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3ctn

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Revision as of 13:38, 7 November 2018

STRUCTURE OF CALCIUM-SATURATED CARDIAC TROPONIN C, NMR, 30 STRUCTURES

Structural highlights

3ctn is a 1 chain structure with sequence from Chick. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Gene:	CTNC(A-CYS) (CHICK)
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[TNNC1_CHICK] Troponin is the central regulatory protein of striated muscle contraction. Tn consists of three components: Tn-I which is the inhibitor of actomyosin ATPase, Tn-T which contains the binding site for tropomyosin and Tn-C. The binding of calcium to Tn-C abolishes the inhibitory action of Tn on actin filaments.

Evolutionary Conservation

Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.

Publication Abstract from PubMed

The regulation of cardiac muscle contraction must differ from that of skeletal muscles to effect different physiological and contractile properties. Cardiac troponin C (TnC), the key regulator of cardiac muscle contraction, possesses different functional and Ca2+-binding properties compared with skeletal TnC and features a Ca2+-binding site I, which is naturally inactive. The structure of cardiac TnC in the Ca2+-saturated state has been determined by nuclear magnetic resonance spectroscopy. The regulatory domain exists in a "closed" conformation even in the Ca2+-bound (the "on") state, in contrast to all predicted models and differing significantly from the calcium-induced structure observed in skeletal TnC. This structure in the Ca2+-bound state, and its subsequent interaction with troponin I (TnI), are crucial in determining the specific regulatory mechanism for cardiac muscle contraction. Further, it will allow for an understanding of the action of calcium-sensitizing drugs, which bind to cardiac TnC and are known to enhance the ability of cardiac TnC to activate cardiac muscle contraction.

Structure of cardiac muscle troponin C unexpectedly reveals a closed regulatory domain.,Sia SK, Li MX, Spyracopoulos L, Gagne SM, Liu W, Putkey JA, Sykes BD J Biol Chem. 1997 Jul 18;272(29):18216-21. PMID:9218458^[1]

From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.

References

↑ Sia SK, Li MX, Spyracopoulos L, Gagne SM, Liu W, Putkey JA, Sykes BD. Structure of cardiac muscle troponin C unexpectedly reveals a closed regulatory domain. J Biol Chem. 1997 Jul 18;272(29):18216-21. PMID:9218458

1 Structural highlights
2 Function
3 Evolutionary Conservation
4 Publication Abstract from PubMed
5 See Also
6 References

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/3ctn"

@@ Line 1: / Line 1: @@
 ==STRUCTURE OF CALCIUM-SATURATED CARDIAC TROPONIN C, NMR, 30 STRUCTURES==
 <StructureSection load='3ctn' size='340' side='right' caption='[[3ctn]], [[NMR_Ensembles_of_Models | 30 NMR models]]' scene=''>
@@ Line 5: / Line 6: @@
 </td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=CA:CALCIUM+ION'>CA</scene></td></tr>
 <tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">CTNC(A-CYS) ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=9031 CHICK])</td></tr>
-<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3ctn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3ctn OCA], [http://pdbe.org/3ctn PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3ctn RCSB], [http://www.ebi.ac.uk/pdbsum/3ctn PDBsum]</span></td></tr>
+<tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=3ctn FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=3ctn OCA], [http://pdbe.org/3ctn PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=3ctn RCSB], [http://www.ebi.ac.uk/pdbsum/3ctn PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=3ctn ProSAT]</span></td></tr>
 </table>
 == Function ==
@@ Line 13: / Line 14: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ct/3ctn_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ct/3ctn_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>

3ctn

From Proteopedia

Revision as of 13:38, 7 November 2018

STRUCTURE OF CALCIUM-SATURATED CARDIAC TROPONIN C, NMR, 30 STRUCTURES

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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