Literature DB >> 3224153

Picosecond absorption studies on the photodissociation of alpha- and beta-nitrosyl hemoglobin monomers.

C R Guest1, L J Noe.   

Abstract

Transient absorption studies of the pump-probe type were performed on the NO forms of the alpha- and beta-monomers of hemoglobin using a Nd3+ phosphate-glass laser. A second harmonic 531-nm, 8-ps fwhm pulse pumped the Q-band while a delayed continuum generated pulse was used to monitor pi pi* Soret absorption changes in the 410-453-nm region. Photodissociation of nitrosyl alpha- and beta-monomers was found to differ markedly from the tetramer in what we believe to be the formation of a five-coordinate HbNO (with proximal imidazole detached) photoproduct within the first 50 ps after photon absorption.

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Year:  1988        PMID： 3224153      PMCID： PMC1330377          DOI： 10.1016/S0006-3495(88)83008-X

Source DB:  PubMed          Journal:  Biophys J        ISSN： 0006-3495            Impact factor:   4.033


  25 in total

1.  Equilibrium between six- and five-coordinated hemes in nitrosylhemoglobin: interpretation of electron spin resonance spectra.

Authors:  A Szabo; M F Perutz
Journal:  Biochemistry       Date:  1976-10-05       Impact factor: 3.162

2.  Analogous effect of protons and inositol hexaphosphate on the alteration of structure of nitrosyl fetal human hemoglobin.

Authors:  M Chevion; A Stern; J Peisach; W E Blumberg; S Simon
Journal:  Biochemistry       Date:  1978-05-02       Impact factor: 3.162

3.  Haemoglobin: the structural changes related to ligand binding and its allosteric mechanism.

Authors:  J Baldwin; C Chothia
Journal:  J Mol Biol       Date:  1979-04-05       Impact factor: 5.469

4.  Spectroscopic studies of oxy- and carbonmonoxyhemoglobin after pulsed optical excitation.

Authors:  B I Greene; R M Hochstrasser; R B Weisman; W A Eaton
Journal:  Proc Natl Acad Sci U S A       Date:  1978-11       Impact factor: 11.205

5.  Resonance Raman and EPR of nitrosyl human hemoglobin and chains, carp hemoglobin, and model compounds. Implications for the nitrosyl heme coordination state.

Authors:  D M Scholler; M Y Wang; B M Hoffman
Journal:  J Biol Chem       Date:  1979-05-25       Impact factor: 5.157

6.  Carbon monoxide binding to iron porphyrins.

Authors:  J P Collman; J I Brauman; K M Doxsee
Journal:  Proc Natl Acad Sci U S A       Date:  1979-12       Impact factor: 11.205

7.  Protein-heme interaction in hemoglobin: evidence from Raman difference spectroscopy.

Authors:  J A Shelnutt; D L Rousseau; J M Friedman; S R Simon
Journal:  Proc Natl Acad Sci U S A       Date:  1979-09       Impact factor: 11.205

8.  Thermodynamic studies on subunit assembly in human hemoglobin. Self-association of oxygenated chains (alphaSH and betaSH): determination of stoichiometries and equilibrium constants as a function of temperature.

Authors:  R Valdes; G K Ackers
Journal:  J Biol Chem       Date:  1977-01-10       Impact factor: 5.157

9.  Resonance Raman evidence for cleavage of the Fe-N epsilon(His-F8) bond in the alpha subunit of the T-structure nitrosylhemoglobin.

Authors:  K Nagai; C Welborn; D Dolphin; T Kitagawa
Journal:  Biochemistry       Date:  1980-10-14       Impact factor: 3.162

10.  The reaction of hemoglobin Zürich with oxygen and carbon monoxide.

Authors:  G M Giacometti; M Brunori; E Antonini; E E Di Iorio; K H Winterhalter
Journal:  J Biol Chem       Date:  1980-07-10       Impact factor: 5.157
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