Crystal structure of a tyrosine phosphorylated STAT-1 dimer bound to DNA.Chen, X., Vinkemeier, U., Zhao, Y., Jeruzalmi, D., Darnell Jr., J.E., Kuriyan, J.
(1998) Cell 93: 827-839
- PubMed: 9630226
- DOI: https://doi.org/10.1016/s0092-8674(00)81443-9
- Primary Citation of Related Structures:
- PubMed Abstract:
The crystal structure of the DNA complex of a STAT-1 homodimer has been determined at 2.9 A resolution. STAT-1 utilizes a DNA-binding domain with an immunoglobulin fold, similar to that of NFkappaB and the p53 tumor suppressor protein. The STAT-1 dimer forms a contiguous C-shaped clamp around DNA that is stabilized by reciprocal and highly specific interactions between the SH2 domain of one monomer and the C-terminal segment, phosphorylated on tyrosine, of the other. The phosphotyrosine-binding site of the SH2 domain in each monomer is coupled structurally to the DNA-binding domain, suggesting a potential role for the SH2-phosphotyrosine interaction in the stabilization of DNA interacting elements.
The Rockefeller University, New York, New York 10021, USA.