| Structural highlights
1l34 is a 1 chain structure with sequence from Bpt4. Full crystallographic information is available from OCA. For a guided tour on the structure components use FirstGlance.
| | Related: | 2lzm, 1l01, 1l02, 1l03, 1l04, 1l05, 1l06, 1l07, 1l08, 1l09, 1l10, 1l11, 1l12, 1l13, 1l14, 1l15, 1l16, 1l17, 1l18, 1l19, 1l20, 1l21, 1l22, 1l23, 1l24, 1l25, 1l26, 1l27, 1l28, 1l29, 1l30, 1l31, 1l32, 1l33, 1l35, 1l36 |
| Activity: | Lysozyme, with EC number 3.2.1.17 |
| Resources: | FirstGlance, OCA, PDBe, RCSB, PDBsum |
Function
[LYS_BPT4] Helps to release the mature phage particles from the cell wall by breaking down the peptidoglycan.
Evolutionary Conservation
Check, as determined by ConSurfDB. You may read the explanation of the method and the full data available from ConSurf.
Publication Abstract from PubMed
The structure of the temperature-sensitive mutant lysozyme of bacteriophage T4 in which arginine 96 is replaced by histidine has been determined crystallographically and refined to a residual of 17.6% at 1.9-A resolution. Overall, the three-dimensional structure of the mutant protein is extremely similar to that of wild type. There are local distortions in the mutant structure suggesting that the substituted His 96 residue is under strain. This appears to be one of the major reasons for the decreased thermostability. In wild-type lysozyme the guanidinium of Arg 96 is located at the carboxy terminus of alpha-helix 82-90 and makes a pair of hydrogen bonds to two of the carbonyl groups in the last turn of the helix. The loss of this "helix dipole" interaction also appears to contribute to the destabilization. The pKa* of His 96 in the mutant lysozyme has been determined by nuclear magnetic resonance and found to be 6.8 at 10 degrees C. This relatively normal value of the histidine pKa* suggests that the protonated and unprotonated forms of the imidazole ring are perturbed equally by the protein environment or, what is equivalent, the mutant lysozyme is equally stable with either histidine species.
High-resolution structure of the temperature-sensitive mutant of phage lysozyme, Arg 96----His.,Weaver LH, Gray TM, Grutter MG, Anderson DE, Wozniak JA, Dahlquist FW, Matthews BW Biochemistry. 1989 May 2;28(9):3793-7. PMID:2665808[1]
From MEDLINE®/PubMed®, a database of the U.S. National Library of Medicine.
See Also
References
- ↑ Weaver LH, Gray TM, Grutter MG, Anderson DE, Wozniak JA, Dahlquist FW, Matthews BW. High-resolution structure of the temperature-sensitive mutant of phage lysozyme, Arg 96----His. Biochemistry. 1989 May 2;28(9):3793-7. PMID:2665808
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