This old version of Proteopedia is provided for student assignments while the new version is undergoing repairs. Content and edits done in this old version of Proteopedia after March 1, 2026 will eventually be lost when it is retired in about June of 2026.
Apply for new accounts at the new Proteopedia. Your logins will work in both the old and new versions.
1yt3
From Proteopedia
| |||||||
| , resolution 1.60Å | |||||||
|---|---|---|---|---|---|---|---|
| Ligands: | and | ||||||
| Gene: | RND (Escherichia coli) | ||||||
| Activity: | Ribonuclease III, with EC number 3.1.26.3 | ||||||
| Coordinates: | save as pdb, mmCIF, xml | ||||||
Crystal Structure of Escherichia coli RNase D, an exoribonuclease involved in structured RNA processing
Overview
RNase D (RND) is one of seven exoribonucleases identified in Escherichia coli. RNase D has homologs in many eubacteria and eukaryotes, and has been shown to contribute to the 3' maturation of several stable RNAs. Here, we report the 1.6 A resolution crystal structure of E. coli RNase D. The conserved DEDD residues of RNase D fold into an arrangement very similar to the Klenow fragment exonuclease domain. Besides the catalytic domain, RNase D also contains two structurally similar alpha-helical domains with no discernible sequence homology between them. These closely resemble the HRDC domain previously seen in RecQ-family helicases and several other proteins acting on nucleic acids. More interestingly, the DEDD catalytic domain and the two helical domains come together to form a ring-shaped structure. The ring-shaped architecture of E. coli RNase D and the HRDC domains likely play a major role in determining the substrate specificity of this exoribonuclease.
About this Structure
1YT3 is a Single protein structure of sequence from Escherichia coli. Full crystallographic information is available from OCA.
Reference
Crystal structure of Escherichia coli RNase D, an exoribonuclease involved in structured RNA processing., Zuo Y, Wang Y, Malhotra A, Structure. 2005 Jul;13(7):973-84. PMID:16004870
Page seeded by OCA on Thu Mar 20 15:27:07 2008
