Kajitani M, Kato A, Wada A, Inokuchi Y, Ishihama A
Department of Molecular Genetics, National Institute of Genetics, Shizuoka, Japan.
J Bacteriol. 1994 Jan;176(2):531-4. doi: 10.1128/jb.176.2.531-534.1994.
The host factor (HF-I) for phage Q beta RNA replication is a small protein of 102 amino acid residues encoded by the hfq gene at 94.8 min on the Escherichia coli chromosome. The synthesis rate of HF-I at the exponential-growth phase is higher than at the stationary phase, and it increases concomitantly with the increase in cell growth rate. The intracellular level of HF-I is about 30,000 to 60,000 molecules per cell, the majority being associated with ribosomes as one of the salt wash proteins. Taken together, we suggest that HF-I is one of the growth-related proteins.
噬菌体Qβ RNA复制的宿主因子（HF-I）是一种由102个氨基酸残基组成的小蛋白，由大肠杆菌染色体上94.8分钟处的hfq基因编码。HF-I在指数生长期的合成速率高于稳定期，并且随着细胞生长速率的增加而同步增加。HF-I的细胞内水平约为每个细胞30,000至60,000个分子，其中大部分作为盐洗蛋白之一与核糖体结合。综上所述，我们认为HF-I是一种与生长相关的蛋白。
