1SKN image
Deposition Date 1998-03-30
Release Date 1998-06-24
Last Version Date 2024-02-14
Entry Detail
PDB ID:
1SKN
Keywords:
TRANSCRIPTION/DNA
Title:
THE BINDING DOMAIN OF SKN-1 IN COMPLEX WITH DNA: A NEW DNA-BINDING MOTIF
Biological Source:
Source Organism:
Caenorhabditis elegans (Taxon ID: 6239)
Host Organism:
Escherichia coli BL21(DE3)
Method Details:
Experimental Method:
X-RAY DIFFRACTION
Resolution:
2.50 Å
R-Value Free:
0.33
R-Value Work:
0.22
R-Value Observed:
0.24
Space Group:
C 2 2 21
1SKN validation report
Macromolecular Entities
Protein Blast
Polymer Type:polypeptide(L)
Molecule:DNA-BINDING DOMAIN OF SKN-1
Gene (Uniprot):skn-1
Chain IDs:C (auth: P)
Chain Length:92
Number of Molecules:1
Biological Source:Caenorhabditis elegans
UniProt ID:P34707 Pfam ID:PF03131
Ligand Molecules
LDA
Primary Citation
A new DNA-binding motif in the Skn-1 binding domain-DNA complex.
Nat.Struct.Biol. 5 484 491 (1998)
PMID: 9628487 DOI: 10.1038/nsb0698-484

Abstact

The DNA-binding domain of Skn-1, a developmental transcription factor that specifies mesoderm in C. elegans, is shown by X-ray crystallography to have a novel fold in which a compact, monomeric, four-helix unit organizes two DNA-contact elements. At the C-terminus, a helix extends from the domain to occupy the major groove of DNA in a manner similar to bZip proteins. Skn-1, however, lacks the leucine zipper found in all bZips. Additional contacts with the DNA are made by a short basic segment at the N-terminus of the domain, reminiscent of the 'homeodomain arm'.

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Disease

Primary Citation of related structures
1SKN