Description

IPR023779 is a Chromo domain, conserved site.

<p>The CHROMO (CHRromatin Organization MOdifier) domain [[cite:PUB00005519], [cite:PUB00004399], [cite:PUB00004460], [cite:PUB00004461]] is a conserved region of around 60 amino acids, originally identified in Drosophila modifiers of variegation. These are proteins that alter the structure of chromatin to the condensed morphology of heterochromatin, a cytologically visible condition where gene expression is repressed. In one of these proteins, Polycomb, the chromo domain has been shown to be important for chromatin targeting.</p> <p>Proteins that contain a chromo domain appear to fall into 3 classes. The first class includes proteins having an N-terminal chromo domain followed by a region termed the chromo shadow domain, with weak but significant sequence similarity to the N-terminal chromo domain [[cite:PUB00004460]], eg. Drosophila and human heterochromatin protein Su(var)205 (HP1). The second class includes proteins with a single chromo domain, eg. Drosophila protein Polycomb (Pc); mammalian modifier 3; human Mi-2 autoantigen and several yeast and Caenorhabditis elegans hypothetical proteins. In the third class paired tandem chromo domains are found, eg. in mammalian DNA-binding/helicase proteins CHD-1 to CHD-4 and yeast protein CHD1.</p> <p>Functional dissections of chromo domain proteins suggests a mechanistic role for chromo domains in targeting chromo domain proteins to specific regions of the nucleus. The mechanism of targeting may involve protein-protein and/or protein/nucleic acid interactions. Hence, several line of evidence show that the HP1 chromo domain is a methyl-specific histone binding module, whereas the chromo domain of two protein components of the drosophila dosage compensation complex, MSL3 and MOF, contain chromo domains that bind to RNA in vitro [[cite:PUB00017969]].</p> <p>The high resolution structures of HP1-family protein chromo and chromo shadow domain reveal a conserved chromo domain fold motif consisting of three β-strands packed against an α-helix. The chromo domain fold belongs to the OB (oligonucleotide/oligosaccharide binding)-fold class found in a variety of prokaryotic and eukaryotic nucleic acid binding protein [[cite:PUB00017969]].</p> <p>This entry represents a conserved site in the chromo domain.</p>

This description is obtained from EB-eye REST.

Associated GO terms

Unable to find any GO terms for the transcript with the identifier.

Associated Lotus transcripts 8

Co-occuring domains 1

A list of co-occurring predicted domains within the L. japonicus gene space: