2d3w: Difference between revisions
New page: left|200px<br /><applet load="2d3w" size="450" color="white" frame="true" align="right" spinBox="true" caption="2d3w, resolution 2.5Å" /> '''Crystal Structure of ... |
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[[Image:2d3w.gif|left|200px]]<br /><applet load="2d3w" size=" | [[Image:2d3w.gif|left|200px]]<br /><applet load="2d3w" size="350" color="white" frame="true" align="right" spinBox="true" | ||
caption="2d3w, resolution 2.5Å" /> | caption="2d3w, resolution 2.5Å" /> | ||
'''Crystal Structure of Escherichia coli SufC, an ATPase compenent of the SUF iron-sulfur cluster assembly machinery'''<br /> | '''Crystal Structure of Escherichia coli SufC, an ATPase compenent of the SUF iron-sulfur cluster assembly machinery'''<br /> | ||
==Overview== | ==Overview== | ||
SufC is an ATPase component of the SUF machinery, which is involved in the | SufC is an ATPase component of the SUF machinery, which is involved in the biosynthesis of Fe-S clusters. To gain insight into the function of this protein, we have determined the crystal structure of Escherichia coli SufC at 2.5A resolution. Despite the similarity of the overall structure with ABC-ATPases (nucleotide-binding domains of ABC transporters), some key differences were observed. Glu171, an invariant residue involved in ATP hydrolysis, is rotated away from the nucleotide-binding pocket to form a SufC-specific salt bridge with Lys152. Due to this salt bridge, D-loop that follows Glu171 is flipped out to the molecular surface, which may sterically inhibit the formation of an active dimer. Thus, the salt bridge may play a critical role in regulating ATPase activity and preventing wasteful ATP hydrolysis. Furthermore, SufC has a unique Q-loop structure on its surface, which may form a binding site for its partner proteins, SufB and/or SufD. | ||
==About this Structure== | ==About this Structure== | ||
2D3W is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http:// | 2D3W is a [http://en.wikipedia.org/wiki/Single_protein Single protein] structure of sequence from [http://en.wikipedia.org/wiki/Escherichia_coli Escherichia coli]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2D3W OCA]. | ||
==Reference== | ==Reference== | ||
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[[Category: sufc]] | [[Category: sufc]] | ||
''Page seeded by [http:// | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Thu Feb 21 16:55:07 2008'' | ||
Revision as of 14:55, 21 February 2008
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Crystal Structure of Escherichia coli SufC, an ATPase compenent of the SUF iron-sulfur cluster assembly machinery
Overview
SufC is an ATPase component of the SUF machinery, which is involved in the biosynthesis of Fe-S clusters. To gain insight into the function of this protein, we have determined the crystal structure of Escherichia coli SufC at 2.5A resolution. Despite the similarity of the overall structure with ABC-ATPases (nucleotide-binding domains of ABC transporters), some key differences were observed. Glu171, an invariant residue involved in ATP hydrolysis, is rotated away from the nucleotide-binding pocket to form a SufC-specific salt bridge with Lys152. Due to this salt bridge, D-loop that follows Glu171 is flipped out to the molecular surface, which may sterically inhibit the formation of an active dimer. Thus, the salt bridge may play a critical role in regulating ATPase activity and preventing wasteful ATP hydrolysis. Furthermore, SufC has a unique Q-loop structure on its surface, which may form a binding site for its partner proteins, SufB and/or SufD.
About this Structure
2D3W is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.
Reference
Crystal structure of Escherichia coli SufC, an ABC-type ATPase component of the SUF iron-sulfur cluster assembly machinery., Kitaoka S, Wada K, Hasegawa Y, Minami Y, Fukuyama K, Takahashi Y, FEBS Lett. 2006 Jan 9;580(1):137-43. Epub 2005 Dec 6. PMID:16364320
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