Abstract
Previously we isolated tub2-423, a cold-sensitive allele of the Saccharomyces cerevisiae gene encoding β-tubulin that confers a defect in mitotic spindle function. In an attempt to identify additional proteins that are important for spindle function, we screened for suppressors of the cold sensitivity of tub2-423 and obtained two alleles of a novel gene, STU2. STU2 is an essential gene and encodes a protein whose sequence is similar to proteins identified in a variety of organisms. Stu2p localizes primarily to the spindle pole body (SPB) and to a lesser extent along spindle microtubules. Localization to the SPB is not dependent on the presence of microtubules, indicating that Stu2p is an integral component of the SPB. Stu2p also binds microtubules in vitro. We have localized the microtubule-binding domain of Stu2p to a highly basic 100-amino acid region. This region contains two imperfect repeats; both repeats appear to contribute to microtubule binding to similar extents. These results suggest that Stu2p may play a role in the attachment, organization, and/or dynamics of microtubule ends at the SPB.
References
54
Referenced
145
10.1091/mbc.3.1.29
/ Mol Biol Cell / Yeast proteins associated with microtubules in vitro and in vivo by Barnes (1992)10.1016/0896-6273(93)90279-Z
/ Neuron / Phosphorylation of Ser262 strongly reduces binding of tau to microtubules: distinction between PHF-like immunoreactivity and microtubule binding by Biernat (1993)10.1083/jcb.98.3.847
/ J Cell Biol / 10-nm filaments are induced to collapse in living cells microinjected with monoclonal and polyclonal antibodies against tubulin by Blose (1984)10.1016/0896-6273(93)90057-X
/ Neuron / Abnormal tau phosphorylation at Ser396 in Alzheimer's disease recapitulates development and contributes to reduced microtubule binding by Bramblett (1993){'key': '2023072207154704200_B5'}
10.1242/jcs.98.1.27
/ J Cell Sci / Non-neuronal 210 × 103Mr microtubule-associated protein (MAP4) contains a domain homologous to the microtubule-binding domains of neuronal MAP2 and tau by Chapin (1991)10.1111/j.1432-1033.1995.406_b.x
/ Eur J Biochem / Characterization of the cDNA and pattern of expression of a new gene over-expressed in human hepatomas and colonic tumors by Charrasse (1995)10.1083/jcb.124.1.19
/ J Cell Biol / Centrosome assembly in vitro: role of γ-tubulin recruitment in Xenopussperm aster formation by Felix (1994)10.1083/jcb.105.5.2203
/ J Cell Biol / A microtubule-associated protein from Xenopuseggs that specifically promotes assembly at the plus end by Gard (1987)10.1016/S0070-2153(08)60234-3
/ Curr Top Dev Biol / Confocal immunofluorescence microscopy of microtubules, microtubule-associated proteins, and microtubule-organizing centers during amphibian oogenesis and early development by Gard (1995)10.1083/jcb.124.5.769
/ J Cell Biol / Identification of a novel microtubule binding and assembly domain in the developmentally regulated inter-repeat region of tau by Goode (1994)10.1038/373663b0
/ Nature / Improved green fluorescence by Heim (1995){'key': '2023072207154704200_B13'}
10.1242/jcs.99.4.693
/ J Cell Sci / The fission yeast γ-tubulin is essential for mitosis and is localized at microtubule organizing centers by Horio (1991)10.1146/annurev.ge.21.120187.001355
/ Annu Rev Genet / Genetic analysis of the yeast cytoskeleton by Huffaker (1987)10.1038/356080a0
/ Nature / γ-tubulin is a centrosomal protein required for cell cycle-dependent microtubule nucleation by Joshi (1992)10.1083/jcb.93.3.576
/ J Cell Biol / Rat monoclonal antitubulin antibodies derived by using a new nonsecreting rat cell line by Kilmartin (1982)10.1016/0092-8674(86)90762-2
/ Cell / Point mutations define a sequence flanking the AUG initiator codon that modulates translation by eukaryotic ribosomes by Kozak (1986)10.1038/227680a0
/ Nature / Cleavage of structural proteins during the assembly of the head bacteriophage T4 by Laemmli (1970)10.1126/science.3122323
/ Science / The primary structure and heterogeneity of tau protein from mouse brain by Lee (1988)10.1126/science.3142041
/ Science / Microtubule-associated protein MAP2 shares a microtubule binding motif with tau protein by Lewis (1988)10.1083/jcb.131.1.207
/ J Cell Biol / γ-Tubulin is a minus end–specific microtubule binding protein by Li (1995)10.1126/science.252.5009.1162
/ Science / Predicting coiled coils from protein sequences by Lupas (1991)10.1083/jcb.134.2.443
/ J Cell Biol / Analysis of Tub4p, a yeast γ-tubulin–like protein: implications for microtubule-organizing center function by Marschall (1996){'key': '2023072207154704200_B25'}
10.1016/0092-8674(90)90351-E
/ Cell / KAR3, a kinesin-related gene required for yeast nuclear fusion by Meluh (1990)10.1083/jcb.109.2.637
/ J Cell Biol / Polewards microtubule flux in the mitotic spindle: evidence from photoactivation of fluorescence by Mitchison (1989)10.1038/312232a0
/ Nature / Microtubule assembly nucleated by isolated centrosomes by Mitchison (1984)10.1038/378638a0
/ Nature / Microtubule nucleation by γ-tubulin–containing rings in the centrosome by Moritz (1995)10.1101/gad.9.13.1572
/ Genes Dev / p93dis1, which is required for sister chromatid separation, is a novel microtubule and spindle pole body-associating protein phosphorylated at the Cdc2 target sites by Nabeshima (1995)10.1046/j.1365-2443.1996.00253.x
/ Genes Cells / Dissection of fission yeast microtubule associating protein p93Dis1: regions implicated in regulated localization and microtubule interaction by Nakaseko (1996)10.1083/jcb.109.6.3367
/ J Cell Biol / The microtubule binding domain of microtubule-associated protein MAP1B contains a repeated sequence motif unrelated to that of MAP2 and tau by Noble (1989)10.1016/0092-8674(90)90693-9
/ Cell / γ-tubulin is a component of the spindle pole body that is essential for microtubule function in Aspergillus nidulans. by Oakley (1990)10.1083/jcb.124.4.507
/ J Cell Biol / Localization of Kar3 kinesin heavy chain–related protein requires the Cik1 interating protein by Page (1994)10.1083/jcb.127.6.1973
/ J Cell Biol / STU1, a suppressor of a β-tubulin mutation, encodes a novel and essential component of the yeast mitotic spindle by Pasqualone (1994)10.1091/mbc.5.1.29
/ Mol Biol Cell / Systematic mutational analysis of the yeast β-tubulin gene by Reijo (1994)10.1093/genetics/134.1.81
/ Genetics / Physical maps of the six smallest chromosomes of Saccharomyces cerevisiaeat a resolution of 2.6 kilobase pairs by Riles (1993)10.1016/0076-6879(91)94017-7
/ Methods Enzymol / Cloning genes by complementation in yeast by Rose (1991)10.1016/0378-1119(87)90232-0
/ Gene / A Saccharomyces cerevisiaegenomic plasmid bank based on a centromere-containing shuttle vector by Rose (1987)10.1016/0076-6879(91)94022-5
/ Methods Enzymol / Targeting, disruption, replacement, and allele rescue: integrative DNA transformation in yeast by Rothstein (1991)10.1083/jcb.137.2.417
/ J Cell Biol / The Saccharomyces cerevisiaekinesin-related motor Kar3p acts at preanaphase spindle poles to limit the number and length of cytoplasmic microtubules by Saunders (1997)10.1083/jcb.112.5.941
/ J Cell Biol / Poleward microtubule flux in mitotic spindles assembled in vitro by Sawin (1991)10.1016/0076-6879(91)94004-V
/ Methods Enzymol / Getting started with yeast by Sherman (1991)10.1093/genetics/122.1.19
/ Genetics / A system of shuttle vectors and yeast host strains designed for efficient manipulation of DNA in Saccharomyces cerevisiae. by Sikorski (1989)10.1083/jcb.131.6.1775
/ J Cell Biol / A highly divergent γ-tubulin gene is essential for cell growth and proper microtubule organization in Saccharomyces cerevisiae. by Sobel (1995)10.1083/jcb.134.2.429
/ J Cell Biol / γ-tubulin-like Tub4p of Saccharomyces cerevisiaeis associated with the spindle pole body substructures that organize microtubules and is required for mitotic spindle formation by Spang (1996)10.1016/0092-8674(94)90503-7
/ Cell / In vitro reconstitution of centrosome assembly and function: the central role of γ-tubulin by Stearns (1994)10.1016/0092-8674(91)90390-K
/ Cell / γ tubulin is a highly conserved component of the centrosome by Stearns (1991)10.1016/0076-6879(86)34079-5
/ Methods Enzymol / Purification of brain microtubules and microtubule-associated protein 1 using taxol by Vallee (1986)10.1083/jcb.127.4.985
/ J Cell Biol / XMAP from Xenopuseggs promotes rapid plus end assembly of microtubules and rapid microtubule polymer turnover by Vasquez (1994)10.1016/0092-8674(89)90692-2
/ Cell / A three-domain structure of kinesin heavy chain revealed by DNA sequence and microtubule binding analyses by Yang (1989)10.1083/jcb.130.3.687
/ J Cell Biol / Spindle dynamics and cell cycle regulation of dynein in the budding yeast, Saccharomyces cerevisiae. by Yeh (1995)10.1016/0092-8674(91)90389-G
/ Cell / γ-Tubulin is present in Drosophila melanogaster and Homo sapiensand is associated with the centrosome by Zheng (1991)10.1038/378578a0
/ Nature / Nucleation of microtubule assembly by a γ-tubulin-containing ring complex by Zheng (1995)
Dates
Type | When |
---|---|
Created | 23 years ago (July 26, 2002, 12:46 p.m.) |
Deposited | 2 years ago (July 22, 2023, 3:16 a.m.) |
Indexed | 2 weeks, 1 day ago (Aug. 5, 2025, 8:34 a.m.) |
Issued | 27 years, 8 months ago (Dec. 1, 1997) |
Published | 27 years, 8 months ago (Dec. 1, 1997) |
Published Online | 27 years, 8 months ago (Dec. 1, 1997) |
Published Print | 27 years, 8 months ago (Dec. 1, 1997) |
@article{Wang_1997, title={Stu2p: A Microtubule-Binding Protein that Is an Essential Component of the Yeast Spindle Pole Body}, volume={139}, ISSN={1540-8140}, url={http://dx.doi.org/10.1083/jcb.139.5.1271}, DOI={10.1083/jcb.139.5.1271}, number={5}, journal={The Journal of Cell Biology}, publisher={Rockefeller University Press}, author={Wang, Peijing Jeremy and Huffaker, Tim C.}, year={1997}, month=dec, pages={1271–1280} }