Girbal L, Vasconcelos I, Soucaille P
Centre de Ingénierie Gilbert Durand, Institut National des Sciences Appliquées, Toulouse, France.
J Bacteriol. 1994 Oct;176(19):6146-7. doi: 10.1128/jb.176.19.6146-6147.1994.
Evidence is reported here that alkalinization of Clostridium acetobutylicum cytoplasm involves hydrogenase activity. A decrease of in vivo hydrogenase activity is accompanied by intracellular accumulation of protons leading to a negative (interior acidic) pH gradient. However, the organism is able to maintain a constant proton motive force by interconverting chemical and electrical potentials.
本文报道的证据表明,丙酮丁醇梭菌细胞质的碱化涉及氢化酶活性。体内氢化酶活性的降低伴随着质子在细胞内的积累,导致负的(内部酸性)pH梯度。然而,该生物体能够通过化学势和电势的相互转换来维持恒定的质子动力。