阎润涛是中国改革开放后高考的首届(77级)大学生,上世纪80年代来美国留学,博士毕业后,在Johns Hopkins医学院付院长 Maloney的实验室从事膜蛋白研究,他在90年代初用克隆的细菌葡萄糖转运载体为研究对象,突变455个在载体膜蛋白上的氨基酸,并测量得到455个氨基酸突变体两边的数据,而后整理数据得出葡萄糖转运蛋白的工作原理是喇叭口模型,即在葡萄糖进入细胞膜喇叭口朝外,进入细胞膜后喇叭口朝内,这样得以将葡萄糖运入细胞内。这个突破性工作发表在世界最著名的专业杂志Cell(细胞)上( Yan, R. T., and P. C. Maloney. 1993. Identification of a residue in the translocation pathway of a membrane carrier. Cell 75:37–44.)。随后阎先生又用一年多时间测出了葡萄糖转运蛋白的氨基酸结构,其结果于1995年发表在PNAS《美国科学院院报》上(Yan, R. T., and P. C. Maloney. 1995. Residues in the pathway through a membrane transporter. Proc. Natl. Acad. Sci. USA 92:5973–5976.).
For my curiosity, I downloaded the two articles, one from Nature and the other one from PNAS. Since I am not in the field of protein, I don’t quite understand the work Yan et al did but with respect.
However, I was just wondering:
1. Nieng’s team studied the crystal structure of the human glucose transporter GLUT1 using X-Ray technique while you studied the structure (or residues) of UhPT (a bacterial membrane transporter) using Mutagenesis.
Are human glucose transporter GLUT1 and UhpT different or the same?
2. If different, then their structures should be different regardless of how they were determined by different techniques (X-Ray vs Mutagenesis).
3. Why you claimed that R. Yan first discovered ” 葡萄糖转运蛋白的机理及结构” if human glucose transporter GLUT1 is different from UhpT.
4. As for why Nieng’s paper did not cite your paper, I guess it is ok not to cite every paper or maybe she cited your paper indirectly.