An RNA sequence not coding for a protein is termed as a noncoding (nc) RNA.
In general, the term noncoding RNA is used for RNA sequences that get transcribed from DNA but do not code for a protein. However, this does not imply that these RNAs do not code for any information or are devoid of any function. Studies have shown that the genome of mammals and other higher organisms gets transcribed into noncoding RNAs, which further undergo the process of splicing, leading to smaller products. The field of noncoding RNAs has progressed a great deal in the past decade due to the development of high-throughput sequencing tools and bioinformatic software (Delpu et al. 2016; https://www.whatisepigenetics.com/non-coding-rna/).
It is fascinating to know that a large chunk of the total RNA (around 60%) belongs to the class of noncoding RNAs. The functions of the noncoding RNAs involving complex mechanisms are gradually being understood. More or less, the...