Sandbox reserved 1754
From Proteopedia
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== Publication Abstract from PubMed == | == Publication Abstract from PubMed == | ||
| - | A specific DNA complex of the 65-residue, N-terminal fragment of the yeast transcriptional activator, GAL4, has been analysed at 2.7 A resolution by X-ray crystallography. The protein binds as a <scene name='92/925552/Dimer/1'>dimer</scene> to a symmetrical 17-base-pair sequence. A small, Zn(2+)-containing domain recognizes a conserved CCG triplet at each end of the site through direct contacts with the major groove. A short coiled-coil dimerization element imposes 2-fold symmetry. A segment of extended polypeptide chain links the metal-binding module to the dimerization element and specifies the length of the site. The relatively open structure of the complex would allow another protein to bind coordinately with GAL4. | + | A specific DNA complex of the 65-residue, N-terminal fragment of the yeast transcriptional activator, GAL4, has been analysed at 2.7 A resolution by X-ray crystallography. The protein binds as a <scene name='92/925552/Dimer/1'>dimer</scene> to a symmetrical 17-base-pair sequence.Each subunit fold into three distinct modules: a compact, <scene name='92/925552/Metal_binding_domain/1'>metal binding domain</scene> (residues 8-40), an <scene name='92/925552/Extended_linker/1'>extended linker</scene> (41-49), and an <scene name='92/925552/Alpha-helical_dimerization/1'>alpha-helical dimerization</scene> element (50-64). A small, Zn(2+)-containing domain recognizes a conserved CCG triplet at each end of the site through direct contacts with the major groove. A short coiled-coil dimerization element imposes 2-fold symmetry. A segment of extended polypeptide chain links the metal-binding module to the dimerization element and specifies the length of the site. The relatively open structure of the complex would allow another protein to bind coordinately with GAL4. |
DNA recognition by GAL4: structure of a protein-DNA complex.,Marmorstein R, Carey M, Ptashne M, Harrison SC Nature. 1992 Apr 2;356(6368):408-14. PMID:1557122<ref>PMID:1557122</ref> | DNA recognition by GAL4: structure of a protein-DNA complex.,Marmorstein R, Carey M, Ptashne M, Harrison SC Nature. 1992 Apr 2;356(6368):408-14. PMID:1557122<ref>PMID:1557122</ref> | ||
Revision as of 15:41, 16 September 2022
DNA RECOGNITION BY GAL4: STRUCTURE OF A PROTEIN/DNA COMPLEX
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