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Definition of «Dynein»

Dynein: A family of microtubule motor proteins that derive energy from ATP (adenosine triphosphatase) activity. The dyneins also form arms on the outer tubules of cilia and flagella.

The dynein motor, a cellular complex believed to be composed of 12 distinct protein parts, performs fundamental transportation tasks critical to the cell. Defects in its structure can prove fatal for the cell. This machine converts chemical energy stored in an ATP molecule into mechanical energy that moves material though the cell along slender filaments called microtubules. One of the dynein motor's most important functions occurs during cell division, when it helps move chromosomes into proper position.

The dyneins are not related in sequence to the other known class of microtubule motor proteins, the kinesin.

For More Information «Dynein»

  • Dynein: Definition from Answers.com

    A large enzyme complex that hydrolyzes adenosine triphosphate to provide energy to power retrograde [from (+) to (-)] transport along microtubules.

  • The Dynein Homepage

    Welcome to the Dynein homepage, hosted in the Faculty of Biological Sciences at the University of Leeds. Recent Publications X-ray structure of a functional full-length ...

  • dynein - definition of dynein in the Medical dictionary - by ...

    dynein /dy·ne·in/ (di´nēn) an ATP-splitting enzyme essential to the motility of cilia and flagella because of its interactions with microtubules.

  • Dynein | Define Dynein at Dictionary.com

    dy·nein definition Pronunciation: /ˈdī-ˌnēn, -ˌnē-ən/ Function: n : an ATPase that cross-links adjacent microtubules and that by controlling their relative ...

  • Cytoplasmic Dynein - people.Virginia.EDU

    Cytoplasmic Dynein. Cytoplasmic dynein is a rather large multi-subunit protein complex composed of two identical heavy chains of about 530 kDa each (dark blue), two 74 kDa ...