Organism | UniProt | Comment | Textmining |
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Homo sapiens | - |
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Substrates | Comment Substrates | Organism | Products | Comment (Products) | Rev. | Reac. |
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additional information | determination of the extended substrate recognition profile. The consensus recognition sequence is, P2-Pro, P1-Arg, P19-Ser/Ala/Gly/Thr, P29-not acidic and P39-Arg. Residue P39-arginine in thrombin substrates lacking a P2-proline plays an important role. Upon insertion of the consensus sequence obtained in a linker region between two Escherichia coli thioredoxin molecules, mutations of P2-Pro and P39-Arg lead to an approximate 20fold and 14fold reduction, respectively in the rate of cleavage. Mutating both Pro and Arg results in a drop in cleavage of 200-400 times. No natural substrates display the obtained consensus sequence but represent sequences that show only 1-30% of the optimal cleavage rate for thrombin. Major effects on cleavage efficiency are also observed for residues as far away as 4 amino acids from the cleavage site. Insertion of an aspartic acid in position P4 results in a drop in cleavage by a factor of almost 20 times | Homo sapiens | ? | - |
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