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1ce9

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Revision as of 15:15, 3 March 2021

HELIX CAPPING IN THE GCN4 LEUCINE ZIPPER

Structural highlights

1ce9 is a 4 chain structure. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Resources:	FirstGlance, OCA, PDBe, RCSB, PDBsum, ProSAT

Function

[GCN4_YEAST] Is a transcription factor that is responsible for the activation of more than 30 genes required for amino acid or for purine biosynthesis in response to amino acid or purine starvation. Binds and recognize the DNA sequence: 5'-TGA[CG]TCA-3'.

Publication Abstract from PubMed

Capping interactions associated with specific sequences at or near the ends of alpha-helices are important determinants of the stability of protein secondary and tertiary structure. We investigate here the role of the helix-capping motif Ser-X-X-Glu, a sequence that occurs frequently at the N termini of alpha helices in proteins, on the conformation and stability of the GCN4 leucine zipper. The 1.8 A resolution crystal structure of the capped molecule reveals distinct conformations, packing geometries and hydrogen-bonding networks at the amino terminus of the two helices in the leucine zipper dimer. The free energy of helix stabilization associated with the hydrogen-bonding and hydrophobic interactions in this capping structure is -1.2 kcal/mol, evaluated from thermal unfolding experiments. A single cap thus contributes appreciably to stabilizing the terminated helix and thereby the native state. These results suggest that helix capping plays a further role in protein folding, providing a sensitive connector linking alpha-helix formation to the developing tertiary structure of a protein.

Helix capping in the GCN4 leucine zipper.,Lu M, Shu W, Ji H, Spek E, Wang L, Kallenbach NR J Mol Biol. 1999 May 14;288(4):743-52. PMID:10329176^[1]

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

References

↑ Lu M, Shu W, Ji H, Spek E, Wang L, Kallenbach NR. Helix capping in the GCN4 leucine zipper. J Mol Biol. 1999 May 14;288(4):743-52. PMID:10329176 doi:http://dx.doi.org/S0022-2836(99)92707-9

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

Proteopedia Page Contributors and Editors (what is this?)

OCA

Retrieved from "http://52.214.119.220/wiki/index.php/1ce9"

@@ Line 3: / Line 3: @@
 <StructureSection load='1ce9' size='340' side='right'caption='[[1ce9]], [[Resolution|resolution]] 1.80&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[1ce9]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CE9 OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1CE9 FirstGlance]. <br>
+<table><tr><td colspan='2'>[[1ce9]] is a 4 chain structure. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=1CE9 OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=1CE9 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=1ce9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ce9 OCA], [http://pdbe.org/1ce9 PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=1ce9 RCSB], [http://www.ebi.ac.uk/pdbsum/1ce9 PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=1ce9 ProSAT]</span></td></tr>
+</td></tr><tr id='resources'><td class="sblockLbl"><b>Resources:</b></td><td class="sblockDat"><span class='plainlinks'>[https://proteopedia.org/fgij/fg.htm?mol=1ce9 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1ce9 OCA], [https://pdbe.org/1ce9 PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=1ce9 RCSB], [https://www.ebi.ac.uk/pdbsum/1ce9 PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=1ce9 ProSAT]</span></td></tr>
 </table>
 == Function ==
-[[http://www.uniprot.org/uniprot/GCN4_YEAST GCN4_YEAST]] Is a transcription factor that is responsible for the activation of more than 30 genes required for amino acid or for purine biosynthesis in response to amino acid or purine starvation. Binds and recognize the DNA sequence: 5'-TGA[CG]TCA-3'.
+[[https://www.uniprot.org/uniprot/GCN4_YEAST GCN4_YEAST]] Is a transcription factor that is responsible for the activation of more than 30 genes required for amino acid or for purine biosynthesis in response to amino acid or purine starvation. Binds and recognize the DNA sequence: 5'-TGA[CG]TCA-3'.
 <div style="background-color:#fffaf0;">
 == Publication Abstract from PubMed ==
@@ Line 19: / Line 19: @@
 ==See Also==
-*[[Gcn4|Gcn4]]
+*[[Gnc4 3D Structures|Gnc4 3D Structures]]
 == References ==
 <references/>

1ce9

From Proteopedia

Revision as of 15:15, 3 March 2021

HELIX CAPPING IN THE GCN4 LEUCINE ZIPPER

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

Views

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