Introduction
Components of binary vector
Development of binary vector system
Properties of binary vector
Types of binary vector
Plant transformation using binary vector
Advantage of using binary vector
Conclusion
References
Analytical Profile of Coleus Forskohlii | Forskolin .pptx
Binary Vector, By KK Sahu sir
1. By
KAUSHAL KUMAR SAHU
Assistant Professor (Ad Hoc)
Department of Biotechnology
Govt. Digvijay Autonomous P. G. College
Raj-Nandgaon ( C. G. )
2. SYNOPSIS
Introduction
Components of binary vector
Development of binary vector system
Properties of binary vector
Types of binary vector
Plant transformation using binary vector
Advantage of using binary vector
Conclusion
References
3. INTRODUCTION
In these systems, the T-DNA region containing a gene of
interest is contained in one vector and the vir region is
located in a separate disarmed (without tumor-genes) Ti
plasmid. The plasmids co-reside in Agrobacterium and
remain independent.
In the binary vector system, the two different plasmids
employed are:
a wide-host-range small replicon, which has an origin of
replication (ori) that permits the maintenance of the plasmid
in a wide range of bacteria including E. coli and
Agrobacterium.
a helper Ti plasmid, harbored in A. tumefaciens, which
lacks the entire T-DNA region but contains an intact vir
region.
4.
5. COMPONENT OF BINARY VECTOR
The standard component of binary vector are:
Multiple cloning site
A broad host range origin of replication functional in both
E.coli and A. tumefaciens.
Selectable markers for both bacteria and plants
T-DNA border sequences.
6. DEVELOPMENT OF BINARY VECTOR
Hoekema et al. (1983) and de Framond et al.
(1983) determined that the vir and T-DNA regions of Ti-
plasmids could be split onto two separate replicons.
7. •Genes of interest are maintained within the T-DNA
region of a binary vector. Vir proteins encoded by genes
on a separate replicon (vir helper) mediate T-DNA
processing from the binary vector and T-DNAtransfer
from the bacterium to the host cell.
• The selection marker is used to indicate successful
plant transformation. ori, Origin of replication; Abr,
antibiotic-resistance gene used to select for the
presence of the T-DNAbinary vector in E.Coli
or in Agrobacterium.
8. PROPERTIES OF BINARY VECTOR
These include the following:
T-DNA left and right border repeat sequences to define and
delimit T-DNA.
A plant-active selectable marker gene .
Restriction endonuclease, rare-cutting, or homing
endonuclease sites within T-DNA into which goi can be
inserted.
Origin(s) of replication to allow maintenance in E. coli and
Agrobacterium.
Antibiotic-resistance genes within the chromosome and
within backbone sequences for selection of the binary vector
in E. coli and Agrobacterium.
9. TYPES
pGA series vectors
pCG series vectors
pCIT series
Pgptv
pBECK2000 series
pGreen series
10. PLANT TRANSFORMATION USING
BINARY VECTOR
Propagate binary vector in E. coli
Isolate binary vector from E.coli and engineer (introduce a
foreign gene)
Isolate engineered binary vector and introduce into
Agrobacterium containing a modified Ti plasmid
Infect plant tissue with engineered Agrobacterium (T-DNA
containing the foreign gene gets inserted into a plant cell
genome)
11. Advantages of using Binary vector
Binary vector do not need in vivo recombination.
Binary vectors require only that an intact plasmid vector
to be introduced into the target bacterium, making the
process of bacterial transformation both more efficient
and quicker.
Binary vector systems with plant ready genes in
Agrobacteria are easily and efficiently obtained.
In binary system, the binary plasmids exist as separate
replicons, thus copy number is not strictly tied to that of
Ti plasmid.
12. CONCLUSION
T-DNA binary systems have greatly simplified the generation
of transgenic plants. Along with companion vir helper
strains, numerous different T-DNA binary vectors with
specialized properties have been designed to facilitate such
diverse activities as protein expression, activation tagging,
protein localization, protein-protein interaction studies, and
RNAi-mediated gene silencing.
13. REFERENCES
MK Razdan and SS Bhojwani- Plant tissue culture
H.S. Chawla- Introduction to plant biotechnology
IK Vasil- plant cell and Tissue culture