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Polypyrimidine tract-binding protein, also known as PTB or hnRNP I, is an RNA-binding protein. PTB functions mainly as a splicing regulator, although it is also involved in alternative 3' end processing, mRNA stability and RNA localization. [ 1 ]
Advanced Placement (AP) Biology (also known as AP Bio) is an Advanced Placement biology course and exam offered by the College Board in the United States. For the 2012–2013 school year, the College Board unveiled a new curriculum with a greater focus on "scientific practices". [1]
after (from Latin post) [1] [letter p with a bar over it] pH Potential of Hydrogen - Acidity of a fluid P: parturition (total number of live births) phosphorus pulse [1] post P OSM: plasma osmolality PA: posterior–anterior, posteroanterior pulmonary artery [[physician assistant or associate [2]]] psoriatic arthritis primary aldosteronism: P&A
They are often found in signal transduction proteins. PTB-domain binding specificity is determined by residues to the amino-terminal side of the phosphotyrosine. Examples: the PTB domains of both SHC and IRS-1 bind to a NPXpY sequence. PTB-containing proteins such as SHC and IRS-1 are important for insulin responses of human cells.
The PTB domains facilitate interaction with the activated tyrosine-phosphorylated insulin receptor. The PTB domain is situated towards the N terminus . Two arginines in this domain are responsible for hydrogen bonding phosphotyrosine residues on an Ac -LYASSNPApY- NH2 peptide in the juxtamembrane region of the insulin receptor.
Phosducin-transducin beta-gamma complex. Beta and gamma subunits of G-protein are shown by blue and red, respectively. Guanosine diphosphate Guanosine triphosphate. G proteins, also known as guanine nucleotide-binding proteins, are a family of proteins that act as molecular switches inside cells, and are involved in transmitting signals from a variety of stimuli outside a cell to its interior.
In 2015, the third version of TimeTree was released, with 2,274 studies and 50,632 species, represented in a spiral tree of life, [29] free to download. In 2015, the first draft of the Open Tree of Life was published, in which information from nearly 500 previously published trees was combined into a single online database, free to browse and ...
6908 21374 Ensembl ENSG00000112592 ENSMUSG00000014767 UniProt P20226 P29037 RefSeq (mRNA) NM_003194 NM_001172085 NM_013684 RefSeq (protein) NP_001165556 NP_003185 NP_038712 Location (UCSC) Chr 6: 170.55 – 170.57 Mb Chr 17: 15.72 – 15.75 Mb PubMed search Wikidata View/Edit Human View/Edit Mouse Protein family TBP crystal structure of a yeast brf1-tbp-dna ternary complex Identifiers Symbol ...