gyrase

noun gyr·ase \ ˈjī-ˌrās \

Definition of gyrase

:a bacterial enzyme that catalyzes the breaking and rejoining of bonds linking adjacent nucleotides in circular DNA to generate supercoiled DNA helices

Origin and Etymology of gyrase

gyr- + -ase


Medical Dictionary

gyrase

noun gy·rase \ ˈjī-ˌrās, -ˌrāz \

medical Definition of gyrase

:a bacterial enzyme that is a topoisomerase which catalyzes the ATP-dependent breaking and rejoining of double-strands in circular DNA to generate negative supercoils that twist in the opposite direction as the turns in the original helices
Note: The supercoils introduced by the bacterial gyrase help to relieve the torsional stress in the circular DNA strands that is a consequence of the unwinding of the DNA during replication.

Learn More about gyrase


Seen and Heard

What made you want to look up gyrase? Please tell us where you read or heard it (including the quote, if possible).

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!

WORD OF THE DAY

to conform or adhere

Get Word of the Day daily email!

Test Your Vocabulary

The Exceptions Quiz III

  • one-green-toy-robot-amidst-many-red-toy-robots
  • Which of these words does not mean "nonsense"?
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

TAKE THE QUIZ
Word Winder's CrossWinder

Test Your Knowledge - and learn some interesting things along the way.

TAKE THE QUIZ

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!