Literature summary for 2.1.1.295 extracted from

Tang, S.; Hass, C.G.; Knapp, S.J.
Ty3/gypsy-like retrotransposon knockout of a 2-methyl-6-phytyl-1,4-benzoquinone methyltransferase is non-lethal, uncovers a cryptic paralogous mutation, and produces novel tocopherol (vitamin E) profiles in sunflower (2006), Theor. Appl. Genet., 113, 783-799.

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Organism

Organism	UniProt	Comment	Textmining
Helianthus annuus	Q2XV86	isoform MT-2	-
Helianthus annuus	Q2XV89	isoform MT-1	-

Substrates and Products (Substrate)

Substrates	Comment Substrates	Organism	Products	Comment (Products)	Rev.	Reac.
S-adenosyl-L-methionine + 2-methyl-6-phytylbenzene-1,4-diol	-	Helianthus annuus	S-adenosyl-L-homocysteine + 2,3-dimethyl-6-phytylbenzene-1,4-diol	-	?

Synonyms

Synonyms	Comment	Organism
MT-1	-	Helianthus annuus
MT-2	-	Helianthus annuus

General Information

General Information	Comment	Organism
physiological function	an isoform MT-1 homozygous mutant is non-lethal and produces 24-45% alpha-tocopherol and 55-74% beta-tocopherol as compared to 96% alpha- and 4% beta-tocopherol for wild-type	Helianthus annuus
physiological function	isoform MT-2 compensates for the loss of isoform MT-1 function, and the MT-2 mutation profoundly affects the synthesis of tocopherols without adversely affecting the synthesis of plastoquinone crucial for normal plant growth and development	Helianthus annuus

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Release 2023.1 (January 2023)