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Table 2 Penicillin V production in shake flask cultures and characteristics of strains where the penicillin cluster was put under the control of the synthetic transcriptional factor

From: Synthetic control devices for gene regulation in Penicillium chrysogenum

Strain no.

Promoter for expression of pcbAB

QUAS elements of pcbAB-pcbC locus

QUAS elements of penDE locus

Penicillin V titer (g/L)a

After 3 days

After 5 days

After 7 days

DS54468

Pc_pcbAB

0.34 ± 0.016

0.48 ± 0.023

0.48 ± 0.006

23

Pc_pcbAB CP

5xQUAS

5xQUAS

0.04 ± 0.001

0.06 ± 0.000

0.07 ± 0.002

24

Pc_pcbAB CP

11xQUAS

5xQUAS

0.05 ± 0.002

0.08 ± 0.001

0.14 ± 0.005

25

Pc_pcbAB full

5xQUAS

5xQUAS

0.14 ± 0.002

0.26 ± 0.002

0.33 ± 0.011

26

Pc_pcbAB full

11xQUAS

5xQUAS

0.20 ± 0.003

0.38 ± 0.003

0.49 ± 0.006

  1. All strains were derived from DS54468
  2. aMean ± SEM of 3 biological replicates, with 3 technical replicates each