TY - JOUR
T1 - CLASPs are CLIP-115 and -170 associating proteins involved in the regional regulation of microtubule dynamics in motile fibroblasts
AU - Akhmanova, Anna
AU - Hoogenraad, Casper C.
AU - Drabek, Ksenija
AU - Stepanova, Tatiana
AU - Dortland, Bjorn
AU - Verkerk, Ton
AU - Vermeulen, Wim
AU - Burgering, Boudewijn M.
AU - De Zeeuw, Chris I.
AU - Grosveld, Frank
AU - Galjart, Niels
PY - 2001/3/23
Y1 - 2001/3/23
N2 - CLIP-170 and CLIP-115 are cytoplasmic linker proteins that associate specifically with the ends of growing microtubules and may act as anti-catastrophe factors. Here, we have isolated two CLIP-associated proteins (CLASPs), which are homologous to the Drosophila Orbit/Mast microtubule-associated protein. CLASPs bind CLIPs and microtubules, colocalize with the CLIPs at microtubule distal ends, and have microtubule-stabilizing effects in transfected cells. After serum induction, CLASPs relocalize to distal segments of microtubules at the leading edge of motile fibroblasts. We provide evidence that this asymmetric CLASP distribution is mediated by PI3-kinase and GSK-3β. Antibody injections suggest that CLASP2 is required for the orientation of stabilized microtubules toward the leading edge. We propose that CLASPs are involved in the local regulation of microtubule dynamics in response to positional cues.
AB - CLIP-170 and CLIP-115 are cytoplasmic linker proteins that associate specifically with the ends of growing microtubules and may act as anti-catastrophe factors. Here, we have isolated two CLIP-associated proteins (CLASPs), which are homologous to the Drosophila Orbit/Mast microtubule-associated protein. CLASPs bind CLIPs and microtubules, colocalize with the CLIPs at microtubule distal ends, and have microtubule-stabilizing effects in transfected cells. After serum induction, CLASPs relocalize to distal segments of microtubules at the leading edge of motile fibroblasts. We provide evidence that this asymmetric CLASP distribution is mediated by PI3-kinase and GSK-3β. Antibody injections suggest that CLASP2 is required for the orientation of stabilized microtubules toward the leading edge. We propose that CLASPs are involved in the local regulation of microtubule dynamics in response to positional cues.
UR - http://www.scopus.com/inward/record.url?scp=17744372880&partnerID=8YFLogxK
U2 - 10.1016/S0092-8674(01)00288-4
DO - 10.1016/S0092-8674(01)00288-4
M3 - Article
C2 - 11290329
AN - SCOPUS:17744372880
SN - 0092-8674
VL - 104
SP - 923
EP - 935
JO - Cell
JF - Cell
IS - 6
ER -