Literature DB >> 7074195

Kinetics and temperature dependence of carboxymyoglobin ligand photodissociation.

A H Reynolds, P M Rentzepis.   

Abstract

We have observed the rate of oxymyoglobin (MbO2) photodissociation at room temperature and carboxymyoglobin (MbCO) photodissociation as a function of temperature (260-10 K) by means of picosecond spectroscopy. The Mb + O2 and Mb + CO photodissociated states have also been characterized. Based on the picosecond experimental data, we postulate that the photodissociation of ligated myoglobin is a nonactivitated process, and the mechanism involves either a small enthalpy barrier or none at all.

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Year:  1982        PMID： 7074195      PMCID： PMC1328808          DOI： 10.1016/S0006-3495(82)84525-6

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


  6 in total

1.  The conversion of trivalent to divalent iron in hemoglobin of various species.

Authors:  C Bauer; B Pacyna
Journal:  Anal Biochem       Date:  1975-05-12       Impact factor: 3.365

2.  Picosecond dynamics of iron proteins.

Authors:  D Huppert; K D Straub; P M Rentzepis
Journal:  Proc Natl Acad Sci U S A       Date:  1977-10       Impact factor: 11.205

3.  Kinetics of carboxymyoglobin and oxymyoglobin studied by picosecond spectroscopy.

Authors:  W G Eisert; E O Degenkolb; L J Noe; P M Rentzepis
Journal:  Biophys J       Date:  1979-03       Impact factor: 4.033

4.  Picosecond photodissociation and subsequent recombination processes in carbon monoxide hemoglobin.

Authors:  L J Noe; W G Eisert; P M Rentzepis
Journal:  Proc Natl Acad Sci U S A       Date:  1978-02       Impact factor: 11.205

5.  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

6.  Mechanisms for excited state relaxation and dissociation of oxymyoglobin and carboxymyoglobin.

Authors:  A H Reynolds; S D Rand; P M Rentzepis
Journal:  Proc Natl Acad Sci U S A       Date:  1981-04       Impact factor: 11.205
  6 in total
  4 in total

1.  Time-resolved circular dichroism and absorption studies of the photolysis reaction of (carbonmonoxy)myoglobin.

Authors:  S J Milder; S C Bjorling; I D Kuntz; D S Kliger
Journal:  Biophys J       Date:  1988-05       Impact factor: 4.033

2.  Picosecond spectroscopy of Cu(II) cytochrome c.

Authors:  A H Reynolds; K D Straub; P M Rentzepis
Journal:  Biophys J       Date:  1982-10       Impact factor: 4.033

3.  Femtosecond photolysis of CO-ligated protoheme and hemoproteins: appearance of deoxy species with a 350-fsec time constant.

Authors:  J L Martin; A Migus; C Poyart; Y Lecarpentier; R Astier; A Antonetti
Journal:  Proc Natl Acad Sci U S A       Date:  1983-01       Impact factor: 11.205

4.  Ultrafast ligand rebinding in the heme domain of the oxygen sensors FixL and Dos: general regulatory implications for heme-based sensors.

Authors:  Ursula Liebl; Latifa Bouzhir-Sima; Michel Negrerie; Jean-Louis Martin; Marten H Vos
Journal:  Proc Natl Acad Sci U S A       Date:  2002-09-23       Impact factor: 11.205
  4 in total

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