DNA

Part:BBa_K4621080

Designed by: Ruikang Chen   Group: iGEM23_SCUT-China   (2023-10-04)
Revision as of 11:29, 10 October 2023 by Conerrr (Talk | contribs)


CRISPRi-294

This CRISPRi fragment contains the dCas9 and sgRNA necessary for the CRISPRi system. The CRISPRi system is suitable for a variety of Streptomyces.[1] In this study, it was used to inhibit the expression of GQS52 _ 08040 gene in SCUT-3 to produce more ectoine and hydroxyectoine.

Usage and Biology

Due to the limited types of plasmids available for SCUT-3, we inserted the CRISPRi-62 fragment into the previously constructed plasmid by homologous recombination to achieve simultaneous stable expression of multiple target genes. Subsequently, we verified the effectiveness of the CRISPRi-62 system (Pi2 in the figure below) in the fermentation of ordinary LB and shrimp shells.

fermentation-under-high-salt-environment.png Fig.1 Performance test on CRISPRi strains

fermentation-using-shrimp-shells-p.png Fig. 2 Ectoine/hydroxyectoine production using shrimp shell waste of CRISPRi strains


Sequence and Features


Assembly Compatibility:
  • 10
    INCOMPATIBLE WITH RFC[10]
    Illegal XbaI site found at 30
    Illegal SpeI site found at 4549
    Illegal PstI site found at 18
    Illegal PstI site found at 2443
    Illegal PstI site found at 2677
    Illegal PstI site found at 3889
  • 12
    INCOMPATIBLE WITH RFC[12]
    Illegal NheI site found at 4526
    Illegal SpeI site found at 4549
    Illegal PstI site found at 18
    Illegal PstI site found at 2443
    Illegal PstI site found at 2677
    Illegal PstI site found at 3889
  • 21
    INCOMPATIBLE WITH RFC[21]
    Illegal BglII site found at 482
    Illegal BglII site found at 1277
    Illegal BglII site found at 4046
    Illegal BamHI site found at 222
    Illegal BamHI site found at 1571
    Illegal BamHI site found at 4514
    Illegal BamHI site found at 4719
    Illegal XhoI site found at 895
    Illegal XhoI site found at 3241
  • 23
    INCOMPATIBLE WITH RFC[23]
    Illegal XbaI site found at 30
    Illegal SpeI site found at 4549
    Illegal PstI site found at 18
    Illegal PstI site found at 2443
    Illegal PstI site found at 2677
    Illegal PstI site found at 3889
  • 25
    INCOMPATIBLE WITH RFC[25]
    Illegal XbaI site found at 30
    Illegal SpeI site found at 4549
    Illegal PstI site found at 18
    Illegal PstI site found at 2443
    Illegal PstI site found at 2677
    Illegal PstI site found at 3889
    Illegal NgoMIV site found at 1839
    Illegal NgoMIV site found at 2210
    Illegal NgoMIV site found at 2413
  • 1000
    INCOMPATIBLE WITH RFC[1000]
    Illegal BsaI.rc site found at 3421
    Illegal BsaI.rc site found at 4300
    Illegal SapI site found at 813
    Illegal SapI site found at 2103
    Illegal SapI.rc site found at 3300


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