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IRES sequences were first discovered in 1988 in the poliovirus (PV) and encephalomyocarditis virus (EMCV) RNA genomes in the laboratories of Nahum Sonenberg [1] and Eckard Wimmer, [2] respectively. They are described as distinct regions of RNA molecules that are able to recruit the eukaryotic ribosome to the mRNA. This process is also known as ...
HAV IRES, entero-/rhinovirus and cardio-/apthovirus IRES are all approximately 450 nt but differ greatly in their structures. A cardiovirus, EMCV, and an apthovirus, foot-and-mouth disease virus (FMDV) share about 50% identical IRES elements. HCV-like picornavirus IRES incorporates the most difference in IRES elements from the other three classes.
eIF4G is an important scaffold for the eIF4F complex and aids in recruiting the 40S ribosomal subunit to mRNA.. There are three mechanisms that the 40S ribosome can come to recognize the start codon: scanning, internal entry, and shunting.
2A peptides trigger the ribosome to skip peptide bond formation between the glycine (G) and proline (P) near the C-terminus of the 2A peptide, resulting in the peptide located upstream of the 2A peptide having extra amino acids appended to its C-terminus while the protein downstream the 2A peptide will have an extra proline on its N-terminus.
In molecular biology, the Nrf2 internal ribosome entry site (IRES) is an RNA element present in the 5′ UTR of the mRNA encoding the transcription factor Nrf2. It contains a stem-loop structure upstream of a ribosome binding site .
The BiP internal ribosome entry site (IRES) is an RNA element present in the 5' UTR of the mRNA of BiP protein and allows cap-independent translation. BiP protein expression has been found to be significantly enhanced by the heat shock response due to internal ribosome entry site (IRES)-dependent translation. It is thought that this ...
The c-sis internal ribosome entry site (IRES) is a RNA element found in the 5' UTR of the PDGF beta chain gene. The internal ribosome entry site contains three modules that can individually mediate internal ribosome entry. However, the full length sequence is required for maximal IRES activity.
The N-myc internal ribosome entry site (IRES) is an RNA element found in the n-myc gene. The myc family of genes when expressed are known to be involved in the control of cell growth, differentiation and apoptosis. n-myc mRNA has an alternative method of translation via an internal ribosome entry site where ribosomes are recruited to the IRES located in the 5' UTR thus bypassing the typical ...