1blq: Difference between revisions

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


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{{STRUCTURE_1blq|  PDB=1blq  |  SCENE=  }}  
{{STRUCTURE_1blq|  PDB=1blq  |  SCENE=  }}  


'''STRUCTURE AND INTERACTION SITE OF THE REGULATORY DOMAIN OF TROPONIN-C WHEN COMPLEXED WITH THE 96-148 REGION OF TROPONIN-I, NMR, 29 STRUCTURES'''
===STRUCTURE AND INTERACTION SITE OF THE REGULATORY DOMAIN OF TROPONIN-C WHEN COMPLEXED WITH THE 96-148 REGION OF TROPONIN-I, NMR, 29 STRUCTURES===




==Overview==
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The structure of the regulatory domain of chicken skeletal troponin-C (residues 1-90) when complexed with the major inhibitory region (residues 96-148) of chicken skeletal troponin-I was determined using multinuclear, multidimensional NMR spectroscopy. This complex represents the first interaction formed between the regulatory domain of troponin-C and troponin-I after calcium binding in the regulation of muscle contraction. The stoichiometry of the complex was determined to be 1:1, with a dissociation constant in the 1-40 microM range. The structure of troponin-C in the complex was calculated from 1039 NMR distance and 111 dihedral angle restraints. When compared to the structure of this domain in the calcium saturated "open" form but in the absence of troponin-I, the bound structure appears to be slightly more "closed". The troponin-I peptide-binding site was found to be in the hydrophobic pocket of calcium saturated troponin-C, using edited/filtered NMR experiments and chemical shift mapping of changes induced in the regulatory domain upon peptide binding. The troponin-I peptide (residues 96-148) was found to bind to the regulatory domain of troponin-C very similarly, but not identically, to a shorter troponin-I peptide (region 115-131) thought to represent the major interaction site of troponin-I for this domain of troponin-C.
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{{ABSTRACT_PUBMED_9730814}}


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


==Reference==
==Reference==
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[[Category: Skeletal muscle]]
[[Category: Skeletal muscle]]
[[Category: Troponin c]]
[[Category: Troponin c]]
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Fri May  2 11:40:32 2008''
 
''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Mon Jun 30 19:21:21 2008''

Revision as of 16:21, 30 June 2008

File:1blq.png

Template:STRUCTURE 1blq

STRUCTURE AND INTERACTION SITE OF THE REGULATORY DOMAIN OF TROPONIN-C WHEN COMPLEXED WITH THE 96-148 REGION OF TROPONIN-I, NMR, 29 STRUCTURES

Template:ABSTRACT PUBMED 9730814

About this Structure

1BLQ is a Single protein structure of sequence from Gallus gallus. Full experimental information is available from OCA.

Reference

Structure and interaction site of the regulatory domain of troponin-C when complexed with the 96-148 region of troponin-I., McKay RT, Pearlstone JR, Corson DC, Gagne SM, Smillie LB, Sykes BD, Biochemistry. 1998 Sep 8;37(36):12419-30. PMID:9730814

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