4qi6: Difference between revisions
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==Cellobiose dehydrogenase from Myriococcum thermophilum, MtCDH== | ==Cellobiose dehydrogenase from Myriococcum thermophilum, MtCDH== | ||
<StructureSection load='4qi6' size='340' side='right' caption='[[4qi6]], [[Resolution|resolution]] 3.20Å' scene=''> | <StructureSection load='4qi6' size='340' side='right'caption='[[4qi6]], [[Resolution|resolution]] 3.20Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[4qi6]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_22112 Atcc 22112]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4QI6 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4QI6 FirstGlance]. <br> | <table><tr><td colspan='2'>[[4qi6]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_22112 Atcc 22112]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=4QI6 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=4QI6 FirstGlance]. <br> | ||
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</StructureSection> | </StructureSection> | ||
[[Category: Atcc 22112]] | [[Category: Atcc 22112]] | ||
[[Category: Large Structures]] | |||
[[Category: Divne, C]] | [[Category: Divne, C]] | ||
[[Category: Gandini, R]] | [[Category: Gandini, R]] | ||
Revision as of 13:16, 25 December 2019
Cellobiose dehydrogenase from Myriococcum thermophilum, MtCDHCellobiose dehydrogenase from Myriococcum thermophilum, MtCDH
Structural highlights
Publication Abstract from PubMedA new paradigm for cellulose depolymerization by fungi focuses on an oxidative mechanism involving cellobiose dehydrogenases (CDH) and copper-dependent lytic polysaccharide monooxygenases (LPMO); however, mechanistic studies have been hampered by the lack of structural information regarding CDH. CDH contains a haem-binding cytochrome (CYT) connected via a flexible linker to a flavin-dependent dehydrogenase (DH). Electrons are generated from cellobiose oxidation catalysed by DH and shuttled via CYT to LPMO. Here we present structural analyses that provide a comprehensive picture of CDH conformers, which govern the electron transfer between redox centres. Using structure-based site-directed mutagenesis, rapid kinetics analysis and molecular docking, we demonstrate that flavin-to-haem interdomain electron transfer (IET) is enabled by a haem propionate group and that rapid IET requires a closed CDH state in which the propionate is tightly enfolded by DH. Following haem reduction, CYT reduces LPMO to initiate oxygen activation at the copper centre and subsequent cellulose depolymerization. Structural basis for cellobiose dehydrogenase action during oxidative cellulose degradation.,Tan TC, Kracher D, Gandini R, Sygmund C, Kittl R, Haltrich D, Hallberg BM, Ludwig R, Divne C Nat Commun. 2015 Jul 7;6:7542. doi: 10.1038/ncomms8542. PMID:26151670[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
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