Faculty Collaboration Database

Effects of systematic peripheral group deuteration on the low-frequency resonance Raman spectra of myoglobin derivatives. Biopolymers 2004 Oct 15;75(3):217-28

Date

09/21/2004

Pubmed ID

15378481

DOI

10.1002/bip.20115

Scopus ID

2-s2.0-7044247187 (requires institutional sign-in at Scopus site)   21 Citations

Abstract

Resonance Raman spectra are reported for a series of systematically deuterated analogues of myoglobin in its deoxy state as well as for its CO and O(2) adducts. Specifically, the myoglobin samples studied are those that have been reconstituted with deuterated protoheme analogues. These include the methine deuterated, protoheme-d4; analogue bearing C(2)H(3) groups at the 1, 3, 5, and 8 positions, protoheme-d12; the species bearing C(2)H(3) groups at the 1 and 3 positions only, 1,3-protoheme-d6; and the species bearing C(2)H(3) groups at the 5 and 8 positions only, 5,8-protoheme-d6. While the results are generally consistent with previously reported data for synthetic metalloporphyrin models and previous studies of labeled heme proteins, the high-quality low-frequency RR data reported here reveal several important aspects of these low-frequency modes. Of special interest is the fact that, using the two d6-protoheme analogues, it is shown that certain modes are apparently localized on particular pyrrole rings, while others are localized on different rings; i.e., several of these low-frequency modes are localized on one side of the heme.

Author List

Mak PJ, Podstawka E, Kincaid JR, Proniewicz LM

Author

James Kincaid PhD Department Chair and Professor, Biophysical Chemistry in the Chemistry department at Marquette University

MESH terms used to index this publication - Major topics in bold

Animals
Binding Sites
Deuterium
Heme
Horses
Methane
Myoglobin
Nuclear Magnetic Resonance, Biomolecular
Spectrum Analysis, Raman
Time Factors