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1ak8

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Revision as of 07:50, 21 August 2019

NMR SOLUTION STRUCTURE OF CERIUM-LOADED CALMODULIN AMINO-TERMINAL DOMAIN (CE2-TR1C), 23 STRUCTURES

Structural highlights

1ak8 is a 1 chain structure with sequence from Bovin. Full experimental information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[CALM_BOVIN] Calmodulin mediates the control of a large number of enzymes, ion channels and other proteins by Ca(2+). Among the enzymes to be stimulated by the calmodulin-Ca(2+) complex are a number of protein kinases and phosphatases. Together with CEP110 and centrin, is involved in a genetic pathway that regulates the centrosome cycle and progression through cytokinesis (By similarity).

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 solution structure of the dicerium(III) complex of the N-terminal domain of calmodulin (Ce2-TR1C hereafter) has been solved employing paramagnetic T1 relaxation enhancements and pseudocontact shifts introduced by the Ce3+ ions, together with conventional NOE constraints. The use of pseudocontact shift constraints constitutes the first attempt to locate metal ions within a protein structure by NMR. Like calcium(II), paramagnetic cerium(III) has been found to bind to the two metal binding sites of the TR1C fragment of calmodulin in a cooperative manner. Due to the presence of pseudocontact interactions between the Ce3+ ions and protons of the 76-residue protein, the 1H NMR spectra of the complex show resonances shifted between +22 and -9 ppm. Eighty percent of its proton resonances could be assigned through a standard approach using TOCSY/COSY and NOESY spectra and through 1D NOE difference spectra for the broad resonances of protons close to the paramagnetic ions. A family of structures was calculated by means of the torsion angle dynamics program DYANA [Guntert, P., Mumenthaler, C., & Wuthrich, K. (1996) XVIIthInternational Conference on Magnetic Resonance inBiological Systems (Abstract)] using 1012 NOEs. Longitudinal proton relaxation times helped to roughly define the position of the metal ions within the protein. A total of 381 pseudocontact shift constraints, whose evaluation and use are critically discussed, have then been added to further refine the metal coordinates within the protein frame and to improve the structure resolution. A dramatic resolution improvement of the metal coordinates together with a sizable resolution improvement in the regions close to the paramagnetic centers, where the number of NOEs is low, is observed. The good quality of the solution structure permitted a meaningful comparison with the solid-state structure of calcium-loaded calmodulin at 1.7 A resolution [Chattopadhyaya, R., Meador, W. E., Means, A. R., & Quiocho, F. A. (1992) J. Mol. Biol. 228, 1177]. The Ce2-TR1C complex is overall more compact than the Ca form.

Solution structure of the paramagnetic complex of the N-terminal domain of calmodulin with two Ce3+ ions by 1H NMR.,Bentrop D, Bertini I, Cremonini MA, Forsen S, Luchinat C, Malmendal A Biochemistry. 1997 Sep 30;36(39):11605-18. PMID:9305950^[1]

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

References

↑ Bentrop D, Bertini I, Cremonini MA, Forsen S, Luchinat C, Malmendal A. Solution structure of the paramagnetic complex of the N-terminal domain of calmodulin with two Ce3+ ions by 1H NMR. Biochemistry. 1997 Sep 30;36(39):11605-18. PMID:9305950 doi:10.1021/bi971022+

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/1ak8"

@@ Line 1: / Line 1: @@
 ==NMR SOLUTION STRUCTURE OF CERIUM-LOADED CALMODULIN AMINO-TERMINAL DOMAIN (CE2-TR1C), 23 STRUCTURES==
-<StructureSection load='1ak8' size='340' side='right' caption='[[1ak8]], [[NMR_Ensembles_of_Models | 23 NMR models]]' scene=''>
+<StructureSection load='1ak8' size='340' side='right'caption='[[1ak8]], [[NMR_Ensembles_of_Models | 23 NMR models]]' scene=''>
 == Structural highlights ==
 <table><tr><td colspan='2'>[[1ak8]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Bovin Bovin]. Full experimental information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1AK8 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1AK8 FirstGlance]. <br>
@@ Line 13: / Line 13: @@
 Check<jmol>
   <jmolCheckbox>
-    <scriptWhenChecked>select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ak/1ak8_consurf.spt"</scriptWhenChecked>
+    <scriptWhenChecked>; select protein; define ~consurf_to_do selected; consurf_initial_scene = true; script "/wiki/ConSurf/ak/1ak8_consurf.spt"</scriptWhenChecked>
     <scriptWhenUnchecked>script /wiki/extensions/Proteopedia/spt/initialview01.spt</scriptWhenUnchecked>
     <text>to colour the structure by Evolutionary Conservation</text>
@@ Line 28: / Line 28: @@
 </div>
 <div class="pdbe-citations 1ak8" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Calmodulin 3D structures|Calmodulin 3D structures]]
 == References ==
 <references/>
@@ Line 33: / Line 36: @@
 </StructureSection>
 [[Category: Bovin]]
+[[Category: Large Structures]]
 [[Category: Bentrop, D]]
 [[Category: Bertini, I]]

1ak8

From Proteopedia

Revision as of 07:50, 21 August 2019

NMR SOLUTION STRUCTURE OF CERIUM-LOADED CALMODULIN AMINO-TERMINAL DOMAIN (CE2-TR1C), 23 STRUCTURES

Structural highlights

Function

Evolutionary Conservation

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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