IPR002716
PIN domain
InterPro entry
Short name | PIN_dom |
Overlapping homologous superfamilies | |
domain relationships |
Description
PIN domains are small protein domains identified by the presence of three strictly conserved acidic residues. Apart from these three residues, there is poor sequence conservation
[2]. PIN domains are found in eukaryotes, eubacteria and archaea. In eukaryotes they are ribonucleases involved in nonsense mediated mRNA decay
[1] and in processing of 18S ribosomal RNA
[3]. In prokaryotes, they are the toxic components of toxin-antitoxin (TA) systems, their toxicity arising by virtue of their ribonuclease activity. The PIN domain TA systems are now called VapBC TAs(virulence associated proteins), where VapB is the inhibitor and VapC, the PIN-domain ribonuclease toxin
[2].
References
1.Structures of the PIN domains of SMG6 and SMG5 reveal a nuclease within the mRNA surveillance complex. Glavan F, Behm-Ansmant I, Izaurralde E, Conti E. EMBO J. 25, 5117-25, (2006). View articlePMID: 17053788
2.The PIN-domain ribonucleases and the prokaryotic VapBC toxin-antitoxin array. Arcus VL, McKenzie JL, Robson J, Cook GM. Protein Eng. Des. Sel. 24, 33-40, (2011). View articlePMID: 21036780
3.Nob1 binds the single-stranded cleavage site D at the 3'-end of 18S rRNA with its PIN domain. Lamanna AC, Karbstein K. Proc. Natl. Acad. Sci. U.S.A. 106, 14259-64, (2009). View articlePMID: 19706509
Cross References
Representative structure
5k8j: Structure of Caulobacter crescentus VapBC1 (apo form)