Deinococcus radiodurans

Updated: 2026-09-15

Overview

Deinococcus radiodurans is a Gram-positive bacterium renowned for its exceptional resistance to ionizing radiation, ultraviolet light, desiccation, and oxidative stress. First isolated in 1956 from irradiated canned meat, it has since become a model organism for studying DNA repair mechanisms. This bacterium can survive radiation doses up to 5,000 Gy (500,000 rad) without loss of viability, making it approximately 1,000 times more resistant than most other organisms. Its unique characteristics have made it valuable for various scientific and industrial applications.

Key Features

The most remarkable feature of Deinococcus radiodurans is its extraordinary DNA repair capability. When its genome is shattered by radiation, the bacterium can accurately reassemble it within hours through multiple repair pathways. Other notable characteristics include its ability to form tetrads (groups of four cells), its bright red pigmentation due to carotenoids, and its capacity to survive in nutrient-poor environments. These traits collectively make it one of the most radiation-resistant organisms known to science.

Application Areas

In bioremediation, Deinococcus radiodurans is engineered to clean up radioactive waste sites by breaking down toxic organic compounds in radioactive environments. Its radiation resistance makes it ideal for these harsh conditions. Biotechnology applications include its use in studying oxidative stress resistance and DNA repair mechanisms. The organism also has potential in astrobiology research, helping scientists understand how life might survive in extreme space environments.

Precautions

While Deinococcus radiodurans is not pathogenic, standard laboratory biosafety level 1 precautions should be followed when handling it. This includes wearing appropriate personal protective equipment and working in controlled environments. Special consideration should be given to genetically modified strains, which may require additional containment measures depending on the nature of the modifications and local regulations.

B2B Procurement Guide

When procuring Deinococcus radiodurans strains for research or industrial applications, verify the strain's authenticity through reputable culture collections. Consider the specific strain characteristics needed for your application, as different strains may have varying capabilities. Lead times for specialized strains can vary, so plan procurement accordingly. For large-scale applications, discuss cultivation requirements with suppliers to ensure compatibility with your facilities.