1bbo: Difference between revisions

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[[Image:1bbo.gif|left|200px]]
{{Seed}}
[[Image:1bbo.png|left|200px]]


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{{STRUCTURE_1bbo|  PDB=1bbo  |  SCENE=  }}  
{{STRUCTURE_1bbo|  PDB=1bbo  |  SCENE=  }}  


'''HIGH-RESOLUTION SOLUTION STRUCTURE OF THE DOUBLE CYS2*HIS2 ZINC FINGER FROM THE HUMAN ENHANCER BINDING PROTEIN MBP-1'''
===HIGH-RESOLUTION SOLUTION STRUCTURE OF THE DOUBLE CYS2*HIS2 ZINC FINGER FROM THE HUMAN ENHANCER BINDING PROTEIN MBP-1===




==Overview==
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The high-resolution three-dimensional structure of a synthetic 57-residue peptide comprising the double zinc finger of the human enhancer binding protein MBP-1 has been determined in solution by nuclear magnetic resonance spectroscopy on the basis of 1280 experimental restraints. A total of 30 simulated annealing structures were calculated. The backbone atomic root-mean-square distributions about the mean coordinate positions are 0.32 and 0.33 A for the N- and C-terminal fingers, respectively, and the corresponding values for all atoms, excluding disordered surface side chains, are 0.36 and 0.40 A. Each finger comprises an irregular antiparallel sheet and a helix, with the zinc tetrahedrally coordinated to two cysteines and two histidines. The overall structure is nonglobular in nature, and the angle between the long axes of the helices is 47 +/- 5 degrees. The long axis of the antiparallel sheet in the N-terminal finger is approximately parallel to that of the helix in the C-terminal finger. Comparison of this structure with the X-ray structure of the Zif-268 triple finger complexed with DNA indicates that the relative orientation of the individual zinc fingers is clearly distinct in the two cases. This difference can be attributed to the presence of a long Lys side chain in the C-terminal finger of MBP-1 at position 40, instead of a short Ala or Ser side chain at the equivalent position in Zif-268. This finding suggests that different contacts may be involved in the binding of the zinc fingers of MBP-1 and Zif-268 to DNA, consistent with the findings from methylation interference experiments that the two fingers of MBP-1 contact 10 base pairs, while the three fingers of Zif-268 contact only 9 base pairs.
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{{ABSTRACT_PUBMED_1567844}}


==About this Structure==
==About this Structure==
1BBO is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BBO OCA].  
1BBO is a [[Single protein]] structure of sequence from [http://en.wikipedia.org/wiki/Homo_sapiens Homo sapiens]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BBO OCA].  


==Reference==
==Reference==
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[[Category: Omichinski, J G.]]
[[Category: Omichinski, J G.]]
[[Category: Dna-binding protein]]
[[Category: Dna-binding protein]]
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''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 18:46:29 2008''

Revision as of 15:46, 30 June 2008

File:1bbo.png

Template:STRUCTURE 1bbo

HIGH-RESOLUTION SOLUTION STRUCTURE OF THE DOUBLE CYS2*HIS2 ZINC FINGER FROM THE HUMAN ENHANCER BINDING PROTEIN MBP-1

Template:ABSTRACT PUBMED 1567844

About this Structure

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

Reference

High-resolution solution structure of the double Cys2His2 zinc finger from the human enhancer binding protein MBP-1., Omichinski JG, Clore GM, Robien M, Sakaguchi K, Appella E, Gronenborn AM, Biochemistry. 1992 Apr 28;31(16):3907-17. PMID:1567844

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