Barnase

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Function

Barnase (BA, BActerial RiboNucleASE) is a bacterial ribonuclease synthesized and secreted by the bacterium Bacillus amyloliquefaciens. [1] The inhibitor barstar (BST) binds to it very tightly and prevents it from digestion of the cell’s RNA.

Relevance

BA structure was used extensively for studying protein folding.

Structural highlights

BA hydrolyzes RNA at GpN sites where the (Lys and Arg are in magenta).

3D Structures of Barnase

Barnase 3D structures


Barnase complex with tetranucleotide (PDB code 1brn)

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ReferencesReferences

  1. Buckle AM, Fersht AR. Subsite binding in an RNase: structure of a barnase-tetranucleotide complex at 1.76-A resolution. Biochemistry. 1994 Feb 22;33(7):1644-53. PMID:8110767

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