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All sourcesNASA NTRSDOE OSTI
DOE OSTI2020

Materials Data on PaP2 by Materials Project

PaP2 crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Pa4+ is bonded in a 9-coordinate geometry to nine P2- atoms. There are a spread of Pa–P bond distances ranging from 2.80–2.92 Å. There are two inequivalent P2- sites. In the first P2- site, P2- is bonded to five equivalent Pa4+ atoms to form a mixture of distorted edge and corner-sharing PPa5 trigonal bipyramids. In the second P2- site, P2- is bonded in a 8-coordinate geometry to four equivalent Pa4+ and four equivalent P2- atoms. All P–P bond lengths are 2.73 Å.

36 MATERIALS SCIENCE↗
DOE OSTI2020

Materials Data on PaP2 by Materials Project

PaP2 crystallizes in the tetragonal P4/nmm space group. The structure is three-dimensional. Pa4+ is bonded in a body-centered cubic geometry to eight P2- atoms. There are four shorter (2.87 Å) and four longer (2.88 Å) Pa–P bond lengths. There are two inequivalent P2- sites. In the first P2- site, P2- is bonded in a distorted hexagonal planar geometry to four equivalent Pa4+ and two equivalent P2- atoms. There are one shorter (2.27 Å) and one longer (2.48 Å) P–P bond lengths. In the second P2- site, P2- is bonded in a 6-coordinate geometry to four equivalent Pa4+ and two equivalent P2- atoms.

36 MATERIALS SCIENCE↗
DOE OSTI2022

Purple acid phosphatase2 stimulates a futile cycle of lipid synthesis and degradation, and mitigates the negative growth effects of triacylglycerol accumulation in vegetative tissues

Storage lipids (mostly triacylglycerols, TAGs) serve as an important energy and carbon reserve in plants and hyperaccumulation of TAG in vegetative tissues can cause negative effects on plant growth. Purple acid phosphatase2 (PAP2) was shown previously to affect carbon metabolism and boost plant growth. However, the effects of PAP2 on lipid metabolism remain unknown. Here, we demonstrated PAP2 as a factor that can stimulate a futile cycle of fatty acid (FA) synthesis and degradation and mitigate negative growth effects associated with TAG accumulation in vegetative tissues. Constitutive expression of PAP2 in Arabidopsis thaliana enhanced both lipid synthesis and degradation in leaves and led to substantial increase in seed oil yield. Suppressing lipid degradation in a PAP2-overexpressing line by disrupting sugar-dependent1 (SDP1), a predominant TAG lipase, significantly elevated vegetative TAG content and improved plant growth. Diverting FAs from membrane lipids to TAGs in PAP2-overexpressing plants by constitutively expressing phospholipid:diacylglycerol acyltransferase1 (PDAT1) increased TAG contents to up to 6% of dry weight in vegetative tissues without compromising biomass yield. Overall, these results highlight the potential of combining PAP2 with TAG-promoting factors to enhance carbon assimilation, FA synthesis and allocation to TAGs for optimized plant growth and storage lipid accumulation in vegetative tissues.

59 BASIC BIOLOGICAL SCIENCES↗
DOE OSTI2022

Data for Purple Acid Phosphatase2 Stimulates a Futile Cycle of Lipid Synthesis and Degradation, and Mitigates the Negative Growth Effects of Triacylglycerol Accumulation in Vegetative Tissues

Storage lipids (mostly triacylglycerols, TAGs) serve as an important energy and carbon reserve in plants, and hyperaccumulation of TAG in vegetative tissues can have negative effects on plant growth. Purple acid phosphatase2 (PAP2) was previously shown to affect carbon metabolism and boost plant growth. However, the effects of PAP2 on lipid metabolism remain unknown. Here, we demonstrated that PAP2 can stimulate a futile cycle of fatty acid (FA) synthesis and degradation, and mitigate negative growth effects associated with high accumulation of TAG in vegetative tissues. Constitutive expression of PAP2 in Arabidopsis thaliana enhanced both lipid synthesis and degradation in leaves and led to a substantial increase in seed oil yield. Suppressing lipid degradation in a PAP2-overexpressing line by disrupting sugar-dependent1 (SDP1), a predominant TAG lipase, significantly elevated vegetative TAG content and improved plant growth. Diverting FAs from membrane lipids to TAGs in PAP2-overexpressing plants by constitutively expressing phospholipid:diacylglycerol acyltransferase1 (PDAT1) greatly increased TAG content in vegetative tissues without compromising biomass yield. These results highlight the potential of combining PAP2 with TAG-promoting factors to enhance carbon assimilation, FA synthesis and allocation to TAGs for optimized plant growth and storage lipid accumulation in vegetative tissues.

Biomass Analytics↗