cytochromes and fe-s proteins
TRANSCRIPT
![Page 1: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/1.jpg)
Química BioinorgánicaSeminario:
Transferencia electrónica y procesos enzimáticos redoxProteínas Fe-S y Citocromos
CARLOS E. MARANGE | FRANCISCO J. PEÓN
![Page 2: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/2.jpg)
Transporte Electrónico
Cloroplastos Mitocondrias
![Page 3: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/3.jpg)
Transporte electrónico en la cadena respiratoria
NAD
Flavoproteínas
Ubiquinona
Proteínas Fe-S
Citocromos
![Page 4: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/4.jpg)
Descubiertas mediante EPR en los años 60
Participan en el transporte electrónico, mediante la oxidación/reducción de un átomo de hierro
Al menos ocho de estas proteínas están presentes en la membrana mitocondrial y su potencial de reducción varía desde -0,65 V hasta 0,45 V
![Page 5: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/5.jpg)
Proteínas Hierro - Azufre
![Page 6: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/6.jpg)
Ferredoxina
NADH deshidrogenasa
Ubiquinol-citocromo-c reductasa
Succinato deshidrogenasaNitrogenasa
![Page 7: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/7.jpg)
![Page 8: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/8.jpg)
Centros Fe-SEl hierro se encuentra mayoritariamente en
un entorno tetraédrico
![Page 9: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/9.jpg)
Equilibrio REDOX en el centro [Fe4-S4]
![Page 10: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/10.jpg)
Hidrogenasas
Ni-Fe Fe-Fe Fe
![Page 11: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/11.jpg)
Sitios activos de las Hidrogenasas
![Page 12: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/12.jpg)
Cluster Fe – S en la Nitrogenasa
![Page 13: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/13.jpg)
Citocromos
![Page 14: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/14.jpg)
![Page 15: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/15.jpg)
Fe
Grupo hemo
![Page 16: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/16.jpg)
![Page 17: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/17.jpg)
![Page 18: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/18.jpg)
Citocromos en su estado reducido (Fe2+)
Tres bandas de absorción en la zona visible del espectro EM
Bandas mayores:Citocromo a : 600 nmCitocromo b : 560 nmCitocromo c : 550 nm
![Page 19: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/19.jpg)
Citocromo - C
Citocromo – C554
![Page 20: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/20.jpg)
Sitio activo en la
citocromo c oxidasa
![Page 21: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/21.jpg)
Funciones biológicas
![Page 22: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/22.jpg)
Cadena de transporte electrónico en la membrana mitocondrial
![Page 23: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/23.jpg)
Representación esquemática de parte
de la cadena mitocondrial de trasporte electrónico
Potenciales de reducción a pH 7
![Page 24: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/24.jpg)
Apoptosis celular
![Page 25: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/25.jpg)
Química BioinorgánicaSeminario:
Transferencia electrónica y procesos enzimáticos redoxProteínas Fe-S y Citocromos
CARLOS E. MARANGE | FRANCISCO J. PEÓN
![Page 26: Cytochromes and Fe-S proteins](https://reader035.vdocument.in/reader035/viewer/2022062522/58e76fd71a28abac7d8b5455/html5/thumbnails/26.jpg)
-Bioinorganic 239-Atkins inorganic chemistry 744-Biological inorganic 226-Sharpe 851 & cap 28-SEGUIR EN BIOLOGICAL INORGANIC