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Iron Chlorin-Reconstituted Histidine-Ligated Heme Proteins as Models for Naturally Occurring Iron Chlorin Proteins: Magnetic Circular Dichroism Spectroscopy as a Probe of Iron Chlorin Coordination Structure

Autor: Chi K. Chang, John H. Dawson, Masanori Sono, Ann M. Huff, Chengfeng Zhuang, David K. Cooper, Kevin M. Smith, Alma M. Bracete, Saloumeh Kadkhodayan

Publikováno v: Inorganic Chemistry. 33:5042-5049

Apomyoglobin, horseradish peroxidase, and cytochrome b5 have been successfully reconstituted with several iron chlorin prosthetic groups. The resulting green iron chlorin-bound derivatives have a histidine proximal ligand and therefore serve as model

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::ebd011417a1fdefe0ed1c014c8b383a4
https://doi.org/10.1021/ic00100a032

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Imidazole- and alkylamine-ligated iron(II,III) chlorin complexes as models for histidine and lysine coordination to iron in dihydroporphyrin-containing proteins: characterization with magnetic circular dichroism spectroscopy

Autor: Chi K. Chang, David K. Cooper, Ann M. Huff, Kevin M. Smith, John H. Dawson

Publikováno v: Inorganic Chemistry. 32:1460-1466

An extensive series of five- and six-coordinate (1-methylimidazole)-, (1-butylamine)-, and (pyridine)iron(II, III) chlorin complexes are characterized for the first time with magnetic circular dichroism (MCD) spectroscopy. The chlorins (dihydroporphy

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::40b5b4f13d39047c484e4d66a947f33f
https://doi.org/10.1021/ic00060a023

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Evidence that a formyl-substituted iron porphyrin is the prosthetic group of myeloperoxidase: magnetic circular dichroism similarity of the peroxidase to Spirographis heme-reconstituted myoglobin

Autor: John H. Dawson, Ann M. Huff, Alma M. Bracete, Masanori Sono, Masao Ikeda-Saito

Publikováno v: Scopus-Elsevier

To probe the identity of the active site heme-type prosthetic group of myeloperoxidase, whose structure has not been established unambiguously [proposed structures are (i) a chlorin (dihydroporphyrin) or (ii) a formyl-substituted porphyrin such as pr

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::40415a0d5f15055d55a565998bf08560
https://doi.org/10.1073/pnas.88.24.11148

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The active site structure of E. coli HPII catalase. Evidence favoring coordination of a tyrosinate proximal ligand to the chlorin iron

Autor: Masanori Sono, Caroline M. Zeitler, Ann M. Huff, Chi K. Chang, Alma M. Bracete, Saloumeh Kadkhodayan, Peter C. Loewen, John H. Dawson

Publikováno v: FEBS letters. 295(1-3)

E. coli produces 2 catalases known as HPI and HPII. While the heme prosthetic group of the HPII catalase has been established to be a dihydroporphyrin or chlorin, the identity of the proximal ligand to the iron has not been addressed. The magnetic ci

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_dedup___::303b5c3b98a46b0f42ac968e6bd74879
https://pubmed.ncbi.nlm.nih.gov/1662642

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Akademický článek

Developing the eMedical Student (eMS)—A Pilot Project Integrating Medical Students into the Tele-ICU during the COVID-19 Pandemic and beyond

Autor: Joshua Ho, Philip Susser, Cindy Christian, Horace DeLisser, Michael J. Scott, Lynn A. Pauls, Ann M. Huffenberger, C. William Hanson, John M. Chandler, Lee A. Fleisher, Krzysztof Laudanski

Publikováno v: Healthcare, Vol 9, Iss 1, p 73 (2021)

The COVID-19 pandemic has accelerated the demand for virtual healthcare delivery and highlighted the scarcity of telehealth medical student curricula, particularly tele-critical care. In partnership with the Penn E-lert program and the Department of

Externí odkaz: https://doaj.org/article/4ed7f845a21c43dab59f031c0357e758

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The preparation of phenacylpyrazoles, acylpyrazoles, imidazolylisoxazoles and imidazolylpyrazoles from c(α)-dianions of oximes, phenylhydrazones and acylhydrazones

Autor: Ann M. Huff, Richard W. Fengl, Frank C. Waters, Melanie J. Smith, Sheila A. O'Grady, Howard L. Hall, Charles F. Beam, Jeffery A. Welsh

Publikováno v: Journal of Heterocyclic Chemistry. 22:501-504

C(α),O-Dilithiooximes, C(α), N-dilithiophenylhydrazones, or C(α), N-dilithioacylhydrazones were prepared in an excess of lithium diisopropylamide (LDA) and condensed with a variety of esters followed by acid-cyclization to give substituted isoxazo

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::f290769a1697532788c3a23d238dea10
https://doi.org/10.1002/jhet.5570220259

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The preparation of selected benzopyrano[3,4-b]pyrazoles by the condensation of c(α),n-dilithiocarboalkoxyhydrazones and salicylate esters

Autor: Charles F. Beam, Ann M. Huff

Publikováno v: Journal of Heterocyclic Chemistry. 23:1343-1346

Selected C(α),N-dilithiocarboalkoxyhydrazones were prepared in an excess of lithium diisopropylamide (LDA) and condensed with a variety of salicylate esters to give intermediates that were acid-cyclized to benzopyrano[3,4-b]pyrazoles (coumarin-pyraz

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::8fdd051792ea08ef13f53da190c20541
https://doi.org/10.1002/jhet.5570230515

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The preparation and reactions of C(α),N-dilithiocarboalkoxyhydrazones

Autor: Rebecca C. Tummons, Howard L. Hall, Sheila A. O'Grady, Ann M. Huff, Charles F. Beam

Publikováno v: Journal of Heterocyclic Chemistry. 21:1897-1899

Condensations du dianion du titre avec l'iodomethane, la pentanone-3, le chloro-4' benzoate de methyle, des salicylates, le benzoylacetate d'ethyle ou le chloroformiate d'ethyle: obtention de divers carbazates, de pyrazolecarboxylates-1 et de pyrazol

Externí odkaz: https://explore.openaire.eu/search/publication?articleId=doi_________::03c6d06877de9a306859d36640e69c1a
https://doi.org/10.1002/jhet.5570210663

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