PROSITE documentation PDOC51742
PPC domain profile


The Plants and Prokaryotes Conserved (PPC) domain contains a hydrophobic region in the C terminal, and in the case of plants, is often found in several proteins with the AT-hook motif. Proteins with PPC domains are found in Bacteria, Archaea and the plant kingdom [1,2].

The PPC domain has a single α-helix packed against an antiparallel β-sheet, which is formed by five β-strands (see <PDB:2DT4>) [2]:

Some proteins known to contain a PPC domain are listed below:

  • Plant AT-hook motif nuclear localized protein 1 (AHL1), a matrix-attachment region (MAR) binding protein involved in positioning chromatin fibers in the nucleus by an AT-hook motif and PPC.
  • Pyrococcus horikoshii putative uncharacterized protein PH0802.
  • Cyanobacteria bifunctional protein GlmU.

The profile we developed covers the entire PPC domain.

Last update:

December 2014 / First entry.


Technical section

PROSITE method (with tools and information) covered by this documentation:

PPC, PS51742; PPC domain profile profile  (MATRIX)


1AuthorsFujimoto S. Matsunaga S. Yonemura M. Uchiyama S. Azuma T. Fukui K.
TitleIdentification of a novel plant MAR DNA binding protein localized on chromosomal surfaces.
SourcePlant Mol. Biol. 56:225-239(2004).
PubMed ID15604740

2AuthorsLin L. Nakano H. Nakamura S. Uchiyama S. Fujimoto S. Matsunaga S. Kobayashi Y. Ohkubo T. Fukui K.
TitleCrystal structure of Pyrococcus horikoshii PPC protein at 1.60 A resolution.
SourceProteins 67:505-507(2007).
PubMed ID17295322

PROSITE is copyrighted by the SIB Swiss Institute of Bioinformatics and distributed under the Creative Commons Attribution-NonCommercial-NoDerivatives (CC BY-NC-ND 4.0) License, see prosite_license.html.


View entry in original PROSITE document format
View entry in raw text format (no links)