ID:MEP50_HUMAN DESCRIPTION: RecName: Full=Methylosome protein 50; Short=MEP-50; AltName: Full=Androgen receptor cofactor p44; AltName: Full=WD repeat-containing protein 77; AltName: Full=p44/Mep50; FUNCTION: Non-catalytic component of the 20S PRMT5-containing methyltransferase complex, which modifies specific arginines to dimethylarginines in several spliceosomal Sm proteins. This modification targets Sm proteins to the survival of motor neurons (SMN) complex for assembly into small nuclear ribonucleoprotein core particles. Might play a role in transcription regulation. The 20S PRMT5-containing methyltransferase complex also methylates the Piwi proteins (PIWIL1, PIWIL2 and PIWIL4), methylation of Piwi proteins being required for the interaction with Tudor domain- containing proteins and subsequent localization to the meiotic nuage. SUBUNIT: Component of the methylosome, a 20S complex containing at least PRMT5, CLNS1A and WDR77. Directly interacts with PRMT5, as well as with several Sm proteins, including SNRPB and SNRPD2 and, more weakly, SNRPD3 and SNRPE. Interacts with SUZ12 and histone H2A/HIST2H2AC, but not with histones H2B, H3 nor H4. Interacts with CTDP1 and LSM11. Interacts with APEX1, AR and NKX3-1. SUBCELLULAR LOCATION: Nucleus. Cytoplasm. Note=Nuclear in Leydig cells and cytoplasmic in germ cells during fetal testicular development. In adult testis, predominantly nuclear. Subcellular location varies from nuclear to cytoplasmic in various tumors. TISSUE SPECIFICITY: Highly expressed in heart, skeletal muscle, spleen, testis, uterus, prostate and thymus. In testis, expressed in germ cells and Leydig cells, but not in peritubular myocytes, nor in Sertoli cells. Expressed in prostate cancers, in seminomas and in Leydig cell tumors. DEVELOPMENTAL STAGE: Expressed in Leydig cells during fetal testicular development, especially during the second semester. Germ cells expression is detected as early as 10 weeks of gestation. SIMILARITY: Contains 5 WD repeats.
The RNAfold program from the Vienna RNA Package is used to perform the secondary structure predictions and folding calculations. The estimated folding energy is in kcal/mol. The more negative the energy, the more secondary structure the RNA is likely to have.
ModBase Predicted Comparative 3D Structure on Q9BQA1
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Orthologous Genes in Other Species
Orthologies between human, mouse, and rat are computed by taking the best BLASTP hit, and filtering out non-syntenic hits. For more distant species reciprocal-best BLASTP hits are used. Note that the absence of an ortholog in the table below may reflect incomplete annotations in the other species rather than a true absence of the orthologous gene.
US Server
Sequence and Links to Tools and Databases 
Common Gene Haplotype Alleles 
