Activating Compound | Comment | Organism | Structure |
---|---|---|---|
additional information | ssDNA-binding protein stimulates ExoI by recruiting the enzyme. ExoI/ssDNA-binding protein complex formation is necessary, but not sufficient for ssDNA-binding protein stimulation of ExoI activity | Escherichia coli |
Cloned (Comment) | Organism |
---|---|
- |
Escherichia coli |
Crystallization (Comment) | Organism |
---|---|
by hanging-drop vapor-diffusion method, unbound ExoI, to 1.7 resolution. ExoI bound to the C terminus of ssDNA-binding protein, at 2.7 A resolution. Two C terminus ssDNA-binding proteins bind to adjacent sites on ExoI | Escherichia coli |
Protein Variants | Comment | Organism |
---|---|---|
D319A | does not alter the secondary structure significantly. 2-fold binding defect to the C terminus of ssDNA-binding protein relative to wild-type ExoI | Escherichia coli |
E150A | does not alter the secondary structure significantly. 2fold enhanced binding to the C terminus of ssDNA-binding protein relative to wild-type ExoI | Escherichia coli |
E318A | does not alter the secondary structure significantly. 2fold enhanced binding to the C terminus of ssDNA-binding protein relative to wild-type ExoI | Escherichia coli |
K227A | does not alter the secondary structure significantly. Displays a 3fold binding defect to the C terminus of ssDNA-binding protein relative to wild-type ExoI | Escherichia coli |
L331A | does not alter the secondary structure significantly. Reduced binding to the C terminus of ssDNA-binding protein relative to wild-type ExoI | Escherichia coli |
Q311A | does not alter the secondary structure significantly. Displays modest 2fold binding defect to the C terminus of ssDNA-binding protein relative to wild-type ExoI | Escherichia coli |
R148A | does not alter the secondary structure significantly. Displays dramatically reduced binding to the C terminus of ssDNA-binding protein relative to wild-type ExoI | Escherichia coli |
R316A | does not alter the secondary structure significantly. Displays dramatically reduced binding to the C terminus of ssDNA-binding protein relative to wild-type ExoI | Escherichia coli |
R327A | does not alter the secondary structure significantly. Reduced binding to the C terminus of ssDNA-binding protein relative to wild-type ExoI | Escherichia coli |
R338A | does not alter the secondary structure significantly. Displays a 3fold binding defect to the C terminus of ssDNA-binding protein relative to wild-type ExoI | Escherichia coli |
Y207A | does not alter the secondary structure significantly. Displays dramatically reduced binding to the C terminus of ssDNA-binding protein relative to wild-type ExoI | Escherichia coli |
Metals/Ions | Comment | Organism | Structure |
---|---|---|---|
Mg2+ | Arg-316 rotamer position allows a nonactive site Mg2+ ion to bind to an acidic pocket formed by Glu-150, Glu-318, and Asp-319 | Escherichia coli |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
additional information | Escherichia coli | ssDNA-binding protein stimulates ExoI by recruiting the enzyme to its substrate and provides a structural paradigm for understanding ssDNA-binding protein's organizational role in genome maintenance | ? | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Escherichia coli | P04995 | - |
- |
Purification (Comment) | Organism |
---|---|
- |
Escherichia coli |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
additional information | ssDNA-binding protein stimulates ExoI by recruiting the enzyme to its substrate and provides a structural paradigm for understanding ssDNA-binding protein's organizational role in genome maintenance | Escherichia coli | ? | - |
? | |
ssDNA + H2O | - |
Escherichia coli | ? | - |
? |
Synonyms | Comment | Organism |
---|---|---|
ExoI | - |
Escherichia coli |
exonuclease I | - |
Escherichia coli |