Keyword search (3,448 papers available)


Enzymatic Synthesis of a Fluorogenic Reporter Substrate and the Development of a High-Throughput Assay for Fucosyltransferase VIII Provide a Toolkit to Probe and Inhibit Core Fucosylation.

Author(s): Soroko M, Kwan DH

Biochemistry. 2020 Jun 01;: Authors: Soroko M, Kwan DH

Article GUID: 32441090
Identification of active site residues of chorismate mutase-prephenate dehydrogenase from Escherichia coli.

Author(s): Christendat D, Turnbull J

Identification of active site residues of chorismate mutase-prephenate dehydrogenase from Escherichia coli.

Biochemistry. 1996 Apr 09;35(14):4468-79

Authors: Christendat D, Turnbull J

Abstract
Chemical modification studies...

Article GUID: 8605196
Characterization of active and inactive forms of the phenol hydroxylase stimulatory protein DmpM.

Author(s): Cadieux E, Powlowski J

Biochemistry. 1999 Aug 17;38(33):10714-22 Authors: Cadieux E, Powlowski J

Article GUID: 10451366
S-nitrosation of Ca(2+)-loaded and Ca(2+)-free recombinant calbindin D(28K) from human brain.

Author(s): Tao L, Murphy ME, English AM

Biochemistry. 2002 May 14;41(19):6185-92 Authors: Tao L, Murphy ME, English AM

Article GUID: 11994015
Mechanism of S-nitrosation of recombinant human brain calbindin D28K.

Author(s): Tao L, English AM

Biochemistry. 2003 Mar 25;42(11):3326-34 Authors: Tao L, English AM

Article GUID: 12641465
Protein S-glutathiolation triggered by decomposed S-nitrosoglutathione.

Author(s): Tao L, English AM

Biochemistry. 2004 Apr 06;43(13):4028-38 Authors: Tao L, English AM

Article GUID: 15049710
Mass spectrometric analysis of nitroxyl-mediated protein modification: comparison of products formed with free and protein-based cysteines.

Author(s): Shen B, English AM

Biochemistry. 2005 Oct 25;44(42):14030-44 Authors: Shen B, English AM

Article GUID: 16229492
A shared binding site for NAD+ and coenzyme A in an acetaldehyde dehydrogenase involved in bacterial degradation of aromatic compounds.

Author(s): Lei Y, Pawelek PD, Powlowski J

Biochemistry. 2008 Jul 01;47(26):6870-82 Authors: Lei Y, Pawelek PD, Powlowski J

Article GUID: 18537268
Backbone Flexibility Influences Nucleotide Incorporation by Human Translesion DNA Polymerase η opposite Intrastrand Cross-Linked DNA.

Author(s): O'Flaherty DK, Guengerich FP, Egli M, Wilds CJ

Biochemistry. 2015 Dec 29;54(51):7449-56 Authors: O'Flaherty DK, Guengerich FP, Egli M, Wilds CJ

Article GUID: 26624500
Proton release due to manganese binding and oxidation in modified bacterial reaction centers.

Author(s): Kálmán L, Thielges MC, Williams JC, Allen JP

Biochemistry. 2005 Oct 11;44(40):13266-73 Authors: Kálmán L, Thielges MC, Williams JC, Allen JP

Article GUID: 16201752
Light-induced conformational changes in photosynthetic reaction centers: dielectric relaxation in the vicinity of the dimer.

Author(s): Deshmukh SS, Williams JC, Allen JP, Kálmán L

Biochemistry. 2011 Jan 25;50(3):340-8 Authors: Deshmukh SS, Williams JC, Allen JP, Kálmán L

Article GUID: 21141811
Light-induced conformational changes in photosynthetic reaction centers: redox-regulated proton pathway near the dimer.

Author(s): Deshmukh SS, Williams JC, Allen JP, Kálmán L

Biochemistry. 2011 Apr 26;50(16):3321-31 Authors: Deshmukh SS, Williams JC, Allen JP, Kálmán L

Article GUID: 21410139
Light-induced conformational changes in photosynthetic reaction centers: impact of detergents and lipids on the electronic structure of the primary electron donor.

Author(s): Deshmukh SS, Akhavein H, Williams JC, Allen JP, Kalman L

Biochemistry. 2011 Jun 14;50(23):5249-62 Authors: Deshmukh SS, Akhavein H, Williams JC, Allen JP, Kalman L

Article GUID: 21561160
Title:Proton release due to manganese binding and oxidation in modified bacterial reaction centers.
Authors:Kálmán L,  Thielges MC,  Williams JC,  Allen JP
Link:https://www.ncbi.nlm.nih.gov/pubmed/16201752?dopt=Abstract
Category:Biochemistry
PMID:16201752
Dept Affiliation: PHYSICS
1 Department of Physics, Concordia University, Montreal, Quebec H4B 1R6, Canada.

Description:

Proton release due to manganese binding and oxidation in modified bacterial reaction centers.

Biochemistry. 2005 Oct 11;44(40):13266-73

Authors: Kálmán L, Thielges MC, Williams JC, Allen JP

Abstract

The pH dependence of binding and oxidation of Mn2+ in highly oxidizing reaction centers with designed metal-binding sites was characterized by light-minus-dark optical difference spectroscopy and direct measurements of proton uptake/release. These mutants bind a Mn2+ ion that can efficiently transfer an electron to the oxidized bacteriochlorophyll dimer, as described earlier [Thielges et al. (2005) Biochemistry 44, 7389-7394]. The dissociation constant, KD, significantly increased with decreasing pH. The pH dependence of KD between pH 7 and pH 8 was consistent with the binding of Mn2+ being stabilized by the electrostatic release of two protons. The strong pH dependence of proton release upon Mn2+ binding, with a maximal release of 1.4 H+ per reaction center, was interpreted as being a result of a shift in the pKa values of the coordinating residues and possibly other nearby residues. A small amount of proton release associated with Mn2+ oxidation was observed upon illumination. These results show that functional metal-binding sites can be incorporated into proteins upon consideration of both the metal coordination and protonation states of the ligands.

PMID: 16201752 [PubMed - indexed for MEDLINE]