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Table 1 Comparison of ThTP- and ATP-synthesizing activity of adenylate kinases from various sources.

From: Adenylate kinase-independent thiamine triphosphate accumulation under severe energy stress in Escherichia coli

Sources ThTP synthesis (pmol min-1 mg-1) ATP synthesis (pmol min-1 mg-1) Ratio ATP/ThTP
AK B. stearothermophilusa 0.2 (pH 6.5) 1.8 × 106 9 × 106
AK E. colia 35 137 × 106 3.9 × 106
AK1 pig skeletal muscleb 570 1055 × 106 1.8 × 106
AK1 chicken skeletal musclec 60 155 × 106 2.6 × 106
Ibid. 265 (pH 10) 155 × 106 0.6 × 106
  1. ThTP synthesis was measured at pH 7.5, except when indicated, as described in the Methods section. The assays for ATP synthesis were done at pH 7.5. a, this study; b, [11]; c, [16]