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1ubq
From Proteopedia
| 1ubq, resolution 1.80Å () | |||||||||
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| Resources: | FirstGlance, OCA, PDBsum, RCSB | ||||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||||
Contents |
STRUCTURE OF UBIQUITIN REFINED AT 1.8 ANGSTROMS RESOLUTION
The crystal structure of human erythrocytic ubiquitin has been refined at 1.8 A resolution using a restrained least-squares procedure. The crystallographic R-factor for the final model is 0.176. Bond lengths and bond angles in the molecule have root-mean-square deviations from ideal values of 0.016 A and 1.5 degrees, respectively. A total of 58 water molecules per molecule of ubiquitin are included in the final model. The last four residues in the molecule appear to have partial occupancy or large thermal motion. The overall structure of ubiquitin is extremely compact and tightly hydrogen-bonded; approximately 87% of the polypeptide chain is involved in hydrogen-bonded secondary structure. Prominent secondary structural features include three and one-half turns of alpha-helix, a short piece of 3(10)-helix, a mixed beta-sheet that contains five strands, and seven reverse turns. There is a marked hydrophobic core formed between the beta-sheet and alpha-helix. The molecule features a number of unusual secondary structural features, including a parallel G1 beta-bulge, two reverse Asx turns, and a symmetrical hydrogen-bonding region that involves the two helices and two of the reverse turns.
Structure of ubiquitin refined at 1.8 A resolution., Vijay-Kumar S, Bugg CE, Cook WJ, J Mol Biol. 1987 Apr 5;194(3):531-44. PMID:3041007
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
About this Structure
1ubq is a 1 chain structure of Ubiquitin with sequence from Homo sapiens. The December 2004 RCSB PDB Molecule of the Month feature on Ubiquitin by David S. Goodsell is 10.2210/rcsb_pdb/mom_2004_12. Full crystallographic information is available from OCA.
See Also
Reference
- Vijay-Kumar S, Bugg CE, Cook WJ. Structure of ubiquitin refined at 1.8 A resolution. J Mol Biol. 1987 Apr 5;194(3):531-44. PMID:3041007
