Recognition and discrimination of gases by the oxygen-sensing signal transducer protein HemAT as revealed by FTIR spectroscopy
dc.contributor.author | Pinakoulaki, Eftychia | en |
dc.contributor.author | Yoshimura, H. | en |
dc.contributor.author | Yoshioka, S. | en |
dc.contributor.author | Aono, S. | en |
dc.contributor.author | Varotsis, Constantinos | en |
dc.creator | Pinakoulaki, Eftychia | en |
dc.creator | Yoshimura, H. | en |
dc.creator | Yoshioka, S. | en |
dc.creator | Aono, S. | en |
dc.creator | Varotsis, Constantinos | en |
dc.date.accessioned | 2019-11-21T06:22:24Z | |
dc.date.available | 2019-11-21T06:22:24Z | |
dc.date.issued | 2006 | |
dc.identifier.uri | http://gnosis.library.ucy.ac.cy/handle/7/56041 | |
dc.description.abstract | The determination of ligand binding properties is a key step in our understanding of gas sensing and discrimination by gas sensory proteins. HemAT is a newly discovered signal transducer heme protein that recognizes O 2 and discriminates against other gases such as CO and NO. We have used FTIR spectroscopy on CO- and NO-bound sensor domain HemAT and sensor domain distal mutants Y70F, T95A, R91A, and L92A to gain insight into the structure of the iron-bound ligand at ambient temperature. These mutations were designed to perturb the electrostatic field near the iron-bound gaseous ligand and also allow us to investigate the communication pathway between the distal residues of the protein and the heme. We show the formation of both H-bonded and non-H-bonded conformations in the CO-bound forms. In addition, we report the presence of multiple conformations in the NO-bound forms. Such distal H-bonding is crucial for ligand binding and activation by the heme. The comparison of the O2, NO, and CO data demonstrates that Thr95 and Tyr70 are crucial for ligand recognition and discrimination and, thus, for specific sensing of gases, and L92 is crucial for controlling the conformational changes of the Thr95 and Tyr70 residues upon NO binding. © 2006 American Chemical Society. | en |
dc.source | Biochemistry | en |
dc.source.uri | https://www.scopus.com/inward/record.uri?eid=2-s2.0-33746912769&doi=10.1021%2fbi0604072&partnerID=40&md5=de2bb5a3690e5727cc0b6d9adffa019c | |
dc.subject | article | en |
dc.subject | priority journal | en |
dc.subject | unclassified drug | en |
dc.subject | signal transduction | en |
dc.subject | protein | en |
dc.subject | mutation | en |
dc.subject | Oxygen | en |
dc.subject | Hydrogen bonds | en |
dc.subject | Transducers | en |
dc.subject | Fourier transform infrared spectroscopy | en |
dc.subject | hydrogen bond | en |
dc.subject | Bacterial Proteins | en |
dc.subject | Proteins | en |
dc.subject | Amino Acid Sequence | en |
dc.subject | Protein Conformation | en |
dc.subject | tyrosine | en |
dc.subject | threonine | en |
dc.subject | Binding Sites | en |
dc.subject | conformational transition | en |
dc.subject | nitric oxide | en |
dc.subject | Molecular structure | en |
dc.subject | Spectroscopy, Fourier Transform Infrared | en |
dc.subject | carbon monoxide | en |
dc.subject | heme | en |
dc.subject | Hemeproteins | en |
dc.subject | hemoprotein | en |
dc.subject | ligand binding | en |
dc.subject | Hydrogen Bonding | en |
dc.subject | electric field | en |
dc.subject | Chemical sensors | en |
dc.subject | Conformational changes | en |
dc.subject | Gas sensing | en |
dc.subject | Ligand | en |
dc.subject | Mutants | en |
dc.subject | protein HemAT | en |
dc.title | Recognition and discrimination of gases by the oxygen-sensing signal transducer protein HemAT as revealed by FTIR spectroscopy | en |
dc.type | info:eu-repo/semantics/article | |
dc.identifier.doi | 10.1021/bi0604072 | |
dc.description.volume | 45 | |
dc.description.issue | 25 | |
dc.description.startingpage | 7763 | |
dc.description.endingpage | 7766 | |
dc.author.faculty | 002 Σχολή Θετικών και Εφαρμοσμένων Επιστημών / Faculty of Pure and Applied Sciences | |
dc.author.department | Τμήμα Χημείας / Department of Chemistry | |
dc.type.uhtype | Article | en |
dc.description.notes | <p>Cited By :18</p> | en |
dc.source.abbreviation | Biochemistry | en |
dc.contributor.orcid | Pinakoulaki, Eftychia [0000-0003-3320-6112] | |
dc.contributor.orcid | Varotsis, Constantinos [0000-0003-2771-8891] | |
dc.gnosis.orcid | 0000-0003-3320-6112 | |
dc.gnosis.orcid | 0000-0003-2771-8891 |
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