1sg0

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{{STRUCTURE_1sg0| PDB=1sg0 | SCENE= }}
{{STRUCTURE_1sg0| PDB=1sg0 | SCENE= }}
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'''Crystal structure analysis of QR2 in complex with resveratrol'''
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===Crystal structure analysis of QR2 in complex with resveratrol===
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==Overview==
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Resveratrol has been shown to have chemopreventive, cardioprotective, and antiaging properties. Here, we report that resveratrol is a potent inhibitor of quinone reductase 2 (QR2) activity in vitro with a dissociation constant of 35 nM and show that it specifically binds to the deep active-site cleft of QR2 using high-resolution structural analysis. All three resveratrol hydroxyl groups form hydrogen bonds with amino acids from QR2, anchoring a flat resveratrol molecule in parallel with the isoalloxazine ring of FAD. The unique active-site pocket in QR2 could potentially bind other natural polyphenols such as flavonoids, as proven by the high affinity exhibited by quercetin toward QR2. K562 cells with QR2 expression suppressed by RNAi showed similar properties as resveratrol-treated cells in their resistance to quinone toxicity. Furthermore, the QR2 knockdown K562 cells exhibit increased antioxidant and detoxification enzyme expression and reduced proliferation rates. These observations could imply that the chemopreventive and cardioprotective properties of resveratrol are possibly the results of QR2 activity inhibition, which in turn, up-regulates the expression of cellular antioxidant enzymes and cellular resistance to oxidative stress.
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(as it appears on PubMed at http://www.pubmed.gov), where 15350128 is the PubMed ID number.
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{{ABSTRACT_PUBMED_15350128}}
==About this Structure==
==About this Structure==
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[[Category: Quinone reductase 2]]
[[Category: Quinone reductase 2]]
[[Category: Resveratrol]]
[[Category: Resveratrol]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 08:39:18 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jul 28 01:00:31 2008''

Revision as of 22:00, 27 July 2008

Image:1sg0.png

Template:STRUCTURE 1sg0

Crystal structure analysis of QR2 in complex with resveratrol

Template:ABSTRACT PUBMED 15350128

About this Structure

1SG0 is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.

Reference

Crystal structure of quinone reductase 2 in complex with resveratrol., Buryanovskyy L, Fu Y, Boyd M, Ma Y, Hsieh TC, Wu JM, Zhang Z, Biochemistry. 2004 Sep 14;43(36):11417-26. PMID:15350128

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