Protein: POLS_RUBVB
Sequence: MASTTPITMEDLQKALEAQSRALRAELAAGASQLRRPRPPRQRDSSTSGDDSGRDSGGPRRRRGNRGRGQRKDWSKAPPPPEERQESRSQTPAPKPPRAPPQPPQPPRMQTGRGGTAPRPELGPPTNPFQAAVARGLRPPLHDPDTEAPTEACVTSWLWSEGEGAVFYRVDLHFTNLGTPPLDEDGRWDPALMYNPCGPEPPAHVVRAYNQPAGDVRGIWGKGERTYAEQDFRVGGTRWHRLLRMPVRGLDGDSAPLPPHTTERIETRSARHPWRIRFGAPQVFLAGLLLAAVAVGTARAGLQPRTDIAAPPAPPQAPRAHGKHYGHHHHQLPFLGHDGHHGGTLRVGQHHRNASDVLPGHWLQGSWGCYNLSDWHQGTHICHTKHMDFWCVEHDRPPPVTPTPLTTAANSTTAATPATTPAPCHAGLNDSCGGFLSGCGPMRLRHGADTRCGRLICGLSTTAQYPPTRFGCTMRWGLPPWELVVLTARPEDGWTCRGVPAHPGTRCPELVSPMGHATCSPASALWLATANALSLDHALAAVVLLVPWVLIFMLCRRACRRRGAAAALTAVVLQGYNPPAYGEEAFTYLCTAPGCATQTPVPVRLAGVRFESKIVDGGCFAPWDLEATGACICEIPTDVSCEGLGAWVPAAPCARIWNGTQRACTLWAVNAYSSGGYAQLASYFNPGGSYYKQYHPTACDVEPAFGHSDAACWGFPTDTVMSVFALASYVQHPDKTVRVKFHTETRTVWQLSVAGVSCNVTTEHPFCNTPHGQLEVQVPPDPGDLVEYIMNYTGNQQSRWGLGSPNCHGPDWASPVCQRHSPDCSRLVGATPERPRLRLVDADDPLLRTAPGPGEVWVTPVIGSQARKCGLHIRAGPYGHATVEMPEWIHAHTTSDPWHPPGPLGLKFKTVRPVALPRALAPPRNVRVTGCYQCGTPALVEGLAPGGGNCHLTVNGEDVGAFPPGKFVTAALLNTPPPYQVSCGGESDRASARVIDPAAQSFTGVVYGTHTTAVSETRQTWAEWAAAHWWQLTLGAICALLLAGLLACCAKCLYYLRGAIAPR
What is the function of this protein?
Class II viral fusion protein (By similarity).  Fusion activity is inactive as long as E1 is bound to E2 in mature virion.  After virus attachment to target cell and clathrin-mediated endocytosis, acidification of the endosome would induce dissociation of E1/E2 heterodimer and concomitant trimerization of the E1 subunits (By similarity).  This E1 homotrimer is fusion active, and promotes release of viral nucleocapsid in cytoplasm after endosome and viral membrane fusion.  The cytoplasmic tail of spike glycoprotein E1 modulates virus release.  The surface glycoproteins display an irregular helical organization and a pseudo-tetrameric inner nucleocapsid arrangement (By similarity).
What are the official names of this protein?
Structural polyprotein, p110.
What are the subcellular locations of this protein?
[Capsid protein]: Virion. Host cytoplasm. Host mitochondrion. Note=The capsid protein is concentrated around Golgi region (By similarity). In the virion, it is probably associated to the viral membrane (By similarity). SUBCELLULAR LOCATION: [Spike glycoprotein E2]: Virion membrane; Single-pass type I membrane protein. Host Golgi apparatus membrane; Single-pass type I membrane protein. Note=E1 and E2 form heterodimer in the endoplasmic reticulum before they are transported to and retained in the Golgi complex, where virus assembly occurs. E1 possesses an endoplasmic reticulum retention signal, and unassembled E2 and E1 subunits are retained in the endoplasmic reticulum. Presumably, assembly of E2 and E1 would mask the signal, thereby allowing transport of the heterodimer to the Golgi complex. SUBCELLULAR LOCATION: [Spike glycoprotein E1]: Virion membrane; Single-pass type I membrane protein. Host Golgi apparatus membrane; Single-pass type I membrane protein. Note=E1 and E2 form heterodimer in the endoplasmic reticulum before they are transported to and retained in the Golgi complex, where virus assembly occurs. E1 possesses an endoplasmic reticulum retention signal, and unassembled E2 and E1 subunits are retained in the endoplasmic reticulum. Presumably, assembly of E2 and E1 would mask the signal, thereby allowing transport of the heterodimer to the Golgi complex.