1bk2: Difference between revisions
No edit summary |
No edit summary |
||
| Line 1: | Line 1: | ||
==A-SPECTRIN SH3 DOMAIN D48G MUTANT== | ==A-SPECTRIN SH3 DOMAIN D48G MUTANT== | ||
<StructureSection load='1bk2' size='340' side='right' caption='[[1bk2]], [[Resolution|resolution]] 2.01Å' scene=''> | <StructureSection load='1bk2' size='340' side='right' caption='[[1bk2]], [[Resolution|resolution]] 2.01Å' scene=''> | ||
== Structural highlights == | == Structural highlights == | ||
<table><tr><td colspan='2'>[[1bk2]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Chick Chick]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BK2 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1BK2 FirstGlance]. <br> | <table><tr><td colspan='2'>[[1bk2]] is a 1 chain structure with sequence from [http://en.wikipedia.org/wiki/Chick Chick]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1BK2 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1BK2 FirstGlance]. <br> | ||
</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=1bk2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1bk2 OCA], [http://pdbe.org/1bk2 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1bk2 RCSB], [http://www.ebi.ac.uk/pdbsum/1bk2 PDBsum]</span></td></tr> | </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=1bk2 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1bk2 OCA], [http://pdbe.org/1bk2 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1bk2 RCSB], [http://www.ebi.ac.uk/pdbsum/1bk2 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1bk2 ProSAT]</span></td></tr> | ||
</table> | </table> | ||
== Function == | == Function == | ||
| Line 26: | Line 27: | ||
</div> | </div> | ||
<div class="pdbe-citations 1bk2" style="background-color:#fffaf0;"></div> | <div class="pdbe-citations 1bk2" style="background-color:#fffaf0;"></div> | ||
== References == | == References == | ||
<references/> | <references/> | ||
Revision as of 14:05, 22 November 2017
A-SPECTRIN SH3 DOMAIN D48G MUTANTA-SPECTRIN SH3 DOMAIN D48G MUTANT
Structural highlights
Function[SPTN1_CHICK] Morphologically, spectrin-like proteins appear to be related to spectrin, showing a flexible rod-like structure. They can bind actin but seem to differ in their calmodulin-binding activity. In nonerythroid tissues, spectrins, in association with some other proteins, may play an important role in membrane organization. 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 PubMedWe have analyzed the existence of obligatory steps in the folding reaction of the alpha-spectrin SH3 domain by mutating Asp 48 (D48G), which is at position i+3 of an isolated two-residue type II' beta-turn. Calorimetry and X-ray analysis show an entropic stabilizing effect resulting from local changes at the dihedral angles of the beta-turn. Kinetic analysis of D48G shows that this beta-turn is fully formed in the transition state, while there is no evidence of its formation in an isolated fragment. Introduction of several mutations in the D48G protein reveals that the local stabilization has not significantly altered the transition state ensemble. All these results, together with previous analysis of other alpha-spectrin and src SH3 mutants, indicate that: (i) in the folding reaction there could be obligatory steps which are not necessarily part of the folding nucleus; (ii) transition state ensembles in beta-sheet proteins could be quite defined and conformationally restricted ('mechanic folding nucleus'); and (iii) transition state ensembles in some proteins could be evolutionarily conserved. Obligatory steps in protein folding and the conformational diversity of the transition state.,Martinez JC, Pisabarro MT, Serrano L Nat Struct Biol. 1998 Aug;5(8):721-9. PMID:9699637[1] From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine. References
|
| ||||||||||||||