Primary Citation of Related Structures: 1QDR, 1QDT
PubMed Abstract:
The Escherichia coli lytic transglycosylase Slt35 contains a single metal ion-binding site that resembles EF-hand calcium-binding sites. The Slt35 EF-hand is only the second observation of such a domain in a prokaryotic protein. Two crystal structures at 2 ...
The Escherichia coli lytic transglycosylase Slt35 contains a single metal ion-binding site that resembles EF-hand calcium-binding sites. The Slt35 EF-hand is only the second observation of such a domain in a prokaryotic protein. Two crystal structures at 2.1 A resolution show that both Ca2+ ions and Na+ ions can bind to the EF-hand domain, but in subtly different configurations. Heat-induced unfolding studies demonstrate that Ca2+ ions are preferentially bound, and that only Ca2+ ions significantly increase the melting temperature of Slt35. This shows that the EF-hand calcium-binding domain is important for the stability of Slt35.
Related Citations:
Crystal structure of Escherichia coli lytic transglycosylase Slt35 reveals a lysozyme-like catalytic domain with an EF-hand van Asselt, E.J., Dijkstra, A.J., Kalk, K.H., Takacs, B., Keck, W., Dijkstra, B.W. (1999) To be published --: --
Accelerated X-ray structure elucidation of a 36 kDa muramidase/ transglycosylase using wARP van Asselt, E.J., Perrakis, A., Kalk, K.H., Lamzin, V.S., Dijkstra, B.W. (1998) Acta Crystallogr D Biol Crystallogr 54: 58
Organizational Affiliation:
BIOSON Research Institute and Laboratory of Biophysical Chemistry, University of Groningen, The Netherlands.
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