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Ns-?s Time-Resolved Step-Scan FTIR of ba? Oxidoreductase from Thermus thermophilus: Protonic Connectivity of w941-w946-w927.


ABSTRACT: Time-resolved step-scan FTIR spectroscopy has been employed to probe the dynamics of the ba? oxidoreductase from Thermus thermophilus in the ns-?s time range and in the pH/pD 6-9 range. The data revealed a pH/pD sensitivity of the D372 residue and of the ring-A propionate of heme a?. Based on the observed transient changes a model in which the protonic connectivity of w941-w946-927 to the D372 and the ring-A propionate of heme a? is described.

SUBMITTER: Nicolaides A 

PROVIDER: S-EPMC5085690 | biostudies-literature | 2016 Sep

REPOSITORIES: biostudies-literature

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ns-μs Time-Resolved Step-Scan FTIR of ba₃ Oxidoreductase from Thermus thermophilus: Protonic Connectivity of w941-w946-w927.

Nicolaides Antonis A   Soulimane Tewfik T   Varotsis Constantinos C  

International journal of molecular sciences 20160929 10


Time-resolved step-scan FTIR spectroscopy has been employed to probe the dynamics of the <i>ba</i>₃ oxidoreductase from <i>Thermus thermophilus</i> in the ns-μs time range and in the pH/pD 6-9 range. The data revealed a pH/pD sensitivity of the D372 residue and of the ring-A propionate of heme <i>a</i>₃. Based on the observed transient changes a model in which the protonic connectivity of w941-w946-927 to the D372 and the ring-A propionate of heme <i>a</i>₃ is described. ...[more]

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