Summary for 216L
| Entry DOI | 10.2210/pdb216l/pdb |
| Related | 2LZM 3LZM |
| Descriptor | T4 LYSOZYME (2 entities in total) |
| Functional Keywords | hydrolase(o-glycosyl) |
| Biological source | Enterobacteria phage T4 |
| Cellular location | Host cytoplasm : P00720 |
| Total number of polymer chains | 2 |
| Total formula weight | 37454.99 |
| Authors | Blaber, M.,Matthews, B.W. (deposition date: 1994-05-10, release date: 1994-07-31, Last modification date: 2024-02-14) |
| Primary citation | Blaber, M.,Zhang, X.J.,Matthews, B.W. Structural basis of amino acid alpha helix propensity. Science, 260:1637-1640, 1993 Cited by PubMed Abstract: The propensity of an amino acid to form an alpha helix in a protein was determined by multiple amino substitutions at positions 44 and 131 in T4 lysozyme. These positions are solvent-exposed sites within the alpha helices that comprise, respectively, residues 39 to 50 and 126 to 134. Except for two acidic substitutions that may be involved in salt bridges, the changes in stability at the two sites agree well. The stability values also agree with those observed for corresponding amino acid substitutions in some model peptides. Thus, helix propensity values derived from model peptides can be applicable to proteins. Among the 20 naturally occurring amino acids, proline, glycine, and alanine each have a structurally unique feature that helps to explain their low or high helix propensities. For the remaining 17 amino acids, it appears that the side chain hydrophobic surface buried against the side of the helix contributes substantially to alpha helix propensity. PubMed: 8503008PDB entries with the same primary citation |
| Experimental method | X-RAY DIFFRACTION (2.1 Å) |
Structure validation
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