Cysteine is not an obligatory intermediate in the biosynthesis of cysteate by Cytophaga johnsonae.
A cysteine auxotroph of Cytophaga johnsonae was able to incorporate sulfur from sulfate into cysteate, and thus into sulfonolipid, in the absence of cysteine synthesis. This indicates that cysteine is not an obligatory intermediate of the cysteate biosynthetic pathway even though cysteine sulfur can be utilized for cysteate synthesis.
Gilmore
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DF
Department of Molecular and Cell Biology, University of Connecticut, Storrs 06269-2131.
Godchaux
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W
Leadbetter
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ER
D000476:Alkanesulfonates / Q000378:metabolism; D017738:Alkanesulfonic Acids; D000603:Amino Acids, Sulfur / Q000096:biosynthesis*; D003544:Cysteic Acid / Q000096:biosynthesis*; D003545:Cysteine / Q000096:biosynthesis*; D003589:Cytophaga / Q000235:genetics / Q000254:growth & development / Q000378:metabolism*; D013431:Sulfates / Q000378:metabolism; D013455:Sulfur / Q000378:metabolism
D000476:Alkanesulfonates; D017738:Alkanesulfonic Acids; D000603:Amino Acids, Sulfur; D013431:Sulfates; D013455:Sulfur; C027502:capnine; D003544:Cysteic Acid; D003545:Cysteine