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| Content Provider | World Health Organization (WHO)-Global Index Medicus |
|---|---|
| Author | Folker, Eric S. Gupta, Kamlesh K. Paulson, Benjamin A. Hunt, Alan J. Goodson, Holly V. Charlebois, Blake |
| Description | Author Affiliation: Gupta KK ( Department of Chemistry and Biochemistry, University of Notre Dame, Notre Dame, Indiana 46556, USA.) |
| Abstract | Cytoplasmic linker protein 170 (CLIP-170) is the prototype microtubule (MT) plus-end tracking protein (+TIP) and is involved in regulating MT dynamics. A comprehensive understanding of the process by which CLIP-170 tracks MT plus ends would provide insight into its function. However, the precise molecular mechanism of CLIP-170 +TIP behavior is unknown, and many potential models have been presented. Here, by separating the two CLIP-170 CAP-Gly domains and their adjacent serine-rich regions into fragments of varied size, we have characterized the minimal plus-end tracking unit of CLIP-170 in vivo. Each CLIP-170 fragment was also characterized for its tubulin polymerization activity in vitro. We found that the two CAP-Gly domains have different activities, whereas CAP-Gly-1 appears incompetent to mediate either +TIP behavior or MT nucleation, a CLIP-170 fragment consisting of the second CAP-Gly domain and its adjacent serine-rich region can both track MT plus ends in vivo and induce tubulin polymerization in vitro. These observations complement recent work on CLIP-170 fragments, demonstrate that CAP-Gly motifs do not require dimerization for +TIP and polymerization-promoting activities, and provide insight into CLIP-170 function and mechanism. |
| ISSN | 00219258 |
| e-ISSN | 1083351X |
| Journal | Journal of Biological Chemistry |
| Issue Number | 11 |
| Volume Number | 284 |
| Language | English |
| Publisher | American Society for Biochemistry and Molecular Biology (United States) |
| Publisher Date | 2009-03-13 |
| Publisher Place | United States |
| Access Restriction | Open |
| Subject Keyword | Microtubule-Associated Proteins Metabolism Microtubules Models, Biological Neoplasm Proteins Tubulin Amino Acid Motifs Physiology Animals COS Cells Cercopithecus Aethiops Genetics Protein Structure, Tertiary Swine Research Support, N.I.H., Extramural Biochemistry Molecular Biology |
| Content Type | Text |
| Resource Type | Article |
| Subject | Cell Biology Biochemistry Molecular Biology |
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