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Plant and Cell Physiology, 1986, Vol. 27, No. 3 485-490
© 1986

Article

Glucolipid Synthesis Activities in Cytoplasmic and Thylakoid Membranes from the Cyanobacterium Anacystis nidulans

Tatsuo Omata1 and Norio Murata2

Department of Biology, College of Arts and Sciences, University of Tokyo Komaba, Meguro-ku, Tokyo 153, Japan
National Institute for Basic Biology Myodaiji, Okazaki 444, Japan

2To whom reprint requests should be addressed.

Cytoplasmic membranes (plasma membranes), thylakoid membranes and cell walls prepared from the cyanobacterium, Anacystis nidulans, were compared for UDP-glucose: l,2-diacylglycerol glucosyltransferase activity. When 1,2-dipalmitoylglycerol was added as a glucosyl acceptor, both cytoplasmic membranes and thylakoid membranes incorporated glucose from UDP-glucose into monoglucosyl diacylglycerol, but the cell walls containing the outer membranes did not. The cytoplasmic membranes incorporated about twice as much glucose as the thylakoid membranes on a protein basis. These observations suggest that in A. nidulans the UDP-glucose: 1,2-diacylglycerol glucosyltransferase participating in glucolipid biosynthesis is located in both cytoplasmic and thylakoid membranes, but not in the outer membrane.

1Solar Energy Research Group, The Institute of Physical and Chemical Research (RIKEN), Wako-shi, Saitama 351-01, Japan.

(Received November 21, 1985; Accepted January 27, 1986)
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