Sandbox Reserved 1616
From Proteopedia
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The overall mechanism of bd oxidases involves an exergonic reduction reaction of molecular oxygen into water (Figure 1). During this reaction, a proton gradient is generated in order to assist in the conservation of energy. Unlike other terminal oxidases, bd oxidases do not use a proton pump. Instead, bd oxidases use a form of vectorial chemistry that releases protons from the quinol oxidation into the positive, periplasmic side of the membrane. Protons that are required for the water formation are then consumed from the negative, cytoplasmic side of the membrane, thus creating the previously mentioned proton gradient. | The overall mechanism of bd oxidases involves an exergonic reduction reaction of molecular oxygen into water (Figure 1). During this reaction, a proton gradient is generated in order to assist in the conservation of energy. Unlike other terminal oxidases, bd oxidases do not use a proton pump. Instead, bd oxidases use a form of vectorial chemistry that releases protons from the quinol oxidation into the positive, periplasmic side of the membrane. Protons that are required for the water formation are then consumed from the negative, cytoplasmic side of the membrane, thus creating the previously mentioned proton gradient. | ||
| - | [[Image: 5doq_WHOLE_IMAGE.png|300 px|left|thumb|Figure 2: 6RX4 monomer subunit; alpha helices in teal, beta sheets in purple.]] | ||
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This page will be specifically focusing on the structure and overall function of the 6RX4 bd oxidase. 6RX4 is a part of the long(L) quinol-binding domain subfamily that terminal oxidases are classified into. The L-subfamily of bd oxidases are responsible for the survival of acute infectious diseases such as E.Coli and salmonella. The 6RX4's three <scene name='83/832931/Heme/4'>heme</scene> groups, its periplasmically exposed <scene name='83/832924/Q_loop/3'>Q-loop</scene>, and four protein subunits will be of primary focus when identifying the relationship between structure and function. | This page will be specifically focusing on the structure and overall function of the 6RX4 bd oxidase. 6RX4 is a part of the long(L) quinol-binding domain subfamily that terminal oxidases are classified into. The L-subfamily of bd oxidases are responsible for the survival of acute infectious diseases such as E.Coli and salmonella. The 6RX4's three <scene name='83/832931/Heme/4'>heme</scene> groups, its periplasmically exposed <scene name='83/832924/Q_loop/3'>Q-loop</scene>, and four protein subunits will be of primary focus when identifying the relationship between structure and function. | ||
Revision as of 02:07, 7 April 2020
bd Oxidase, 6RX4
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![Figure 1: Overall schematic representation of cytochrome bd; General display of the reduction of molecular oxygen into water using the quinol as a reducing substrate. [1]](/wiki/index.php/Image:Proton_graadient.jpg)
References
- ↑ 1.0 1.1 Safarian S, Rajendran C, Muller H, Preu J, Langer JD, Ovchinnikov S, Hirose T, Kusumoto T, Sakamoto J, Michel H. Structure of a bd oxidase indicates similar mechanisms for membrane-integrated oxygen reductases. Science. 2016 Apr 29;352(6285):583-6. doi: 10.1126/science.aaf2477. PMID:27126043 doi:http://dx.doi.org/10.1126/science.aaf2477
- ↑ 2.0 2.1 Ransey E, Paredes E, Dey SK, Das SR, Heroux A, Macbeth MR. Crystal structure of the Entamoeba histolytica RNA lariat debranching enzyme EhDbr1 reveals a catalytic Zn(2+) /Mn(2+) heterobinucleation. FEBS Lett. 2017 Jul;591(13):2003-2010. doi: 10.1002/1873-3468.12677. Epub 2017, Jun 14. PMID:28504306 doi:http://dx.doi.org/10.1002/1873-3468.12677
