MicroRNA nomenclature - (Jan/06/2013 )

I a new to micro RNA research. I have some questions regarding its nomenclature. If I have miRNA-148 is it same as miRNA-148a, miRNA-148b, miRNA-148ab? are any of these similar to each other?

You can take a look at the help page of miRBASE. miRNA nomencalutre is evolving, you should read several of the papers listed on that page.

pcrman on Mon Jan 7 07:21:51 2013 said:

Hi pcrman, I think this link doesn't work (am also interested in the subject Guess you meant that: http://www.mirbase.o...enclature.shtml
"Lettered suffixes denote closely related mature sequences -- for example hsa-miR-121a and hsa-miR-121b would be expressed from precursors hsa-mir-121a and hsa-mir-121b respectively."
Also found this: http://www.mirbase.org/blog/2011/04/whats-in-a-name/

http://rnajournal.cshlp.org/content/9/3/277.full

"Identical or very similar miRNA sequences within a species can also be given the same number, with their genes distinguished by letter and/or numeral suffixes, according to the convention of the organism (e.g., the ∼22-nt transcripts of Drosophila mir-13a and mir-13b are slightly different in sequence, whereas those of mir-6-1 and mir-6-2 are identical)

thanks guys.
I want to find out if any of these are same.

miR-200bc and miR-200a and miR-200b

Any of these 3 are same? When it is written miR-200bc, does that mean it is miR-200b and c both?