在 Synechocystis sp。PCC 6803,基因 sll1384 在 C 终端部分在它的 N 终端部分和一个 TPR 领域与一个 DnaJ 领域编码蛋白质。sll1384 异种不在改编从野类型显示出差别到不同温度,但是几乎完全失去它趋光性的运动的能力。在有 sll1384 的互补以后,异种重获趋光性。是与电子显微镜学证明在房间表面上,变异的房间有 pili 看起来与野类型的一样。另外,转变效率在异种仍然保持未改变。Sll1384 通过蛋白质蛋白质相互作用调整 Synechocystis 的趋光性,这被要求。它是在趋光性为一个角色在 cyanobacterium 识别的第一象 DnaJ 一样蛋白质基因。
In Synechocystis sp. PCC 6803, gene sll1384 encodes a protein with a DnaJ domain at its N-terminal portion and a TPR domain at the C-terminal portion. An sll1384 mutant shows no difference from the wild type in adaptation to different temperatures, but almost completely loses its capability of phototactic movement. After complementation with sll1384, the mutant regains the phototaxis. As shown with electron microscopy, on the cell surface, mutant cells have pill that appear to be the same as that of the wild type. Also, the transformation efficiency remains unchanged in the mutant. It is postulated that Sll1384 regulates phototaxis of Synechocystis through protein-protein interaction. It is the first DnaJ-like protein gene identified in a cyanobacterium for a role in phototaxis.