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Background: L1 is an important primary rRNA-binding protein, as well as a translational repressor that binds mRNA. It was shown that L1 proteins from some bacteria and archaea are functionally interchangeable within the ribosome and in the repression of translation. The crystal structure of bacterial L1 from Thermus thermophilus (TthL1) has previously been determined.Results: We report here the first...
S8 is one of the core ribosomal proteins. It binds to 16 S RNA with high affinity and independently of other ribosomal proteins. It also acts as a translational repressor in Escherichia coli by binding to its own mRNA. The structure of Thermus thermophilus S8 has been determined by the method of multiple isomorphous replacement at 2.9 Å resolution and refined to a crystallographic R-factor of 16.2%...
One of the zinc ligands in human carbonic anhydrase II, His 94 , has been replaced with glutamic acid by site-directed mutagenesis. The mutation leads to a less stable zinc binding site and to significant non-local perturbations of the protein structure. The crystals are composed of a mixture of holo- and apoenzyme, and the side chain of Glu 94 has two conformations. In the...
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