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Author Smertenko, Andrey ♦ Blume, Yaroslav ♦ Viklický, Vladimír ♦ Opatrný, Zdeněk ♦ Dráber, Pavel
Source SpringerLink
Content type Text
Publisher Springer-Verlag
File Format PDF
Copyright Year ©1997
Language English
Subject Domain (in DDC) Natural sciences & mathematics ♦ Life sciences; biology
Subject Keyword High-resolution isoelectric focusing ♦ Immunofluorescence microscopy ♦ Nicotiana microtubules ♦ Posttranslational modifications of tubulin ♦ Tubulin isoforms ♦ Plant Sciences ♦ Agriculture ♦ Ecology ♦ Forestry
Abstract Distribution of post-translationally modified tubulins in cells of Nicotiana tabacum L. was analysed using a panel of specific antibodies. Polyglutamylated, tyrosinated, nontyrosinated, acetylated and Δ2-tubulin variants were detected on α-tubulin subunits; polyglutamylation was also found on β-tubulin subunits. Modified tubulins were detected by immunofluorescence microscopy in interphase microtubules, preprophase bands, mitotic spindles as well as in phragmoplasts. They were, however, located differently in the various microtubule structures. The antibodies against tyrosinated, acetylated and polyglutamylated tubulins gave uniform staining along all microtubules, while antibodies against nontyrosinated and Δ2-tubulin provided dotlike staining of interphase microtubules. Additionally, immunoreactivity of antibodies against acetylated and Δ2-tubulins was strong in the pole regions of mitotic spindles. High-resolution isoelectric focusing revealed 22 tubulin charge variants in N. tabacum suspension cells. Immunoblotting with antibodies TU-01 and TU-06 against conserved antigenic determinants of α- and β-tubulin molecules, respectively, revealed that 11 isoforms belonged to the α-subunit and 11 isoforms to the β-subunit. Whereas antibodies against polyglutamylated, tyrosinated and acetylated tubulins reacted with several α-tubulin isoforms, antibodies against nontyrosinated and Δ2-tubulin reacted with only one. The combined data demonstrate that plant tubulin is extensively posttranslationally modified and that these modifications participate in the generation of plant tubulin polymorphism.
ISSN 00320935
Age Range 18 to 22 years ♦ above 22 year
Educational Use Research
Education Level UG and PG
Learning Resource Type Article
Publisher Date 1997-01-01
Publisher Place Berlin/Heidelberg
e-ISSN 14322048
Journal Planta
Volume Number 201
Issue Number 3
Page Count 10
Starting Page 349
Ending Page 358

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Source: SpringerLink