Small nucleolar RNA SNORD66
Encyclopedia
SNORD66 is a non-coding RNA
(ncRNA) molecule which functions in the modification of other small nuclear RNA
s (snRNAs). This type of modifiying RNA is usually located in the nucleolus
of the eukaryotic cell which is a major site of snRNA biogenesis. It is known as a small nucleolar RNA
(snoRNA) and also often referred to as a guide RNA.
HBII-142 belongs to the C/D box class of snoRNAs which contain the conserved sequence motifs known as the C box (UGAUGA) and the D box (CUGA). Most of the members of the box C/D family function in directing site-specific 2'-O-methylation
of substrate RNAs.
HBII-142 is the human orthologue of the mouse MBII-142 snoRNA and is predicted to guide 2'O-ribose methylation of 18S ribosomal RNA
(rRNA) at residue C1272 .
An experiment that looked at 22 different non-small-cell lung cancer
tissues found that SNORD33
, SNORD66 and SNORD76
were over-expressed relative to matched noncancerous lung tissues.
Non-coding RNA
A non-coding RNA is a functional RNA molecule that is not translated into a protein. Less-frequently used synonyms are non-protein-coding RNA , non-messenger RNA and functional RNA . The term small RNA is often used for short bacterial ncRNAs...
(ncRNA) molecule which functions in the modification of other small nuclear RNA
Small nuclear RNA
Small nuclear ribonucleic acid is a class of small RNA molecules that are found within the nucleus of eukaryotic cells. They are transcribed by RNA polymerase II or RNA polymerase III and are involved in a variety of important processes such as RNA splicing , regulation of transcription factors ...
s (snRNAs). This type of modifiying RNA is usually located in the nucleolus
Nucleolus
The nucleolus is a non-membrane bound structure composed of proteins and nucleic acids found within the nucleus. Ribosomal RNA is transcribed and assembled within the nucleolus...
of the eukaryotic cell which is a major site of snRNA biogenesis. It is known as a small nucleolar RNA
SnoRNA
Small nucleolar RNAs are a class of small RNA molecules that primarily guide chemical modifications of other RNAs, mainly ribosomal RNAs, transfer RNAs and small nuclear RNAs...
(snoRNA) and also often referred to as a guide RNA.
HBII-142 belongs to the C/D box class of snoRNAs which contain the conserved sequence motifs known as the C box (UGAUGA) and the D box (CUGA). Most of the members of the box C/D family function in directing site-specific 2'-O-methylation
Methylation
In the chemical sciences, methylation denotes the addition of a methyl group to a substrate or the substitution of an atom or group by a methyl group. Methylation is a form of alkylation with, to be specific, a methyl group, rather than a larger carbon chain, replacing a hydrogen atom...
of substrate RNAs.
HBII-142 is the human orthologue of the mouse MBII-142 snoRNA and is predicted to guide 2'O-ribose methylation of 18S ribosomal RNA
Ribosomal RNA
Ribosomal ribonucleic acid is the RNA component of the ribosome, the enzyme that is the site of protein synthesis in all living cells. Ribosomal RNA provides a mechanism for decoding mRNA into amino acids and interacts with tRNAs during translation by providing peptidyl transferase activity...
(rRNA) at residue C1272 .
An experiment that looked at 22 different non-small-cell lung cancer
Lung cancer
Lung cancer is a disease characterized by uncontrolled cell growth in tissues of the lung. If left untreated, this growth can spread beyond the lung in a process called metastasis into nearby tissue and, eventually, into other parts of the body. Most cancers that start in lung, known as primary...
tissues found that SNORD33
Small nucleolar RNA Z195/SNORD33 family
Small nucleolar RNA Z195/SNORD33 is a non-coding RNA molecule which functions in the modification of other small nuclear RNAs . This type of modifiying RNA is usually located in the nucleolus of the eukaryotic cell which is a major site of snRNA biogenesis...
, SNORD66 and SNORD76
Small nucleolar RNA SNORD24
U24 is a member of the C/D class of snoRNA which contain the C and D box motifs. C/D box snoRNAs have been shown to act as methylation guides for a number of RNA targets. U24 is encoded within an intron of the gene for ribosomal protein L7a in mammals, chicken and Fugu...
were over-expressed relative to matched noncancerous lung tissues.