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Table 3 Presence of genes encoding enzymes of the L-arginine-degrading pathways in the genomes of selected marine and freshwater cyanobacteria.

From: Bioinformatic evaluation of L-arginine catabolic pathways in 24 cyanobacteria and transcriptional analysis of genes encoding enzymes of L-arginine catabolism in the cyanobacterium Synechocystis sp. PCC 6803

Pathway L-Arginine decarboxylase
Enzymes A1 A2.1 A2.2 A2.3 A3 A4 A5 A6
Marine species
Prochlorococcus marinus SS 120 + + n.d. + n.d. + + +
Prochlorococcus marinus str. MIT 9211 + + n.d. + n.d. + + +
Prochlorococcus marinus MIT 9312 + + n.d. + n.d. + + +
Prochlorococcus marinus MIT 9313 + + n.d. + n.d. + + +
Prochlorococcus marinus MED 4 + + n.d. + n.d. + + +
Prochlorococcus marinus NATL 2A + + n.d. + n.d. + + +
Synechococcus sp. CC 9605 + + n.d. + n.d. + + +
Synechococcus sp. CC 9902 + + n.d. + n.d. + + +
Synechococcus sp. WH 8102 + + n.d. + n.d. + + +
Synechococcus sp. WH 7805 + + n.d. + n.d. n.d. + +
Synechococcus sp. WH 5701 + + n.d. + n.d. + + +
Synechococcus sp. RS 9917 + + n.d. + n.d. + + +
Crocosphaera watsonii WH 8501 + n.d. n.d. + n.d. + + +
Trichodesmium erythraeum IMS 101 + + n.d. + n.d. + + +
Freshwater species
Synechococcus elongatus sp. PCC 6301 + n.d. + + n.d. + + +
Synechococcus elongatus sp. PCC 7942 + n.d. + + n.d. + + +
Synechococcus Yellowstone sp. A JA-3-3-AB + + n.d. + n.d. + + +
Synechococcus Yellowstone sp. B JA-2-3B'a (2–13) + + n.d. + n.d. + + +
Thermosynechococcus elongatus BP-1 + n.d. + + n.d. + + +
Synechocystis sp. PCC 6803 + + n.d. + n.d. + + +
Gloeobacter violaceus PCC 7421 + n.d. + + n.d. + + +
Nostoc sp. PCC 7120 + + n.d. + n.d. + + +
Nostoc punctiforme PCC 73102 + + n.d. + n.d. + + +
Anabaena variabilis ATCC 29413 + + n.d. + n.d. + + +
  1. L-ornithine is formed from L-arginine by the enzymes arginase or L-arginine amidinotransferase. It is also formed in the 2nd reaction of the L-arginine deiminase pathway. Enzymes A5 and E3 are identical enzymes and both represent a 4-aminobutyrate transaminase. Enzymes A6 and E4 are identical and both represent a succinate semialdehyde dehydrogenase (Fig. 2). Enzymes A2.1, B1, and C1 represent ureohydrolases, and the same gene(s) is (are) annotated as an agmatinase (A2.1), an arginase (B1) or a 4-guanidinobutyrase (E2). The genes encoding the enzymes C1 and D1 are annotated as L-arginine amidinotransferase as well as L-arginine deiminase (see text for further details). N.d. = not detected.