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New cardiolipin analogs synthesized by phospholipase D-catalyzed transphosphatidylation.

Chemistry and physics of lipids (2012-10-13)
Anna O Müller, Carmen Mrestani-Klaus, Jürgen Schmidt, Renate Ulbrich-Hofmann, Martin Dippe
ABSTRACT

Cardiolipin (CL) and related diphosphatidyl lipids are hardly accessible because of the complexity of their chemical synthesis. In the present paper, the transphosphatidylation reaction catalyzed by phospholipase D (PLD) from Streptomyces sp. has been proven as an alternative enzyme-assisted strategy for the synthesis of new CL analogs. The formation of this type of compounds from phosphatidylcholine was compared for a series of N- and C2-substituted ethanolamine derivatives as well as non-charged alcohols such as glycerol and ethylene glycol. The rapid exchange of the choline head group by ethanolamine derivatives having a low molecular volume (diethanolamine and serinol) gave rise to an efficient production of the corresponding CL analogs. In contrast, the yields were comparably low in the reaction with bulky nitrogenous acceptor alcohols (triethanolamine, tris(hydroxymethyl)aminomethane, tetrakis(hydroxyethyl)ammonium) or the non-charged alcohols. Therefore, a strong dependence of the conversion of the monophosphatidyl to the diphosphatidyl compound on steric parameters and the head group charge was concluded. The enzyme-assisted strategy was used for the preparation of purified diphosphatidyldiethanolamine and diphosphatidylserinol.

MATERIALS
Product Number
Brand
Product Description

Sigma-Aldrich
Phospholipase D from cabbage, Type IV, lyophilized powder, ≥100 units/mg solid
Sigma-Aldrich
Phospholipase D from Arachis hypogaea (peanut), Type II, lyophilized powder, ≥60 units/mg protein
Sigma-Aldrich
Phospholipase D from Streptomyces chromofuscus, ≥50,000 units/mL, buffered aqueous glycerol solution
Sigma-Aldrich
Phospholipase D from Streptomyces sp., Type VII, lyophilized powder, ≥150 units/mg solid

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