Bacterial Conjugation. Bacterial conjugation is one of the principal means of dissemination of genetic information among microbes and from bacteria to other domains of life including plants and other eukaryotes. From: Encyclopedia of Microbiology (Third Edition), 2009. Related terms: Plasmid; Nested Gene; Bacterium; Conjugation; Mutation; Bacteriophage Bacterial Conjugation Definition. Conjugation is the transfer of a plasmid or other self-transmissible DNA element and sometimes chromosomal DNA from a donor cell to a recipient cell via direct contact usually mediated by a conjugation pilus or sex pilus. Recipients of the DNA transferred by conjugation are called transconjugants. Lesson Summary. Let's recap: Conjugation is a mechanism for the horizontal transfer of genes between bacterial cells. This is the only mechanism of horizontal gene transfer that requires physical... Bacterial Conjugation Definition. Conjugation is the transfer of a plasmid or other self-transmissible DNA element and sometimes chromosomal DNA from a donor cell to a recipient cell via direct contact usually mediated by a conjugation pilus or sex pilus. Recipients of the DNA transferred by conjugation are called transconjugants. The conjugation method was first studied in Escherichia coli. The formation of a conjugation tube is the characteristic feature in a conjugation mechanism. Instead of transduction and transformation, some bacteria passes the genetic information from a donor to a recipient cell via the cytoplasmic bridge, what we call as “Conjugation tube”. Definition: What is Bacterial Conjugation? Essentially, conjugation refers to the process through which bacteria exchange genetic material. This process is often regarded as the bacterial equivalent of sexual reproduction/mating given that it involves an exchange of genetic material between two cells (recipient and donor). o Survival of the species Diploid Eukaryotes o Crossing over o Meiosis Haploid Prokaryotes o Transduction o Transformation o Conjugation 3. Genetic material exchanged via Viruses o E.g. bacteriophage lambda No physical contact b/w bacteria Promotes drug resistance Horizontal gene transfer 4. Conjugation in bacteria is a process in which plasmids are transferred by themselves alone or along with other DNA element from one cell to another cell through conjugation tube. Conjugation occur by physical contact between cells. Bacterial Conjugation Definition Bacterial conjugation is a way by which a bacterial cell transfers genetic material to another bacterial cell. The genetic material that is transferred through bacterial conjugation is a small plasmid , known as F-plasmid (F for fertility factor), that carries genetic information different from that which is already present in the chromosomes of the bacterial cell. Bacterial conjugation is the transfer of genetic material between bacterial cells by direct cell-to-cell contact or by a bridge-like connection between two cells. [1] Discovered in 1946 by Joshua Lederberg and Edward Tatum , [ 2 ] conjugation is a mechanism of horizontal gene transfer as are transformation and transduction although these two other mechanisms do not involve cell-to-cell contact.
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