VIBRATIONAL CIRCULAR DICHROISM STUDIES OF AZIDOMETHEMOGLOBIN AND AZIDOMETYOGLOBIN
$^{1}$ Marcott, C: Havel, H.A: Hedland, F; Overend, J.; Moscowitz, A. In Optical Activity and Chiral Discrimination, Mason, S. F. Ed., Reidel, Dordrecht, 1979, pp 289.292. Author Institution: Department of Chemistry, Syracuse University; Department of Chemistry, University of Pittsburgh; Department...
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ftohiostateu:oai:kb.osu.edu:1811/18319 2024-06-02T08:14:53+00:00 VIBRATIONAL CIRCULAR DICHROISM STUDIES OF AZIDOMETHEMOGLOBIN AND AZIDOMETYOGLOBIN Freedman, T. B. Ragunathan, N. Nafie, L. A. Larkin, P. J. Asher, S. A. Springer, B. Sligar, S. Noble, R. W. 1990 71733 bytes image/jpeg http://hdl.handle.net/1811/18319 English eng Ohio State University 1990-TG'-1 http://hdl.handle.net/1811/18319 article 1990 ftohiostateu 2024-05-06T11:00:42Z $^{1}$ Marcott, C: Havel, H.A: Hedland, F; Overend, J.; Moscowitz, A. In Optical Activity and Chiral Discrimination, Mason, S. F. Ed., Reidel, Dordrecht, 1979, pp 289.292. Author Institution: Department of Chemistry, Syracuse University; Department of Chemistry, University of Pittsburgh; Department of Biochemistry, University of lllinois; Department of Medicine and Biochemistry, State University of New York We have investigated the vibrational circular dichroism associated with the antisymmetric stretch of azide ion bound to several methemoglobins (human, carp) and metmyoglobins (horse, sperm whale, reconstituted with modified heme, and mutant). There is no VCD intensity correspondin to the absorption feature arising from azide bound to high-spin iron. A negative VCD feature $(g = -1.3 \times 10^{3})$ is observed for azide ion bound to low-spin iron; this feature is absent in a mutant myolobin in which the distal histidine is replaced with glycine. For the normal proteins, the VCD anistropy ratio is slightly larger in myoglobin compared to hemoglobin, but is not affected by using $D_{2}O$ rather than $H_{2}O$ solvent. Our results differ in magnitude from those originally reported by Marcott $et al^{1}$. The relationship between the structure of the ligand binding site in the heme proteins and the VCD intensity wil be discussed Article in Journal/Newspaper Sperm whale Ohio State University (OSU): Knowledge Bank |
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Ohio State University (OSU): Knowledge Bank |
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$^{1}$ Marcott, C: Havel, H.A: Hedland, F; Overend, J.; Moscowitz, A. In Optical Activity and Chiral Discrimination, Mason, S. F. Ed., Reidel, Dordrecht, 1979, pp 289.292. Author Institution: Department of Chemistry, Syracuse University; Department of Chemistry, University of Pittsburgh; Department of Biochemistry, University of lllinois; Department of Medicine and Biochemistry, State University of New York We have investigated the vibrational circular dichroism associated with the antisymmetric stretch of azide ion bound to several methemoglobins (human, carp) and metmyoglobins (horse, sperm whale, reconstituted with modified heme, and mutant). There is no VCD intensity correspondin to the absorption feature arising from azide bound to high-spin iron. A negative VCD feature $(g = -1.3 \times 10^{3})$ is observed for azide ion bound to low-spin iron; this feature is absent in a mutant myolobin in which the distal histidine is replaced with glycine. For the normal proteins, the VCD anistropy ratio is slightly larger in myoglobin compared to hemoglobin, but is not affected by using $D_{2}O$ rather than $H_{2}O$ solvent. Our results differ in magnitude from those originally reported by Marcott $et al^{1}$. The relationship between the structure of the ligand binding site in the heme proteins and the VCD intensity wil be discussed |
format |
Article in Journal/Newspaper |
author |
Freedman, T. B. Ragunathan, N. Nafie, L. A. Larkin, P. J. Asher, S. A. Springer, B. Sligar, S. Noble, R. W. |
spellingShingle |
Freedman, T. B. Ragunathan, N. Nafie, L. A. Larkin, P. J. Asher, S. A. Springer, B. Sligar, S. Noble, R. W. VIBRATIONAL CIRCULAR DICHROISM STUDIES OF AZIDOMETHEMOGLOBIN AND AZIDOMETYOGLOBIN |
author_facet |
Freedman, T. B. Ragunathan, N. Nafie, L. A. Larkin, P. J. Asher, S. A. Springer, B. Sligar, S. Noble, R. W. |
author_sort |
Freedman, T. B. |
title |
VIBRATIONAL CIRCULAR DICHROISM STUDIES OF AZIDOMETHEMOGLOBIN AND AZIDOMETYOGLOBIN |
title_short |
VIBRATIONAL CIRCULAR DICHROISM STUDIES OF AZIDOMETHEMOGLOBIN AND AZIDOMETYOGLOBIN |
title_full |
VIBRATIONAL CIRCULAR DICHROISM STUDIES OF AZIDOMETHEMOGLOBIN AND AZIDOMETYOGLOBIN |
title_fullStr |
VIBRATIONAL CIRCULAR DICHROISM STUDIES OF AZIDOMETHEMOGLOBIN AND AZIDOMETYOGLOBIN |
title_full_unstemmed |
VIBRATIONAL CIRCULAR DICHROISM STUDIES OF AZIDOMETHEMOGLOBIN AND AZIDOMETYOGLOBIN |
title_sort |
vibrational circular dichroism studies of azidomethemoglobin and azidometyoglobin |
publisher |
Ohio State University |
publishDate |
1990 |
url |
http://hdl.handle.net/1811/18319 |
genre |
Sperm whale |
genre_facet |
Sperm whale |
op_relation |
1990-TG'-1 http://hdl.handle.net/1811/18319 |
_version_ |
1800738891319214080 |