Structure of carboxymyoglobin in crystals and in solution.
The configuration of the heme-carbonyl group upon binding of carbon monoxide to sperm whale myoglobin (Mb) in crystals is evaluated on the basis of infrared spectroscopic methods. Multiplets of the totally symmetric C-O stretching mode are observed for the heme-bound ligand near 1933, 1944, and 1967...
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ftpubmed:oai:pubmedcentral.nih.gov:411796 2023-05-15T18:26:44+02:00 Structure of carboxymyoglobin in crystals and in solution. Makinen, M W Houtchens, R A Caughey, W S 1979-12 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC411796 http://www.ncbi.nlm.nih.gov/pubmed/293700 en eng http://www.ncbi.nlm.nih.gov/pmc/articles/PMC411796 http://www.ncbi.nlm.nih.gov/pubmed/293700 Research Article Text 1979 ftpubmed 2013-08-29T23:26:00Z The configuration of the heme-carbonyl group upon binding of carbon monoxide to sperm whale myoglobin (Mb) in crystals is evaluated on the basis of infrared spectroscopic methods. Multiplets of the totally symmetric C-O stretching mode are observed for the heme-bound ligand near 1933, 1944, and 1967 cm-1, corresponding to three different heme-carbonyl conformers. Variations in the relative proportions of these conformers can be induced by incorporation of small fractions of metMb or deoxyMb into MbCO crystals. The configuration of the iron-carbonyl with respect to the immediate coordination environment of the heme iron is assigned for each v(CO) stretching frequency on the basis of a detailed comparison of the three-dimensional structures of the heme environments of MbCO, metMb, and deoxyMb defined by crystallographic methods. The structures of the three heme-carbonyl conformers account for the v(CO) infrared absorption bands that can be observed for MbCO in solution. Text Sperm whale PubMed Central (PMC) |
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Research Article Makinen, M W Houtchens, R A Caughey, W S Structure of carboxymyoglobin in crystals and in solution. |
topic_facet |
Research Article |
description |
The configuration of the heme-carbonyl group upon binding of carbon monoxide to sperm whale myoglobin (Mb) in crystals is evaluated on the basis of infrared spectroscopic methods. Multiplets of the totally symmetric C-O stretching mode are observed for the heme-bound ligand near 1933, 1944, and 1967 cm-1, corresponding to three different heme-carbonyl conformers. Variations in the relative proportions of these conformers can be induced by incorporation of small fractions of metMb or deoxyMb into MbCO crystals. The configuration of the iron-carbonyl with respect to the immediate coordination environment of the heme iron is assigned for each v(CO) stretching frequency on the basis of a detailed comparison of the three-dimensional structures of the heme environments of MbCO, metMb, and deoxyMb defined by crystallographic methods. The structures of the three heme-carbonyl conformers account for the v(CO) infrared absorption bands that can be observed for MbCO in solution. |
format |
Text |
author |
Makinen, M W Houtchens, R A Caughey, W S |
author_facet |
Makinen, M W Houtchens, R A Caughey, W S |
author_sort |
Makinen, M W |
title |
Structure of carboxymyoglobin in crystals and in solution. |
title_short |
Structure of carboxymyoglobin in crystals and in solution. |
title_full |
Structure of carboxymyoglobin in crystals and in solution. |
title_fullStr |
Structure of carboxymyoglobin in crystals and in solution. |
title_full_unstemmed |
Structure of carboxymyoglobin in crystals and in solution. |
title_sort |
structure of carboxymyoglobin in crystals and in solution. |
publishDate |
1979 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC411796 http://www.ncbi.nlm.nih.gov/pubmed/293700 |
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Sperm whale |
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Sperm whale |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC411796 http://www.ncbi.nlm.nih.gov/pubmed/293700 |
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1766208700280733696 |