PMID: 6403285Jan 1, 1983

Hydrogenosomes in a mixed isolate of Isotricha prostoma and Isotricha intestinalis from ovine rumen contents

Comparative Biochemistry and Physiology. B, Comparative Biochemistry
N YarlettA G Williams


1. Both Isotricha intestinalis and I. prostoma possess microbody-like organelles, with a highly granular appearance. 2. These organelles, which are sedimentable at 10(5) g-min, bear no morphological similarity to mitochondria, but are enzymatically similar to organelles possessed by certain other anaerobic protozoa and termed hydrogenosomes. 3. The hydrogenosomes isolated from a preparation of mixed isotrichs bear a closer similarity to those isolated from the other rumen holotrich. Dasytricha ruminantium, than those recently identified in a mixed entodiniomorph preparation, or the trichomonads, in that the enzyme malate dehydrogenase (decarboxylating) is non-sedimentable and phosphoacetyl transferase together with acetate kinase are involved in the transformation of acetyl CoA to acetate. 4. The results enable a scheme of acetate, CO2 and H2 formation from carbohydrates to be proposed and extends the number of protozoa known to possess this organelle.


Feb 22, 2003·Philosophical Transactions of the Royal Society of London. Series B, Biological Sciences·T Martin EmbleyPeter Foster
Oct 24, 2015·Journal of Economic Entomology·Kenneth L Cramer, Lindsey M Zagar
Dec 15, 2005·Zoology : Analysis of Complex Systems, ZACS·J H HacksteinM Veenhuis
Nov 1, 1985·The Journal of protozoology·M Müller
Apr 15, 2018·Acta Parasitologica·Alynne da Silva BarbosaMaria Regina Reis Amendoeira

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