Related Experiment Videos
A third DNA polymerase from Spiroplasma citri and two other spiroplasmas
Journal of Bacteriology
|March 1, 1982
Summary
Researchers discovered a third DNA polymerase (ScC) in Spiroplasma citri and related species. This enzyme is sensitive to N-ethylmaleimide (NEM), unlike other identified Spiroplasma DNA polymerases.
Area of Science:
- Microbiology
- Molecular Biology
- Genetics
Background:
- Two DNA polymerases, ScA and ScB, were previously identified in Spiroplasma citri.
- Spiroplasma species are known for their unique genetic makeup and potential impact on host organisms.
Purpose of the Study:
- To identify and characterize novel DNA polymerases in Spiroplasma species.
- To investigate the presence and properties of a third DNA polymerase (ScC) across different Spiroplasma strains.
Main Methods:
- Isolation and characterization of DNA polymerases from Spiroplasma citri, honeybee spiroplasma BC3, and flower spiroplasma BNR1.
- Enzyme assays to determine N-ethylmaleimide (NEM) sensitivity and ion-exchange chromatography (DEAE-cellulose) for purification and characterization.
Main Results:
- A third DNA polymerase, designated ScC, was identified in Spiroplasma citri, honeybee spiroplasma BC3, and flower spiroplasma BNR1.
- Enzyme ScC was found to be sensitive to N-ethylmaleimide (NEM).
- NEM-resistant enzyme ScA from S. citri and BC3 were retained on DEAE-cellulose, while ScA from BNR1 was not.
Conclusions:
- The study reveals the existence of a conserved, NEM-sensitive DNA polymerase (ScC) across different Spiroplasma species.
- Variations in NEM-resistant DNA polymerase A (ScA) behavior during chromatography suggest strain-specific differences within Spiroplasma.