Primary Citation of Related Structures:   1HTM
PubMed Abstract: 
Low pH induces a conformational change in the influenza virus haemagglutinin, which then mediates fusion of the viral and host cell membranes. The three-dimensional structure of a fragment of the haemagglutinin in this conformation reveals a major refolding of the secondary and tertiary structure of the molecule ...
Low pH induces a conformational change in the influenza virus haemagglutinin, which then mediates fusion of the viral and host cell membranes. The three-dimensional structure of a fragment of the haemagglutinin in this conformation reveals a major refolding of the secondary and tertiary structure of the molecule. The apolar fusion peptide moves at least 100 A to one tip of the molecule. At the other end a helical segment unfolds, a subdomain relocates reversing the chain direction, and part of the structure becomes disordered.
Related Citations: 
Crystals of a Fragment of Influenza Haemagglutinin in the Low Ph Induced Conformation Bullough, P.A., Hughson, F.M., Treharne, A.C., Ruigrok, R.W.H., Skehel, J.J., Wiley, D.C. (1994) J Mol Biol 236: 1262
Refinement of the Influenza Virus Hemagglutinin by Simulated Annealing Weis, W.I., Brunger, A.T., Skehel, J.J., Wiley, D.C. (1990) J Mol Biol 212: 737
Studies on the Structure of the Influenza Virus Haemagglutinin at the Ph of Membrane Fusion Ruigrok, R.W.H., Aitken, A., Calder, L.J., Martin, S.R., Skehel, J.J., Wharton, S.A., Weis, W., Wiley, D.C. (1988) J Gen Virol 69: 2785
Analyses of the Antigenicity of Influenza Haemagglutinin at the Ph Optimum for Virus-Mediated Membrane Fusion Daniels, R.S., Douglas, A.R., Skehel, J.J. (1983) J Gen Virol 64: 1264
Changes in the Conformation of Influenza Virus Hemagglutinin at the Ph Optimum of Virus-Mediated Membrane Fusion Skehel, J.J., Bayley, P.M., Brown, E.B., Martin, S.R., Waterfield, M.D., White, J.M., Wilson, I.A., Wiley, D.C. (1982) Proc Natl Acad Sci U S A 79: 93
Structure of the Haemagglutinin Membrane Glycoprotein of Influenza Virus at 3 Angstroms Resolution Wilson, I.A., Skehel, J.J., Wiley, D.C. (1981) Nature 289: 366
Organizational Affiliation: 
Department of Biochemistry and Molecular Biology, Harvard University, Cambridge, Massachusetts 02138.