Abstract
Poly(β-benzyl-L-aspartate) (PBLA) is an unusual polypeptide which is capable of going into four different conformations; namely, left-handed α helix, right-handed α helix, ω helix, and β pleatcd sheet. The present work is a complete study of normal modes and their dispersion in the unusual left-handed α form. A special feature of some dispersion curves is their tendency to bunch in the neighborhood of helix angle. It has been attributed to the presence of strong intramolecular interactions. Crossing and repulsion between the dispersion curves is also observed. The N-deuterated analogue of PBLA has been studied to check the validity of assignments and force field (Urey Bradley). Specific heat has been obtained from dispersion curves via. density-of-states. A comparative study of left-handed and right-handed forms is presented.
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L. Burman, P. Tandon, V. D. Gupta, S. Rastogi, and S. Srivastava, Polym. J., 27, 481 (1995).
H. Obata and H. Kanetsuna, J. Polym. Sci., 9, 1977 (1971).
E. M. Bradbury, B. G. Carpenter, and R. M. Stephens, Biopolymers, 6, 905 (1968).
H. Kodama, Y. Tsujita, and A. Takizawa, J. Macromol. Sci.-Phys., B17(1), 57 (1980).
B. G. Frushour and J. L. Koenig, Biopolymers, 14, 2115 (1975).
H. Kyotani and H. Kanetsuna, J. Polym. Sci., 10, 1931 (1972).
E. M. Bradbury, A. K. Downie, A. Elliott, and W. E. Hanb, Proc. Roy. Soc. (London), Ser., A, 259, 110 (1960).
J. F. Yan, G. Vanderkooi, and H. A. Scheraga, J. Chem. Phys., 49, 2713 (1968).
M. V. Krishnan and V. D. Gupta, Chem. Phys. Lett., 6, 231 (1970).
M. V. Krishnan and V. D. Gupta, Chem. Phys. Lett., 7, 285 (1970).
V. D. Gupta, S. Trevino, and H. Boutin, J. Chem. Phys., 48, 3008 (1968).
R. D. Singh and V. D. Gupta, Spectrochim. Acta, 27A, 385 (1971).
A. Gupta, P. Tandon, V. D. Gupta, S. Rastogi, and G. P. Gupta, J. Phys. Soc. Jpn., 64, 315 (1995).
L. Burman, P. Tandon, V. D. Gupta, S. Rastogi, S. Srivastava, and G. P. Gupta, J. Phys. Soc. Jpn., 64, 327 (1995).
A. M. Dwivedi and V. D. Gupta, Chem. Phys. Lett., 16, 909 (1972).
V. D. Gupta, R. D. Singh, and A. M. Dwivedi, Biopolymers, 12, 1377, (1973).
R. B. Srivastava and V. D. Gupta, Biopolymers, 13, 1965 (1974).
E. B. Wilson, J. C. Decuis, and P. C. Cross, “Molecular Vibrations: The Theory of Infrared and Raman Vibrational Spectra, Dover Publications, New YOrk. N.Y., 1980.
P. W. Higgs, Proc. Roy. Soc. (London), Ser. A, 220, 472 (1953).
W. T. King, I. M. Mills, and B. L. Crawford, J. Chem. Phys., 27, 455 (1957).
T. H. Benzinger, Nature, 229, 100 (1971).
R. Pan, M. Verma-Nair, and B. Wunderlich, J. Therm. Anal., 35, 955 (1989).
T. Miyazawa, K. Fukushima, and S. Sugano, in “Conformations of Biopolymers,” G. N. Ramchandran, Ed., Academic Press, New York & London, 1967, p 157.
S. Krimm and J. Bandekar, Adv. Protein. Chem., 38, 181 (1986).
M. J. Hanon, F. J. Boerio, and J. L. Koenig, J. Chem. Phys., 50, 2829 (1969).
O. Prasad, P. Tandon, V. D. Gupta, and S. Rastogi, J. Phys. Soc. Jpn., 64, 3100 (1995).
J. L. Koenig and P. L. Sutton, Biopolymers, 10, 89 (1971).
R. W. Snyder and P. C. Painter, Polymer, 22, 1633 (1981).
D. I. Bower and W. F. Maddams, “The Vibrational Spectroscopy of Polymers,” Cambridge University Press, Cambridge, 1989, p 154.
E. M. Bradbury, L. Brown, A. R. Downie, A. Elliott, R. D. B. Fraser, and W. E. Hanby, J. Mol. Biol., 5, 230 (1962).
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Prasad, O., Tandon, P., Gupta, V. et al. Normal Modes and Their Dispersion in α Poly(β-benzyl-L-aspartate). Polym J 28, 206–216 (1996). https://doi.org/10.1295/polymj.28.206
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DOI: https://doi.org/10.1295/polymj.28.206