Multiple alanine replacements within alpha-helix 126-134 of T4 lysozyme have independent, additive effects on both structure and stability.Zhang, X.J., Baase, W.A., Matthews, B.W.
(1992) Protein Sci. 1: 761-776
- PubMed: 1304917
- DOI: 10.1002/pro.5560010608
- Primary Citation of Related Structures:
- PubMed Abstract:
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(1989) Biochemistry 28: 3793
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Pjura, P.E.,Matsumura, M.,Wozniak, J.A.,Matthews, B.W.
(1990) Biochemistry 29: 2592
- Structural Studies of Mutants of the Lysozyme of Bacteriophage T4. The Temperature-Sensitive Mutant Protein Thr157 (Right Arrow) Ile
Gruetter, M.G.,Gray, T.M.,Weaver, L.H.,Alber, T.,Wilson, K.,Matthews, B.W.
(1987) J.Mol.Biol. 197: 315
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Alber, T.,Dao-Pin, S.,Nye, J.A.,Muchmore, D.C.,Matthews, B.W.
(1987) Biochemistry 26: 3754
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Nicholson, H.,Becktel, W.J.,Matthews, B.W.
(1988) Nature 336: 651
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Nicholson, H.,Soderlind, E.,Tronrud, D.E.,Matthews, B.W.
(1989) J.Mol.Biol. 210: 181
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Matsumura, M.,Becktel, W.J.,Matthews, B.W.
(1988) Nature 334: 406
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Matthews, B.W.,Remington, S.J.,Gruetter, M.G.,Anderson, W.F.
(1981) J.Mol.Biol. 147: 545
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(1991) J.Mol.Biol. 221: 873
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Nicholson, H.,Anderson, D.E.,Dao-Pin, S.,Matthews, B.W.
(1991) Biochemistry 30: 9816
- Structural Analysis of the Temperature-Sensitive Mutant of Bacteriophage T4 Lysozyme, Glycine 156 (Right Arrow) Aspartic Acid
Gray, T.M.,Matthews, B.W.
(1987) J.Biol.Chem. 262: 16858
- Contributions of Hydrogen Bonds of Thr 157 to the Thermodynamic Stability of Phage T4 Lysozyme
Alber, T.,Dao-Pin, S.,Wilson, K.,Wozniak, J.A.,Cook, S.P.,Matthews, B.W.
(1987) Nature 330: 41
- Contributions of Engineered Surface Salt Bridges to the Stability of T4 Lysozyme Determined by Directed Mutagenesis
Dao-Pin, S.,Sauer, U.,Nicholson, H.,Matthews, B.W.
(1991) Biochemistry 30: 7142
- Common Precursor of Lysozymes of Hen Egg-White and Bacteriophage T4
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(1981) Nature 290: 334
- Tolerance of T4 Lysozyme to Proline Substitutions within the Long Interdomain Alpha-Helix Illustrates the Adaptability of Proteins to Potentially Destabilizing Lesions
Sauer, U.H.,Dao-Pin, S.,Matthews, B.W.
() TO BE PUBLISHED --: --
- The Structural and Thermodynamic Consequences of Burying a Charged Residue within the Hydrophobic Core of T4 Lysozyme
Daopin, S.,Anderson, E.,Baase, W.,Dahlquist, F.W.,Matthews, B.W.
() TO BE PUBLISHED --: --
- Crystallographic Determination of the Mode of Binding of Oligosaccharides to T4 Bacteriophage Lysozyme. Implications for the Mechanism of Catalysis
Anderson, W.F.,Gruetter, M.G.,Remington, S.J.,Weaver, L.H.,Matthews, B.W.
(1981) J.Mol.Biol. 147: 523
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Matsumura, M.,Wozniak, J.A.,Dao-Pin, S.,Matthews, B.W.
(1989) J.Biol.Chem. 264: 16059
- Tolerance of T4 Lysozyme to Multiple Xaa (Right Arrow) Ala Substitutions: A Polyalanine Alpha-Helix Containing Ten Consecutive Alanines
Heinz, D.W.,Baase, W.A.,Matthews, B.W.
() TO BE PUBLISHED --: --
- Structure of Bacteriophage T4 Lysozyme Refined at 1.7 Angstroms Resolution
Weaver, L.H.,Matthews, B.W.
(1987) J.Mol.Biol. 193: 189
- Nicholson, H.,Becktel, W.,Matthews, B.W.
() TO BE PUBLISHED --: --
- Enhanced Protein Thermostability from Site-Directed Mutations that Decrease the Entropy of Unfolding
Matthews, B.W.,Nicholson, H.,Becktel, W.J.
(1987) Proc.Natl.Acad.Sci.USA 84: 6663
- Replacements of Pro86 in Phage T4 Lysozyme Extend an Alpha-Helix But Do not Alter Protein Stability
Alber, T.,Bell, J.A.,Dao-Pin, S.,Nicholson, H.,Cook, J.A.Wozniak S.,Matthews, B.W.
(1988) Science 239: 631
- Structure of the Lysozyme from Bacteriophage T4, an Electron Density Map at 2.4 Angstroms Resolution
Remington, S.J.,Anderson, W.F.,Owen, J.,Teneyck, L.F.,Grainger, C.T.,Matthews, B.W.
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(1991) J.Mol.Biol. 221: 647
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Remington, S.J.,Teneyck, L.F.,Matthews, B.W.
(1977) Biochem.Biophys.Res.Commun. 75: 265
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Matthews, B.W.,Remington, S.J.
(1974) Proc.Natl.Acad.Sci.USA 71: 4178
- Toward a Simplification of the Protein Folding Problem: A Stabilizing Polyalanine Alpha-Helix Engineered in T4 Lysozyme
Zhang, X.-J.,Baase, W.A.,Matthews, B.W.
(1991) Biochemistry 30: 2012
In a systematic attempt to identify residues important in the folding and stability of T4 lysozyme, five amino acids within alpha-helix 126-134 were substituted by alanine, either singly or in selected combinations. Together with three alanines alrea ...
In a systematic attempt to identify residues important in the folding and stability of T4 lysozyme, five amino acids within alpha-helix 126-134 were substituted by alanine, either singly or in selected combinations. Together with three alanines already present in the wild-type structure this provided a set of mutant proteins with up to eight alanines in sequence. All the variants behaved normally, suggesting that the majority of residues in the alpha-helix are nonessential for the folding of T4 lysozyme. Of the five individual alanine substitutions it is inferred that four result in slightly increased protein stability and one, the replacement of a buried leucine with alanine, substantially decreased stability. The results support the idea that alanine is a residue of high helix propensity. The change in protein stability observed for each of the multiple mutants is approximately equal to the sum of the energies associated with each of the constituent substitutions. All of the variants could be crystallized isomorphously with wild-type lysozyme, and, with one trivial exception, their structures were determined at high resolution. Substitution of the largely solvent-exposed residues Asp 127, Glu 128, and Val 131 with alanine caused essentially no change in structure except at the immediate site of replacement. Substitutions of the partially buried Asn 132 and the buried Leu 133 with alanine were associated with modest (< or = 0.4 A) structural adjustments. The structural changes seen in the multiple mutants were essentially a combination of those seen in the constituent single replacements. The different replacements therefore act essentially independently not only so far as changes in energy are concerned but also in their effect on structure. The destabilizing replacement Leu 133-->Ala made alpha-helix 126-134 somewhat less regular. Incorporation of additional alanine replacements tended to make the helix more uniform. For the penta-alanine variant a distinct change occurred in a crystal-packing contact, and the "hinge-bending angle" between the amino- and carboxy-terminal domains changed by 3.6 degrees. This tends to confirm that such hinge-bending in T4 lysozyme is a low-energy conformational change.
Institute of Molecular Biology, Howard Hughes Medical Institute, University of Oregon, Eugene 97403.