GSBS Student Publications

Title

Interaction of brain cytoplasmic dynein and MAP2 with a common sequence at the C terminus of tubulin

UMMS Affiliation

Graduate School of Biomedical Sciences; Department of Cell Biology

Date

11-30-1989

Document Type

Article

Medical Subject Headings

Adenosine Triphosphatases; Amino Acid Sequence; Binding Sites; Brain; Dynein ATPase; Microtubule-Associated Proteins; Molecular Sequence Data; Subtilisins; Thermolysin; Tubulin

Disciplines

Life Sciences | Medicine and Health Sciences

Abstract

Two main types of microtubule-associated proteins (MAPs) have been identified in neuronal cells. The fibrous MAPs, including MAP2 and tau, serve to organize and regulate the assembly of microtubules. A second distinct class of force-producing MAPs, including kinesin, dynein and dynamin, are involved in microtubule-based movement. These proteins are mechanochemical ATPases which seem to be responsible for the bidirectional transport of organelles and perhaps also the movement of chromosomes. Here we report that MAP2 inhibits microtubule gliding on dynein-coated coverslips, as well as the microtubule-activated ATPase of dynein, indicating that MAP2 and other fibrous MAPs could be important modulators of microtubule-based motility in vivo. By proteolytic modification of tubulin, we found that dynein interacts with microtubules at the C termini of alpha- and beta-tubulin, the regions previously reported to be the sites for the interaction of MAP2. The use of site-directed antibodies implicates a small region of alpha- and beta-tubulin, containing the sequence Glu-Gly-Glu-Glu, as the site of the interaction of dynein and MAP2 with the microtubule.

Rights and Permissions

Citation: Nature. 1989 Nov 30;342(6249):569-72. Link to article on publisher's site

DOI of Published Version

10.1038/342569a0

Related Resources

Link to article in PubMed

Journal Title

Nature

PubMed ID

2531294