Table 12 Cellular capacity for de novo dTMP synthesis in mammals and yeast at S-phase.

From: A hybrid stochastic model of folate-mediated one-carbon metabolism: Effect of the common C677T MTHFR variant on de novo thymidylate biosynthesis

 

Human

S. cerevesiae

Genome size

3.0 × 109 bp

1.2 × 107 bp

% AT

59%

61.5%

T bases needed for replication

1.77 × 109 molecules

7.5 × 106 molecules

Length of cell cycle

24 h

2.5 h

Length of S-phase

8 h

0.83 h

Cell volume

8 × 10−13 L (ES cell)

5 × 10−14 L

dTMP synthesis rate required to replicate genome

7.8 µM/min

0.5 µM/min

Measured dTMP synthesis rate (model outcomes)

4.4 µM/min

1.8 µM/min

Ratio of dTMP production relative to dTMP required for replication

0.6

3.6