Search results
Results from the WOW.Com Content Network
Cross-sectional drawing of the Ebola virus particle, with structures of the major proteins shown and labelled on the right. Nucleoproteins tend to be positively charged, facilitating interaction with the negatively charged nucleic acid chains. The tertiary structures and biological functions of many nucleoproteins are understood.
Influenza virus nucleoprotein (NP) is a structural protein which encapsidates the negative strand viral RNA.NP is one of the main determinants of species specificity. The question of how far the NP gene can cross the species barrier by reassortment and become adapted by mutation to the new host has been discussed.
The nucleocapsid (N) protein is a protein that packages the positive-sense RNA genome of coronaviruses to form ribonucleoprotein structures enclosed within the viral capsid. [ 2 ] [ 3 ] The N protein is the most highly expressed of the four major coronavirus structural proteins . [ 2 ]
RNP granules function mainly by physically separating or associating transcripts with proteins. They function in the storage, processing, degradation and transportation of their associated transcripts. RNP granules have been shown to have particular importance in cells where post-transcriptional regulation is of vital importance. For example ...
The proteins involved in the hnRNP complexes are collectively known as heterogeneous ribonucleoproteins. They include protein K and polypyrimidine tract-binding protein (PTB), which is regulated by phosphorylation catalyzed by protein kinase A and is responsible for suppressing RNA splicing at a particular exon by blocking access of the ...
Relief of suppression by H-NS can be achieved by the binding of another protein, or by changes in DNA topology which can occur due to changes in temperature and osmolarity, for example. [6] The CTD binds to the bacterial DNA in such a way that inhibits the function of RNA polymerase. This is a common feature seen in horizontally acquired genes. [7]
Proteins in the cytoplasm are termed cytosolic proteins which are produced by free ribosomes while proteins that localize to the nucleoplasm must undergo processing in the endoplasmic reticulum and golgi apparatus before being delivered to the nucleoplasm as part of the secretory pathway. These proteins also differ in function, as proteins that ...
Nucleolin is the major nucleolar protein of growing eukaryotic cells. It is found associated with intranucleolar chromatin and pre-ribosomal particles. It induces chromatin decondensation by binding to histone H1. It is thought to play a role in pre-rRNA transcription and ribosome assembly. May play a role in the process of transcriptional ...