RNR4 (RNA, ribosomal 45S cluster 4
) is a human
ribosomal DNA
The ribosomal DNA (rDNA) consists of a group of ribosomal RNA encoding genes and related regulatory elements, and is widespread in similar configuration in all domains of life. The ribosomal DNA encodes the non-coding ribosomal RNA, integral struc ...
gene located on
Chromosome 21
Chromosome 21 is one of the 23 pairs of chromosomes in humans. Chromosome 21 is both the smallest human autosome and chromosome, with 46.7 million base pairs (the building material of DNA) representing about 1.5 percent of the total DNA in cell ...
. Tandem copies of this gene form one of five
nucleolus organizer region ]
Nucleolus organizer regions (NORs) are chromosome, chromosomal regions crucial for the formation of the nucleolus. In humans, the NORs are located on the short arms of the acrocentric chromosomes 13, 14, 15, 21 and 22, the genes RNR1, RNR2, R ...
s in the human genome, they are located on the chromosomes 13 (
RNR1), 14 (
RNR2), 15 (
RNR3), 21 (RNR4), 22 (
RNR5).
See also
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Ribosomal RNA
Ribosomal ribonucleic acid (rRNA) is a type of non-coding RNA which is the primary component of ribosomes, essential to all cells. rRNA is a ribozyme which carries out protein synthesis in ribosomes. Ribosomal RNA is transcribed from ribosomal ...
(rRNA)
References
Further reading
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Nucleolus organizer region ]
Nucleolus organizer regions (NORs) are chromosome, chromosomal regions crucial for the formation of the nucleolus. In humans, the NORs are located on the short arms of the acrocentric chromosomes 13, 14, 15, 21 and 22, the genes RNR1, RNR2, R ...
s are chromosomal regions crucial for the formation of the nucleolus, located on the short arms of the acrocentric chromosomes 13, 14, 15, 21 and 22
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Non-coding RNA
Ribosomal RNA
Ribozymes
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