How many types of DNA polymerase are present in bacteria?
Dear Dr.
In prokaryotes, three main types of polymerases are known: DNA pol I, DNA pol II, and DNA pol III.
https://openoregon.pressbooks.pub/mhccmajorsbio/chapter/dna-replication-in-prokaryotes/#:~:text=In%20prokaryotes%2C%20three%20main%20types,II%2C%20and%20DNA%20pol%20III.
In bacteria, three main types of DNA polymerases are known: DNA pol I, DNA pol II, and DNA pol III. It is now known that DNA pol III is the enzyme required for DNA synthesis; DNA pol I and DNA pol II are primarily required for repair. DNA pol III adds deoxyribonucleotides each complementary to a nucleotide on the template strand, one by one to the 3′-OH group of the growing DNA chain. The addition of these nucleotides requires energy. This energy is present in the bonds of three phosphate groups attached to each nucleotide (a triphosphate nucleotide), similar to how energy is stored in the phosphate bonds of adenosine triphosphate (ATP) (Figure 3). When the bond between the phosphates is broken and diphosphate is released, the energy released allows for the formation of a covalent phosphodiester bond by dehydration synthesis between the incoming nucleotide and the free 3′-OH group on the growing DNA strand.
Three types
https://www.researchgate.net/deref/https%3A%2F%2Fopenoregon.pressbooks.pub%2Fmhccmajorsbio%2Fchapter%2Fdna-replication-in-prokaryotes%2F%23%3A~%3Atext%3DIn%2520prokaryotes%252C%2520three%2520main%2520types%2CII%252C%2520and%2520DNA%2520pol%2520III
Article DNA & Its Double Helical Model
maybe this article will help you
Hi Dr.
Agree with colleagues' answers
DNA pol I, DNA pol II, and DNA pol III
Actually, there are more than that. In the E. coli genome, there are 5 DNA polymerases listed in EcoCyc:
https://ecocyc.org/ECOLI/substring-search?type=NIL&object=dna+polymerase&quickSearch=Quick+Search
In eukaryotic cells, there are 5 families of DNA polymerase. These can encode into different (up to as many as 15) enzymes. Critical for DNA replication are three DNA polymerases: Polymerase α-primase, Polymerase δ, and Polymerase ε. These three polymerases function at the replication fork of the DNA strands.
https://en.m.wikibooks.org/wiki/Structural_Biochemistry/Nucleic_Acid/DNA/Replication_Process/DNA_Polymerase
https://openoregon.pressbooks.pub/mhccmajorsbio/chapter/dna-replication-in-prokaryotes/#:~:text=In%20prokaryotes%2C%20three%20main%20types,II%2C%20and%20DNA%20pol%20III
Hi Dr.
https://www.researchgate.net/deref/https%3A%2F%2Fopenoregon.pressbooks.pub%2Fmhccmajorsbio%2Fchapter%2Fdna-replication-in-prokaryotes%2F%23%3A~%3Atext%3DIn%2520prokaryotes%252C%2520three%2520main%2520types%2CII%252C%2520and%2520DNA%2520pol%2520III
Good morning Dr.
In bacteria, three main types of DNA polymerases are known: DNA pol I, DNA pol II, and DNA pol III. It is now known that DNA pol III is the enzyme required for DNA synthesis; DNA pol I and DNA pol II are primarily required for repair. DNA pol III adds deoxyribonucleotides each complementary to a nucleotide on the template strand, one by one to the 3′-OH group of the growing DNA chain. The addition of these nucleotides requires energy. This energy is present in the bonds of three phosphate groups attached to each nucleotide (a triphosphate nucleotide), similar to how energy is stored in the phosphate bonds of adenosine triphosphate (ATP) (Figure 3). When the bond between the phosphates is broken and diphosphate is released, the energy released allows for the formation of a covalent phosphodiester bond by dehydration synthesis between the incoming nucleotide and the free 3′-OH group on the growing DNA strand.
https://openoregon.pressbooks.pub/mhccmajorsbio/chapter/dna-replication-in-prokaryotes/
In general the prokaryote have 3 but some type of bacteria have 5 like E.coli
Hazim A. N. Alhadrawi
In prokaryotes, three main types of polymerases are known: DNA pol I, DNA pol II, and DNA pol III.
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