pfam03172: HSR (this model, PSSM-Id:367372 is obsolete and has been replaced by 397335)
The Sp100 protein is a constituent of nuclear domains, also known as nuclear dots (NDs). An ND-targeting region that coincides with a homodimerization domain was mapped in Sp100. Sequences similar to the Sp100 homodimerization/ND-targeting region occur in several other proteins and constitute a novel protein motif, termed HSR domain (for homogeneously-staining region). The HSR domain has also been named ASS (AIRE, Sp-100 and Sp140). This domain is usually found at the amino terminus of proteins that contain a SAND domain pfam01342.