1nu4
From Proteopedia
| Line 4: | Line 4: | ||
|PDB= 1nu4 |SIZE=350|CAPTION= <scene name='initialview01'>1nu4</scene>, resolution 1.80Å | |PDB= 1nu4 |SIZE=350|CAPTION= <scene name='initialview01'>1nu4</scene>, resolution 1.80Å | ||
|SITE= | |SITE= | ||
| - | |LIGAND= <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene> | + | |LIGAND= <scene name='pdbligand=MG:MAGNESIUM+ION'>MG</scene>, <scene name='pdbligand=MLA:MALONIC+ACID'>MLA</scene> |
|ACTIVITY= | |ACTIVITY= | ||
|GENE= | |GENE= | ||
| + | |DOMAIN= | ||
| + | |RELATEDENTRY=[[1urn|1urn]], [[1nrc|1nrc]] | ||
| + | |RESOURCES=<span class='plainlinks'>[http://oca.weizmann.ac.il/oca-docs/fgij/fg.htm?mol=1nu4 FirstGlance], [http://oca.weizmann.ac.il/oca-bin/ocaids?id=1nu4 OCA], [http://www.ebi.ac.uk/pdbsum/1nu4 PDBsum], [http://www.rcsb.org/pdb/explore.do?structureId=1nu4 RCSB]</span> | ||
}} | }} | ||
| Line 25: | Line 28: | ||
[[Category: Rupert, P B.]] | [[Category: Rupert, P B.]] | ||
[[Category: Xiao, H.]] | [[Category: Xiao, H.]] | ||
| - | [[Category: MG]] | ||
| - | [[Category: MLA]] | ||
[[Category: rna binding domain]] | [[Category: rna binding domain]] | ||
[[Category: rna recognition motif]] | [[Category: rna recognition motif]] | ||
[[Category: u1 small nuclear ribonucleoprotein]] | [[Category: u1 small nuclear ribonucleoprotein]] | ||
| - | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on | + | ''Page seeded by [http://oca.weizmann.ac.il/oca OCA ] on Sun Mar 30 22:35:32 2008'' |
Revision as of 19:35, 30 March 2008
| |||||||
| , resolution 1.80Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | , | ||||||
| Related: | 1urn, 1nrc
| ||||||
| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
U1A RNA binding domain at 1.8 angstrom resolution reveals a pre-organized C-terminal helix
Overview
The human U1A RNA-binding domain (RBD1) adopts one of the most common protein folds, the RNA-recognition motif, and is a paradigm for understanding RNA-protein interactions. A 2.8 A resolution structure of the unbound RBD1 has previously been determined [Nagai et al. (1990). Nature (London), 348, 515-520] and revealed a well defined alpha/beta core with disordered termini. Using a longer construct, a 1.8 A resolution structure of the unbound domain was determined that reveals an ordered C-terminal helix. The presence of this helix is consistent with a solution structure of the free domain [Avis et al. (1996). J. Mol. Biol. 257, 398-411]; however, in the solution structure the helix occludes the RNA-binding surface. In the present structure, the helix occupies a position similar to that seen in a 1.9 A resolution RNA-RBD1 complex structure [Oubridge et al. (1994). Nature (London), 372, 432-438]. The crystals in this study were grown from 2.2 M sodium malonate. It is possible that the high salt concentration helps to orient the C-terminal helix in the RNA-bound conformation by strengthening hydrophobic interactions between the buried face of the helix and the alpha/beta core of the protein. Alternatively, the malonate (several molecules of which are bound in the vicinity of the RNA-binding surface) may mimic RNA.
About this Structure
1NU4 is a Single protein structure of sequence from Homo sapiens. Full crystallographic information is available from OCA.
Reference
U1A RNA-binding domain at 1.8 A resolution., Rupert PB, Xiao H, Ferre-D'Amare AR, Acta Crystallogr D Biol Crystallogr. 2003 Aug;59(Pt 8):1521-4. Epub 2003, Jul 23. PMID:12876372
Page seeded by OCA on Sun Mar 30 22:35:32 2008
