Part:BBa_K300000

BioBrick integrative base vector for E. coli

BBa_K300000 is an integrative base vector backbone which can be used to integrate the desired BioBrick parts/devices/systems into the genome of E. coli. This base vector can specialized to target the desired integration site in the host genome.

The default version of this backbone has the Phi80 attP (BBa_K300991) as integration site.

This vector enables multiple integrations in the genome of the same strain.

Glossary

The passenger is the desired DNA part to be integrated into the genome.

The guide is the DNA sequence that is used to target the passenger into a specific locus in the genome.

How to propagate it before performing genome integration

The default version of this vector contains the BBa_I52002 insert, so it *must* be propagated in a ccdB-tolerant strain such as DB3.1 (BBa_V1005).

After the insertion of the desired BioBrick part in the cloning site, this vector does not contain a standard replication origin anymore, so it *must* be propagated in a pir+ or pir-116 strain such as BW25141 (BBa_K300984) or BW23474 (BBa_K300985) that can replicate the R6K conditional origin (BBa_J61001).

How to engineer it

1. Be sure to have the desired guide in the RFC10 standard or a compatible one (Fig.1-a).
2. Digest the guide with XbaI-SpeI (Fig.1-b).
3. Digest the integrative base vector BBa_K300000 with NheI (Fig.1-c) and dephosphorylate the linearized vector to prevent re-ligation.
4. Ligate the digestion products (Fig.1-d). XbaI, SpeI and NheI all have compatible protruding ends. Note that the ligation is not directional, but the guide can work in both directions.
5. Transform the ligation in a ccdB-tolerant strain and screen the clone.

1. Be sure to have the desired passenger in the RFC10 standard or a compatible one (Fig.2-a).
2. Digest the passenger with EcoRI-PstI (Fig.2-b).
3. Digest the integrative base vector BBa_K300000 with EcoRI-PstI (Fig.2-c).
4. Ligate the digestion products (Fig.2-d).
5. Transform the ligation in a pir+/pir-116 strain. Transformants with the uncut plasmid contaminant DNA do not grow because of the ccdB toxin in BBa_I52002. Screen the clone.

How to perform genome integration

The integration into the E. coli chromosome can exploit the bacteriophage attP-mediated integration or the homologous recombination.

Detailed protocols about attP-mediated integration can be found here:

• Anderson JC et al., 2010 (REFERENCE 1 [1])
• Haldimann A and Wanner BL, 2001 (REFERENCE 8 [2])

Detailed protocols about homologous recombination can be found here:

• Martinez-Morales F et al., 1999 (REFERENCE 11 [3])
• Posfai G et al., 1997 (REFERENCE 12 [4])

Sequence and Features

Assembly Compatibility:

• 10
  INCOMPATIBLE WITH RFC[10]

  Illegal XbaI site found at 169
  Illegal XbaI site found at 1539
  Illegal SpeI site found at 1727
  
• 12
  INCOMPATIBLE WITH RFC[12]

  Plasmid lacks a prefix.
  Plasmid lacks a suffix.
  Illegal EcoRI site found at 2150
  Illegal NheI site found at 1558
  Illegal NheI site found at 1974
  Illegal SpeI site found at 2
  Illegal SpeI site found at 1727
  Illegal PstI site found at 16
  Illegal NotI site found at 9
  Illegal NotI site found at 2156
  
• 21
  INCOMPATIBLE WITH RFC[21]

  Plasmid lacks a prefix.
  Plasmid lacks a suffix.
  Illegal EcoRI site found at 2150
  
• 23
  INCOMPATIBLE WITH RFC[23]

  Illegal prefix found at 2150
  Illegal suffix found at 2
  Illegal XbaI site found at 169
  Illegal XbaI site found at 1539
  Illegal SpeI site found at 1727
  
• 25
  INCOMPATIBLE WITH RFC[25]

  Illegal prefix found at 2150
  Plasmid lacks a suffix.
  Illegal XbaI site found at 169
  Illegal XbaI site found at 1539
  Illegal XbaI site found at 2165
  Illegal SpeI site found at 2
  Illegal SpeI site found at 1727
  Illegal PstI site found at 16
  
• 1000
  INCOMPATIBLE WITH RFC[1000]

  Plasmid lacks a prefix.
  Plasmid lacks a suffix.