Advances in Heme Proteins

A special issue of Biomolecules (ISSN 2218-273X).

Deadline for manuscript submissions: closed (31 October 2016) | Viewed by 5949

Special Issue Editor


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Guest Editor
Department of Chemistry, Emory University, Atlanta, GA 30322, USA
Interests: heme sensors; bacterial oxygen sensing; cyclic nucleotide signaling

Special Issue Information

Dear Colleagues,

Heme proteins have evolved to conduct numerous functions, from catalysis to electron transfer to sensing. The explosion of available genome sequences has led to identification of heme proteins with novel catalytic activities and functions both in vitro and in vivo, and allowed for new insights into the role of the protein scaffold in controlling reactivity.

We encourage scientists investigating heme proteins using methods from diverse fields (biophysics, bioinorganic chemistry, enzymology, cell/micro-biology, etc.) to contribute a review or original research article exploring the structures and functions of heme proteins and model systems.

Dr. Emily Weinert
Guest Editor

Manuscript Submission Information

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Keywords

  • heme
  • P450
  • electron transfer
  • gas sensing
  • redox sensing
  • porphyrin chemistry
  • heme protein catalysis
  • porphyrin

Published Papers (1 paper)

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Research

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Article
Continuous Reusability using Immobilized HasApf in Chemoenzymatic Deracemization: A New Heterogeneous Enzyme Catalysis
by Hiroyuki Nagaoka
Biomolecules 2016, 6(4), 41; https://doi.org/10.3390/biom6040041 - 25 Oct 2016
Cited by 2 | Viewed by 5550
Abstract
This study found that the calibration curve of heme acquisition system A (HasA, a new reactive active species) immobilized by a porous ceramic particle (ImHApf; immobilized HasA from Pseudomonas fluorescens) can be constructed in the range of 1750–1450 cm−1 using Fourier [...] Read more.
This study found that the calibration curve of heme acquisition system A (HasA, a new reactive active species) immobilized by a porous ceramic particle (ImHApf; immobilized HasA from Pseudomonas fluorescens) can be constructed in the range of 1750–1450 cm−1 using Fourier transform infrared spectroscopy (FTIR) analysis, and evaluated its catalytic efficiency. In the asymmetric oxidation of rac-1-(6-methoxynaphthalen-2-yl)ethanol (rac-1: a naproxen precursor), a product ketone from the (R)-isomer is desymmetrized using NaBH4 and continuously reused even if treated with an organic solvent in 50 mM glycine–NaOH buffer at 40 °C in the absence of nicotinamide adenine dinucleotide (NAD(P)), leading to >99% enantiomeric excess and >90% chemical yield; the activity was calculated at 0.74 ± 0.03 mU/(mg·min) and the turnover number was determined to be approximately 2 × 106. It was confirmed that the other sec-alcohols such as rac-1-(2-naphthyl)ethanol (rac-2) and m- and p-substituted rac-1-phenyl ethanols (rac-3ab6ab) using ImHApf can also yield a single stereoisomer from a racemate. Therefore, HasA immobilization can be expected to become an important tool for building an environmentally friendly system that promotes industrial sustainability. Full article
(This article belongs to the Special Issue Advances in Heme Proteins)
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