3NZM image
Entry Detail
PDB ID:
3NZM
Keywords:
TRANSFERASE
Title:
Crystal structure of DNAE intein with N-extein in redox trap
Biological Source:
Source Organism:
Synechocystis sp. PCC 6803
Host Organism:
Escherichia coli
PDB Version:
Deposition Date:
2010-07-16
Release Date:
2011-06-01
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
1.55 Å
R-Value Free:
0.26
R-Value Work:
0.22
R-Value Observed:
0.22
Space Group:
P 21 21 21
3NZM validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Description:DNA polymerase III subunit alpha
Mutations:A-3C,G-2P,Y-1G
Chain IDs:A
Chain Length:168
Number of Molecules:1
Biological Source:Synechocystis sp. PCC 6803
UniProt ID:P74750
Modified Residue
Compound ID Chain ID Parent Comp ID Details 2D Image
SNN A ASN L-3-AMINOSUCCINIMIDE
Ligand Molecules
SO4
Primary Citation
Structure of catalytically competent intein caught in a redox trap with functional and evolutionary implications.
Nat.Struct.Mol.Biol. 18 630 633 (2011)
PMID: 21460844 DOI: 10.1038/nsmb.2041

Abstact

Here we describe self-splicing proteins, called inteins, that function as redox-responsive switches in bacteria. Redox regulation was achieved by engineering a disulfide bond between the intein's catalytic cysteine and a cysteine in the flanking 'extein' sequence. This interaction was validated by an X-ray structure, which includes a transient splice junction. A natural analog of the designed system was identified in Pyrococcus abyssi, suggesting an unprecedented form of adaptive, post-translational regulation.

Legend

Protein

Chemical

Disease

Primary Citation of related structures
1ZDE
1ZD7