Verhoeyen M, Van Rompuy L, Jou W M, Huylebroeck D, Fiers W
Nucleic Acids Res. 1983 Jul 25;11(14):4703-12. doi: 10.1093/nar/11.14.4703.
The complete nucleotide sequence of the hemagglutinin (HA) gene of the human type B influenza virus B/Singapore/222/79 is presented. Comparison with the only other known sequence of a B hemagglutinin (B/Lee/40) shows that antigenic drift in type B HA genes is essentially the same as already observed within the influenza A H3 subtype, i.e., an accumulation of point mutations. The main difference is that the apparent evolution is significantly slower, most likely due to the cumulative effect of a lower occurrence in the population (slower evolution) and/or less immunological pressure. There is a striking cluster of changes at positions 127 until 137 of the HA1 subunit which may represent one of the antigenic sites of the molecule.
本文给出了B型流感病毒B/新加坡/222/79血凝素(HA)基因的完整核苷酸序列。与另一个已知的B型血凝素序列(B/李/40)比较表明,B型HA基因中的抗原漂移与甲型流感病毒H3亚型中已观察到的情况基本相同,即点突变的积累。主要区别在于,明显的进化速度明显较慢,最可能的原因是人群中出现频率较低(进化较慢)和/或免疫压力较小的累积效应。在HA1亚基的127至137位有一组显著的变化,这可能代表了该分子的一个抗原位点。