This gene is a homolog of the Drosophila polyhomeotic gene, which is a member of the Polycomb group of genes. The gene product is a component of a multimeric protein complex that contains EDR2 and the vertebrate Polycomb protein BMI1. The gene product, the EDR2 protein, and the Drosophila polyhomeotic protein share two highly conserved domains, named homology domains I and II. These domains are involved in protein–protein interactions and may mediate heterodimerization of the protein encoded by this gene and the EDR2 protein.[6]
Mutations in this gene have been associated to cases of primary microcephaly.[7]
^Rual JF, Venkatesan K, Hao T, Hirozane-Kishikawa T, Dricot A, Li N, Berriz GF, Gibbons FD, Dreze M, Ayivi-Guedehoussou N, Klitgord N, Simon C, Boxem M, Milstein S, Rosenberg J, Goldberg DS, Zhang LV, Wong SL, Franklin G, Li S, Albala JS, Lim J, Fraughton C, Llamosas E, Cevik S, Bex C, Lamesch P, Sikorski RS, Vandenhaute J, Zoghbi HY, Smolyar A, Bosak S, Sequerra R, Doucette-Stamm L, Cusick ME, Hill DE, Roth FP, Vidal M (Oct 2005). "Towards a proteome-scale map of the human protein-protein interaction network". Nature. 437 (7062): 1173–8. Bibcode:2005Natur.437.1173R. doi:10.1038/nature04209. PMID16189514. S2CID4427026.
Tomotsune D, Takihara Y, Berger J, Duhl D, Joo S, Kyba M, Shirai M, Ohta H, Matsuda Y, Honda BM, Simon J, Shimada K, Brock HW, Randazzo F (Dec 1999). "A novel member of murine Polycomb-group proteins, Sex comb on midleg homolog protein, is highly conserved, and interacts with RAE28/mph1 in vitro". Differentiation; Research in Biological Diversity. 65 (4): 229–39. doi:10.1046/j.1432-0436.1999.6540229.x. PMID10653359.
Ohta H, Tokimasa S, Zou Z, Funaki S, Kurahashi H, Takahashi Y, Kimura M, Matsuoka R, Horie M, Hara J, Shimada K, Takihara Y (2000). "Structure and chromosomal localization of the RAE28/HPH1 gene, a human homologue of the polyhomeotic gene". DNA Sequence. 11 (1–2): 61–73. doi:10.3109/10425170009033970. PMID10902910. S2CID12637692.
Suzuki M, Mizutani-Koseki Y, Fujimura Y, Miyagishima H, Kaneko T, Takada Y, Akasaka T, Tanzawa H, Takihara Y, Nakano M, Masumoto H, Vidal M, Isono K, Koseki H (Sep 2002). "Involvement of the Polycomb-group gene Ring1B in the specification of the anterior-posterior axis in mice". Development. 129 (18): 4171–83. doi:10.1242/dev.129.18.4171. PMID12183370.
