Crystallization (Comment) | Organism |
---|---|
enzyme mutant K138A in complex with a peptide substrate, an enzyme dimer bound to one peptide, X-ray diffraction structure determination and analysis at 2.25 A resolution | Pyrococcus horikoshii |
Protein Variants | Comment | Organism |
---|---|---|
K138A | site-directed mutagenesis | Pyrococcus horikoshii |
Localization | Comment | Organism | GeneOntology No. | Textmining |
---|---|---|---|---|
membrane | membrane-bound enzyme | Pyrococcus horikoshii | 16020 | - |
Natural Substrates | Organism | Comment (Nat. Sub.) | Natural Products | Comment (Nat. Pro.) | Rev. | Reac. |
---|---|---|---|---|---|---|
p-stomatin PH1511p + H2O | Pyrococcus horikoshii | the N-terminal region of PH1510p is a serine protease and specifically cleaves the C-terminal hydrophobic region of the p-stomatin PH1511p | ? | - |
? |
Organism | UniProt | Comment | Textmining |
---|---|---|---|
Pyrococcus horikoshii | O59179 | - |
- |
Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
---|---|---|---|---|---|---|
additional information | peptide substrate binding structure of the enzyme, detailed analysis and overview. The six central residues, VIVLML, of the peptide are hydrophobic and in a pseudopalindromic structure and therefore favorably fit into the hydrophobic active tunnel of the enzyme dimer, although the enzyme degrades the substrate at only one point. Binding of the substrate causes a large rotational and translational displacement between protomers and produces a tunnel suitable for binding the peptide. When the peptide binds, the flexible L2 loop of one protomer forms beta-strands, whereas that of the other protomer remains in a loop form, indicating that one protomer binds to the peptide more tightly than the other protomer. The Ala138 residues of the two protomers are located very close together, close positioning of the catalytic Ser97 and Lys138 residues may be induced by electrostatic repulsion of the two Lys138 side chains of the protomers | Pyrococcus horikoshii | ? | - |
? | |
p-stomatin PH1511p + H2O | the N-terminal region of PH1510p is a serine protease and specifically cleaves the C-terminal hydrophobic region of the p-stomatin PH1511p | Pyrococcus horikoshii | ? | - |
? |
Synonyms | Comment | Organism |
---|---|---|
1510-N | - |
Pyrococcus horikoshii |
membrane stomatin-specific protease | - |
Pyrococcus horikoshii |
PH1510p | - |
Pyrococcus horikoshii |
General Information | Comment | Organism |
---|---|---|
additional information | the N-terminal region of PH1510p is a serine protease with a catalytic Ser-Lys dyad, Ser97 and Lys138 | Pyrococcus horikoshii |