Protein
Nuclear cap-binding protein subunit 1
Organism
Drosophila pseudoobscura pseudoobscura
Function
Component of the cap-binding complex (CBC), which binds cotranscriptionally to the 5'-cap of pre-mRNAs and is involved in various processes such as pre-mRNA splicing and RNA-mediated gene silencing (RNAi). The CBC complex is involved in miRNA-mediated RNA interference via its interaction with Ars2 and is required for primary microRNAs (miRNAs) processing. Also involved in innate immunity via the short interfering RNAs (siRNAs) processing machinery by restricting the viral RNA production. In the CBC complex, Cbp80 does not bind directly capped RNAs (m7GpppG-capped RNA) but is required to stabilize the movement of the N-terminal loop of Cbp20 and lock the CBC into a high affinity cap-binding state with the cap structure (By similarity).
Similarity
Belongs to the NCBP1 family.
Sequence
MSRRRAHDTEDEGYDHRRNKRRRVSENQEIEDRLESLILRVGERSTSSVESNLEGLVSVLEADLGTFRLKILRILSDCAVRMPEKCTVYTTLVGLLNAKNYKFGGEFVDHMVKTFKESLKMCRWDAARYSLRFLADLVNCHVISATSLLQLLDTMIDVSNEDTVPQVRRDWFVFAVLSTLPWVGRDLYEKKESALESLLLRIEVYLNKRSKKHHNALRVWSSDAPHPQEEYLDCLWAQIRKLRQDNWAEKHIPRPYLTFDTILCEALQHNLPQIIPPPHNDAFVYPMPWVVYRMFDYTDCPDGPNLPGAHSIERFLIEEHLHHIIETYHHERKDCAAQLLSFPFKHKIPLEYCIVEVIFAELFHMPTPRYLDICYGSILIELCKLQPATLPQVLAQATEILFMRIDSMNTSCFDRFVNWFSYHLSNFKFTWSWDEWDSCLLLDGEHPRPKFIQEVLQKCLRLSYHQRITEMMPTTYGKLIPQVPVPNFKYASEEAASLPGTAVAHQLVVAIRQKCSPEEVVNILKEIPNSGYSGEEMSDGTFNALKIDVFVQTLLNLGSKSFSHSFAAISKFHSVFRALAETEEAQICVLHNIYELWSSHQQMMVVLVDKLLKLQIVDCSAVATWIFSKEMTSEFTKMYLWEILHLTIKKMNKHVIKLNTELSVAKDKLSKADSSSSESDEDAPTKRKKPITHADKPSEEAVERMEEKLEAANVNQKRLFLIVFQRFIMILSEHMLRSDTDGRDPDTDWYRWTIGRLQQVFLMHHEQVQKYSSTLETLLFTSDLDTHILEVFQQFVALRA