Keereetaweep J

References (3)

Title : Interplay between MYZUS PERSICAE-INDUCED LIPASE 1 and OPDA signaling in limiting green peach aphid infestation on Arabidopsis thaliana - Archer_2023_J.Exp.Bot__
Author(s) : Archer L , Mondal HA , Behera S , Twayana M , Patel M , Louis J , Nalam VJ , Keereetaweep J , Chowdhury Z , Shah J
Ref : J Exp Bot , : , 2023
Abstract : MYZUS PERSICAE-INDUCED LIPASE1 (MPL1) encodes a lipase in Arabidopsis thaliana that is required for limiting infestation by the green peach aphid (GPA; Myzus persicae), an important phloem sap-consuming insect pest. Previously, we demonstrated that MPL1 expression was upregulated in response to GPA infestation, and GPA fecundity was higher on the mpl1 mutant, compared to the wild-type (WT), and lower on 35S:MPL1 plants that constitutively expressed MPL1 from the 35S promoter. Here, we show that the MPL1 promoter is active in the phloem and expression of the MPL1 coding sequence from the phloem-specific SUC2 promoter is sufficient to restore resistance to the GPA in mpl1. The GPA infestation-associated upregulation of MPL1 requires CYCLOPHILIN 20-3 (CYP20-3), which encodes a 12-oxo-phytodienoic acid (OPDA)-binding protein that is involved in OPDA signaling and is required for limiting GPA infestation. OPDA promotes MPL1 expression to limit GPA fecundity, a process that requires CYP20-3 function. These results along with our observation that constitutive expression of MPL1 from the 35S promoter restores resistance to the GPA in the cyp20-3 mutant, and MPL1 feedbacks to limit OPDA levels in GPA-infested plants, suggest that an interplay between MPL1, OPDA, and CYP20-3 contributes to resistance to the GPA.
ESTHER : Archer_2023_J.Exp.Bot__
PubMedSearch : Archer_2023_J.Exp.Bot__
PubMedID: 37696760
Gene_locus related to this paper: arath-LIP2

Title : CGI-58, a key regulator of lipid homeostasis and signaling in plants, also regulates polyamine metabolism - Park_2014_Plant.Signal.Behav_9_e27723
Author(s) : Park S , Keereetaweep J , James CN , Gidda SK , Chapman KD , Mullen RT , Dyer JM
Ref : Plant Signal Behav , 9 :e27723 , 2014
Abstract : Comparative Gene Identification-58 (CGI-58) is an alpha/beta hydrolase-type protein that regulates lipid homeostasis and signaling in eukaryotes by interacting with and stimulating the activity of several different types of proteins, including a lipase in mammalian cells and a peroxisomal ABC transporter (PXA1) in plant cells. Here we show that plant CGI-58 also interacts with spermidine synthase 1 (SPDS1), an enzyme that plays a central role in polyamine metabolism by converting putrescine into spermidine. Analysis of polyamine contents in Arabidopsis thaliana plants revealed that spermidine levels were significantly reduced, and putrescine increased, in both cgi-58 and cgi-58/pxa1 mutant plants, relative to pxa1 mutant or wild-type plants. Evaluation of polyamine-related gene expression levels, however, revealed similar increases in transcript abundance in all mutants, including cgi-58, pxa1, and cgi-58/pxa1, in comparison to wild type. Taken together, the data support a model whereby CGI-58 and PXA1 contribute to the regulation of polyamine metabolism at the transcriptional level, perhaps through a shared lipid-signaling pathway, and that CGI-58 also acts independently of PXA1 to increase spermidine content at a post-transcriptional level, possibly through protein-protein interaction with SPDS1.
ESTHER : Park_2014_Plant.Signal.Behav_9_e27723
PubMedSearch : Park_2014_Plant.Signal.Behav_9_e27723
PubMedID: 24492485
Gene_locus related to this paper: arath-LPAAT

Title : The alpha\/beta hydrolase CGI-58 and peroxisomal transport protein PXA1 Coregulate lipid homeostasis and signaling in Arabidopsis - Park_2013_Plant.Cell_25_1726
Author(s) : Park S , Gidda SK , James CN , Horn PJ , Khuu N , Seay DC , Keereetaweep J , Chapman KD , Mullen RT , Dyer JM
Ref : Plant Cell , 25 :1726 , 2013
Abstract : COMPARATIVE GENE IDENTIFICATION-58 (CGI-58) is a key regulator of lipid metabolism and signaling in mammals, but its underlying mechanisms are unclear. Disruption of CGI-58 in either mammals or plants results in a significant increase in triacylglycerol (TAG), suggesting that CGI-58 activity is evolutionarily conserved. However, plants lack proteins that are important for CGI-58 activity in mammals. Here, we demonstrate that CGI-58 functions by interacting with the PEROXISOMAL ABC-TRANSPORTER1 (PXA1), a protein that transports a variety of substrates into peroxisomes for their subsequent metabolism by beta-oxidation, including fatty acids and lipophilic hormone precursors of the jasmonate and auxin biosynthetic pathways. We also show that mutant cgi-58 plants display changes in jasmonate biosynthesis, auxin signaling, and lipid metabolism consistent with reduced PXA1 activity in planta and that, based on the double mutant cgi-58 pxa1, PXA1 is epistatic to CGI-58 in all of these processes. However, CGI-58 was not required for the PXA1-dependent breakdown of TAG in germinated seeds. Collectively, the results reveal that CGI-58 positively regulates many aspects of PXA1 activity in plants and that these two proteins function to coregulate lipid metabolism and signaling, particularly in nonseed vegetative tissues. Similarities and differences of CGI-58 activity in plants versus animals are discussed.
ESTHER : Park_2013_Plant.Cell_25_1726
PubMedSearch : Park_2013_Plant.Cell_25_1726
PubMedID: 23667126
Gene_locus related to this paper: arath-LPAAT