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Dihydroxyacetone synthase is localized in the peroxisomal matrix of methanol-grown Hansenula polymorpha

Abstract

The subcellular localization of dihydroxyacetone synthase (DHAS) in the methylotrophic yeast Hansenula polymorpha was studied by various biochemical and immunocytochemical methods. After cell fractionation involving differential and sucrose gradient centrifugation of protoplast homogenates prepared from methanol-grown cells, DHAS cosedimented with the peroxisomal enzymes alcohol oxidase and catalase. Electron microscopy of this fraction showed that it contained mainly intact peroxisomes, whereas SDS-polyacrylamide gel electrophoresis revealed two major protein bands (75 and 78 kDa) which were identified as alcohol oxidase and DHAS, respectively. The localization of DHAS in peroxisomes was further established by immunocytochemistry. After immuno-gold staining carried out on ultrathin sections of methanol-grown H. polymorpha using DHAS-specific antibodies, labelling was confined to the peroxisomal matrix.

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Similar content being viewed by others Explore related subjectsDiscover the latest articles and news from researchers in related subjects, suggested using machine learning. Abbreviations
MES:

2-(N-morpholino)ethanesulfonic acid

DTT:

dithiothreitol

SDS:

sodium dodecyl sulphate

TPP:

thiamin pyrophosphate

DHAS:

dihydroxyacetone synthase

GSH:

reduced glutathione

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Author information Authors and Affiliations
  1. Department of Micrbiology, University of Groningen, Biological Centre, Kerklaan 30, NL-9751 NN, Haren, The Netherlands

    Anneke C. Douma, Wim de Koning & Wim Harder

  2. Laboratory of Electron Microscopy, University of Groningen, Biological Centre, Kerklaan 30, NL-9751 NN, Haren, The Netherlands

    Marten Veenhuis & Melchior Evers

Authors
  1. Anneke C. Douma
  2. Marten Veenhuis
  3. Wim de Koning
  4. Melchior Evers
  5. Wim Harder
About this article Cite this article

Douma, A.C., Veenhuis, M., de Koning, W. et al. Dihydroxyacetone synthase is localized in the peroxisomal matrix of methanol-grown Hansenula polymorpha . Arch. Microbiol. 143, 237–243 (1985). https://doi.org/10.1007/BF00411242

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