Two approaches to isolate cytoplasmic dynein ATPase from Neurospora crassa

Santosh Kumar, In Hyung Lee, Michael Plamann

Research output: Contribution to journalArticle

8 Citations (Scopus)

Abstract

Cytoplasmic dynein is a force-producing enzyme that, in association with dynactin, conducts minus-end directed transport of various organelles along microtubules. Biochemical analyses of cytoplasmic dynein and dynactin have been conducted primarily in vertebrate systems, whereas genetic analyses have been explored mainly in yeast and the filamentous fungi. To provide a complementary biochemical approach for the study of fungal dynein, we isolated/partially purified cytoplasmic dynein ATPase from the filamentous fungus Neurospora crassa. N. crassa dynein was partially purified by slightly modifying the existing procedures, described for mammalian cytoplasmic dynein that uses dynein-microtubule binding, followed by release with ATP and sucrose gradient fractionation. A novel approach was also used to isolate dynein-specific ATPase by gel filtration (Sepharose CL-4B). The K(m), ATP obtained by isolating dynein ATPase using gel filtration was similar to that obtained by using conventional method, suggests that contaminant proteins do not interfere with the dynein ATPase activity. Like vertebrate dynein, N. crassa dynein is a general NTPase with highest activity toward ATP, and only the ATPase activity is stimulated by microtubules. The K(m), ATP for N. crassa cytoplasmic dynein is 10- to 15-fold higher than that of the vertebrate enzyme. (C) 2000 Societe francaise de biochimie et biologie moleculaire / Editions scientifique et medicales Elsevier SAS.

Original languageEnglish (US)
Pages (from-to)229-236
Number of pages8
JournalBiochimie
Volume82
Issue number3
DOIs
StatePublished - Jan 1 2000
Externally publishedYes

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Cytoplasmic Dyneins
Dyneins
Neurospora crassa
Adenosine Triphosphate
Microtubules
Vertebrates
Fungi
Gel Chromatography
Adenosine Triphosphatases
Nucleoside-Triphosphatase
Gels
Enzymes
Fractionation
Organelles
Yeast
Sucrose
Yeasts
Impurities

All Science Journal Classification (ASJC) codes

  • Biochemistry

Cite this

Two approaches to isolate cytoplasmic dynein ATPase from Neurospora crassa. / Kumar, Santosh; Lee, In Hyung; Plamann, Michael.

In: Biochimie, Vol. 82, No. 3, 01.01.2000, p. 229-236.

Research output: Contribution to journalArticle

Kumar, Santosh ; Lee, In Hyung ; Plamann, Michael. / Two approaches to isolate cytoplasmic dynein ATPase from Neurospora crassa. In: Biochimie. 2000 ; Vol. 82, No. 3. pp. 229-236.
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