1r9p

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{{STRUCTURE_1r9p| PDB=1r9p | SCENE= }}
{{STRUCTURE_1r9p| PDB=1r9p | SCENE= }}
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'''Solution NMR Structure Of The Haemophilus Influenzae Iron-Sulfur Cluster Assembly Protein U (IscU) with Zinc Bound at the Active Site. Northeast Structural Genomics Consortium Target IR24.'''
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===Solution NMR Structure Of The Haemophilus Influenzae Iron-Sulfur Cluster Assembly Protein U (IscU) with Zinc Bound at the Active Site. Northeast Structural Genomics Consortium Target IR24.===
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==Overview==
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IscU is a highly conserved protein that serves as the scaffold for IscS-mediated assembly of iron-sulfur ([Fe-S]) clusters. We report the NMR solution structure of monomeric Haemophilus influenzae IscU with zinc bound at the [Fe-S] cluster assembly site. The compact core of the globular structure has an alpha-beta sandwich architecture with a three-stranded antiparallel beta-sheet and four alpha-helices. A nascent helix is located N-terminal to the core structure. The zinc is ligated by three cysteine residues and one histidine residue that are located in and near conformationally dynamic loops at one end of the IscU structure. Removal of the zinc metal by chelation results in widespread loss of structure in the apo form. The zinc-bound IscU may be a good model for iron-loaded IscU and may demonstrate structural features found in the [Fe-S] cluster bound form. Structural and functional similarities, genomic context in operons containing other homologous genes, and distributions of conserved surface residues support the hypothesis that IscU protein domains are homologous (i.e. derived from a common ancestor) with the SufE/YgdK family of [Fe-S] cluster assembly proteins.
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{{ABSTRACT_PUBMED_15522305}}
==About this Structure==
==About this Structure==
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1R9P is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Haemophilus_influenzae Haemophilus influenzae]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1R9P OCA].
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1R9P is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Haemophilus_influenzae Haemophilus influenzae]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1R9P OCA].
==Reference==
==Reference==
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[[Category: Three conserved cy]]
[[Category: Three conserved cy]]
[[Category: Zinc binding]]
[[Category: Zinc binding]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sat May 3 07:14:51 2008''
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Tue Jul 29 09:52:47 2008''

Revision as of 06:52, 29 July 2008

Image:1r9p.png

Template:STRUCTURE 1r9p

Solution NMR Structure Of The Haemophilus Influenzae Iron-Sulfur Cluster Assembly Protein U (IscU) with Zinc Bound at the Active Site. Northeast Structural Genomics Consortium Target IR24.

Template:ABSTRACT PUBMED 15522305

About this Structure

1R9P is a Single protein structure of sequence from Haemophilus influenzae. Full experimental information is available from OCA.

Reference

Solution NMR structure of the iron-sulfur cluster assembly protein U (IscU) with zinc bound at the active site., Ramelot TA, Cort JR, Goldsmith-Fischman S, Kornhaber GJ, Xiao R, Shastry R, Acton TB, Honig B, Montelione GT, Kennedy MA, J Mol Biol. 2004 Nov 19;344(2):567-83. PMID:15522305

Page seeded by OCA on Tue Jul 29 09:52:47 2008

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