Structural determinants of fluoride and formate binding to hemoglobin and myoglobin: crystallographic and 1H-NMR relaxometric study.
The x-ray crystal structure of the fluoride derivative of ferric sperm whale (Physeter catodon) myoglobin (Mb) has been determined at 2.5 A resolution (R = 0.187) by difference Fourier techniques. The fluoride anion, sitting in the central part of the heme distal site and coordinated to the heme iro...
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ftpubmed:oai:pubmedcentral.nih.gov:1224947 2023-05-15T18:26:38+02:00 Structural determinants of fluoride and formate binding to hemoglobin and myoglobin: crystallographic and 1H-NMR relaxometric study. Aime, S Fasano, M Paoletti, S Cutruzzolà, F Desideri, A Bolognesi, M Rizzi, M Ascenzi, P 1996-01 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1224947 http://www.ncbi.nlm.nih.gov/pubmed/8770225 en eng http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1224947 http://www.ncbi.nlm.nih.gov/pubmed/8770225 Research Article Text 1996 ftpubmed 2013-08-30T14:16:42Z The x-ray crystal structure of the fluoride derivative of ferric sperm whale (Physeter catodon) myoglobin (Mb) has been determined at 2.5 A resolution (R = 0.187) by difference Fourier techniques. The fluoride anion, sitting in the central part of the heme distal site and coordinated to the heme iron, is hydrogen bonded to the distal His(64)E7 NE2 atom and to the W195 solvent water molecule. This water molecule also significantly interacts with the same HisE7 residue, which stabilizes the coordinated fluoride ion. Moreover, fluoride and formate binding to ferric Aplysia limacina Mb, sperm whale (Physeter catodon) Mb, horse (Caballus caballus) Mb, loggerhead sea turtle (Caretta caretta) Mb, and human hemoglobin has been investigated by 1H-NMR relaxometry. A strong solvent proton relaxation enhancement is observed for the fluoride derivatives of hemoproteins containing HisE7. Conversely, only a small outer-sphere contribution to the solvent relaxation rate has been observed for all of the formate derivatives considered and for the A. limacina Mb:fluoride derivative, where HisE7 is replaced by Val. Text Sperm whale PubMed Central (PMC) Catodon ENVELOPE(-59.966,-59.966,-63.500,-63.500) |
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Research Article Aime, S Fasano, M Paoletti, S Cutruzzolà, F Desideri, A Bolognesi, M Rizzi, M Ascenzi, P Structural determinants of fluoride and formate binding to hemoglobin and myoglobin: crystallographic and 1H-NMR relaxometric study. |
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Research Article |
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The x-ray crystal structure of the fluoride derivative of ferric sperm whale (Physeter catodon) myoglobin (Mb) has been determined at 2.5 A resolution (R = 0.187) by difference Fourier techniques. The fluoride anion, sitting in the central part of the heme distal site and coordinated to the heme iron, is hydrogen bonded to the distal His(64)E7 NE2 atom and to the W195 solvent water molecule. This water molecule also significantly interacts with the same HisE7 residue, which stabilizes the coordinated fluoride ion. Moreover, fluoride and formate binding to ferric Aplysia limacina Mb, sperm whale (Physeter catodon) Mb, horse (Caballus caballus) Mb, loggerhead sea turtle (Caretta caretta) Mb, and human hemoglobin has been investigated by 1H-NMR relaxometry. A strong solvent proton relaxation enhancement is observed for the fluoride derivatives of hemoproteins containing HisE7. Conversely, only a small outer-sphere contribution to the solvent relaxation rate has been observed for all of the formate derivatives considered and for the A. limacina Mb:fluoride derivative, where HisE7 is replaced by Val. |
format |
Text |
author |
Aime, S Fasano, M Paoletti, S Cutruzzolà, F Desideri, A Bolognesi, M Rizzi, M Ascenzi, P |
author_facet |
Aime, S Fasano, M Paoletti, S Cutruzzolà, F Desideri, A Bolognesi, M Rizzi, M Ascenzi, P |
author_sort |
Aime, S |
title |
Structural determinants of fluoride and formate binding to hemoglobin and myoglobin: crystallographic and 1H-NMR relaxometric study. |
title_short |
Structural determinants of fluoride and formate binding to hemoglobin and myoglobin: crystallographic and 1H-NMR relaxometric study. |
title_full |
Structural determinants of fluoride and formate binding to hemoglobin and myoglobin: crystallographic and 1H-NMR relaxometric study. |
title_fullStr |
Structural determinants of fluoride and formate binding to hemoglobin and myoglobin: crystallographic and 1H-NMR relaxometric study. |
title_full_unstemmed |
Structural determinants of fluoride and formate binding to hemoglobin and myoglobin: crystallographic and 1H-NMR relaxometric study. |
title_sort |
structural determinants of fluoride and formate binding to hemoglobin and myoglobin: crystallographic and 1h-nmr relaxometric study. |
publishDate |
1996 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1224947 http://www.ncbi.nlm.nih.gov/pubmed/8770225 |
long_lat |
ENVELOPE(-59.966,-59.966,-63.500,-63.500) |
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Catodon |
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Catodon |
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Sperm whale |
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Sperm whale |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC1224947 http://www.ncbi.nlm.nih.gov/pubmed/8770225 |
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1766208604405235712 |