2ipz

From Proteopedia

(Difference between revisions)

Revision as of 11:20, 31 March 2021

A Parallel Coiled-Coil Tetramer with Offset Helices

Structural highlights

2ipz is a 4 chain structure with sequence from Atcc 18824. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
Ligands:	,
Related:	2zta, 2b1f, 2b22, 2hy6
Gene:	GCN4 (ATCC 18824)
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

Specific helix-helix interactions are fundamental in assembling the native state of proteins and in protein-protein interfaces. Coiled coils afford a unique model system for elucidating principles of molecular recognition between alpha helices. The coiled-coil fold is specified by a characteristic seven amino acid repeat containing hydrophobic residues at the first (a) and fourth (d) positions. Nonpolar side chains spaced three and four residues apart are referred to as the 3-4 hydrophobic repeat. The presence of apolar amino acids at the e or g positions (corresponding to a 3-3-1 hydrophobic repeat) can provide new possibilities for close-packing of alpha-helices that includes examples such as the lac repressor tetramerization domain. Here we demonstrate that an unprecedented coiled-coil interface results from replacement of three charged residues at the e positions in the dimeric GCN4 leucine zipper by nonpolar valine side chains. Equilibrium circular dichroism and analytical ultracentrifugation studies indicate that the valine-containing mutant forms a discrete alpha-helical tetramer with a significantly higher stability than the parent leucine-zipper molecule. The 1.35 A resolution crystal structure of the tetramer reveals a parallel four-stranded coiled coil with a three-residue interhelical offset. The local packing geometry of the three hydrophobic positions in the tetramer conformation is completely different from that seen in classical tetrameric structures yet bears resemblance to that in three-stranded coiled coils. These studies demonstrate that distinct van der Waals interactions beyond the a and d side chains can generate a diverse set of helix-helix interfaces and three-dimensional supercoil structures.

A parallel coiled-coil tetramer with offset helices.,Liu J, Deng Y, Zheng Q, Cheng CS, Kallenbach NR, Lu M Biochemistry. 2006 Dec 26;45(51):15224-31. Epub 2006 Nov 29. PMID:17176044^[1]

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

References

↑ Liu J, Deng Y, Zheng Q, Cheng CS, Kallenbach NR, Lu M. A parallel coiled-coil tetramer with offset helices. Biochemistry. 2006 Dec 26;45(51):15224-31. Epub 2006 Nov 29. PMID:17176044 doi:10.1021/bi061914m

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/2ipz"

@@ Line 1: / Line 1: @@
 ==A Parallel Coiled-Coil Tetramer with Offset Helices==
-<StructureSection load='2ipz' size='340' side='right' caption='[[2ipz]], [[Resolution|resolution]] 1.35&Aring;' scene=''>
+<StructureSection load='2ipz' size='340' side='right'caption='[[2ipz]], [[Resolution|resolution]] 1.35&Aring;' scene=''>
 == Structural highlights ==
-<table><tr><td colspan='2'>[[2ipz]] is a 4 chain structure with sequence from [http://en.wikipedia.org/wiki/Atcc_18824 Atcc 18824]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2IPZ OCA]. For a <b>guided tour on the structure components</b> use [http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=2IPZ FirstGlance]. <br>
+<table><tr><td colspan='2'>[[2ipz]] is a 4 chain structure with sequence from [https://en.wikipedia.org/wiki/Atcc_18824 Atcc 18824]. Full crystallographic information is available from [http://oca.weizmann.ac.il/oca-bin/ocashort?id=2IPZ OCA]. For a <b>guided tour on the structure components</b> use [https://proteopedia.org/fgij/fg.htm?mol=2IPZ FirstGlance]. <br>
-</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=IPA:ISOPROPYL+ALCOHOL'>IPA</scene></td></tr>
+</td></tr><tr id='ligand'><td class="sblockLbl"><b>[[Ligand|Ligands:]]</b></td><td class="sblockDat" id="ligandDat"><scene name='pdbligand=GOL:GLYCEROL'>GOL</scene>, <scene name='pdbligand=IPA:ISOPROPYL+ALCOHOL'>IPA</scene></td></tr>
-<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat">[[2zta|2zta]], [[2b1f|2b1f]], [[2b22|2b22]], [[2hy6|2hy6]]</td></tr>
+<tr id='related'><td class="sblockLbl"><b>[[Related_structure|Related:]]</b></td><td class="sblockDat"><div style='overflow: auto; max-height: 3em;'>[[2zta|2zta]], [[2b1f|2b1f]], [[2b22|2b22]], [[2hy6|2hy6]]</div></td></tr>
-<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">GCN4 ([http://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 ATCC 18824])</td></tr>
+<tr id='gene'><td class="sblockLbl"><b>[[Gene|Gene:]]</b></td><td class="sblockDat">GCN4 ([https://www.ncbi.nlm.nih.gov/Taxonomy/Browser/wwwtax.cgi?mode=Info&srchmode=5&id=4932 ATCC 18824])</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=2ipz FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ipz OCA], [http://pdbe.org/2ipz PDBe], [http://www.rcsb.org/pdb/explore.do?structureId=2ipz RCSB], [http://www.ebi.ac.uk/pdbsum/2ipz PDBsum], [http://prosat.h-its.org/prosat/prosatexe?pdbcode=2ipz ProSAT]</span></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=2ipz FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=2ipz OCA], [https://pdbe.org/2ipz PDBe], [https://www.rcsb.org/pdb/explore.do?structureId=2ipz RCSB], [https://www.ebi.ac.uk/pdbsum/2ipz PDBsum], [https://prosat.h-its.org/prosat/prosatexe?pdbcode=2ipz 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 20: / Line 20: @@
 </div>
 <div class="pdbe-citations 2ipz" style="background-color:#fffaf0;"></div>
+==See Also==
+*[[Gnc4 3D Structures|Gnc4 3D Structures]]
 == References ==
 <references/>
@@ Line 25: / Line 28: @@
 </StructureSection>
 [[Category: Atcc 18824]]
+[[Category: Large Structures]]
 [[Category: Liu, J]]
 [[Category: Lu, M]]

2ipz

From Proteopedia

Revision as of 11:20, 31 March 2021

A Parallel Coiled-Coil Tetramer with Offset Helices

Structural highlights

Function

Publication Abstract from PubMed

See Also

References

Contents

Proteopedia Page Contributors and Editors (what is this?)

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