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Tag: "micrornas" at biology news

MicroRNAs play a big part in gene regulation - and evolution

Regulating when and where certain proteins are made is crucial to the normal functioning of living things. To make proteins, information from DNA is transcribed into RNA molecules and then translated into the amino acids building blocks of proteins. But not all genes code for proteins--some make RNA molecules called microRNAs. These small RNA molecules interfere with--and therefore control--the p...

Molecular steps involved in the creation of gene-silencing microRNAs identified

First discovered only a few brief years ago, microRNAs are small, remarkably powerful molecules that appear to play a pivotal role in gene silencing, one of the body's main strategies for regulating its genome. A scant 22 nucleotides in length, miRNAs appear to work by binding to and somehow interfering with messenger RNA, itself responsible for translating genes into proteins. . But how do miRNA...

Scientists find microRNAs regulate plant development

The plant hormone indole-3-acetic acid (IAA), commonly referred to as auxin, plays a major role in regulating plant growth and development. Auxin influences development by affecting the expression of numerous genes that control the processes of cell division and cell expansion in specific plant tissues at specific stages during the plant life cycle - e.g. for leaves, roots, and floral organs to d...

MicroRNAs have shaped the evolution of the majority of mammalian genes

RNA continues to shed its reputation as DNA's faithful sidekick. Now, researchers in the lab of Whitehead Institute Member David Bartel have found that a class of small RNAs called microRNAs influence the evolution of genes far more widely than previous research had indicated. . .. In order to make a protein, a gene codes for a specific molecule called messenger RNA, or mRNA. Each mRNA molecule c...

Twin molecular scissors link creation of microRNAs with gene-silencing

One of the body's primary strategies for regulating its genome is a kind of targeted gene silencing orchestrated by small molecules called microRNAs, or miRNAs. First observed only a few years ago, these molecules appear to inactivate messenger RNA, itself responsible for translating genes into proteins. Scientists have been eager to know more about miRNAs, clearly important players on the geneti...

MicroRNAs can be tumor suppressors

University of Virginia researchers have discovered that microRNAs, a form of genetic material, can function as tumor suppressors in laboratory studies. . .. ....

MicroRNAs as tumor suppressors

In the May 1st issue of G&D, Drs. Yong Sun Lee and Anindya Dutta (UVA) reveal that microRNAs can function as tumor suppressors in vitro. . .. Studying chromosomal HMGA2 translocations...
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