description
There are three basic types of RNA polymerase III promoters. The three types of RNA polymerase III promoters are known as type 1, type 2, and type 3 promoters. Type 1 promoters are found in the 5S genes and consist of a gene-internal element called the internal control region (ICR), that is subdivided into A block, intermediate element, and C block (Bogenhagen, 1985; Sakonju et al., 1980). Type 2 promoters are found in tRNA genes, Adenovirus 2 VAI gene, and other genes (Galli et al., 1981; Sharp et al., 1981). These promoters consists of two gene-internal elements called the A and the B boxes. Type 3 promoters consist of a distal sequence element (DSE) that serves as an enhancer, a proximal sequence element (PSE), and a TATA box (Baer et al., 1989; Lobo and Hernandez, 1989). Some promoters combine elements from type 2 and 3 promoters. For example, the S. cerevisiae U6 promoter, also shown in the figure, contains the TATA box typical of type 3 promoters and the A and B boxes typical of type 2 promoters. Moreover, in S. pombe, nearly all tRNA and 5S genes contain a TATA box in addition to gene-internal elements, and the TATA box is required for transcription

external resources
NCBI:1269666
REACTOME:R-HSA-76046
PUBMED:7357599
PUBMED:7312050
PUBMED:6947245
PUBMED:7357604
PUBMED:2308839
PUBMED:2752422

genes
POLR3D , GTF3A , BRF1 , GTF3C1 , GTF3C2 , POLR2E , POLR2F , POLR2H , POLR2K , POLR2L , POU2F1 , SNAPC1 , SNAPC2 , SNAPC3 , SNAPC4 , TBP , ZNF143 , GTF3C5 , GTF3C4 , GTF3C3 , POLR1C , SNAPC5 , POLR3F , POLR3G , POLR3C , POLR3A , CRCP , POLR1D , POLR3K , BRF2 , POLR3B , POLR3E , BDP1 , POLR3GL , GTF3C6 , POLR3H ,