Irreversibly catalyzes the reduction of fumarate to succinate. Together with the second isozyme of soluble fumarate reductase (FRD1), essential for anaerobic growth. Involved in maintaining redox balance during oxygen deficiency conditions. Reduction of fumarate is the main source of succinate during fermentation, and under anaerobic conditions, the formation of succinate is strictly required for the reoxidation of FADH(2).

Belongs to the FAD-dependent oxidoreductase 2 family. FRD/SDH subfamily.

501 amino acids

MIRSVRRVFIYVSIFVLIIVLKRTLSGTDQTSMKQPVVVIGSGLAGLTTSNRLISKYRIPVVLLDKAASIGGNSIKASSGINGAHTDTQQNLKVMDTPELFLKDTLHSAKGRGVPSLMDKLTKESKSAIRWLQTEFDLKLDLLAQLGGHSVPRTHRSSGKLPPGFEIVQALSKKLKDISSKDSNLVQIMLNSEVVDIELDNQGHVTGVVYMDENGNRKIMKSHHVVFCSGGFGYSKEMLKEYSPNLIHLPTTNGKQTTGDGQKILSKLGAELIDMDQVQVHPTGFIDPNDRENNWKFLAAEALRGLGGILLHPTTGRRFTNELSTRDTVTMEIQSKCPKNDNRALLVMSDKVYENYTNNINFYMSKNLIKKVSINDLIRQYDLQTTASELVTELKSYSDVNTKDTFDRPLIINAFDKDISTESTVYVGEVTPVVHFTMGGVKINEKSQVIKKNSESVLSNGIFAAGEVSGGVHGANRLGGSSLLECVVFGKTAADNIAKLY

55.1 kDa

(Note: Representative image - actual molecular weight may vary depending on tag type and expression method)

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