub_date
2020-11-23 00:00:00issue
22issn
1422-0067pii
ijms21228869journal_volume
21pub_type
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