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Ribonucleoprotein

ribonucleoprotein

(Science: protein) complexes of rNA and protein involved in a wide range of cellular processes.

Besides ribosomes (with which ribonucleoprotein was originally almost synonymous), in eukaryotic cells both initial rNA transcripts in the nucleus (hnRNA) and cytoplasmic mRNAs exist as complexes with specific sets of proteins.

processing (splicing) of the former is carried out by small nuclear ribonucleoproteins (snRNP). Other examples are the signal recognition particle responsible for targetting proteins to endoplasmic reticulum and a complex involved in termination of transcription.

Acronym: RNP


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Re: question for evolutionary biologist.

... them occurred gradually, step-by-step, the origin of the ribosome cannot be the product of an RNA world. Instead, it must be the product of a ribonucleoprotein world, an ancient world that resembles our own. It appears the basic building blocks of the machinery of the cell have always been ...

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by scottie
Sat Aug 25, 2012 10:50 pm
 
Forum: Evolution
Topic: question for evolutionary biologist.
Replies: 26
Views: 27785

Transcription

... and thus, lack the nuclear export signal to move out of the nucleus. As a result, most forms of RNA will bind to a protein molecule to form a ribonucleoprotein complex to be exported from the nucleus."

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by Batlee
Sat Mar 12, 2011 10:51 am
 
Forum: Molecular Biology
Topic: Transcription
Replies: 4
Views: 2312

Recombination in RNA viruses,Ruzic,Kovac

... are actually created, may also be limited by physical constraints. The negativestrand RNA viruses, for example, whose genomes are packaged into ribonucleoprotein structures by association with N protein, may be less permissive than other RNA viruses to copy┬▒choice recombination. And perhaps ...

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by anakovacevic
Sat Jun 12, 2010 8:28 pm
 
Forum: Cell Biology
Topic: Recombination in RNA viruses,Ruzic,Kovac
Replies: 2
Views: 35267

ribonucleoproteins

hey, my friend, a ribonucleoprotein is the essential component of ribosome. we know that ribosome is made of rRNA+protein. one simple ribosome has two subunits, one is large, the other one is smaller.

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by jeffrey
Thu Oct 27, 2005 11:22 am
 
Forum: Genetics
Topic: ribonucleoproteins
Replies: 4
Views: 2895

ribonucleoproteins

as the name suggests it's a comb.of na & proteins.ribosomes can b called so. the form of mrna transported from nucleus 2 cytoplasm is also a ribonucleoprotein.

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by lara
Mon Oct 03, 2005 5:17 am
 
Forum: Genetics
Topic: ribonucleoproteins
Replies: 4
Views: 2895


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