Plasmid pRK2013 is a self-transmissible plasmid (size: 48 kbp) containing the broad host range transfer system of RK2 [10, 12]. It is efficiently transferred between Gram-negative bacteria and can promote the conjugal transfer of unrelated plasmids [10, 12].
What is E coli HB101?
HB101 strain is a hybrid K12 x B bacterium, containing the recA13 mutation that minimizes recombination and aidsin insert stability. In addition, it carries the hsdS20(rB-mB-) restriction minus genotype which prevents cleavage of cloned DNA by endogenous restriction enzymes.
Are plasmids used in DNA replication?
The plasmid DNA sites are essential components of the origin of replication since they are required to organize a functional replisome (61, 62, 282).
What are HB101 cells?
HB101 cells are recA–, which minimizes recombination events, and contain a restriction-minus background (hsdS20) that allows better representation when cloning methylated DNA. HB101 Competent Cells are suitable for vectors that do not require α-complementation for blue/white screening.
How do you read e coli genotype?
Genes: In E. coli, the genotype only includes the genes that carry a loss of function mutation. The gene name is listed as three-letters in lower case and italics (DNA methylase is written as dam). Different genes affecting the same function/pathway are identified with different uppercase italic letters.
What is replicative plasmid?
Plasmids utilize their host cell’s replication machinery in order to replicate. As described in our previous Origin of Replication post, DNA replication is initiated at the ORI and may be synchronized with the replication of the host cell’s chromosomal DNA or may be independent of the host’s cell cycle.
How do plasmids replicate?
Every plasmid has its own ‘origin of replication’ – a stretch of DNA that ensures it gets replicated (copied) by the host bacterium. For this reason, plasmids can copy themselves independently of the bacterial chromosome, so there can be many copies of a plasmid – even hundreds – within one bacterial cell.
What is the genotype of E. coli?
In E. coli, the genotype only includes the genes that carry a loss of function mutation. The gene name is listed as three-letters in lower case and italics (DNA methylase is written as dam). Different genes affecting the same function/pathway are identified with different uppercase italic letters.
What is RecA1?
recA1: RecA is a protein used by E. coli to repair and maintain DNA. RecA1 is an inactivated form of RecA. RecA1 is deficient in all known function of the RecA gene specifically in ATPase activity, binding with DNA in the presence of ATP, and changing conformation in the presence of ATP and repressor cleavage.
What is meant by Replicon?
A replicon is a DNA molecule or RNA molecule, or a region of DNA or RNA, that replicates from a single origin of replication.
What is the difference between replicative and non replicative transposon?
What is replicative transposition? When a transposon replicates, makes a new copy and leaves the old copy behind, is considered as the replicative transposons while, when transposons move from one to another place by leaving a gap behind is considered as the non-replicative transposons.
