Heme A of cytochrome c oxicase. Structure and properties: comparisons with hemes B, C, and S and derivatives.

Caughey, Winslow S.; Smythe, GA; O'Keeffe, D H; Maskasky, JE; Smith, MI

doi:10.1016/s0021-9258(19)40860-0

Cited by 146 publications

(35 citation statements)

References 34 publications

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“…V odborné literatuře se označením "hem" nazývá většinou právě hem typu b, tj. komplex protoporfyrinu IX s atomem železa 10 . V daleko menší míře se v hemoproteinech mohou vyskytnout další typy hemů (např.…”

Section: Hemunclassified

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The Novel Role of Heme in Health and Diseases – Heme-Containing Sensor Proteins

Martínková¹

2022

Chem. Listy

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The iron atom possesses unique properties, being manifested in the heme molecule. In addition to the involvement of heme in many processes (such as oxygen or electron transport and catalysis of enzyme reaction), it can also regulate key pathways critical for health. Heme-containing sensor proteins mediate the heme regulation role. The review aims to underline the main characteristics of the heme-containing sensor proteins group, either sensing heme or sensing a gas molecule through a heme-binding site, on the example of specific representatives from each sensor subgroup.

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Section: Hemunclassified

“…Hem typu a obsahuje dlouhý hydrofobní izoprenoidní řetězec a formylovou skupinu místo jednoho z methylových substituentů. Vinylové skupiny hemu typu c tvoří kovalentní thioetherové vazby s cysteinovými zbytky proteinu 10 .…”

Section: Hemunclassified

The Novel Role of Heme in Health and Diseases – Heme-Containing Sensor Proteins

Martínková¹

2022

Chem. Listy

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“…Among the contemporary, more universal biological molecules, aromatic amino acids (phenylalanine, tyrosine, tryptophan, histidine), cystine (Pace et al, 1995;Edelhoch, 1967); pteridine (pterin and flavin), pyridine, quinone, porphyrin and corrin cofactors; as well as different isoprenoids, all absorb in the UVC, and some of them in the visible as well (see table 1). Glick, 1964, ǂ Podda et al, 1996, # Nollet et al, 2012Suttie, 2007, ¶ Hill et al, 1964, ∞ Caughey et al, 1975 It is conceivable that the pre-cofactor function of these molecules was absorption and dissipation of the available UV and visible solar photons. There is consistency in that they all absorb from 220 nm to 290 nm and beyond 320 nm but not between 290 and 320 nm as would be expected if the atmospheric aldehydes were absorbing there (Sagan, 1973).…”

Section: The Organic Pigment Tree Of Lifementioning

confidence: 99%

Fundamental molecules of life are pigments which arose and evolved to dissipate the solar spectrum

Michaelian¹,

Simeonov²

2015

Preprint

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The driving force behind the origin and evolution of life has been the thermodynamic imperative of increasing the entropy production of the biosphere through increasing the global solar photon dissipation rate. In the upper atmosphere of today, oxygen and ozone derived from life processes are performing the short wavelength UVC and UVB dissipation. On Earth's surface, water and organic pigments in water facilitate the near UV and visible photon dissipation. The first organic pigments probably formed, absorbed, and dissipated at those photochemically active wavelengths in the UVC that could have reached Earth's surface during the Archean. Proliferation of these pigments can be understood as an autocatalytic photochemical process obeying non-equilibrium thermodynamic directives related to increasing solar photon dissipation rate. Under these directives, organic pigments would have evolved over time to increase the global photon dissipation rate by; 1) increasing the ratio of their effective photon cross sections to their physical size, 2) decreasing their electronic excited state life times, 3) quenching radiative de-excitation channels (e.g. fluorescence), 4) covering ever more completely the solar spectrum, and 5) dispersing into an ever greater surface area of Earth. From knowledge of the evolution of the spectrum of G-type stars, and considering the most probable history of the transparency of Earth's atmosphere, we construct the most probable surface solar spectrum as a function of time and compare this with the history of molecular absorption maxima obtained from the available data in the literature. This comparison supports the thermodynamic dissipation theory for the origin of life, constrains models for Earth's early atmosphere, and sheds some new light on the origin of photosynthesis. K Kalisky, O., Feitelson, J., and Ottolenghi, M.: Photochemistry and fluorescence of bacteriorhopsin excited in its 280-nm band, Biochemistry, 20, 205-209, 1981. Karam, P. A.: Inconstant Sun: How solar evolution has affected cosmic and ultraviolet radiation exposure over the history

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“…Das aktive Zentrum des Enzyms, die Hämgruppe, misst 1.4 nm. [26] Ein typischer Homogenkatalysator für die Olefinpolymerisation mit einem einzigen aktiven Zentrum ist der in Abbildung 2 b gezeigte Titankomplex mit einer Ausdehnung von 1.6 nm. [27] Die Größe von Platin-oder Rhodiumnanopartikeln in Heterogenkatalysatoren beträgt 1-10 nm.…”

Section: Katalysatoren Sind Nanopartikel -Neue Modelloberflächenunclassified

Molekulare Faktoren der katalytischen Selektivität

Somorjai

Park

2008

Angewandte Chemie

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Abbildung 3. Entwicklung von Oberflächenmodellen: von der Einkristalloberfläche zu Nanopartikeln, Nanodrähten und Nanodioden. Abbildung 4. Einstufige Synthese monodisperser Rhodiumnanopartikel. acac: Acetylacetonat. Abbildung 5. Monodisperse Platinnanopartikel mit einheitlichen Größen von 1.7 bis 7.2 nm (a) und mit definierter Würfel-oder Kuboktaederform (b). Maßstab in (a): 10 nm; Maßstäbe in (b): 50 nm (links) und 5 nm (rechts). Die Prozentwerte in (b) beziehen sich auf den prozentualen Anteil der Nanopartikel mit der jeweiligen Form.

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Heme A of cytochrome c oxicase. Structure and properties: comparisons with hemes B, C, and S and derivatives.

Cited by 146 publications

References 34 publications

The Novel Role of Heme in Health and Diseases – Heme-Containing Sensor Proteins

The Novel Role of Heme in Health and Diseases – Heme-Containing Sensor Proteins

Fundamental molecules of life are pigments which arose and evolved to dissipate the solar spectrum

Molekulare Faktoren der katalytischen Selektivität

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