Talk:Non-coding RNA

I'm not sure that non-canonical tRNA bases are modified forms of A,C,G,U (like a methylated A), as opposed to just other bases. Anyone know any chemistry?

Info from the gene article to be incorporated "RNA genes are much harder to locate in genome sequences than conventional genes are. Because cells do not translate them, they lack the distinctive ATG codon that heads all protein-coding sequences and guides bioinformatics searches (more at reading frame)." Zashaw 02:57, 24 Aug 2003 (UTC)

hypen

sorry to nitpick, but i'm editing a biology paper for publication and was wondering whether its "noncoding" or "non-coding"? according to dictionary.com, noncoding is a word so it seems the former is the case. also, there exists "noncodingdna.com". if there are no objections, i or (someone else) will move this page to "noncoding RNA" in a few days. Bubbachuck 18:22, 19 July 2005 (UTC)

My experience is that both "non-coding RNA" and "noncoding RNA" are used about as often. For example, Google searches for each term in NCBI's site (to eliminate popular press): non-coding vs. noncoding. Personally, I think "noncoding" sounds ungrammatical (now _I'm_ being pedantic), but clearly people are using it. As long as one term redirects to the other, I won't complain. Zashaw 04:38, 20 July 2005 (UTC)

snRNA is not a synonym for non-coding RNA

snRNA (small nuclear RNA) is a class of non-coding RNAs, such as transfer RNA is also a class. But not all non-coding RNAs are snRNAs. Thus snRNA is not a synonym for non-coding RNA --User:AAM | Talk 11:54, 30 March 2006 (UTC)

Prokaryotic or Eukaryotic

I have a question: Of the 6 rRNAs listed (2 mitochondrial and 4 cytoplasmic) which are specific to prokaryotes?

What is a "RNA gene"?

Is the statement, "Nuclear genome contains c.a. 3000 RNA genes (less than 10% of total gene number)." true?

According to the FANTOM project, only 17,594 of the 33,409 transcriptional units were determined to have coding potential. As a result, all remaining units have the potential to be puative ncRNAs [Okazaki et al. (2002) Nature 420:563-573; Suzuki and Hayashizaki (2004) Bioessays 26:833-843]. A very recent estimate suggests that there may be at least 28,000 ncRNAs within the FANTOM library [Liu et al. (2006) PLoS Genet 2:529-536]. Another estimate has put the percentage, at least in humans, at around 98% [Mattick (2001) Embo Rep 2:986-991].

What exactly are you defining as an "RNA gene" in this statement?

A gene encoding for RNA (obviously). Might also encode for protein in theory; IONO whether such RNA genes have been found (or been looked for). Dysmorodrepanis 00:28, 24 February 2007 (UTC)

12S rRNA?

What is that? Dysmorodrepanis 00:29, 24 February 2007 (UTC)

Choices of example non-coding RNAs

Here are some thoughts on the section on types (families) of non-coding RNAs. Firstly I would agree that they are all types of RNA but not that they are all families. Perhaps remove the families part of the title. Also there is inconsitency about the titles. Why use Transfer RNA rather than tRNA? I would suggest that all the titles are given the short form such as tRNA, rRNA, snoRNA etc. Alexbateman 08:06, 10 May 2007 (UTC)

The diversity of RNA

Note: I originally posted this on the RNA talk page. I believe this article could do more to impress upon the reader the amazing diversity (and emerging importance) of RNA. Consider, for a moment, the following:

• Argonautes and Dicers and known be involved in RNAi-related gene-silencing events in many eukaryotes:
  • scnRNAs: ~28nt siRNAs are specifically expressed during conjugation.
• microRNAs
• endogenous siRNAs — can fall into different classes (based on their biogenesis and function) such as:
  • tasiRNAs (trans-acting short interfering RNAs)
  • natsiRNAs
  • heterochromatic siRNAs
• snRNAs
• snoRNAs
• rasiRNAs (repeat associated siRNA)
• piRNAs (discovered in 2006 and found to be abundant in developing sex cells. A male animal missing these would be infertile)
• XIST / Tsix (turns off the second X chromosome in females; see X-inactivation)
• PINC (pregnancy-induced non-coding RNA)
• RNAi (aka RNA interference)
• etc. --Thorwald 01:52, 19 June 2007 (UTC)

Distinction between functional RNA (fRNA) and ncRNA

The term mRNA is used in a confusing way in this section, doesn't mRNA have coding sections by definition? Narayanese (talk) 21:55, 23 December 2007 (UTC)

You're right. My brain must have fallen out when I wrote that section. I replaced mRNA with just plain RNA where appropriate. Cheers. 98.200.147.72 (talk) 05:22, 24 December 2007 (UTC)

The Sequence Ontology's definition of ncRNA is also incorrect. The term "ncRNA" is indeed problematic. There are a growing number of RNAs that are known to function on both the RNA and protein level eg. SgrS RNA and RNAIII. Coding, non-coding RNAs? However, in biology there always seem to be exceptions so we generally live with the awkwardness.--Ppgardne 10:46, 25 December 2007 (UTC) —Preceding unsigned comment added by Ppgardne (talk • contribs)

Hmm. SO folks are generally very receptive to corrections. Since SO/OBO_Foundry should be the definitive source for terminology, we can fix this issue in SO and change Wikipedia to match.

But what do we do? Option 1 is to treat cases like RNAIII as not ncRNAs (since they are also mRNA) and add fRNA to SO as an umbrella term (ncRNA is_a fRNA, RNAIII is_a fRNA, but RNAIII is not a ncRNA). Option 2 would be to change the SO definition of ncRNA such that the term fRNA is no longer useful (i.e. ncRNA==fRNA as it is defined on this page).

I wonder what the RNA Ontology has to say about this.

71.225.68.14 (talk) 23:26, 28 December 2007 (UTC)

redirecting from "noncoding RNA" and "ncRNA"

I tried searching Wikipedia for phrases/terms "noncoding RNA" (note the lack of hyphen) and "ncRNA", and this page comes up in neither search. Can those two pages be created and redirect to this one, somehow? Thanks. 98.200.147.72 (talk) 05:23, 24 December 2007 (UTC)