2  structures 0  species 0  sequences

Motif: pK-turn (RM00012)

Description: RNase P RNA pseudoknot kink turn


Wikipedia annotation Edit Wikipedia article

The Rfam group coordinates the annotation of Rfam data in Wikipedia. This motif is described by a Wikipedia entry entitled Internal loop. More...

This page is based on a wikipedia article. The text is available under the Creative Commons Attribution/Share-Alike License.


You can either download the motif alignment or view it directly in your browser window. More...

Formatting options

You can view or download motif alignments in several formats. Check either the "download" button, to save the formatted alignment, or "view", to see it in your browser window, and click "Generate".

Alignment format:


There are 2 PDB entires which have been used to build the motif model.

The table of results below may be sorted by clicking on the column titles, or restored to the original order here.

Original order PDB ID PDB chain ID PDB Residues
2 2A2E 211 - 240
2 3Q1Q 231 - 259

Family matches

There are 11 Rfam families which match this motif.

This section shows the families which have been annotated with this motif. Users should be aware that the motifs are structural constructs and do not necessarily conform to taxonomic boundaries in the way that Rfam families do. More...

Original order Family Accession Family Description Number of Hits Fraction of Hits Sum of Bits Image
3 RF00010 Bacterial RNase P class A 306 0.668 6551.2 Match Image
3 RF00126 ryfA RNA 3 0.333 43.2 Match Image
3 RF00222 Bag-1 internal ribosome entry site (IRES) 2 0.133 29.3 Match Image
3 RF00602 Small Cajal body specific RNA 21 2 0.083 30.2 Match Image
3 RF02164 Pvt1 oncogene conserved region 1 3 0.176 43.0 Match Image
3 RF02354 Bradyrhizobiaceae sRNA BjrC80 5 0.333 73.1 Match Image
3 RF02462 Ascomycota telomerase RNA 2 0.500 30.1 Match Image
3 RF02540 Archaeal large subunit ribosomal RNA 10 0.110 199.4 Match Image
3 RF02880 Mesorhizobail RNA 15 2 1.000 36.0 Match Image
3 RF02985 ftsZ-DE RNA 6 0.600 96.3 Match Image
3 RF03018 RT-15 RNA 5 0.078 79.6 Match Image


This section shows the database cross-references that we have for this Rfam motif.

Literature references

  1. Meyer M, Westhof E, Masquida B RNA Biol. 2012;9:[Epub ahead of print]. A structural module in RNase P expands the variety of RNA kinks. PUBMED:22336704

External database links

Curation and motif details

This section shows the detailed information about the Rfam motif. We're happy to receive updated or improved alignments for new or existing families. Submit your new alignment and we'll take a look.


Seed source Published; PMID:22336704
Structure source N/A
Type Internal Loop
Author Gardner PP
Alignment details
Alignment Number of
Average length Sequence
identity (%)
seed 306 40.76 40

Model information

Build commands
cmbuild -F pK-CM pK-SEED
cmcalibrate --mpi --seed 1 pK-CM
Gathering cutoff 14.0
Covariance model Download the Infernal CM for the motif here