--- title: "Proton Electron Nuclear Double Resonance from Nitrosyl Horse Heart Myoglobin: The Role of His-E7 and Val-E11 • CBPF Index" description: "CBPF INDEX is the system that tracks the scientific and technological output of CBPF. It lists the articles, books, technical reports and other publications of the whole CBPF community." canonical_url: "https://index.cbpf.br/en/publicacoes/6ad2a767639f62b11adbb45b" locale: en meta: "og:description": "CBPF INDEX is the system that tracks the scientific and technological output of CBPF. It lists the articles, books, technical reports and other publications of the whole CBPF community." "og:image": "https://index.cbpf.br/_og/d/c_Item%2Ctitulo_~UHJvdG9uIEVsZWN0cm9uIE51Y2xlYXIgRG91YmxlIFJlc29uYW5jZSBmcm9tIE5pdHJvc3lsIEhvcnNlIEhlYXJ0IE15b2dsb2JpbjogVGhlIFJvbGUgb2YgSGlzLUU3IGFuZCBWYWwtRTEx%2Ctipo_Physics%2BNote%2Ccor_~I2E4MmMwMA%2Cautores_~TWFyY28gRmxvcmVzOyBFbGlhbmUgV2FqbmJlcmc7IEcuIEJlbXNraQ%2Cdetalhe_1999%2Csecao_Publications%2Cp_Ii9lbi9wdWJsaWNhY29lcy82YWQyYTc2NzYzOWY2MmIxMWFkYmI0NWIi%2Cs_hxUPOsSXV6BQU6Q4.png" "og:image:height": "600" "og:image:type": image/png "og:image:width": "1200" "og:title": "Proton Electron Nuclear Double Resonance from Nitrosyl Horse Heart Myoglobin: The Role of His-E7 and Val-E11 • CBPF Index" "twitter:image": "https://index.cbpf.br/_og/d/c_Item%2Ctitulo_~UHJvdG9uIEVsZWN0cm9uIE51Y2xlYXIgRG91YmxlIFJlc29uYW5jZSBmcm9tIE5pdHJvc3lsIEhvcnNlIEhlYXJ0IE15b2dsb2JpbjogVGhlIFJvbGUgb2YgSGlzLUU3IGFuZCBWYWwtRTEx%2Ctipo_Physics%2BNote%2Ccor_~I2E4MmMwMA%2Cautores_~TWFyY28gRmxvcmVzOyBFbGlhbmUgV2FqbmJlcmc7IEcuIEJlbXNraQ%2Cdetalhe_1999%2Csecao_Publications%2Cp_Ii9lbi9wdWJsaWNhY29lcy82YWQyYTc2NzYzOWY2MmIxMWFkYmI0NWIi%2Cs_hxUPOsSXV6BQU6Q4.png" --- > Index of every page on this site: [llms.txt](https://index.cbpf.br/llms.txt) **Physics Note****Published** # **Proton Electron Nuclear Double Resonance from Nitrosyl Horse Heart Myoglobin: The Role of His-E7 and Val-E11** **Marco Flores; Eliane Wajnberg; G. Bemski** 1999 [**Download PDF **0.2 MB](https://index.cbpf.br/files/publicacao/6ad2a767639f62b11adbb45b/pdf) [**Contact owner**](mailto:apub@cbpf.br?subject=Proton%20Electron%20Nuclear%20Double%20Resonance%20from%20Nitrosyl%20Horse%20Heart%20Myoglobin%3A%20The%20Role%20of%20His-E7%20and%20Val-E11) ## **Publication details**
Authors
Marco Flores; Eliane Wajnberg; G. Bemski
Type
Physics Note
Status
Published
Publication date
1999
Description
Electron Nuclear Double Resonance (ENDOR) spectroscopy has been used to study protons in nitrosyl horse heart myoglobin (MbNO). <math> ^1H\,\!</math> ENDOR spectra were recorded for different settings of the magnetic field. Detailed analysis of the ENDOR powder spectra using computer simulation, based on the “orientation-selection” principle lead to the identification of the available protons in the heme pocket. We observe hyperfine interactions of the <math>N(HisF8)-Fe^{2+}-N (NO)\,\!</math> complex with five protons in axial and with eight protons in the rhombic symmetry along different orientations including those of the principal axes of the g-tensor. Protons from His-E7 and Val-E11 residues are identified in the two symmetries, rhombic and axial, exhibited by MbNO. Our results indicate that both residues are present inside the heme pocket and help to stabilize one particular conformation.
Year
1999
Number
CBPF-NF-034/99
Linked to a thesis
No
Linked to a grant
No
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