Journal Article

rβCarotene Hydroxylase Gene from the Cyanobacterium <i>Synechocystis</i> sp. PCC6803

Kazumori Masamoto, Norihiko Misawa, Takakazu Kaneko, Reiko Kikuno and Hiroyuki Toh

in Plant and Cell Physiology

Published on behalf of Japanese Society of Plant Physiologists

Volume 39, issue 5, pages 560-564
Published in print May 1998 | ISSN: 0032-0781
Published online May 1998 | e-ISSN: 1471-9053 | DOI: https://dx.doi.org/10.1093/oxfordjournals.pcp.a029405
rβCarotene Hydroxylase Gene from the Cyanobacterium Synechocystis sp. PCC6803

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The ORF sll1468 of Synechocystis sp. PCC6803 was identified as a gene for rβ-carotene hydroxylase by functional complementation in a rβ-carotene-producing Escherichia coll. The gene product of ORF sll11468 added hydroxyl groups to the rβ-ionone rings of rβ-carotene (rβ,rβ-carotene) to form zeaxanthin (rβ,rβ-carotene-3,3′-diol). This newly identified rβ-carotene hydroxylase does not show overall amino acid sequence similarity to the known rβ-carotene hydroxylases. However, it showed significant sequence similarity to rβ-carotene ketolases of marine bacteria and a green alga.

Keywords: rβ-Carotene; Cyanobacterium; Hydroxylase; Synechocystis PCC6803; Zeaxanthin

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Subjects: Plant Sciences and Forestry ; Biochemistry ; Molecular and Cell Biology

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