Literature summary for 4.1.1.65 extracted from

Vences-Guzman, M.A.; Geiger, O.; Sohlenkamp, C.
Sinorhizobium meliloti mutants deficient in phosphatidylserine decarboxylase accumulate phosphatidylserine and are strongly affected during symbiosis with alfalfa (2008), J. Bacteriol., 190, 6846-6856.

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Protein Variants

Protein Variants	Comment	Organism
CS111 mutant	pss-deficient mutant, forms fewer nodules than the wild type on its alfalfa host plant. Membrane lipid composition between mutants and wild type differs	Sinorhizobium meliloti 1021
MAV01 mutant	MAV01/pRK404, MAV01/pTB2086. Sinorhizobial psd gene is deleted, accumulated PS to about 20% of total lipids when grown in complex growth medium, forms fewer nodules than the wild type on its alfalfa host plant. Nodule formation in the mutant MAV01 sets in about 20 days later than that in the wild type. Leaves of alfalfa plants inoculated with the mutant MAV01 are yellowish, indicating that the plants are starved for nitrogen. Membrane lipid composition between mutants and wild type differs	Sinorhizobium meliloti 1021
additional information	properties of PE-deficient mutants lacking either Pss or Psd are compared with those of the Sinorhizobium meliloti wild type. Mutants deficient in phosphatidylserine decarboxylase, accumulate phosphatidylserine and are strongly affected during symbiosis with alfalfa. PE-deficient mutants grow in a wild-type-like manner on many complex media, they are unable to grow on minimal medium containing high phosphate concentrations. The psd-deficient mutant can grow on minimal medium containing low concentrations of inorganic phosphate, while the pss-deficient mutant can not. Addition of choline to the minimal medium rescued growth of the pss-deficient mutant, CS111, to some extent but inhibited growth of the psd-deficient mutant, MAV01	Sinorhizobium meliloti 1021

Natural Substrates/ Products (Substrates)

Natural Substrates	Organism	Comment (Nat. Sub.)	Natural Products	Comment (Nat. Pro.)	Rev.	Reac.
Phosphatidyl-L-serine	Sinorhizobium meliloti 1021	-	Phosphatidylethanolamine + CO2	-	?

Organism

Organism	UniProt	Comment	Textmining
Sinorhizobium meliloti 1021	Q9FDI9	-	-

Substrates and Products (Substrate)

Substrates	Comment Substrates	Organism	Products	Comment (Products)	Rev.	Reac.
Phosphatidyl-L-serine	-	Sinorhizobium meliloti 1021	Phosphatidylethanolamine + CO2	-	?

Synonyms

Synonyms	Comment	Organism
Phosphatidylserine decarboxylase	-	Sinorhizobium meliloti 1021
PS decarboxylase	-	Sinorhizobium meliloti 1021
PSD	-	Sinorhizobium meliloti 1021

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Release 2023.1 (January 2023)