RCSB PDB - 1TBE: STRUCTURE OF TETRAUBIQUITIN SHOWS HOW MULTIUBIQUITIN CHAINS CAN BE FORMED (original) (raw)
1TBE | pdb_00001tbe
STRUCTURE OF TETRAUBIQUITIN SHOWS HOW MULTIUBIQUITIN CHAINS CAN BE FORMED
This is version 1.5 of the entry. See complete history.
Structure of tetraubiquitin shows how multiubiquitin chains can be formed.
[Cook, W.J.](/search?q=citation.rcsb%5Fauthors:Cook, W.J.), [Jeffrey, L.C.](/search?q=citation.rcsb%5Fauthors:Jeffrey, L.C.), [Kasperek, E.](/search?q=citation.rcsb%5Fauthors:Kasperek, E.), [Pickart, C.M.](/search?q=citation.rcsb%5Fauthors:Pickart, C.M.)
(1994) J Mol Biology 236: 601-609
PubMed: 8107144 Search on PubMed
PubMed Abstract:
Eukaryotic proteins are targeted for degradation by covalent ligation of multiubiquitin chains. In these multiubiquitin chains, successive ubiquitins are linked by an isopeptide bond involving the side chain of Lys48 and the carboxyl group of the C-terminus (Gly76). The crystal structure of a tetraubiquitin chain (Ub4) has been determined and refined at 2.4 A resolution. The molecule exhibits both translational and 2-fold rotational symmetry; each pair of (rotationally symmetric) ubiquitin molecules in Ub4 is related to the next pair by a simple translation. The 2-fold symmetry in each pair of ubiquitin molecules is quite different from the 2-fold symmetry observed in the previously determined structure of isolated diubiquitin. There are multiple hydrophilic contacts among the four ubiquitin molecules, but the hydrophobic surface formed in the middle of diubiquitin is not seen. The structure of the tetraubiquitin chain demonstrates how a multiubiquitin chain of any length can be formed.
Organizational Affiliation:
Department of Pathology, University of Alabama at Birmingham 35294.
Macromolecule Content
- Total Structure Weight: 17.15 kDa
- Atom Count: 1,175
- Modelled Residue Count: 148
- Deposited Residue Count: 152
- Unique protein chains: 1
Find similar proteins by:
(by identity cutoff) | 3D Structure
Experimental Data & Validation
Experimental Data
- Method: X-RAY DIFFRACTION
- Resolution: 2.40 Å
- R-Value Work: 0.184 (Depositor), 0.180 (DCC)
- R-Value Observed: 0.184 (Depositor)
Unit Cell:
| Length ( Å ) | Angle ( ˚ ) |
|---|---|
| a = 24.1 | α = 90 |
| b = 57 | β = 94.06 |
| c = 47 | γ = 90 |
Software Package:
| Software Name | Purpose |
|---|---|
| X-PLOR | model building |
| PROLSQ | refinement |
| X-PLOR | refinement |
| X-PLOR | phasing |
Revision History (Full details and data files)
- Version 1.0: 1994-01-31
Type: Initial release - Version 1.1: 2008-03-24
Changes: Version format compliance - Version 1.2: 2011-07-13
Changes: Version format compliance - Version 1.3: 2019-07-17
Changes: Data collection, Derived calculations, Other, Refinement description - Version 1.4: 2019-08-14
Changes: Data collection, Refinement description - Version 1.5: 2024-10-30
Changes: Data collection, Database references, Structure summary