ISDA: 4E68

Deposition Date 2012-03-15

Release Date 2013-03-06

Last Version Date 2023-09-13

Entry Detail

PDB ID:

4E68

Keywords:

TRANSCRIPTION/DNA

Title:

Unphosphorylated STAT3B core protein binding to dsDNA

Biological Source:

Source Organism:

Mus musculus (Taxon ID: 10090)
Synthetic (Taxon ID: 32630)

Host Organism:

Escherichia coli

Method Details:

Experimental Method:

X-RAY DIFFRACTION

Resolution:

2.59 Å

R-Value Free:

0.27

R-Value Work:

0.22

R-Value Observed:

0.22

Space Group:

I 41

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Macromolecular Entities

Structures with similar UniProt ID

Protein Blast

Polymer Type:polypeptide(L)
Molecule:Signal transducer and activator of transcription 3
Gene (Uniprot):Stat3
Chain IDs:B (auth: A)
Chain Length:596
Number of Molecules:1
Biological Source:Mus musculus

UniProt ID:P42227 Pfam ID:PF01017, PF02864, PF21354, PF00017

Polymer Type:polydeoxyribonucleotide
Molecule:DNA (5'-D(*TP*GP*CP*AP*TP*TP*TP*CP*CP*CP*GP*TP*AP*AP*AP*TP*CP*T)-3')
Chain IDs:A (auth: B)
Chain Length:18
Number of Molecules:1
Biological Source:Synthetic

Primary Citation

Observation of unphosphorylated STAT3 core protein binding to target dsDNA by PEMSA and X-ray crystallography.

Nkansah, E, Shah, R, Collie, G.W, Parkinson, G.N, Palmer, J, Rahman, K.M, Bui, T.T, Drake, A.F, Husby, J, Neidle, S, Zinzalla, G, Thurston, D.E, Wilderspin, A.F.Show

Febs Lett. 587 833 839 (2013)

PMID: 23434585 DOI: 10.1016/j.febslet.2013.01.065

Abstact

The STAT3 transcription factor plays a central role in a wide range of cancer types where it is over-expressed. Previously, phosphorylation of this protein was thought to be a prerequisite for direct binding to DNA. However, we have now shown complete binding of a purified unphosphorylated STAT3 (uSTAT3) core directly to M67 DNA, the high affinity STAT3 target DNA sequence, by a protein electrophoretic mobility shift assay (PEMSA). Binding to M67 DNA was inhibited by addition of increasing concentrations of a phosphotyrosyl peptide. X-ray crystallography demonstrates one mode of binding that is similar to that known for the STAT3 core phosphorylated at Y705.

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Primary Citation of related structures

Abstact

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