Hensel G, Trüper H G
Arch Microbiol. 1976 Aug;109(1-2):101-3. doi: 10.1007/BF00425119.
Forteen species (17 strains) of phototrophic bacteria as well as one strain of Thiobacillus denitrificans were tested for cysteine synthase and S-sulfocysteine synthase. All strains contain cysteine sythase active with O-acetylserine; only the Chromatiaceae, two species of the Rhodospirillaceae and T. denitrificans contain S-sulfocysteine synthase. In six species repression by different sulfur compounds in the medium was studied. In Chromatium vinosum, cysteine synthase was found to be constitutive, while in the Rhodospirillaceae tested the enzyme is repressed by sulfide. Thiosulfate had a derepressive effect in Rhodopseudomonas globiformis but strongly repressed cysteine synthase in R. sulfidophila and R. palustris. Cysteine had only moderate effects with the species tested.
对14种（17株）光合细菌以及1株脱氮硫杆菌进行了半胱氨酸合酶和S-磺基半胱氨酸合酶的测试。所有菌株都含有对O-乙酰丝氨酸有活性的半胱氨酸合酶；只有着色菌科、红螺菌科的两个种以及脱氮硫杆菌含有S-磺基半胱氨酸合酶。研究了6个种在培养基中不同硫化合物的阻遏作用。在嗜硫小红卵菌中，发现半胱氨酸合酶是组成型的，而在所测试的红螺菌科中，该酶受硫化物阻遏。硫代硫酸盐在球形红假单胞菌中具有去阻遏作用，但在嗜硫红假单胞菌和沼泽红假单胞菌中强烈抑制半胱氨酸合酶。半胱氨酸对所测试的种只有中等程度的影响。
