PROSITE documentation PDOC51640
MRG domain profile


MORF4 (mortality factor on chromosome 4), MRG15 (MORF4-related gene on chromosome 15) and MRGX (MORF4-related gene on chromosome X) are members of the MRG protein family that were first identified as transcription factors involved in cellular senescence. All expressed members of the MRG family are localized to the nucleus and have predicted motifs that indicate they function as chromatin remodeling complex components. MORF4, MRG15 and MRGX share a common C-terminal part but a different N-terminal part. The C-terminal similarity of all MRG family members (MORF4, MRG15 and MRGX homologs) defines a new conserved protein domain. The ~170 amino acid MRG domain binds a plethora of transcriptional regulators and chromatin-remodeling factors, including the histone deacetylase transriptional corepressor mSin3A and the nuclear protein PAM14 (protein-associated MRG, 14kDa) [1,2].

The MRG domain consists of three conserved blocks. It is predominantly hydrophobic, and consists of mainly α-helices that are arranged in a three layer sandwich topology (see <PDB:2F5J>). The hydrophobic core is stabilized by interactions among a number of conserved hydrophobic residues. The molecular surface is largely hydrophobic, but contains a few hydrophilic patches [3,4,5].

The profile we developed covers the entire MRG domain.

Last update:

February 2012 / First entry.


Technical section

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

MRG, PS51640; MRG domain profile  (MATRIX)


1AuthorsBertram M.J. Berube N.G. Hang-Swanson X. Ran Q. Leung J.K. Bryce S. Spurgers K. Bick R.J. Baldini A. Ning Y. Clark L.J. Parkinson E.K. Barrett J.C. Smith J.R. Pereira-Smith O.M.
TitleIdentification of a gene that reverses the immortal phenotype of a subset of cells and is a member of a novel family of transcription factor-like genes.
SourceMol. Cell. Biol. 19:1479-1485(1999).
PubMed ID9891081

2AuthorsBertram M.J. Pereira-Smith O.M.
TitleConservation of the MORF4 related gene family: identification of a new chromo domain subfamily and novel protein motif.
SourceGene 266:111-121(2001).
PubMed ID11290425

3AuthorsBowman B.R. Moure C.M. Kirtane B.M. Welschhans R.L. Tominaga K. Pereira-Smith O.M. Quiocho F.A.
TitleMultipurpose MRG domain involved in cell senescence and proliferation exhibits structural homology to a DNA-interacting domain.
SourceStructure 14:151-158(2006).
PubMed ID16407074

4AuthorsZhang P. Zhao J. Wang B. Du J. Lu Y. Chen J. Ding J.
TitleThe MRG domain of human MRG15 uses a shallow hydrophobic pocket to interact with the N-terminal region of PAM14.
SourceProtein Sci. 15:2423-2434(2006).
PubMed ID17008723

5AuthorsXie T. Graveline R. Kumar G.S. Zhang Y. Krishnan A. David G. Radhakrishnan I.
TitleStructural basis for molecular interactions involving MRG domains: implications in chromatin biology.
SourceStructure 20:151-160(2012).
PubMed ID22244764

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