Sandbox Reserved 198: Difference between revisions
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<Structure load='1SRN' size='450' frame='true' align='left' caption='Residues 114-124 are highlighted in the surface representations of the Wild Type, Fully Synthetic, and Semisynthetic enzymes to emphasize similarity in structure. Also, the surface representation of semisynthetic RNase A illustrates the interface between the synthetic analog and the natural enzyme ' scene='Sandbox_Reserved_198/Fully_synthetic/4' /> | |||
<Structure load='1SRN' size='450' frame='true' align='left' caption=' | |||
Residues 114-124 are highlighted in the surface representations of the Wild Type, Fully Synthetic, and Semisynthetic enzymes to emphasize similarity in structure. Also, the surface representation of semisynthetic RNase A illustrates the interface between the synthetic analog and the natural enzyme ' scene='Sandbox_Reserved_198/Fully_synthetic/4' /> | |||
=='''Structure equals Function'''== | =='''Structure equals Function'''== | ||
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''Semisynthetic RNase A'' | ''Semisynthetic RNase A'' | ||
The synthesis of semisynthetic RNasa A clearly exhibits the structure to function relationship that defines proteins. In the RNase A protein, the removal of six C terminal residues, leaving <scene name='Sandbox_Reserved_198/Rnase_1-118/1'>RNase 1-118</scene>, completely halts enzymatic activity<ref>Martin, Philip D., Marilynn S. Doscher, and Brian F. P. Edwards. "The Redefined Crystal Structure of a Fully Active Semisynthetic Ribonuclease at 1.8-A Resolution." The Journal of Biological Chemistry 262.33 (1987): 15930-5938.</ref>. However, a complex of RNase 1-118 with a synthetic polypeptide comprising the C terminal residues <scene name='Sandbox_Reserved_198/Synthetic_component/3'>111-124</scene> restores enzymatic activity to RNase A. Upon the addition of the synthetic chain, the <scene name='Sandbox_Reserved_198/Interface/7'>semisynthetic enzyme</scene> adopts a structure that closely resembles that of <scene name='Sandbox_Reserved_198/Wild_type/1'>Wild Type RNase A</scene><ref>Martin, Philip D., Marilynn S. Doscher, and Brian F. P. Edwards. "The Redefined Crystal Structure of a Fully Active Semisynthetic Ribonuclease at 1.8-A Resolution." The Journal of Biological Chemistry 262.33 (1987): 15930-5938.</ref>. The restoration of the structure reconstitutes the enzymatic activity of RNase to 98%<ref>Martin, Philip D., Marilynn S. Doscher, and Brian F. P. Edwards. "The Redefined Crystal Structure of a Fully Active Semisynthetic Ribonuclease at 1.8-A Resolution." The Journal of Biological Chemistry 262.33 (1987): 15930-5938.</ref>. | The synthesis of semisynthetic RNasa A clearly exhibits the structure to function relationship that defines proteins. In the RNase A protein, the removal of six C terminal residues, leaving <scene name='Sandbox_Reserved_198/Rnase_1-118/1'>RNase 1-118</scene>, completely halts enzymatic activity<ref>Martin, Philip D., Marilynn S. Doscher, and Brian F. P. Edwards. "The Redefined Crystal Structure of a Fully Active Semisynthetic Ribonuclease at 1.8-A Resolution." The Journal of Biological Chemistry 262.33 (1987): 15930-5938.</ref>. However, a complex of RNase 1-118 with a synthetic polypeptide comprising the C terminal residues <scene name='Sandbox_Reserved_198/Synthetic_component/3'>111-124</scene> restores enzymatic activity to RNase A. Upon the addition of the synthetic chain, the <scene name='Sandbox_Reserved_198/Interface/7'>semisynthetic enzyme</scene> <scene name='Sandbox_Reserved_198/Interface/8'>(Zoom)</scene> adopts a structure that closely resembles that of <scene name='Sandbox_Reserved_198/Wild_type/1'>Wild Type RNase A</scene><ref>Martin, Philip D., Marilynn S. Doscher, and Brian F. P. Edwards. "The Redefined Crystal Structure of a Fully Active Semisynthetic Ribonuclease at 1.8-A Resolution." The Journal of Biological Chemistry 262.33 (1987): 15930-5938.</ref>. The restoration of the structure reconstitutes the enzymatic activity of RNase to 98%<ref>Martin, Philip D., Marilynn S. Doscher, and Brian F. P. Edwards. "The Redefined Crystal Structure of a Fully Active Semisynthetic Ribonuclease at 1.8-A Resolution." The Journal of Biological Chemistry 262.33 (1987): 15930-5938.</ref>. | ||
''Fully Synthetic RNase A'' | ''Fully Synthetic RNase A'' | ||